Binding and briquetting (C22B1/24)

ethod for manufacturing agglomerates and reduced iron // 2638487
FIELD: metallurgy.SUBSTANCE: method for manufacturing agglomerates comprises the stage of heat treatment of a powder containing iron oxide having 50% of particles with a diametre of 2 mcm or less at a heating temperature of 900-1200 °C to obtain a heat-treated powder, 50% of the particles of which has a diametre of 4 mcm or more, and the stage of granulating the resulting heat-treated powder to form agglomerates. The granulation is carried out by rolling granulation. The heat treatment is carried out for a heating period of 30 minutes or more preferably when rolling a powder containing iron oxide. It is possible to use an enrichment rejects which represent a precipitate remaining after the recovery of Ni from the nickel-containing ore as a powder containing iron oxide.EFFECT: obtaining agglomerate with high physical properties.6 cl, 5 dwg, 2 tbl, 1 ex
Charge for producing iron ore pellets (versions) // 2637850
FIELD: metallurgy.SUBSTANCE: according to the first version the charge contains iron ore concentrate and manganese limestone as a binding agent and flux, at that the ratio of charge components is as follows, wt %: manganese-containing limestone, 1.0-5.0; iron ore concentrate is the rest. According to the second version, the charge contains iron ore concentrate, bauxite as a modifying additive and manganese limestone as a binding agent and flux, at that the ratio of the charge components is as follows, wt %: manganese-containing limestone, 1.0-3.5; modifying additive, 1.2-1.5; iron ore concentrate is the rest.EFFECT: increased strength of green and roasted pellets while maintaining high iron content, reduced weakening-melting range of the pellets in the blast furnace, simplified production of iron-ore pellets.4 cl, 2 tbl, 1 ex

Pellet obtaining method // 2634524
FIELD: metallurgical engineering.SUBSTANCE: at the pelletiser bottom there formed scull: charge is supplied to the pelletiser in two flows. The first flow of charge is introduced into the gas stream with formation of gas-moisture-charge jet into which pore-forming additives are fed. As pore-forming additives, phytogenic particles grounded to the needle state or vegetable waste from agricultural production are used. At the pelletiser bottom there formed is a zone occupied with charge and a zone free from charge. The charge is sprayed on the skull in a zone free of charge, with the formation of a dense layer of wet charge, which is divided into nuclei, precombusting the embryos to the pellets with a charge of the second stream, drying and roasting them. In this case, the pore-forming additives are preliminarily soaked in a sulfite-fat distiller's beer for 0.1-3.0 hours at a temperature of 30-90°C.EFFECT: increase in strength and yield of conditioning pellets.1 dwg, 1 tbl, 1 ex
ethod of producing briquette for deoxidizing steel // 2633682
FIELD: metallurgy.SUBSTANCE: method includes pressing secondary aluminium and iron, at that the ground chip waste of mechanical processing of thermally strengthened Al-Si-Mg system alloy containing at least 89.6% aluminium, and crushed product of metallurgical scale reduction is mixed in the ratio of 25-50:75-50 wt %. The mixture is pressed to the density of 0.45-0.65 of theoretically possible, pressed briquettes are subjected to washing for cleaning from cutting fluid, repeatedly pressed to density of 0.75-0.90 of theoretically possible. On the surface of the briquettes there is a protective shell formed by dipping into suspension based on liquid glass with added particles of metallurgical scale reduction product.EFFECT: increased duration of storage, transportability and deoxidation efficiency of liquid steel with aluminium.5 cl, 5 tbl
ethod for producing pellets // 2631771
FIELD: metallurgy.SUBSTANCE: method includes preparation of a mass of magnesia materials and a binding agent, formation, and subsequent drying of the obtained pellets. An organomineral binder made of water and peat mixture is used as the binder agent, in proportion (3-3.9)/1. The ratio of components, wt %: magnesia materials, 80-85; binding agent, 15-20. The waste of talc basic flotation (TBF) is used as magnesian material or semi-product of talc (SPT), or burnt magnesite (BM), or serpentinite, or brucite.EFFECT: invention makes it possible to expand the range of the raw base and preserve the binding properties of the product for a long period of time with simplification of its manufacturing technology.2 cl, 2 tbl

Complex steel oxidazer based on lumpy silicon carbide // 2631570
FIELD: metallurgy.SUBSTANCE: lumpy silicon carbide (SiC) is used as material with a fraction more than 1 mm and moisture content less than 1% and its briquetted sifting of fraction less than 1 mm with final content in briquettes of basic element SiC 70-90%. Undersized SiC fractions less than1 mm briquetted with the use of beet molasses by vibrocompression into cylinders of up to 60 mm diameter and up to70 mm height or with the use of n inorganic binder with roller briquette press into tablets of up to 40 mm diameter and up to 30 mm height with strength of at least 400 kg/cm2.EFFECT: reduction of steel and cast iron production cost due to replacement of ferrosilicon with silicon carbide undersized fractions which surpasses ferrosilicon by technical characteristics.3 cl, 6 tbl, 5 dwg

Pellet heat treatment method // 2630405
FIELD: metallurgy.SUBSTANCE: damp pellets are stacked in a layer in the shape of an isosceles trapezoid on the conveyor belt disposed in heat-insulated hearth for partial drying by heated air supplied through the blow box is divided at least into 3 but not more than 10 sections, each of which is provided with a nozzle surface. The air temperature is maintained within the first section 300°C, and in the subsequent sections it is increased by 0.5-1.5°C per metre of the conveyor belt. In this case, the air duct sections are mounted movably in the vertical direction. In the first section, the distance between the nozzle surface and the pellets layer is selected to be 11 gauges, and in the subsequent sections this distance is reduced by 0.1-0.2 gauges per metre of the conveyor belt. The heated air flow is screened by sliding dampers of elastic material attached to the longitudinal edges of sections. Then, pellets are laid on the lattice grate of roasting machine and finally processed.EFFECT: invention improves the dehumidification efficiency along the cross section of a pellets layer.2 cl, 2 dwg, 1 tbl, 1 ex
Iron-ore material agglomerating method // 2628947
FIELD: metallurgy.SUBSTANCE: method for agglomeration of iron-ore materials includes preparation of agglomeration charge components for sintering, composition, mixing with its wetting to 3-4% with water and pelletizing the agglomeration chrage in the drum, laying it on the sintering machine, igniting and sintering the agglomeration charge, agglomeration sinter processing. At that, during pelletizing the mixed charge is humidified to 6-10% with pulp, containing bentonite of a size not exceeding 0.1 mm, and with betonite consumption of 2÷18 kg/t.EFFECT: increase of agglomerate impact strength, decrease of agglomerate abrasion resistance, increase of specific efficiency of the sintering machine and the yield growth of suitable agglomerate.6 cl, 1 tbl, 1 ex

Composite liquid material for arc electric shops // 2626368
FIELD: metallurgy.SUBSTANCE: charge material for electric arc furnaces consists of disperse iron-containing wastes of metallurgy and engineering and a carbonaceous binder that does not contain sulfur. The said waste contains oxidized and/or reduced iron with a ratio between them in the range of 1:0 to 0:1, and the ratio between mentioned waste and the binder is 0.7:0.3 to 0.2:0.8.EFFECT: invention provides for the recycling of disperse wastes of metallurgy and engineering, which include metal iron, carburization of a metal bath of an electric arc furnace and energy savings.1 tbl
Pellet obtaining method // 2625857
FIELD: metallurgy.SUBSTANCE: wet charge is fed to the pelletizer in two flows, forming a skull at the bottom of the pelletiszer, to form a working zone on the bottom of the pelletizer, occupied by pellets, and an empty zone, free from pellets, a nucleation, performed by forming a dense layer of wet charge in the zone free from pellets, rotating drums, installed with a gap to the skull surface, feed to the first flow of charge to said gap. In this case, the gap between the skull and each subsequent drum is set less than the previous one. Dividing the dense layer with the help of dividers, cleaning the skull from a dense layer of wet charge, and perform the after-pelletizing with the second flow of charge to obtain pellets. The rotating drums are tensioned with endless elastic band made with transverse metal ribs, the tension of which is carried out by means of a pressing device, and the dense layer of the charge is shielded from the sides with longitudinal metal guides.EFFECT: increasing strength of pellets and efficiency of the pelletizer.2 dwg, 1 tbl

Carbon nanotubes application in the ore minerals agglomerates for improving the mechanical strength // 2623523
FIELD: mining.SUBSTANCE: agglomerated product contains the fine ore, selected from the small particles of iron ore, nickel ore, manganese ore or mixtures thereof, the binder and the carbon nanotubes, as well as to the method for producing the ore agglomerates. At that the method includes dispersing of carbon nanotubes in the binding agent by mechanical stirring or using ultrasonic treatment, mechanical mixing with fine ore and agglomeration.EFFECT: increase of the mechanical strength.8 cl, 6 dwg, 11 tbl
Pellet obtaining method // 2612102
FIELD: metallurgy.SUBSTANCE: wet charge is fed into the pelletizer in two streams, one of which is fed to the bottom of the pelletizer to form thereon a ledge; on the pelletizer bottom, an idle area is formed free of charge, and a working area is formed from pellets ascending bed and pellets descending bed. The second charge stream is injected into the compressed gas flow in the jet device housing to form a gas moisture charge jet, which is oriented to the materials descending bed with formation of a spray area on the latter. At that the descending bed of the pellets in the spray area is screened by the baffle installed in the empty zone of the pelletizer. In the spray area, flexible longitudinal rails are mounted which are rigidly fastened to each other at the place of pellets entering the spray area and spaced from each other by the size of conditioned pellets, and wherein the rails and the baffle are made of elastic materials.EFFECT: invention improves pellets strength and the pelletizer capacity.2 dwg, 1 tbl, 1 ex

Flushing extrusion briquette for blast-furnace process // 2609888
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, particularly to production of extrusion briquette for washing hearths of blast furnaces. Extrusion briquette produced by stiff vacuum extrusion consists of scale of metallurgical production, bentonite and cement and contains, wt%: FeO>40; Fe2O3>25; MgO 0.01–2.8; MnO 0.01–1.5; C 0.01–1.5; SiO2 0.1–9.0; CaO 0.1–8.0, Al2O3 0.01–1.2, impurities < 3, content in briquette Fecommon> 60. Wherein compression strength is no less than 5.0 MPa, specific density is no less than 2.8 kg/dm3, open porosity is no less than 10 %, temperature of beginning of softening is no less than 1,200 °C.EFFECT: briquette has high chemical and physical-mechanical properties and provides qualitative flushing melts hearth of blast furnace to produce iron without deterioration of quality.1 cl, 1 dwg, 3 tbl, 2 ex

Extrusion briquette for blast furnace process // 2609885
FIELD: metallurgy.SUBSTANCE: invention refers to ferrous metallurgy, namely, obtainment extrusion briquette for blast furnace process. Extrusion briquette obtained by stiff vacuum extrusion consists of metallurgy scales, carbon-containing material, bentonite and cement, and contains, wt %: FeO < 40; Fe2O3 > 20; MgO 0.01-2.5; MnO 0.01-9.0; Cr2O3 0.01-1.5; C 0.1-75.0; S 0.01-0.5; SiO2 0.1-15.0; TiO2 0.01-0.1; CaO 0.1-7.0; Al2O3 0.01-1.5, impurities < 2, where content of Fetotal comprises 10.0-58.0. Compression strength is at least 5.0 MPa, specific density is at least 2.8 kg/dm3, open porosity comprises at least 10 %, and softening start temperature is at least 1200 °C.EFFECT: possible obtainment of briquettes with high physical and chemical properties that allow for high performance of cast iron and optimize cast iron production process in a blast furnace due to early formation of carbon oxides and faster reduction of iron from oxides.2 cl, 1 dwg, 3 tbl, 2 ex

Extrusion briquette for steel production // 2609884
FIELD: metallurgy.SUBSTANCE: invention refers to ferrous metallurgy, namely to obtainment of extrusion briquette containing metallurgy waste, such as metallurgy scales, and intended for use as a charge component in steel making processes. Extrusion briquette obtained by stiff vacuum extrusion consists of metallurgy scales, carbon-containing material, bentonite and cement, and contains, wt %: FeO > 10; Fe2O3 > 10; MgO 0.1-7.0; MnO 0.1-4.5; Cr2O3 0.01-1.5; C 0.8-40.0; SiO2 0.1-10.0; ZnO 0.01-0.5; TiO2 0.01-1.5; CaO 0.1-10.0; Al2O3 0.1-15.0, impurities < 3, where content of Fetotal comprises 20.0-80.0. Compression strength is at least 5.0 MPa, specific density is at least 3.0 kg/dm3, open porosity comprises at least 10 %, and softening start temperature is at least 1200 °C.EFFECT: homogeneous quality of briquettes serving as accelerators of formation of highly active foaming free-running slag with increased content of lower iron oxide, reduced melting time and emergy cost, increased metal yield.2 cl, 1 dwg, 3 tbl, 2 ex

Extrusion briquette for vanadium-containing slag obtainment in vanadium cast iron recycling // 2609883
FIELD: metallurgy.SUBSTANCE: invention refers to ferrous metallurgy, namely to obtainment of extrusion briquette containing metallurgy waste, such as metallurgy scales, and intended for obtainment of commercial vanadium-containing slag in the process of vanadium cast iron recycling. Extrusion briquette obtained by stiff vacuum extrusion consists of metallurgy scales, bentonite and cement, and contains, wt %: FeO 10.0-90.0; Fe2O310.0-90.0; MnO 0.01-1.5; Cr2O3 0.01-0.5; S 0.01-0.25; SiO2 3.0-7.0; CaO 0.1-5.0, impurities < 3, where content of Fetotal comprises > 60. Compression strength is at least 5.0 MPa, specific density is at least 3.0 kg/dm3, open porosity comprises at least 10 %, and softening start temperature is at least 1200 °C.EFFECT: obtainment of briquettes with high chemical properties and homogeneous quality, serving as high quality products used as oxidation and cooling material in vanadium slag production.2 cl, 2 dwg, 3 tbl, 2 ex

Systems and methods for recycling steelmaking converter exhaust residue and products made thereby // 2605409
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgy and can be used for processing sludge from a fume scrubbing system of a steelmaking converter and articles made therefrom. System includes equipment for separation and processing of sludge for separation of substantially microspheres metallic iron from material not related to metal iron, wherein said separation equipment comprises an ultrasonic cleaner for removal of surface of small fractions, associated with microspheres metallic iron using at least two different excitation frequencies of acoustic cavitation for creation of metal microspheres with treated surface, and moulding equipment for arrangement of microspheres of metallic iron with treated surface, separated by said equipment for separation, and moulding using same lumpy material substantially consisting of microspheres of metallic iron. Lumpy material is used as a charge material in melting steel in steelmaking converter or arc furnace.EFFECT: invention enables to use briquettes with high content of metal iron in steelmaking charge material for oxygen converter or arc furnace, and water used in system, which is returned and reused in system, making system harmless to environment, as well as use of sludge in form of pellets and/or agglomerate for production of cast iron.24 cl, 16 dwg

Binder composition for agglomeration of fine minerals and pelletising method using same // 2604546
FIELD: chemistry.SUBSTANCE: present invention relates to binder for pelletising fine mineral particles, containing a) at least one colloidal substance, which generates a cohesion force on mineral particles forming pellets, and b) at least one synthetic polymer, which uniformly disperses mineral particles in pellets. Invention also relates to a mineral composition intended for supply into a blast furnace, comprising said binder, a method of pelletising fine mineral ore using said binder and use of said binder as an additive in pelletising mineral ore.EFFECT: invention is aimed at reducing required amount of silicon dioxide and calcium hydroxide when sintering fine iron ore.47 cl, 7 tbl, 7 ex

ethod of making briquettes from fine siftings or powdery ferrosilicomanganese (ferrosilicon) wastes // 2600775
FIELD: chemistry.SUBSTANCE: invention relates to briquetting of small waste of ferroalloy production in the form of ferrosilicon manganese or ferrosilicon. Waste is dosed, plasticizer is added, mixed with liquid glass, produced mixture is pressed into briquettes, strengthening of briquettes by neutralizing the alkaline element in liquid glass and drying of briquettes is obtained. Plasticizer used is an acid liquid-plastic substance which is applied on the surface of particles of mentioned wastes in the form of films at mixing of the mixture before mixing with liquid glass. Strengthening of briquettes is performed by neutralization of alkali element in liquid glass by chemical reaction between liquid glass in contact with plasticizing film of plasticizer, consisting of treacle-molasses, pretreated with acid containing additives.EFFECT: invention allows to reduce the degree of oxidation of silicon in briquettes, improve strength and higher briquettes solubility in liquid metals and alloys.5 cl, 1 tbl
ethod of metal chip briquetting // 2593565
FIELD: metallurgy. SUBSTANCE: invention relates to metallurgy and can be used in processing of metal chips and sludge wastes of metallurgical industry. One crushes and cleans the chips, adds binding material, mixes 70-75 % of ferrous metal chips and 25-30 % of aluminium alloy chips for 1-3 minutes. One loads the mixture into a die mold for 1/3 of its height, adds binding material in the amount of 30-35 % of metal chips volume, in the quality of which use is made of powdered components in the form of peat with particle size of up to 3 mm, arc-furnace sludge with iron oxide content Fe2O3 - 70-80 % with the following ratio, MP: peat - 30-35, arc-furnace sludge - 65-70, and paste-forming liquid based on molasses for preparation of which use is made of water - 30-40 %, rest - molasses. At that, consumption of paste-forming liquid is 40-45 % of the weight of the powdered components, then one adds the remaining portion of metal chips, compacts the mixture, pushes it from the die mold and dries at a temperature of 70-75 °C during 40-50 minutes. EFFECT: higher mechanical strength and physical and chemical stability of briquettes, reduction of their cost and wider raw material base. 1 cl

Briquette for alloying of aluminium alloy // 2590441
FIELD: metallurgy.SUBSTANCE: invention relates to briquettes for alloying during melting of aluminium alloys. Briquette contains aluminium alloy chips with copper and copper particles in amount of 20-40 wt% of total weight of briquette. Copper particles can be used in form of chips.EFFECT: briquette immersion into melt during melting of aluminium alloys, as well as recycling of wastes in form of chips of aluminium alloy with copper.1 cl, 1 tbl, 4 ex

ethod of intensifying processes of agglomeration of iron ore materials // 2590034
FIELD: metallurgy.SUBSTANCE: invention relates to production of agglomerate. To intensify the process of agglomeration, charge is prepared for agglomeration, consisting of iron-ore concentrate, ore, flux, solid fuel and interpolymer binding additive, mixing and sintering. Method uses interpolymer binding additive, subjected to mechanochemical activation and thermal action, in an amount of 1/100-1/400 units of weight of solid fuel. Mixture comprises mineral additives and a polymer complex comprising following: low viscosity polysaccharide anionic polymer with a viscosity number of 1 % suspension of less than 5 mPa*s - 20-40 %, highly viscous non-ionic polyacrylamide having a molecular weight of 5-15 x 106 and a degree of hydrolysis of less than 6 % with 1 % slurry viscosity greater than 50 mPa*s - 5.10 % and a mineral additive - balance. Mineral additives in low-viscosity polymer are natural aluminosilicate minerals in an amount of 40 % by weight of polymer, and in high-viscosity polymer - alkali and alkali-earth metal salts in an amount of 30 %.EFFECT: invention increases efficiency of process by increasing rate of formation of solid pellets optimum granulometric composition of high iron content.4 cl, 2 tbl, 1 ex

Section for receiving and processing chips of ferrous and nonferrous metals // 2586179
FIELD: metallurgy.SUBSTANCE: invention can be used at factories of machine building and metallurgy for processing steel and iron chips into dense, durable briquettes, free from impurities. Equipment consists of in-series installed septic tank for receiving lubricating-cooling liquids 1, receiving hopper for chips 2 assembled with flute, chip crusher 3, conveyor to feed crushed chips 4, intermediate hopper with screw feeder 5, chip supply conveyor 6, briquetting press 7, briquette accumulator 8, briquettes feed conveyor 9 and movable container-accumulator of ready briquettes 10. Chip receiving hopper has inclined bottom 5°, and conveyor to feed crushed chips and conveyor for feeding chips are made steeply inclined at an angle of 45°.EFFECT: invention provides cleaning of chips from lubricating-cooling liquids in natural way, reduction of production area, high density of briquettes, operational mode setting briquetting and removal on reprocessing briquettes with friability not at normal.1 cl, 2 dwg

ethod of producing extrusion briquette // 2584836
FIELD: metal processing.SUBSTANCE: invention relates to production of extrusion briquette from mill scale, intended for use as iron-containing raw material when melting cast iron or steel. Scale -3 mm fraction is mixed with 1-2 % bentonite, additional mixing is carried out with simultaneous addition of water to obtain a homogeneous mixture. Mixture is foamed for 8 to 24 hours. Method includes mixing in two-roll mixer with addition of 5 % of cement and water for obtaining humidity of charge 12-15 %, feeding into a vacuum chamber of extruder with preliminary compaction of charge in batcher extruder and passed through extruder, made with fixed front part of axis of main extrusion screw.EFFECT: technical result consists in production of briquettes with high chemical and physical-mechanical properties, homogeneous quality with strength characteristics and specific density.1 cl, 1 dwg, 1 tbl, 2 ex

ethod of making pellets // 2583226
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, specifically to production of iron-ore pellets. At pelletiser bottom there is a slag lining; wet charge is supplied to pelletiser in two flows, first flow is added to compressed gas flow in housing of jet device to form a gas wet charge jet, formed at pelletiser bottom zone occupied with charge and zone free of charge. Nucleation with charge sputtering on slag lining gas wet charge jet in zone free from charge so that dense layer of wet charge, and its longitudinal division by means of plate-like blades and transverse fission into nuclei by means of rotary drum with ribs. Scull is cleaned from nuclei and shell is formed by additional pelletising of pellets with charge of second flow. Simultaneously with cross division of sputtered layer on nuclei, in latter through holes are made with diameter 2-5 mm using rods arranged equidistant between ribs of drum with an interval between neighbouring rods, equal to size of nuclei, wherein said rods are moistened before making holes.EFFECT: invention provides higher strength of pellets and efficiency of pelletiser.1 cl, 3 dwg, 1 tbl, 1 ex
Extrusion-type briquette (breks)-component of charge of shaft furnaces direct production of iron // 2579706
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, in particular to methods of agglomerating iron ore, and may be used in preparing charge of shaft furnaces for direct iron production. Extrusion briquettes BREKS obtained by hard vacuum extrusion technology from a material mixture comprising a mineral binder, fine wastes shaft furnace direct iron scale rolling mill fines oxidised iron-ore pellets and dust aspiration of electric arc furnaces is used as a component of charge shaft furnaces for direct iron production. Mineral binder is in BREKS is granulated magnesium sulphate heptahydrate MgSO47H2O and, if necessary, bentonite.EFFECT: invention provides minimum consumption of binder in a briquette, high hot strength and restorative, as well as possibility to use together with other components of charge without swelling and scull formation.1 cl, 2 ex
Processing of zinc-and-iron-bearing fines of metallurgy // 2574952
FIELD: metallurgy.SUBSTANCE: zinc-iron-bearing dusts are formed to the pellets by rolling with carbon reducing agent added to the charge as the suspension in the acetic solution with concentration of 3-10 wt %. High-temperature treatment is performed in the annealing furnace at 900-1100°C by the feed of heat carrier, extraction and catching of zinc oxide.EFFECT: higher wettability of the charge, formation of extra surface bonds, dust particles are agglomerated to get the solid pellets.4 ex
etal chip briquetting method // 2574941
FIELD: metallurgy.SUBSTANCE: metal chips comprising chips of ferrous metals and aluminium alloys are crushed, cleaned, a binding material is added, mixed and compacted in a die-mould. The ferrous metal chips are connected with the aluminium alloy chips in a ratio 3:1, mixed for 0.5-1 minute, and loaded into the die-mould cavity by 1/3. Then the binding material is added according to 10-20% of the volume of the metal chips, as such powder components at the following ratio in wt % are used: bentonite 10-15, marshallit 20-30, slag of electric steel making furnaces - the rest, and a paste-forming liquid, i.e. emultex, for its preparation PVA adhesive - 50%; methanol/ethanol - 10%; water - 40% are used. At that emultex consumption is 25-35% of the weight of the powder components, then the rest part of metal chips is added, compacted, extruded from the die-mould, and dried at 60-70°C for half a hour.EFFECT: increased strength, physical and chemical stability of briquettes.

ethod of iron ore processing // 2574560
FIELD: metallurgy.SUBSTANCE: ore is screened to coarse, medium and fine classes. Coarse grain ore is subjected to sensory separation with the extraction of rough concentrate and final tailings while the rough concentrate is additionally screened to medium grain size and subjected to magnetic separation to get the final tailings and concentrate. Medium class ore is subjected to sensory separation to get the final tailings and rough concentrate while the latter is subjected to magnetic separation to produce final tailings and concentrate. Concentrates produced from the coarse and medium class ore are subjected to undersize of grain size equal to that of fine class and oversize used as the metallurgical stock. Note here that the fine class ore is subjected to magnetic separation to get the final tailings and concentrate. The concentrate is combined with undersize produced from coarse and medium classes and pelletised.EFFECT: produced agglomerate with high content of iron making the high-quality metallurgical stock, simplified process.2 cl, 3 dwg, 2 ex
Fuel and metallurgical granules, and method of their production and metal coating // 2568797
FIELD: metallurgy.SUBSTANCE: fuel and metallurgical granules contain iron containing component, carbon containing component and fluxing addition - in form of lime, limestone, dolomite, chalkstone. As iron containing component the ironstone goethite-hydrogoethite oolites dehydrated at 320-380°C are used, and as carbon containing component the fine-grained semicoke of brown coal and/or peat in form of gel/sol with removed mineral part (ash of semicoking) is used. At that the charge components are mixed until homogeneous composition, heated and fed to the grainer of extruder type to produce granules in form of cylinders with diameter and height 8-16 mm.EFFECT: production of qualitative raw material from irreducible iron ore and low carbonized fuel-recovery raw material suitable to produce several purpose concentrates and metallurgical treatment products.8 cl, 1 ex

Production of iron ore pellets // 2567946
FIELD: metallurgy.SUBSTANCE: claimed process comprises preparation of charge for green pellets, pelletising of charge to get green pellets, drying, annealing and cooling of pellets. On said preparation of charge, iron-bearing material is mixed with undersized coke and slaked lime. Said iron-bearing material represents slag and/or dust of gas cleaners of blast-furnace, open-hearth, converter or electric furnace steel making processes, or mixed thereof. Amount of undersized coke is 1.2-1.4 times larger than total amount of iron and zinc in iron-bearing material. Amount of slaked lime makes 0.14-0.20 of total amount of undersized coke and iron-bearing material. Obtained charge is directed to trough-like pelletiser for wetting to moisture content of 12-16 wt %. Produced pellets are dried in belt-type drier at 150-250°C for 1-3 hours. Then dry pellets are screened at two-sieve screen. Note here that specification pellets are transferred to drum-type counter flow furnace to anneal the pellets at 950-1050°C for 2-3 hours.EFFECT: higher efficiency of recovery of metallurgical wastes.4 cl, 2 dwg, 1 tbl
Iron ore pellets for metallurgical production // 2566703
FIELD: metallurgy.SUBSTANCE: iron ore pellets for metallurgical production contain ferriferous material and binder, and also undersized coke. The binder in pellets is slack lime, and the ferriferous material is slime and/or dust of gas purifications of domain, martin, converter or electric steelmaking productions or their mix. The amount of undersized coke 1.2-1.4 times exceeds total amount of iron and zinc in ferriferous material, and the amount of slack lime is 0.14-0.20 from total of undersized coke and ferriferous material.EFFECT: improvement of efficiency of recycling of metallurgical production.3 cl, 1 tbl

ethod of strengthening of wet iron-ore pellets // 2554837
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, and can be used for strengthening of wet iron-ore pellets. The method includes forming of the pellets by the wet charge pelletisation in pelletiser to provided the wet pellets with strength. Bentonite added to the charge prior to the above actions is treated in the pulse magnetic field of rectangular shape. Number of pulses is 20, magnetic field intensity of each pulse is 480 Oe, each pulse width is 0.2 s, and pause width between each pulse is 1.0 s.EFFECT: invention increases strength of the wet iron-ore pellets, keeps iron high content in them, and reduces amount of the destructed particles during transportation to the baking machine for oxidising baking.1 tbl

ethod of metal scrap heating // 2554248
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, namely, to steel production in electric arc furnace. Method of metal scrap heating for steel production in the arc furnace includes creation of the work body for the metal scrap heating, and its recirculation by combustion of products of the metal scrap drying and scrap organic compounds decomposition taken from top of the scrap heating chamber with addition of the required volume of natural gas and air for combustion, supply of the produced work body back to bottom part of the scrap heating chamber. Surplus of gases generated during the work body production and its recirculation are discharged to atmosphere, at that additionally there is catalytic thermal treatment for the surplus gases neutralisation by heating to temperature of the catalytic thermal treatment by means of combustion of the natural gas supplied with the appropriate air quantity, and heat exchange of the neutralised surplus gases with air supplied for combustion to produce the work body, at that the neutralised surplus gases is cooled prior to discharge to the atmosphere.EFFECT: neutralisation of the organic compounds generated during heating of the scrap with organic inclusions, fuel saving, improved labour safety, exclusion of vapour explosions in the furnace.1 dwg

Pellet obtaining method // 2553731
FIELD: metallurgy.SUBSTANCE: wet charge is supplied to pelletiser by two flows. One is supplied to the pelletiser bottom with skull creation on it. On the pelletiser bottom the empty zone is formed free of charge, and work zone made out of ascendant intrinsic bed and descending bed of the pellets is formed. The second charge flow is added to flow of compressed gas in the jet device with creation of the gas-wet charge jet oriented towards the descending bed with formation of the spattering zone. At that the descending bed of the pellets in the spattering zone is screened by the curvilinear baffle installed in the empty zone of the pelletiser. In the work zone of the pelletiser the divider Is installed embedded in the ascendant bed of the pellets, and top part of the ascendant bed of the pellets is oriented at height of the divider embedding in the spattering zone.EFFECT: invention improves strength of pellets and capacity of the pelletiser.2 dwg, 1 tbl, 1 ex

etal scrap heating method // 2552807
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, namely to steel making in electric arc furnaces. The metal scrap heating method for steel making in arc furnaces includes the use of a scrap heating chamber with a gas return circuit, gases are withdrawn from the top part of the chamber by means of recirculation smoke exhauster, and a part of return gases by means of the smoke exhauster of flue gases are supplied to a chimney and discharged into atmosphere. The method provides preparation of heat carrier in the heat generator by burning of natural gas with oxidiser which is obtained by mixing of part of return gases with oxygen, adding of the heat carrier together with another part of return gases into the bottom part of the scrap heating chamber, and also withdrawal from the output of the heat generator of a part of gases of the heat carrier where their temperature is sufficient for decomposition of dioxine, with their subsequent holding at this temperature, cooling by injected water down to the temperature excluding repeated synthesis of dioxine, and supply of the cooled heat carrier gases into the flue gas path with ensuring heat exchange with oxygen which is supplied for obtaining of the named oxidiser.EFFECT: method allows to avoid emission of dioxine with flue gases, reduce consumption of natural gas for heat carrier preparation due to recovery of heat of flue gases to oxidiser, reduce water consumption cooling of flue gases due to reduction of yield of these gases because of recirculation, avoid steam explosions in the arc furnace.1 dwg
Briquette for metallurgical treatment // 2549029
FIELD: metallurgy.SUBSTANCE: briquette contains carbon containing substance and iron containing material including cast iron and steel shavings, iron oxides, lime dust and dust of ventilation system of electric arc furnaces as sources of iron oxide. Components of the briquette are contained in the following ratio, wt %: carbon containing substance - 10-15; lime dust - 5-10; iron containing material - rest, at that content of dust of the ventilation system of the electric arc furnaces is 10-15%. In the iron containing material quantity of the cast iron and steel shavings is in ratio 1:1.EFFECT: reduced volume of slag during melting and increased quality of composition correction of the melted cast iron.2 cl, 2 tbl, 1 ex

etal chip briquetting process // 2547368
FIELD: process engineering.SUBSTANCE: invention relates to metal forming and can used for fabrication of pellets for further processing by, for example, forging or ESR process. Chips are ground, compacted and subjected to sputter-ion sintering along with compressive pressure. Note here that that pressure is varied from 0.06 to 0.15 of breaking point of initial process material while the number of pulses is varied from 2 to 8. Duration of one pulse varies from 0.5 to 2.0 s while that between two individual pulses varies from 0.2 to 1.0 s, total duration of pulses making 1-16 s. Specific power supplied at sputter-ion sintering is defined by the formula Esp= k · Tfus · C, where k is factor selected to make 0.6-0.95; Tfus is metal fusion point, K; C is specific heat capacity, kJ/(kg·K).EFFECT: lower electric power input and higher strength.4 tbl

Iron-ore pellet obtaining method // 2542186
FIELD: metallurgy.SUBSTANCE: components of the charge containing a binding agent in the form of a mixture of bentonite and red mud, and an iron-ore concentrate are dosed and mixed. Pelletisation of the prepared charge and firing of raw pellets is performed. First, red mud is dealkalised with a lime mortar till alkali content is less than 1% and charge in the quantity of 1.0-2.5 wt % is added. Pelletisation is performed at charge humidity of 8.0-9.3 wt %. Ratio of red mud and bentonite in the binding agent is maintained within 2.3-11.4.EFFECT: invention allows reducing the quantity of the binding agent used in the charge at maintenance of high strength properties of the obtained product and prevention of environmental pollution.4 cl, 3 tbl, 1 ex

ethod of red mud processing // 2542177
FIELD: metallurgy.SUBSTANCE: method of red mud processing involves red mud pelletising, drying and further two-stage high temperature baking including oxidation baking stage at 1000-1150°C in air flow and reducing baking stage. Reducing baking stage is performed with feed of adiabatic catalytic conversion products from natural gas heated by gas flow from oxidation baking aggregate, to reducing reactor. Pelletised mud is dried by contact with natural gas heated to 260-450°C. Gas flow from oxidation baking aggregate is supplied both for natural gas heating and to production and superheating of water steam fed to a mix with natural gas.EFFECT: enhanced hydrocarbon utilisation rate, reduced coke consumption and costs.9 cl, 1 dwg, 2 tbl, 1 ex

Pellet obtaining method // 2537982
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy, namely to production of iron-ore pellets. Laminated skull is formed at the bottom of a pelletiser; wet charge is supplied to the pelletiser in two flows; the first flow is added to a compressed gas flow in a jet apparatus housing so that a gas moisture charge jet is formed. A zone occupied with charge and a zone free from charge is formed at the pelletiser bottom; nucleation is performed by sputtering of charge onto skull with a gas moisture charge jet in the zone free from charge so that a dense layer of wet charge is obtained. The above dense layer of wet charge is separated into nuclei by means of plate-like knives; skull is cleaned from nuclei by means of a rotary drum with ribs and a cover of pellets is formed by additional pelletising of pellets with charge of the second flow till pellets are obtained. Prior to sputtering, charge skull is shaped by cutting of charge with formation of a cavity allowing to obtain a flat surface of a dense layer. With that, cut charge is formed and compacted beyond boundaries of the dense layer of charge so that an annular briquette is obtained with the height equal to height of the dense charge layer.EFFECT: invention is aimed at increase of strength of pellets and efficiency.1 tbl, 3 dwg
ethod of dosing energy when pulsed briquetting metal chips // 2537102
FIELD: test equipment.SUBSTANCE: invention relates to test equipment, in particular to tests relating to dosing energy when pulsed briquetting metal chips. Essence: the volume of plastically deformed chips by the time of the briquetting strike is preliminarily imparted by rigid lateral limitation providing numerical equality of dimensionless values - the true relative deformation in height of the obtained briquette and the degree of its porosity α. The dose of energy E for pulse briquetting of chips is calculated by the equation E=σtαV, where σt is dynamic tension in a solid metal; αV is the volumetric quantity of the metal in the briquette.EFFECT: energy dosing accuracy for obtaining briquettes with preliminarily assigned density is increased, and the conditions are formed for the creation of equipment, capable to operate reliably under the conditions of an impact.

Inhibition method of emission of solid particles during friction of heat-treated iron-ore pellets, and use of alcohol by-product for inhibition of emission of solid particles // 2532771
FIELD: metallurgy.SUBSTANCE: group of inventions relates to an inhibition method of emission of solid particles, which is caused by friction of heat-treated iron-ore pellets at their movement, laying, loading and unloading. Glycerine obtained as a result of biofuel production is sprayed onto heat-treated iron-ore pellets removed from the furnace at the temperature of 200°C, and namely 500 g per ton of heat-treated pellets.EFFECT: reduction of costs.3 cl, 2 dwg
ethod of producing structured organomineral binder // 2529619
FIELD: chemistry.SUBSTANCE: method of producing structured organomineral binder includes at least one-time cavitational dispersion of a mixture of peat and water in ratio of 1:4-1:4.5, respectively. Dispersion is carried out until the mixture reaches temperature of 80-90°C, followed by cooling the mixture to room temperature to obtain the end product.EFFECT: preserving binding properties of the product for a long period of time during storage.

Pellet obtaining method // 2529140
FIELD: metallurgy.SUBSTANCE: method involves forming of scull on the bottom of a pelletiser, supply of wet charge by two flows, introduction of the first charge flow into the compressed gas flow providing for the generation of gas-wet charge jet, nucleation of the charge by spraying onto the scull by the gas-wet charge jet to obtain a dense layer of wet charge. The said dense wet charge layer is divided into nuclei by longitudinal plate blades, the scull is cleaned from nuclei by a rotating drum with ridges, the pellet shell is formed by extra pelletising of the said nuclei by second flow charge to obtain pellets. The section of the dense charge layer of constant thickness is formed so that the thickness is equal to 0.7-0.8 of the layer diameter, it is done by the separation of the upper curvilinear part of the layer from the whole dense layer with the help of a profiling separator set above the charge scull with a gap. The remaining border parts of the dense layer are destructed by inclined plate blades. Through holes are provided in the plate blades, ridges and the separator.EFFECT: improved strength and uniformity of structural properties of pellets.2 dwg, 1 tbl

Complex processing of martite-hydrohematite ore // 2521380
FIELD: mining.SUBSTANCE: proposed process comprises ore screening, magnetic separation to obtain magnetic and nonmagnetic fractions, grinding, hydraulic classification, thickening and drying. Martite ore is first subjected to screening with separation to three size classes, i.e. coarse, intermediate and fine. Coarse class is directed to sensory separation to obtain tails and concentrate to be additionally ground and screened to intermediate and fine classes. Intermediate class is conveyed to metallurgical processing while fine class is subjected to pelletising. Hydrohematite ore is first subjected to screening with separation to three size classes, i.e. coarse, intermediate and fine. Coarse class is directed to sensory separation to obtain tails and concentrate to be additionally ground and screened to intermediate and fine classes. Intermediate class is conveyed to metallurgical processing. Portion of fine class is directed for pelletising while another portion is directed to magnetic separation, its magnetic fraction is fed for pelletising. Nonmagnetic fraction is ground with mixing by grinding medium and directed to hydraulic classification of the first stage. Classification sands are returned to the mill. Sink is fed to second stage of classification, its sink being used as 3rd grade pigment after thickening and drying. Sands of second classification are fed to second stage of grinding with mixing by grinding medium. Product ground at second stage is subjected to 3rd stage hydraulic classification, its sands being dried and used as 2nd grade pigment. Thereafter, sink is thickened, dried and used as 1st grade pigment.EFFECT: simultaneous production of several grades of iron oxide pigment and finished stock for metallurgy.2 cl, 1 dwg, 1 tbl
Binder for production of metallurgical and coal briquettes // 2518024
FIELD: metallurgy.SUBSTANCE: proposed binder comprises organic polymer composed by polymer sodium- and polyalkylene oxide derivative of polymethylene-naphthalensulfonic acids and additive glycosides. Ratio of said components is as follows (in wt %): polymer sodium- and polyalkylene oxide derivative of polymethylene-naphthalensulfonic acids - 30-80 and additive glycosides - 20-70. Quantity of links in polyalkylene oxide chain is n=5÷25. Note here that polymer sodium- and polyalkylene oxide derivative of polymethylene-naphthalensulfonic acids is produced by condensation of sulfonic acid of naphthalene with formaldehyde while additives of glycoside derivatives represent fructosides, glucosides, galactosides or the mix thereof.EFFECT: high-temperature durability and mechanical strength.4 cl, 2 tbl

ethod of thermal treatment of pellets // 2515775
FIELD: metallurgy.SUBSTANCE: method includes laying a layer of moist pellets onto a conveyor belt of a trough-shaped section, profiling a layer of pellets according to the cross section shape in the conveyor belt, resting with side surfaces at inclined roller supports and a central part resting onto horizontal roller supports and arranged in a heat insulation hearth with realisation of partial drying by heated air supplied by a fan via a blowing box. Then pellets are sent to a fire grate of an annealing machine for final thermal treatment. At the same time the blowing box is divided at least into three sections, air temperature in the first section is maintained up to 300°C, and in subsequent sections the air temperature is increased by 0.5-1.5°C per each metre of the conveyor belt length. In the central part of the conveyor belt resting against horizontal roller supports, they perform longitudinal holes with length of more than two diameters of pellets and width, not exceeding half of diameter of the pellets arranged in staggered order along the above conveyor belt, and the conveyor belt is heated.EFFECT: invention makes it possible to reduce fuel consumption for thermal treatment of pellets.3 dwg, 1 tbl, 1 ex

Synthetic composite charge material for production of high-quality steel // 2514241
FIELD: metallurgy.SUBSTANCE: invention relates to ferrous metallurgy and may be used for steel production in arc steel furnaces. Proposed material contains iron-carbon alloy, carbon-bearing substance and iron-bearing oxidised component including iron oxide (Fe2O3) and iron monoxide (FeO) at the following ratio of components in wt %: iron monoxide - 5-30, iron oxide - 0-10, carbon-bearing substance - 0.1-5, iron-carbon-alloy making the rest.EFFECT: power savings, accelerated process.1 tbl, 3 ex

ethod for obtaining briquette to obtain titanium- and zirconium-containing cast iron // 2510684
FIELD: metallurgy.SUBSTANCE: invention relates to metallurgical, casting production, and namely to production of cast irons operating under abrasive wear conditions. The method involves preparation of a mixture of initial material with further moulding. As initial material, crushed metal chips and metal scrap in the form of scale and scrap of ferrous metals, which are mixed with cryolite, and zircon and ilmenite concentrate, are used. Water solution (40%) of glyoxal is used as the binding agent. Components of the briquette are contained in the following ratio, wt %: metal chips and metal scraps in the form of scale and scrap of ferrous metals - 60, cryolite - 20, zircon concentrate - 7.5, ilmenite concentrate - 7.5, water solution (40%) of glyoxal - 5. The obtained mixture is homogenised by mixing, formed into a briquette by pressing and dried during 3 hours at 80°C.EFFECT: according to the invention, use of briquettes will allow increasing wear resistance of the obtained cast iron.2 cl, 2 dwg, 2 ex
 
2551011.
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