Multi-component reducing mixture for melting of ferrosilicium |
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IPC classes for russian patent Multi-component reducing mixture for melting of ferrosilicium (RU 2366740):
  
Charge mixture for production of ferroniobium by way of electroslag remelting / 2364651
Invention relates to metallurgy immediately dealing with electroslag remelting. The charge mixture contains the following components (wt %): wastes of production of pure niobium 62.0-70.0 containing niobium intermetallide (NbAI3) - 40.0-45.0%; iron scale - 20.0-28.0%; a slag-forming constituent - 1.0-6.0%; alabaster - 1.0-12.0%. The pure niobium production wastes contain the following components (wt %): niobium intermetallide - 40.0-45.0%; metallic niobium - 10.0-20.0%; alumina - 5.0-25.0%; impurities - balance.
High-strength nonmagmetic composition steel / 2360029
Invention relates to metallurgy field, particularly to composition of high-strength non-magnetic corrosion-resistant composition steel, used in mechanical engineering, aircraft building, special shipbuilding, instrument making and at creation of high-performance drilling engineering. Steel contains carbon, silicon, manganese, chrome, nickel, nitrogen, niobium, molybdenum, vanadium, zirconium nitride, iron and unavoidable admixtures at following ratio of components, wt %: carbon 0.04 - 0.12, silicon 0.10 - 0.60, manganese 5.0 - 12.0, chrome 19.0 - 21.0, nickel 4.0 - 9.0, molybdenum 0.5 - 1.5, vanadium 0.10 - 0.55, niobium 0.03 - 0.30, nitrogen 0.4 - 0.7, zirconium nitride 0.03 - 1.00, iron and unavoidable admixtures are the rest. Zirconium nitride is in the form of particles with nano-dispersibility.
Method of receiving of chrome-bearing alloy / 2354735
Invention can be used for processing of chrome ore, concentrates and aluminium-bearing wastes of non-ferrous metallurgy. In the method in the capacity of aluminium-bearing material it is used preprepared aluminium-bearing wastes from manufacturing of secondary aluminium in amount 0.6-1.1 wt % per 1 wt % of content Cr2O3 in chrome-ore concentrate. Isolation of received in furnace melt is implemented with blending during 10-15 minutes, after which it is preliminary pumped out in slag pan 70-90% of dross major part from the total dross mass, then it is pumped out part of the rest slag into metallic reservoir, isolated during 3-5 minutes and discharged the rest part and metal to the same metallic reservoir.
 Extraction method of metallic element, particularly metallic chromium, from charge containing metal oxides in arc furnace / 2352672
Invention relates to extraction method of metallic elements, particularly, metallic chromium from slag, which contains oxides, particularly chrome oxide, in arc furnace. Additionally slag is not reduced at separated stage after melting, but there are implemented following stages: after charge introduction into arc furnace it is melted, forming molten metal and slag. Melt is discharged, keeping unreduced slag in furnace. Then it is fed following scrap portion, including reducers for slug. At melting of this charge slag is reduced. Then slag and melt are merged. Method can be used also in aggregates of ladle or convertermetallurgy.
Method of receiving products made of iron with carbon alloy / 2352671
There are received products from alloy of iron and carbon with carbon content more than 2.14 wt % by means of melting, melt heating till the temperature for 400-600°C higher of eutectic temperature, isolation at this temperature no less than 10 minutes, ingot plastic deformation at the temperature higher than 600° and following cooling till the ambient temperature in water. Sulfur content in alloy is provided, not exceeding 0.001 wt %, phosphorus - not exceeding 0.01 wt %.
Melting method of ferrotitanium / 2351678
Invention relates to metallurgy field. Particularly it relates to production of ferroalloys by aluminothermy process. In the method in the capacity of titanium-bearing raw material it is used liquid titanic slag, it is mixed metallothermic part of charge, consisting of iron-ore concentrates, aluminium powder, lime and ferrosilicium in relation 1:(1.09-1.18):(0.27-0.33):(0.08-0.09) agreeably, in amount 126-146% of titanium slag mass, then it is mixed and penetrate main part of charge, consisting of iron-ore concentrate, lime and aluminium powder in relation 1:(0.1-0.29):(0.43-0.46) agreeably, in amount 15-25% of titanium slag mass. In the capacity of titanium-bearing raw material it is used liquid titanic slag with content 85-95% % TiO2 at temperature 1700-1850°C.
 Method of concentrates treatment from ore, containing oxides of ferric, titanium and vanadium and facility for its implementation / 2350670
Method is implemented by means of liquid-phase recovery of metals from oxides of concentrate batches, consisting of main and additional parts, in conditions of melt revolution by electromagnetic field. During the melting it is effectively used centrifugal effect, accelerated fused fed for melting charge, containing concentrate, and in it there are selectively recovered metals from oxides. At that likewise accelerated iron is diluted in aluminium while production of ferroaluminium. Method is implemented almost excluding gas emission from melt. Facility for method implementation is outfitted by collector circulating ferrosilicium that simplifies process of charge treatment, reduces treatment time of each regular charge batch. Under the bottom of circulating ferrosilicium collector there are located induction units which are equal in structure to induction units, located around walls and under the bottom of assembly that provides decreasing of costs for induction units manufacturing and for electricity supply.
Method of manganese ore reducing fusion / 2348727
Invention concerns pyrometallurgy. Particularly it concerns production of ferromanganese, and provides excluding of formation of dump waste slag at extraction of manganese from ore. In method it is implemented forming in furnace of reactionary capacity on the basis of fluorite melt, charging and reducing fusion of manganese ore, discharge from furnace of slag and ferromanganese. Before discharge from furnace of slag and ferromanganese into reactionary capacity it is add manganese ore in amount, depending on content of manganese in ore, content of manganese in slag and slag mass in furnace, till the receiving of slag with content 10-20% of manganese, used for preparation of welding flux.
 Charge for melting of high carbon ferromanganese / 2347835
Invention refers to metallurgy, particularly to processing of manganese raw material by melting in ore reducing furnaces. Charge contains manganese raw material, carbon reducer and flux. As manganese raw material there is used mixture of concentrate of rare phosphorous manganese ore with ratio P/Mn=0.0052-0.042 and high grade manganese ore with ratio P/Mn≤0.0021 at following ratio of components, wt %: carbon reducer 12-18, flux 8-20, concentrate of rare phosphorous manganese ore with ratio P/Mn=0.0052-0.042 5-40, high grade manganese ore with ratio P/Mn≤0.0021- the rest. The invention facilitates processing low grade native manganese containing materials.
 Method of electroslag melting of ferrotitanium / 2346994
Invention refers to special electrometallurgy and is designed for production of ferrotitanium of high quality out of titanium and steel chips. Melting of titanium and steel chips is performed in a slag bath in a water-cooled crystalliser by means of supply of electric current into slag through a non-consumable graphite electrode. Chips are loaded into the crystalliser by portions at amount of 20-50% from the total weight of chips. After melting of each portion of chips density of current is lowered at the electrode at 50-70% relative to density of current of melting and holding is carried out at lowered current density during 1-5 minutes. Further next portion of chips is melted.
 Method of regeneration of metallic chromium from slags containing chromium oxide / 2247161
Proposed method is used for converter processes such as AOD, MRP, AOD-L, MRP-L, CLU, ASM, Conars-Stainless steel, or vacuum processes such as VOD, SS-VOD, RH and RH with use of oxygen lance. Slag formed at the end of blowing and treatment in converter or vacuum plant is drained and removed in unreduced state; this slag is fed to electric furnace which is loaded with standard charge consisting of metal scrap and residual dust; then carbon is additionally fed and silicon if necessary; during melting, chromium oxide contained is slag is reduced by means of carbon and silicon.
 Method of production of complex siliceous ferro-alloy / 2247169
Proposed method includes loading the furnace and fusion of charge containing quartzite and briquetted blend of ore part of charge with excessive carbon reductant required for reducing the main elements at lack of reductant in charge. Reduction intensifying agent and wastes of process are additionally introduced into blend for briquetting of ore part of charge with carbon reductant; wastes have form of ferro-alloy at size lesser than 1 mm, slag and sublimates in the amount of 2-10% and 1-15%, respectively. Used as intensifying agent are copper and nickel sulfides and/or oxides, borate ore and fluorspar.
 Method for producing ferrosilico-aluminum in ore heating furnace / 2251586
Method comprises steps of using coal -containing rock with carbon content 5 -35 % as silicon- and aluminum-containing material. Melting is realized while keeping during process lack of carbon in charge loaded to furnace in range consisting 3 -12% of stoichiometric quantity due to adding coke and (or) quartzite to coal containing rock. Invention provides stabilized process of melting out silicon-aluminum alloys with aluminum content 5 -35%.
Method of alumino-thermal production of ferro-niobium / 2258095
Proposed method includes stage-by-stage loading and melting of charge containing niobium concentrate, sodium nitrate, lime, iron ore, aluminum and drainage products of melt; used as niobium concentrate is commercial niobium concentrate. At first stage, charge is loaded at rate of 300-380 kg/m2/min; this charge contains total mass of commercial niobium concentrate and sodium nitrate, 30-70% of iron ore of mass of melt, 20-80% of lime of mass of melt and aluminum in the amount of 0.85-0.99 of amount stoichiometrically required for reduction of elements of ferro-niobium alloy; at second stage, charge is loaded in the amount of 35-55% of mass of niobium pentoxide in commercial niobium concentrate of first stage at rate of 210-270 kg/m2/min, 30-70% of iron ore of mass of melt, 20-80% of lime of mass of melt and aluminum in the amount of 1.6-2.0 of amount stiochiometrically required for reduction of elements of ferro-niobium alloy; before draining, melt is held during period equal to 0.1-0.6 of charge melting time.
 Pyro-metallurgic plant for concentration of titanium-silica concentrates / 2258759
Plant has transport means and device for forming current-conductive channel, made in form of cylinder with radial ribs, inner diameter of which is equal to two diameters of electrode, and mounted at furnace bottom. Graphite-covered electrode is mounted in furnace body coaxially with relation of inner furnace diameter to electrode diameter equal to 2 : 8, while furnace body is made in form of water-cooled crystallizer, is mounted on transporting means and connected to minus, and electrode - to plus of direct current power block. Radial plates of means for forming radial current-conductive channel are rigidly connected to cylinder, while length of two radial plates plus outer diameter of cylinder match inner diameter of furnace.
 Method for concentration of titanium-silica concentrates / 2258760
Method includes melting in water-cooled crystallizer, into which at bottom a layer of non-electric-conductive source material is placed and in the center of it a channel is formed with diameter approximately equal to two electrode diameters, which is filled by current-conductive material. After that crystallizer Is connected to minus, and electrode with plus of direct current power block and electrode is lowered until touching current-conductive material until appearance of stable arc, and after start of crystallization of titanium slurry main working period is begun - accumulation of slurry block, during whole period of which periodically before end of melting portion loading of material of given compound is performed. Current-conductive material is formed by adding to source material not less than 33% of breeze coke from mass o source material.
 Method of obtaining ingots of initial alloy for production of amorphous bands / 2260070
Proposed method includes melting of main charge, introduction of alloying elements, complete melting, cooling to pouring temperature and pouring to ingot mold from above. Main charge contains waste amorphous band of the same composition in the amount of 5-80 wt-% of mass of charge at bulk mass equal to 18-20% of density of initial alloy. Proposed method makes it possible to reduce amount of nonmetallic inclusions in ingots, to avoid choking of calibrated nozzle and to reduce action of melt on quartz crucible. Yield of good amorphous bands is increased from 52.6% to 79.3-87% and consumption of quartz crucibles is reduced by 50%.
Method for thermal melting of metal / 2269585
Method involves preparing burden mixture; charging burden mixture into melting crucible of reaction chamber; creating low pressure in reaction chamber and initiating reaction process; providing melting simultaneously under low pressure in reaction chamber and under pulsing pressure in crucible melting space, said pressure in crucible being created by accumulating and periodic discharging through crucible cover into reaction chamber space of gaseous melting process products. Weight of cover is selected on condition that desirable working pressure may be created in crucible melting space. Melting process is conducted under low pressure of 10-5 - 600 mm of mercury column in reaction chamber and under gas pressure of 0.1-10 atm in crucible.
Method of smelting of ferroaluminum with the reduced consumption of the pure aluminum / 2272851
The invention is pertaining to the field of metallurgy, in particular, to the versions of smelting of ferroaluminum used for a steel deoxidation. In the first version the process of smelting of the ferroaluminum is conducted in two separate induction furnaces by separate melting of the steel and aluminum scrap at the temperature exceeding the fusion point of the each particular scrap by 50-70°C, tapping of the melt of aluminum with a fluidic protecting slag into the induction furnace containing the melt of the steel, heating of the melts within 5-10 minutes up to their complete stirring. In the second version the process of the ferroaluminum smelting is conducted in two induction furnaces by the separate melting of the aluminum scrap and the steel scrap, which is added by batches in amounts determined by the charge smelting process to the residual smelt, remained after the previous smelt of the ferroaluminum, tapping of the aluminum melt with the fluidic protecting slag into the induction furnace containing the melt of ferroaluminum with the low content of aluminum, heating within 5-10 minutes up to the complete stirring. The invention ensures reduction of consumption of the pure aluminum into the melting loss up to 6 %, a decrease of the duration of the smelting process by 2-2.5 hours with the corresponding growth of the volumes of the production.
 Low hood of an open ore regenerating electric furnace / 2272976
The low hood of an open ore regenerating electric furnace has a lid, lateral walls and a mobile screen. On the lid it has openings for current inputs and leaking pipes. On lateral walls it has intaking windows of gas conduits and branch pipes for feeding blast-furnace gases with overlapping of the gap between the flange of the furnace and the lateral windows of the hood with a mobile screen. The hood is fulfilled in the shape of a stepped pyramid with lateral walls of a smaller diameter and a mobile screen of a larger diameter; the intaking windows of the gas conduits of rectangular cross-section are placed tangentially and directed relatively to each other at 1800.
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FIELD: metallurgy. SUBSTANCE: invention refers to iron and steel industry, particularly to production of ferroalloys by carbothermic reduction. Reducing mixture contains coke nut, brown coal of B grade with the lower heat of working fuel combustion equal to 3200 kcal/kg and working moisture contents up to 40 %; as loosening substance the reducing mixture contains cannel coal and wood chips at following ratio, % (for carbon): cannel coal 25-50, brown coal of B grade 14-20, wood chips 2-5, coke nut - the rest. EFFECT: possibility to develop multi-component reducing mixture of lowered caloric value. 1 tbl
The invention relates to the field of ferrous metallurgy, namely the production of ferroalloys uglehimicheskiy recovery. As the carbonaceous reductant is used primarily coke nut. Known restorer for plateresco process, consisting of coke, nut and coal, for example skinny, low-caking or flame[1, 2, 3]. However, not all types of coal suitable for effective use as a reductant due to their material composition and physico-chemical properties. The disadvantage of using coal in a reducing mixture is a high level NCV working fuel for all grades of coal (a, T, SS, and D) is within 5200-6500 kcal/kg High calorific value of coal reduces the resistance furnace equipment, adversely affects the mode of coking samebecause electrodes. This leads to an increase of the hot furnace downtime and loss of productivity. The objective of the invention is to develop a restorative mixture with a lower calorific value. The task is solved in that in the proposed restoration of a mixture of coke, nut and coal, as a low-calorie component introduced brown coal grade B with Issa heat of combustion of the working fuel 3200 kcal/kg and the content of the working moisture up to 40%, and as a cultivator of the charge introduced long-flame coal and wood chips in the following mass ratio of components, % (carbon): - long-flame coal - 25-50; - brown coal - 14-20; - wood chips - 2-5; - coke nut - rest. The essence of the invention lies in the use of brown coal grade B with a low heat of combustion, which reduces the calorific value blast furnace gas. The original coal of grade B are composed of up to 40% moisture, which is easily removed by heating the cooling surface of the furnace and reducing the temperature of the resulting flue gases. Increases resistance furnace equipment, increases the turnaround time. The coking zone of the electrodes is moved to the optimum level to the middle contact of the cheeks. Restorative mixture consisting of coke, nut (25-70%), coal (grade D (25-50%), coal (grade B (14-20%) and wood chips (2-5%) on carbon tested in the production of high-silicon ferrosilicon brand FS for industrial furnaces with a capacity of 20 MVA. The application of the proposed restoration of the mixture can increase the performance of stoves 3.2-5.5%, and to reduce specific energy consumption by 3.5 to 5.7%, increase the recovery of silicon in the alloy of 1.2-1.6% Proposed rehabilitation mixture tested in industrial conditions and p is Elagina to implementation Ferroalloy plants in the smelting of ferrosilicon. The main results of the bottoms of ferrosilicon brand FS presented in the table.
Sources of information 1. As the USSR № 530909, M CL2C2C 7/00, bull. No. 37, publ. 05.10.76, 2. As the USSR № 755875, M CL3SW 5/10, bull. No. 30, publ. 15.08.80, 3. RF patent № 2236481, IPC7SS 33/04, bull. No. 26, publ. 20.04.04, Multicomponent rehabilitation mixture for smelting ferrosilicon containing coke nut, brown coal grade B with the lowest heat of combustion of the working fuel equal to 3200 kcal/kg, and the content of the working moisture up to 40%, as is the quality of the Ripper - long-flame coal and wood chips in the following mass ratio of components, % (carbon):
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