Method of depleting slags from smelting of oxidized nickel ores |
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IPC classes for russian patent Method of depleting slags from smelting of oxidized nickel ores (RU 2244028):
          
 The method of processing slag or slag mixtures / 2238331
The invention relates to metallurgy, in particular to a method of processing steel slag or mixtures thereof
 The method of removal of chromium and/or nickel from a liquid slag / 2237732
The invention relates to metallurgy, in particular to a method for removal of chromium and/or Nickel slags
 The electric furnace for slag processing / 2235255
The invention relates to the field of non-ferrous metallurgy, in particular to the design and operation of ore-thermal furnaces with immersion of the electrode in the slag melt, and can also be used in ferrous metallurgy and chemical industry
 Method for processing of oil-containing briquettes chip active refractory metals and alloys and device for its implementation / 2234547
The invention relates to the field of metallurgy active refractory metals and alloys, including rare earth and actinides, in particular to methods of processing of oil-containing briquettes chips of the above metals and alloys and devices for their implementation
 A method of processing a nickel converter slag nickel complexes / 2230806
The invention relates to ferrous metallurgy and is intended for enterprises engaged in the processing of oxidized Nickel ores
A method of processing slag from steel production / 2226220
The invention relates to a method for processing slag from steel production and, in particular, iron-containing materials, such as furnace slag, BOF slag, dust from steel production, scale rolling mills or waste-ferrous secondary metals, in which the molten slag from steel production, respectively, iron-containing material is mixed with chrome ores or chromium - and Nickel-containing the dusts to establish the slag basicity of 1.2-1.6, and the temperature of the bath is supported above 1600
 With, mainly in the range of 1600-1800With, and introducing carbon-containing a bath of liquid iron or form it
A method of processing metallurgical slag dump / 2222619
The invention relates to metallurgy, specifically to the technology of processing of metallurgical slag dump, mainly electrometallurgical production, and can be used to extract magnetic, weakly magnetic and non-magnetic components from these materials
The method of obtaining aluminium coagulant / 2220908
The invention relates to the field of inorganic chemistry, to the means of obtaining aluminum compounds containing chlorine
 A method of processing titanium containing slag / 2215053
The invention relates to ferrous metallurgy, in particular to methods for processing of such raw material for titanium pigment titanium dioxide
 Method of depleting slags from smelting of oxidized nickel ores / 2244028
Claimed method comprises combining slags using extraction principle with number of extractions n approaching infinity. Depleting agent efficient in presence of reducing agent is selected from materials enriched with pyrite, pyrrotine, calcium sulfide, and calcium sulfate; metal and alloys mainly containing Si, Al, Fe, C, etc. as well as reducing and sulfidizing complexes consisting of sulfides, oxides, and reducing substances (C, Me). Carbonaceous reducers, utilized individually or in mixture, are any known carbonaceous reducers. Degree of metal Me recovery is in accordance with conventional extraction equation.
 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.
 Step crushing process for regeneration of noble metals of slag / 2251581
Method comprises steps of multiple crushing for producing at each step slag particles with successively decreased (from step to step) diameters; repeating crushing steps until producing particles with desired final size of their diameter; suspending crushed particles of slag in liquid medium after each crushing step; using slag produced after coal combustion in fire box or in boiler; performing steps of suspending for producing suspension with light and heavy particles, the last include noble metals; separating crushed particles in suspension on base of their mass and individually concentrating light particles and heavy particles; after each suspending step removing light particles from suspension for preparing suspension containing, mainly heavy particles; then trapping heavy particles for further crushing of them in order to produce desired final size of particle diameter.
Charge for depletion of nickel-cobalt converter slags / 2258754
In order to reduce losses of cobalt and nickel with refuse slags and to increase recovery of valuable components into matte, charge containing sulfidizing agent, marble crumb (6-10%), and coke (15-25%) further contains 2 to 20% of aluminum-containing slag obtained in secondary aluminum processing.
 Method of preparation of samples of metallurgical slags for chemical analysis / 2263151
Proposed method includes grinding the slag sample, mixing and reducing sample mass which are performed at seven stages. First stage includes grinding the slag sample. Second, third, fourth, sixth and seventh stages includes grinding, mixing and reducing sample mass to required magnitude. Fifth stage includes drying and cooling the sample. Prior to first, second, third and fourth stages, metallic inclusions are manually removed. At fourth, sixth and seventh stages metallic inclusions are removed by screening in sieves between grinding operations.
 Method of processing vanadium-containing converter slag / 2266343
Proposed method includes roasting of slag with reaction additive, leaching-out cinder by soda solution for obtaining vanadate solution and separating vanadium oxide from it. At roasting, waste slag of vanadium process is introduced as reaction additive; waste slag contains hematite and manganese oxide at mole ratio of vanadium to manganese equal to 1:1. Roasting is performed at 800-850°C for 3 h; leaching-out is carried out with soda solution at mole ratio of V2O5:Na2CO3 equal to 1:1.2-1.8 including filtration of sodium vanadate solution and flushing the sediment with water. Vanadium and sodium are separated from solution thus obtained by electrochemical treatment in membrane system, sorption or neutralization by sulfuric acid followed by sedimentation of polyvanadium acid salts.
 Method for pyrometallurgical processing of non-ferrous ores and concentrates for producing of matte or metal and flow line for performing the same / 2267545
Method involves melting with the use of oxygen-containing blast gas; converting; depleting slag in gasifier; reducing gases from melting process and converting with hot gases from gasifier. Oxygen-containing blast gas used is exhaust gas of energetic gas turbine unit operating on natural gas or gas generating gas from coal gasification. Gas used for gas turbine unit is gas generating gas from bath coal gasification produced on slag depletion. Flow line has melting bubbling furnace, converter, gasifier for slag depletion, gas turbine unit with system of gas discharge channel connected through branches with tuyeres of melting furnace, converter and gasifier. Each of said branches is equipped with pressure regulator and flow regulator.
 Method of conversion of the metalothermic slag / 2274668
The invention is pertaining to the field of nonferrous metallurgy, in particular, to the metallothermic processes. The method of conversion of the metallothermic slag (4), especially of aluminothermic slag, silicothermic slag or their combinations is conducted in the process of reduction of the non-ferrous metals: V, Ni, Nb, Cr, Mo, Tt, Ti, W under action of the fluxes (5), which are added onto the surface of the metallothermic charge (2) prepared to be set on the fire before their own metallothermic reaction and-or after completion of the indicated reaction onto the surface of originated slag (4). At that there is a layer (6) of the reacted fluxes and slag. The originated layer (6) contains the fusible eutectics of the fluxes (5) and the slag. The fluxes (5) may be added onto the surface of the originated slag (4) after the metallothermic reaction within 20 minutes interval beginning from the indicated reaction completion, but predominantly within the limits of 5-10 minutes after completion of the indicated reaction. The fluxes(5) are added in the amount of 40 mass %, predominantly within the limits of 20-30 mass % in turms of the total mass of the metallothermic charge. The fluxes (5)are differ in sizes of the particles beginning from the size of the dust particle up to the maximum size of the grains of 100 mm and predominantly are within the limits of 10-30 mm. The fluxes (5) are batched on the surface of the metallothermic charge (2) and-or on the surface of the originated slag (4) simultaneously. The technical result of the invention is the change of the slag elemental composition so, that the slag is suitable for the further treatment without the losses of the metals.
Method of leaning converter slag of nickel-cobalt process / 2283880
Proposed method includes reducing-sulfidizing melting in heated unit in presence of sodium sulfate sulfidizing agent. Converter slag is leaned in any heated unit at temperature of from 1350°C to 1500°C. Sodium sulfate is introduced into melt in the amount of 10 to 12%; carbonic reductant is introduced in the amount of 13-15% of mass of slag being leaned. Viscosity of melt and mass of slag are reduced due to reduced melting point.
 Titania-containing slag processing method / 2295582
Titania-containing blast-furnace slag processing comprises melting metallic substrate in melting chamber of melting unit, making substrate rotate by means of electromagnetic field generated by MHD-device of melting unit, forming parabolically shaped recess in the substrate, adding a portion of slag into recess, melting slag by electromagnetic energy transmitted to the slag through substrate, reducing metals, and melting them together with substrate metal. Reduction of titanium and other metals from their oxides having free energy lower than that of aluminum is effected in molten portions of slag with aluminum or ferroaluminum. These reduced metals contribute to metallic substrate. Thereupon, a fresh portion of slag is introduced into melting unit and titanium incorporated in the substrate reduces metals from their oxides contained in the fresh slag portion and having free energy lower than that of titanium. Titanium-reduced metals are melted together with metallic substrate and a predetermined amount thereof is poured out. The rest of metallic substrate is replenished with titanium reduced from slag phase with aluminum. Titanium-containing alloy is poured out from melting chamber in predetermined amount, after which, keeping alloy remaining in chamber rotating, all processed slag is discharged. After the notch is closed, rotation of the rest of alloy is stopped, metal plug is formed in the notch, and a fresh portion of slag is supplied in controlled mode while gradually forcing liquid metallic substrate to rotate in order to form parabolically shaped recess therein. From molten portion of slag, a portion of silicon is then reduced with titanium, after which all operations are repeated.
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FIELD: nonferrous metallurgy. SUBSTANCE: claimed method comprises combining slags using extraction principle with number of extractions n approaching infinity. Depleting agent efficient in presence of reducing agent is selected from materials enriched with pyrite, pyrrotine, calcium sulfide, and calcium sulfate; metal and alloys mainly containing Si, Al, Fe, C, etc. as well as reducing and sulfidizing complexes consisting of sulfides, oxides, and reducing substances (C, Me). Carbonaceous reducers, utilized individually or in mixture, are any known carbonaceous reducers. Degree of metal Me recovery is in accordance with conventional extraction equation. EFFECT: increased degree of recovery of nickel from slags, reduced consumption of depleting agent, reduced power consumption and loss of sulfur into gas phase. 6 cl, 1 tbl
The invention relates to the metallurgy of Nickel, in particular to technology impoverishment of mine slag smelting of oxidized Nickel ores (NRO). It may be useful to depletion of toxins and melts from melting of predominantly Nickel, copper, lead, antimony, tantalum and other metals. Ways depletion toxins are very numerous and well known. Widespread ways flotation depletion rich slag Nickel and copper flash smelting [1]. However, the flotation method impoverishment to otvajnym the slag pit melting NRO not applicable. Widespread also electric furnace ways depletion rich slag Nickel and copper flash smelting [1, s-352; 2], as well as Converter slag Nickel smelting [2]. The closest in technical essence to our invention is a method of depletion mine slag melting NRO using mixtures of pyrite and Corsica, sulphide of calcium and Corsica [2, str-279]. Here the depletion of the slag is carried out in one phase and the slag enters the electric unit to the melt surface. Thus, depletion of the slag is carried out when the number of extraction "n"equal to one, the duration of stay of slag in the furnace for about 2 hours; maximum extraction of Nickel in matte (5.9 to 8.4% of Ni) was 38%; the specific consumption of electricity is - 85-130 kWh/ton of slag. The temperature of the slag - 1420-1480°C. Major disadvantages of this method are: low Nickel recovery; obtaining poor in Nickel matte, the use of pyrite and a high degree of desulphurization (>50%); high flow impoverish mix (2-6% by weight of slag). The present invention is to increase the extraction of Nickel from toxins in their impoverishment. Along with this there is a reduction of consumption impoverish agent, reduction of specific energy consumption, reduction of losses of sulfur in the gas phase. This object is achieved in that in the method of depleted slag smelting of oxidized Nickel ores, including siphon intake smelting products from the melting furnace in the anterior horn and the processing of slag impoverish agent containing sulfur-containing material and carbonaceous reducing agent according to the invention, the processing of the slag is carried out in counter-current by downloading impoverish agent on the surface of the directional moving upward flow of slag, with drops impoverish agent, falling down, kollektivet valuable components of the slag, through a counter-current movement, and the expense of impoverishing the support agent is 0.5 to 3.0% by weight of slag. Processing of the slag is carried out in a separate metallurgical unit, providing a continuous flow of slag and the furnace or hearth. As the sulfur-containing material impoverish agent can be used individually or in presence of each other materials enriched in pyrite, pyrrhotite, calcium sulfide, calcium sulphate, a metal reducing agents, mainly containing Fe, Si, Al. As impoverishing agents can be used restorative-sulfiding complexes (VSC) systems: FeS2-CaO-(caso3); FeS2-Fe2O3-C; FeS2-Fe-(CaSO4)-C; FS2-Fe-Cao(caso3)-S. As the carbonaceous reductant used individually or in mixtures with each other materials taken from the group consisting of metals toxic, sulphur petroleum coke, coal char, coal, including brown and skinny, anthracite, peat, peat coke. As materials-media SO4can be used not only natural gypsum, but also industrial waste (phosphogypsum, perhaps and others). The technical result to be obtained from using the proposed technical solution is: 1. Depletion of mine slag melting NRO using the principle of extraction with n (the number of extraction)tending to infinity. 2. The extraction method is depleted mine slag melting allows you to increase the extraction of Nickel from 87-90% (current state) to 95-97%. 3. Opertion is some depletion of Nickel smelting slag allows for process mining smelting almost any part of the Stein, until Feinstein. 4. Depletion of slag can be implemented without significant capital and operating costs. 5. Organization of mining smelting to matte containing Nickel is much more than 12%, reduces the consumption of sulfidization smelting, reducing fuel consumption and transition of sulfur in the gas phase. The essence of the invention consists in the following. Slag pit melting NRO undergo profound depletion of Nickel and cobalt. This can be done by filing impoverish agent to the molten slag, leaving the shaft furnace, in front of the furnace or a separate melting unit by countercurrent movement of the slag and impoverish agent. The degree of extraction of the metals (Me) this is in agreement with the classical equation of extraction:
where (IU)oand (Me)n- the concentration of Me in the source and destination slag, respectively; L - coefficient of the Me distribution between slag and matte (ferronickel); q - weight matte one extraction; Q - weight of slag; n is the number of extraction. Theoretical calculations using equation (1) showed that for values of n equal to 2, 3 and
Experimental verification of the above theoretical indicators was conducted in laboratory conditions (table). In the experiments used mine slag melting NRO on RISCOM Nickel plant composition, %: 0,13 Ni; 20,0 CaO; 12,4 MgO; 41,1 SiO2; 6,8 Al2O3; pyrrhotite from the dissociation of pyrite Gai concentrator, %: 44,0 Fe, 50 S; petroleum coke Perm refinery, %: 3,3 S; 7,8 volatile, 85, 0.3 ash. Depletion of slag were at a cost (units): slag - 100; pyrrhotite - 1,0; petroleum coke - 0.01 to 0.3. Stein from the second extraction was returned to the depletion of the original slag and matte from the third extraction in the head of the second extraction. Under these conditions, the following results were obtained: /tr>
The above experimental data fully confirm the results of theoretical calculations. We understand that the results of laboratory experiments in industrial services is established will be subject to some adjustment in the direction of a possible reduction of the resulting figures. However, in laboratory conditions, we conducted experiments at values of q equal to 0.5 to 3.0% by weight of the original slag, which showed that the higher values of q higher than 3.0 is impractical (table, example 11), just as impractical and lower q lower than 0.5 (example 4). In conclusion I must say that as impoverishing agent can be used any sulfidization and/or a metal reducing agent, and any combination of them with each other. Especially useful is the use of metallic reducing agents containing Si, Al, etc. because the process of impoverishment is endothermic. In this case, the use of metal reductants allows you to completely or partially eliminate the need for heating of the slag during its depletion. For practical implementation does not need any radical reconstruction of the existing equipment as is currently siphon release smelting products that come in front of the furnace where the slag rises to the top surface. Only needed some innovations in the design of the front furnace for the production of slag and feed horn impoverish agent. There is no need to argue about the possibility of implementing the method in a freestanding stove installation. Thus, the above data demonstrate the feasibility of p is edlagaemoe technology and indicate the solution of the task. Sources of information 1. Mechev CENTURIES, Bystrov VP, Tarasov A.V. and other Autogenous processes in non-ferrous metallurgy. M.: metallurgy, 1991, 414 S. 2. Reznik I.D., Ermakov G.P., Schneerson AM Nickel. Volume 2. M: Science and technology, 2001,468 C. 1. The way depleted slag smelting of oxidized Nickel ores, including siphon intake smelting products from the melting furnace in the anterior horn and the processing of slag impoverish agent containing sulfur-containing material and carbonaceous reducing agent, characterized in that the processing of slag impoverish agent is carried out in counter-current by downloading impoverish agent on the surface of the directional moving upward flow of slag, with drops impoverish agent, falling down, kollektivet valuable components of the slag, through a counter-current movement, and the expense of impoverishing agent support in the amount of 0.5 to 3.0% by weight of slag. 2. The method according to claim 1, characterized in that the processing of the slag is carried out in a separate steel unit with continuous flow of slag from the melting furnace or hearth furnaces. 3. The method according to claim 1 or 2, characterized in that as the sulfur-containing material impoverish agent used individually or in presence of each other materials enriched in pyrite, peroration, sulphide of calcium, sulfate, calc what I metal reducing agents, mainly containing Fe, Si, Al. 4. The method according to any one of claims 1 and 2, characterized in that as impoverishing agent use replacement-sulfiding systems of FeS2-CaO(CaCO3)-C; FeS2-Fe2O3-C; FeS2-Fe-(CaSO4)-C; FeS2-Fe-CaO(CaCO3)-C. 5. The method according to any one of claims 1 to 4, characterized in that as the carbonaceous reductant used individually or in mixtures with each other materials taken from the group consisting of metals toxic, sulphur petroleum coke, coal char, coal, anthracite, peat, peat coke. 6. The method according to claim 5 characterized in that the quality of coal used brown and lean coal.
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