Method of combined processing of oxided and carbonate ferromanganese ores |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
IPC classes for russian patent Method of combined processing of oxided and carbonate ferromanganese ores (RU 2374350):
 
 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 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.
 Device for leaching of gold from gold-bearing materials / 2374341
Invention elates to device for cyanic leaching of gold from gold-bearing materials. Device contains tank for leaching with located gold-bearing material, collapsible tank, branch pipe for discharge and withdrawal of efficient solution and branch pipe for feeding of cyanide. It is outfitted by filled by alkali reaction vessel-closed scrubber, allowing siphon pipe, gas disperser HCN D pipe for feeding of alkaline solution and branch pipe for feeding of cyanide. Device is outfitted by pipe for gas distillation HCN and its feeding into reaction vessel - closed scrubber and pipe for feeding of air oxygen into tank. Additionally tank for leaching is implemented with internal perforated wall. Into space between external and internal walls of tank it is mounted siphon pipe connected to collapsible tank. In collapsible tank it is located system for solution blending branch pipe for discharge and withdrawal of efficient solution and gage tank for feeding of inorganic acid.
 Method of reclaiming cyanide from aqueous solutions / 2374340
Invention relates to a method of reclaiming cyanide from aqueous solutions, particularly recycled water which contains thiocyanates CNS-. The method involves electrochemical oxidation of thiocyanates. Before electrochemical oxidation, recycled water, which contains from 2 to 20 g/l thiocyanates, is acidified to pH=2-3. Electrochemical oxidation is carried out at current density of not less than 750 A/m2 for 2 to 3 hours while simultaneously letting in air into the solution. The formed hydrogen cyanide is trapped in an absorption vessel with its output ranging from 70 to 80%.
Stabilised for long period suspension for plating on iron material and technology of its manufacturing / 2374036
Invention can be used for prevention of engagement to each other pellets, particles or pellets manufactured from dolomite, magnesite, iron ore at its high-temperature processing. Suspension contains solid fraction approximately 52 - 61 %, water in amount approximately 39 - 48 %, not less than one anionic polyelectrolyte at concentration at least 25 % of dry mass in amount approximately 0.5 - 2.5 % and adhesive compound at concentration at least 30 % of dry mass in amount approximately 0.5 - 5.0 %. Viscosity of suspension is approximately 500 - 1500 centipoise, pH more than 10.5. In the capacity of solid fraction suspension contains particles with middle size 1 - 2.5 micrometres of hydroxide or magnesium carbonate or hydroxide or magnesium or calcium carbonate in amount 50 - 60 wt %. Equivalent content of magnesium oxide in solid fraction is 34 - 48 %, content of chloride - less than approximately 0.6 wt %.
 Copper concentrate leaching method / 2373298
Invention refers to hydrometallurgy, and namely to leaching of copper from copper sulphide-bearing concentrates, such as yellow pyrite. The process involves use of pyrite as catalytic agent for reducing ferric iron in order to avoid passivation of yellow pyrite surface. The process is performed in conditions at which pyrite is virtually not oxidised, for example by maintaining working potential of the solution at appropriate level. At that, yellow pyrite-to-pyrite mass ratio is within less than 3:1 to 1:20. Leaching is performed in acid sulphate medium and it can include oxidation with oxygen-containing gas. Then leached copper is extracted, for example by solvent or by electrochemical isolation.
 Bricket manufacturing line for metallurgic production on basis of industrial waste containing oxidised iron-bearing material / 2373295
Invention refers to ferrous metallurgy. The line consists of system for extracting oxidised iron-bearing material from industrial waste and brickets forming system containing capacity for receiving raw material, which are installed with the possibility of interaction, mixing device and bricket forming device made in the form of vibrating press, and supplying, dosing and transportation mechanisms connected to each other. System for extracting oxidised iron-bearing material from industrial waste consists of supply silo and screening device, which are installed in series and connected by means of supply and transportation mechanisms. Screening device is connected with transportation mechanisms to dry magnetic separation plant and to hydrodynamic classification plant containing the following, which is installed in the direction of technological process and connected by means of transportation mechanisms: screw mixer, spiral separator and dehydration mechanism made in the form of band vacuum filter; at that, both plants are installed with the possibility of interacting with capacity receiving raw material of bricket forming system.
 Manufacturing method of brickets for metallurgic production on basis of industrial waste containing oxidised iron-bearing material / 2373294
Invention refers to ferrous metallurgy, and namely to utilisation of iron-bearing waste which can be used as additional raw material blast-furnace and steel-making processes. From industrial waste containing oxidised iron-bearing material there extracted is oxidised iron-bearing material which is mixed with bonding agent with further formation of brickets by vibratory pressing. As industrial waste, there used is iron-ore preparation waste; at that, from it by means of screening there extracted are particles with size of 0.1 to 2 mm and 2 mm to 10 mm. At that, from particles with size of 2 mm to 10 mm there extracted is oxidised iron-bearing material by means of magnetic separation, and iron-ore preparation waste with particle size of 0.1 mm to 2 mm is mixed with water in the ratio of ((6/4):(7/4)) and oxidised iron-bearing material is extracted by hydrodynamic classification; after that, obtained pulp with increased content of oxidised iron-bearing material is dehydrated.
 Method of obtaining porous material on basis of platinum (versions) / 2373026
As per the first version, the method involves activation of fine carbon base with laminate-type structure by being intercalated in water solutions of strong acids and further interaction of intercalated base with hexachloroplatinum acid by introducing it, reduction of interacting products till platinum is obtained and oxidation of carbon base. As per the second version, the method involves interaction of fine carbon base with hexachloroplatinum acid in the presence of chloride, reduction of interacting products till platinum is obtained and oxidation of carbon base.
Method of obtaining porous material on basis of platinum (versions) / 2373026
As per the first version, the method involves activation of fine carbon base with laminate-type structure by being intercalated in water solutions of strong acids and further interaction of intercalated base with hexachloroplatinum acid by introducing it, reduction of interacting products till platinum is obtained and oxidation of carbon base. As per the second version, the method involves interaction of fine carbon base with hexachloroplatinum acid in the presence of chloride, reduction of interacting products till platinum is obtained and oxidation of carbon base.
Cleaning method against chlorine of sulfate zinc solutions / 2372413
Invention relates to non-ferrous metallurgy and can be used at method of cleaning against chlorine of zinc-sulfate solutions, received at sulfuric acid leaching of secondary zinc raw material, containing chlorine. Method includes sedimentation of chlorine-ion in the form of copper-chlorine cake by addition of copper-bearing solution and copper cake, containing metallic copper. In the capacity of copper-bearing solution it is used solution, formed at sulfuric acid leaching of solid residue, received after solution of copper-chlorine cake in solution of sodium hydroxide. Additionally copper-chlorine cake is solved in the solution of sodium hydroxide at concentration 50-75 g/l.
Processing method of cadmium-containing materials / 2372412
Invention elates to metallurgy, particularly to processing method of cadmium-containing materials, for instance cadmium-containing scrap. Method includes leaching of cadmium and its following sedimentation from solution. Additionally leaching is implemented by solution of ethylene-diamine-tetraacetate sodium at pH 9.0-9.5. After leaching it is removed from the solution ethylene-diamine-tetraacetate in molecular form by sedimentation by sulfuric acid at pH 1.0-1.6. Then it is implemented sedimentation of cadmium in the form of hydroxide by addition into solution of alkali up to pH of solution more than 9.8.
 Modificator for metallurgic dross of magnesia composition and method for producing the same / 2244017
According to invention known metallurgical dross modifier, containing calcium oxide, iron oxide, magnesia and silica, consists (mass %) as reduced to annealed material: calcium oxide 0.50-10.0; silica 0.5-5.0; iron oxide 0.5-6.0; and balance: magnesia in carbonate and hydrate forms at ratio of 0.5-2. To indemnify heat consumption for modifier dissolution it additionally contains 5-10 % of carbon. Modifier is produced by simultaneous dry grinding and mixing of batch components, containing virgin magnesite and calcined magnesite at mass ratio of (30:70-70:30), palletizing of grinded mixture in pelletizer with water up to specific surface of 0.6-1.2 m2/g; keeping of palletized material under static conditions and recovery of target grains with size of 5-40 mm. Before mixing 5-15 % of carbon as reduced to total mass in form of coke fines may be added to batch. After mixing process batch components may be humidified in mixer with 25-30 % of water and fashioned in briquette of volume up to 70 cm3.
|
FIELD: metallurgy. SUBSTANCE: 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. EFFECT: invention provides increasing of through extraction of manganese ensured by sharing of low-phosphorus dross, received from oxide and carbonate manganese concentrates and improvement of ferroalloy quality. 15 tbl, 3 dwg, 2 ex
The invention relates to the field of ferrous metallurgy, in particular to the production of ferroalloys, namely the creation of methods for joint processing of oxidized carbonate and iron-manganese ore with obtaining manganese ferroalloys, it meets the requirements of current state Standards and specifications. Manganese ore majority of Russian deposits are poor and phosphorous. They usually require complex methods of enrichment and the presence of high phosphorus content significantly limits the scope of their use in connection with the strict requirements to the quality of manganese ferroalloys by this parameter. From the technical literature there are several ways associated with finding the best options to poor processing of manganese ores, particularly ores Usinsk and Porazinska fields, in which there are elevated concentrations of iron and phosphorus and the use of which is not possible directly in one stage to receive the standard of manganese ferroalloys. Table 1 shows chemical compositions of manganese ores of the most attractive Russian fields.
With a deep enrichment of these ores gravity and a number of other methods in order to increase the concentration of the host item is obtained a considerable amount of fine-grained concentrates size from 0 to 5 mm, suitable for existing technologies for direct use in the production of manganese ferroalloys in the electric arc furnace. They must be subjected to pre-sintering. In enriched ore with increasing manganese content is high, the specific concentration of phosphorus (P/MP>0,005) and before smelting it manganese ferroalloys required obesfosforivanie. However, oxidized manganese ores are high silica concentration (above 10%), and carbonate - high basicity (CaO/SiO2>1), which also makes it difficult to use well-established methods for processing these ores (concentrates). For bestlolitas melting, you must have the ratio of phosphorus to manganese in concentrate less 0,0031, and the ratio of iron to manganese is less 0,125. Table 2 shows the chemical compositions of manganese concentrates, obtained during the concentration of iron-ore Usinsk field x-ray radiometric method.
(Rogaine I.D. and other problems of the application of manganese ores of Kuzbass, report at the international conference of ferrosplavshik, September 2008, Moscow). In relation to the composition of the concentrates shown in table 2, the above relationship is not maintained, therefore, to their processing requires new technological approaches. Currently intensively developed different methods (chemical, hydro) for obesfosforivanie and reduce the iron content in these concentrates, however wide their involvement in the production continues to be a problem requiring a solution. From the practice of reprocessing is similar in composition manganese concentrates widely known pyrometallurgical methods of their processing, which includes two stages: the first is the removal of phosphorus by smelting in an electric furnace at a limited flow rate of the reducing agent with obtaining malofosforistoj manganese slag; the second smelting of ferro - and silicomanganese with application received at the first stage malofosforistoj manganese slag. For example, the process of "Strategic Udi", which receive liquid metal implement the two-stage recovery of silty ferromanganese ores and complex ores with electionem extraction of Nickel, cobalt, chromium, manganese, phosphorus, iron and titanium. With regard to the processing of the poor ferromanganese ores known method includes: - recovery of iron oxides and phosphorus coal at a temperature of 1100-1250°C in a rotary tubular kiln; - receiving container; - download hot mixture in reflective, and then in an arc furnace, where the alloy mixture and dovolenkovat oxides of iron and phosphorus; - finishing liquid malofosforistoj manganese slag to ferro - or silicomanganese in the second furnace. 1 ton of dry ore (lump size <12.5 mm, the manganese content of 12-13% and iron 15-20%) load 300 kg of limestone and some coal. When the firing is removed crystallization water and CO2and a large part of iron is restored to the ferrous iron. Hot ore (1000-1200°C) load in a reverberatory furnace in which at 1350°C melting ore and fluxing the mixture. The melt is poured into the first furnace in which at 1350°C is carried out metallurgical beneficiation of ore and fluxing the melt. The slag discharged from the furnace contains 16-17% MP and 1-2% Fe. Phosphorous cast iron contains 2%C, 0.1% Of mn and 3.5% of R. In the second furnace get carbon ferromanganese or silicomanganese. In both cases, in the oven pour the liquid manganese slag from the first furnace and give the carbonaceous reducing agent with whom swesty in the first case or quartzite - second. The method proposed by the American engineer Mode in 1955, developed by firms Statedgic materials corp" US and "Anakonda" Canada, studied in Niagara falls (Canada) plant with a capacity of 50 tons/day, including rotary kiln length 24,4 m and a diameter of 1.37 m, and two reflective of the electric furnace 1 mV·A. Industrial testing method conducted at the plant in Matanzas (Venezuela). (U.S. patent No. 2342564, priority from 15.08.1957,, publ. Tom. 1007, p.66). The disadvantages of this method are: - the complexity of instrumentation technology; - low specific productivity of the units; problems in the service, related to the continuous accumulation of fine fractions of the ore on the walls of the rotary kiln; - high loss of manganese at each stage of the technological scheme. Also known is a method of processing poor oxidized manganese ores, including their processing, fractionation, agglomeration of fines agglomeration, electroplasma deficiency in the charge of carbonaceous reductant with getting malofosforistoj slag and products smelting. Further malofosforistoj mn containing slag is used for smelting silicon manganese or carbon ferromanganese flux process, and associated alloy is sent to the dump. Malofosforistoj manganese was going (MFSO), obtained from oxide concentrates (table 3), which contains more than 30% of silica with a low ratio of CaO/SiO2usually used in the smelting of silicon manganese (figure 1).
(Migosi. Electrometallurgy of manganese. Kiev, ed. "Technique", 1979, str-68; 119-132). Smelting of silico-manganese is carried out continuously on charge, in addition to containing malofosforistoj slag manganese concentrates (their number in the charge is determined by the requirements of the final content of phosphorus in silicon manganese, quartzite and carbonaceous reducing agent. Data analysis material balance silicomanganese smelting mass brand SMP shows the em the extraction of manganese from slag in the alloy does not exceed 70%, and silicon 35-40%), almost full (90%) transition phosphorus. Waste slag of silico-manganese has the following chemical composition: 49-52% SiO2; 12,2-14,5% CaO; 2,9-3,2% MgO; The 13.4-15.3% Of Mn; 0,002-0,003% P; 0,5-0,6% S u 7,2-8,0% Al2O3. The ratio of slag - 1,3-1,35. Almost the entire volume of the slag from the production of silico-manganese is in the dump. Apply malofosforistoj slag obtained from oxide of manganese concentrates for smelting carbon ferromanganese flux process economically impractical due to the necessity of introducing into the mixture a considerable quantity of lime to bind silica in solid silicates of calcium (2CaO-SiO2), which further leads to growth ratio of slag and, consequently, to large losses of manganese (up to 30-35%), poor performance of the electric furnace and increased energy consumption. The disadvantages of this method are: large losses of manganese with the final slag due to the high multiplicity and the impossibility of their target application in the future; - low productivity of the furnace. A method of refining carbonaceous ores on malofosforistoj manganese slag and then using it for ferromanganese smelting. (News of higher educational institutions. Ferrous metallurgy, the 4, 1967, p.55-59). Method for processing manganese carbonate concentrates with obtaining carbon ferromanganese are presented in figure 2. Smelting carbon ferromanganese are in a continuous process with a closed top on a mixture of malofosforistoj slag (table 4) and annealed carbonate concentrate (34.8% of Mn; 9,25% Fe; 0,314% P; 17,0% SiO2; 12,2% CaO). As the reductant used toxic, and flux - limestone. Additionally, the composition of the charge was introduced wood chips.
The ratio between malofosforistoj slag carbonate concentrate in the charge was supported as 50:50. The resulting metal composition: 7-79% Mn; 0,3-0,6% Si; 0,33-0,36% P; 6,5-7,0% C. Removing manganese - 67-77%. The ratio of slag - 1,9-2,05. Raw material consumption per 1 ton (basic), kg:
This information is taken by us as the nearest source of the prototype. The disadvantages of the prototype method of processing manganese carbonate concentrates with obtaining carbon ferromanganese are: - low end-to-end extraction of manganese in the metal; - high ratio of slag; - poor performance. The technical result of the invention is to improve end-to-end extraction of manganese due to sharing malofosforistoj slag obtained from oxidic and carbonate manganese concentrates, and improving the quality of ferroalloys. This technical result is achieved by the fact. in the process of co oxide and carbon is the shaft ferromanganese ores with high content of phosphorus, includes separate pre-enrichment mentioned ores with obtaining the oxide and carbonate concentrates, fractionation, separation of large and agglomeration of the fine fraction, smelting of them malofosforistoj slag(MPSC)derived from carbonate concentrates, and malofosforistoj slag(MFSO)obtained from oxide concentrate, the latest in the smelting carbon ferro - and silicomanganese, smelting carbon ferromanganese exercise benfluralin process using as raw ore carbonate concentrates and malofosforistoj slag (MFSA) to obtain the crude manganese slag, and silicomanganese smelting is carried out on the mixture, consisting of pig manganese slag from smelting carbon ferromanganese, malofosforistoj slag (MFSK), quartzite and carbonaceous reductant. The invention consists in that the production of carbon ferromanganese are not flux process, as is traditionally held on the raw materials of low quality using malofosforistoj manganese slag, and benfluralin obtaining pig slag. To get in steelmaking slag manganese content in the range of 27-30% is proposed to produce carbon ferromanganese by bestlolitas technology with getting malofosforistoj W is aka (MFSO) 47-49% Mn, which can be obtained only with the use of oxide of manganese ore. Figure 3 presents the proposed scheme of the process of co-oxide and carbonate ores, including transaction processing, fractionation, agglomeration of obtaining from them with the help of electroparadise first two compositions malofosforistoj slag (MFSO and MFSK), and then using them at the end of the way of two commercial products: - carbon ferromanganese; commodity silicomanganese. As of ore for smelting malofosforistoj slag was used oxidic and carbonate manganese concentrates without preliminary drying and firing. Chemical analysis concentrates are presented in table 2. In the smelting malofosforistoj slag in the composition of the charge was additionally introduced a small amount of quartzite (to ensure good recordigns slag and improve its quality phosphorus). For MFSO of 6.5%, for MPSK - 14.5% of the weight of the ore. As the carbonaceous reductant used toxic. In tables 5 and 6 presents the chemical compositions malofosforistoj toxins and passing the resulting alloy. The slags were used in the smelting of manganese ferroalloys. Passing alloy was stored.
Carbon ferromanganese (3) In the smelting carbon ferromanganese as ore materials you used the following concentrates: carbonate concentrate 1st grade; carbonate concentrate 2nd grade; MFSA. The composition of the charge,kg: carbonate concentrate 1st grade 1000 carbonate concentrate 2nd grade 921 MFSO 679 Cox 349 cast iron chips 25 Prepared mixture through trubecki fed to the furnace is electropica. Every 2 hours 40 minutes is the product of melting refractory-lined ladle and two slikovni installed in series. In the melting receive two products: - carbon ferromanganese; - pig manganese slag. The casting alloy layer-by-layer in the floor of the mold and after cooling is sent to the warehouse of finished products. Pig manganese slag (pmsh) after cooling is sent to the Department of slag-processing area, where it is crushed to the required fraction and is passed to storage bins for later use in the smelting of silicon manganese. Specific consumption of materials, kg 1 best:
The output of pig manganese slag (28% MP) is 1649 kg Energy consumption - 5132 kW·h/t (determined by calculation). Extraction of manganese in manganese iron - 60%. The transition of manganese in the slag(pmsh) - 36,46%. The compositions of the carbon ferromanganese slag and pig are presented in table 7 and 8.
Through the extraction of manganese (beneficial use) amounted to 96,46% instead of 60-65% by known techniques. The entire volume of the m smelted pig manganese slag (pmsh) was used in the smelting trademarks of silicon manganese. Silicomanganese (3) In the smelting of silico-manganese in the quality of ore used the following carbonate concentrates: carbonate concentrate 2nd grade; carbonate concentrate 3rd grade; pig manganese slag (pmsh); MPSC. As kremnezemsoderzhashchego raw materials used quartzite, and reductant - toxic. The composition of the charge, kg:
Preparation of the mixture, melting conditions, production and casting smelting products remained the same as on carbon ferromanganese. In the heats produced two products: silicomanganese and waste slag. Poured in molds and cooled silicomanganese is transferred to the finished goods warehouse, where it is crushed, sorted and sent to the consumer. Waste slag is transferred to the Department Shakopee is abode and after crushing and fractionation implemented by construction organisations. Specific consumption of materials, kg 1 best:
Energy consumption - 6318 kW·h/t (determined by calculation); Removing manganese - 73,79%. Chemical compositions of silico-manganese and waste slag are presented in tables 9 and 10, respectively.
Below are examples of execution of the invention does not exclude other in the scope of the claims. Example 1 In two-electrode furnace experiments were conducted to obtain carbon ferromanganese benfluralin process of malofosforistoj manganese slag, pre-produced from manganese oxide concentrates (claimed), and smelting carbon ferromanganese from the same slag flux process (known variant). Table 11 shows the average chemical composition of manganese ore raw materials from which smelted ferromanganese. The experiments conducted on ore-smelting electric furnace (100 kV·a) in order to obtain indicators of smelting carbon ferromanganese from new raw materials.
As the ore material was used a mixture of carbonate concentrates 1st and 2nd grade and malofosforistoj slag (MFSO), as well as restoring the of Italia - toxic. The composition of the charge, kg:
Oven worked smoothly, the distribution of gases in the furnace was uniform, Elektronik melt - stable. The weight of the metal from each melt ranged from 9.5 to 10.3 kg and slag from 15,8 to 17.0 kg Weighted average chemical composition of the metal and slag are presented in table 12 (ferromanganese) and 13 (pig manganese slag).
Extraction of manganese in the metal averaged 60.1 percent; the transition of manganese in the slag of 36.5%. Total beneficial use of manganese amounted to 96.6%. Control experiments on known (vlasovemu) method was performed in the same furnace at the furnace charge containing MFSO, lime, metal shavings and toxic. Maximum rate of extraction of manganese in manganese iron shown in the basicity of the slag 1.27, and was 69,8%. The slag content of the oxide of manganese is 15.1(11.6 km MP)% finds further application because of the low content of manganese and goes to dump, i.e. more than 30% of manganese is lost irreversibly. Example 2 On the ate, consisting of pig manganese slag composition (table 13), carbonate concentrate 2nd grade composition (table 11), MFSK composition (table 4), quartzite and Corsica, in the same furnace conducted experiments on the melting of silico-manganese brand SMP. The composition of the charge, kg:
Conducted 5 heats obtained to 51.1 kg of silicon manganese and 94 kg slag dump. The weighted average composition of the metal and slag dump are presented in table 14 (silicomanganese) and table 15 (waste slag).
Extraction of manganese in the metal ranged from to 75,0 72,5%. The composition of the metal meets the requirements of GOST 4756-91. The performed calculations show that 9.5 kg pig manganese slag (see the composition of the charge it is possible to additionally get about 2.8 kg of silicon manganese. The proposed method jointly oxide and carbonate ores have significant differences from the domestic and foreign counterparts, in particular: - smelting carbon ferromanganese from malofosforistoj slag (MFSO) benfluralin process of obtaining pig manganese slag (pmsh); - getting malofosforistoj slag MFSK from one carbonate concentrates. The proposed method manganese is lost only with waste slag silicomanganese, while according to the method he is lost and silicon manganese slag, and slag carbon ferromanganese, and his losses are from 30 to 40%. The invention can be implemented on Ferroalloy enterprises or individual workshops, specializing in ferroalloys smelting of manganese. The implementation of the present invention in the industry will solve the problem of rational use of significant reserves of poor manganese ores, particularly ores Usinskoye oil field, the processing of which by any means is not currently profitable. The method of joint processing of oxidized carbonate and iron-manganese ore with a high content of phosphorus, including separate preconcentration mentioned ores with obtaining the oxide and carbonate concentrates, fractionation, separation of large and agglomeration of the fine fraction, smelting of them malofosforistoj slag (MPSC)derived from carbonate concentrates, and malofosforistoj slag (MFSO)obtained from oxide concentrate, the latest in the smelting carbon ferro - and silicomanganese, while smelting carbon ferromanganese exercise benfluralin process with ISOE what Itanium as raw ore carbonate concentrates and malofosforistoj slag (MFSA) to obtain the crude manganese slag, and silicomanganese smelting is carried out on the mixture, consisting of pig manganese slag from smelting carbon ferromanganese, malofosforistoj slag (MFSK), quartzite and carbonaceous reductant.
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||