Restoration mixture for melting of ferrosilicon |
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IPC classes for russian patent Restoration mixture for melting of ferrosilicon (RU 2380440):
  
 Tank-casting mould of installation for receiving of ferrotitanium by means of electroarc melting of rutile under layer of protective flux / 2377325
Invention relates to metallurgy field, particularly to structure of tank- casting mould of electroslag installation for receiving of ferrotitanium. Tank- casting mould contains metallic square casing, in the basis of which it is hermetically installed stationary current-carrying electrode, between main, side walls and fixed current-carrying electrode there are installed plates, which formes fireproof brickwork of tank- casting mould and implemented as graphitic, herewith part of graphitic plates at side steel walls is held by means of top holding brackets and bottom holding brackets, and fireproof products, which are located under mentioned plates, are manufactured from chamotte, and to four side steel walls there are rigidly fixed four horizontally installed rotary loops, which provide lowering of side steel walls into horizontal position for free unloading of ferrotitanium in solid condition lengthwise side steel walls.
 Method of combined processing of oxided and carbonate ferromanganese ores / 2374350
Invention relates to the ferrous metallurgy field, particularly to manufacturing of ferroalloys, particularly to creation of methods of combined processing of oxided and carbonate ferromanganese ores with receiving of manganese ferroalloys. Method includes separate preliminary enrichment of mentioned ores with receiving of oxide and carbonate concentrates, fractionating, separation of large and agglomerating of undersize particles, smelting from them low-phosphorus dross (LPD), received from carbonate concentrates, and low-phosphorus dross (LPD), received from oxide concentrate, usage of the latter at smelting of carbonaceous ferro- and silicon manganese, herewith smelting of carbonaceous ferromanganese is implemented by flux-free process with usage in the capacity of crude ore of carbonate concentrates and low-phosphorus dross (LPD) with receiving of charge manganese slag, and melting of silicon manganese is implemented from charge, consisting of charge manganese slag from smelting of carbonaceous ferromanganese, low-phosphorus dross (LPD), quartzite and carbonaceous reducer.
 Method of smelting of vanadium-bearing alloys / 2374349
Invention relates to the ferrous metallurgy field, particularly to manufacturing of ferroalloys, particularly to creation of methods of smelting of vanadium-bearing alloys by out-furnace aluminothermal process from vanadium slags. In method it is implemented preparation of charge containing vanadium-bearing component and aluminium, partial or total its loading into melting hearth, ignition of charge, reduction of charge oxides by aluminium, isolation of melts, discharge of slag and cooling of vanadium-bearing alloy. In the capacity of vanadium-bearing component it is used converter vanadium slag, at preparation into content of charge it is introduced mixture of lime and magnesite in amount 5-20% of weight of introduced aluminium at keeping in it ratio of calcium oxide to magnesium oxide in the range 1:(1-0.5), herewith all charge before loading into melting hearth is heated up to temperature 200-550°C.
 Reprocessing method of manganous waste slags / 2374336
Invention relates to the ferrous metallurgy field, particularly to reprocessing of waste slags from manufacturing of manganese and siliceous ferroalloys for extraction from it of manganese and siliceous ferroalloys of high grade by content of phosphorus. In method there are mixed manganous waste slags and slag from manufacturing of ferrosilicon and is implemented reduction of oxides of manganese and silicon carbide, presenting in slag from manufacturing of ferrosilicon, herewith amount of silicon carbide in mixture of slags for 10-50% more than it is required by stoichiometry for total reduction of manganous oxide.
Method of receiving of vanadium-bearing alloys and ligatures / 2368689
In method in the capacity of charge it is used vanadium-bearing wastes and lime, herewith in oxidising area it is implemented separation of metal from vanadium-bearing melted slag with periodic or continuous discharge of it from furnace. It is implemented reduction of vanadium oxides from melted slag in reducing zone by introduction into melt of silicon-bearing alloy with acceptable content of aluminium 2-15%, taken in amount for 2-50% more than stoichiometrically necessary for reduction vanadium oxides.
 Multi-component reducing mixture for melting of ferrosilicium / 2366740
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.
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 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: restoration mixture consists of coke nut, cannel coal of grade D with yield of volatiles more than 40% porosity more than 15% and with increased filtering property, and wood chips in the capacity of ripper in following mass ratio of components, % (by carbon): cannel coal of grade D 25-55, wood chips 5-7, coke nut is the rest. EFFECT: invention provides development of restoration mixture with increased filtering property for silicon single-oxide. 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, such as lean or low-caking[1, 2, 3]. However, the coke residue not all types of coal can catch the silicon monoxide from the flue gas. The disadvantage of such mixtures is low filtration capacity, which affects the degree of extraction of silicon in the alloy. The objective of the invention is to develop a recovery mix, with increased filtration capacity for silicon monoxide. The task is solved in that in the proposed restoration of a mixture of coke, nut and coal, as filter components introduced long-flame coal (grade D with the release of volatile over 40% and a porosity of more than 15%, and as a cultivator of the charge put wood chips in the following mass ratio (carbon), %: - long-flame coal - 25-55; - wood chips-5-7; - coke nut - rest. The essence of the invention lies in the use of fossil fuels brand D with the appreciation is authorized by the porosity of the coke residue. The essence of the invention lies in the use of fossil fuels brand D with increased porosity of the coke residue, which provide for the recovery of silicon monoxide from the flue gas. In the heating process for the long-flame coal from it releases a significant amount of volatile substances in the form of hydrocarbons, which protect from burning wood chips. Wood chips in a reducing atmosphere turns into charcoal. Restorative mixture consisting of coke, nut (58-70%), coal (grade D (25-35%) and wood chips (5-7%) on carbon tested in the production of high-silicon ferrosilicon brand FS for industrial furnaces with a capacity of 20-29 MVA. The application of the proposed restoration of the mixture can increase the productivity of the furnaces 8.6-11.4%, and to reduce specific energy consumption by 9.4-10.9%and increase the recovery of silicon in the alloy 1.8-2.1 per cent. Proposed rehabilitation mixture tested in industrial conditions and proposed for introduction on 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, MCL2SS 7/00, bull. No. 37, publ. 05.10.76, 2. As the USSR №755875, MCL3SW 5/10, bull. No. 30, publ. 15.08.80, 3. RF patent №2236481, IPC7SS 33/04, bull. No. 26, publ. 20.04.04, Restorative blend for smelting ferrosilicon, characterized in that it contains coke nut, long-flame coal (grade D with increased filtration capacity, volatile over 40% and a porosity of more than 15%, and wood chips as a Ripper in the following mass ratio of components, % (carbon):
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