Reprocessing method of manganous waste slags |
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IPC classes for russian patent Reprocessing method of manganous waste slags (RU 2374336):
 
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.
 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.
 Method of continuous or periodical receiving of metal or several metals from slag, containing specified metal or compound of specified metal / 2371490
Invention elates to method of continuous or periodic receiving of metal or several metals from slag, containing specified metal or compound of specified metal. Method includes heating and melting of liquid metallic slag in primary or secondary melting mill, implemented in the form of electric furnace of alternating current. From primary or secondary melting mill melt of slag is fed into electric furnace of direct current. In this furnace it is implemented electrolytic deposition of extracted metal. Additionally into primary or secondary melting mill it is fed and/or injected restorative in the form of silicocalcium (CaSi), calcium carbide (CaC2), ferrosilicon (FeSi), aluminium (Al) and/or gaseous restorative.
 Method of processing final tailings / 2370551
Final tailings are leached with circulating concentrated hydrochloric acid at boiling temperature of hydrochloric pulp of 103-109°C thereby producing gaseous mixture of water vapours, hydrogen chloride and hydrochloric acid solution containing titanium, vanadium, iron, chromium, manganese and cake. Produced cake is washed and dried; so final product is obtained in form of concentrate of silicon oxide. The following compositions of metals are extracted by selective sedimentation out of obtained hydrochloric acid solution in three stages: titanium hydroxide, hydrated vanadium pentaoxide, mixture of iron and chromium oxides and basic manganese carbonate. Vapour-gas mixture of water and hydrogen chloride formed in each stage of metal composition extraction is condensed producing circulating hydrochloric acid. The acid is used for washing sediments of metal compounds and for leaching of source final tailings.
 Method and installation for extraction of metal from slag containing this metal / 2368673
Extraction method of metal from slag containing this metal includes heating of liquefied metallic slag in the first furnace, implemented in the form of alternating-current electric furnace, and transfer of melt from the first furnace into the second furnace, implemented in the form of alternating-current electric furnace. Installation includes the first alternating-current electric furnace with submersible electrodes and the second alternating-current electric furnace with located horizontally in top and bottom field of melt by electrode plates, connected by means of melt transfer from one furnace into other, the second furnace is outfitted by electromagnets for providing of mixing of melt.
 Mobile installation for granulating slag breakage / 2366734
Mobile installation for granulating slag breakage consists of transported removable platform whereon there are assembled at least facility for selection of slag breakage located above feeding hopper, granulating devices fed with slag breakage from feeding hopper, reservoir-storage for granulating water phase feeding granulating devices with water phase, power source and means of control over said components.
 Method of recycling of steelmaking slag / 2365642
Invention relates to multipurpose use of the raw material in ferrous metallurgy, in particular to the methods of recycling of steelmaking slag. The method involves extraction of large pieces of scrap metal from the steelmaking slag, screening and seperation of nonmagnetic slag with size of 0-50 mm, sieving of the nonmagnetic slag with size of 0-5 mm, crushing of the oversised material followed by screening with size of 0-5 mm and pneumatic classification seperating the pieces by their sizes: large pieces are 5-0.5 mm, small pieces are 0.5-0.16 mm and dust is 0.16-0 mm followed by pneumatic classification of the large and small pieces and their dry magnetic seperation.
Processing method of aluminium-containing slags / 2362819
Invention relates to processing methods of slag for aluminium smelting and its alloys, and also to production methods of construction materials and inorganic matters, particularly to technology of receiving of basic aluminium chloride. Processing method of aluminium-containing slag, containing aluminium nitride, includes water cleaning of soluble metals salt with regulation pH pulp. Additionally water cleaning is implemented with blowing of pulp by carbon dioxide up to receiving of meaning pH 7.0-7.5.
Method of processing final slag / 2358027
According to method at each stage of crushing there is performed air separation by means of transfer of material in air flow facilitating extraction of least dense non-metallic component of slag of dust-like fraction (-0.08mm); further there is performed magnetic separation of oversize slag or manual selection of metal from oversize slag, and after final stage of crumbling before air separation there is carried out selective crumbling of non-metallic component of slag; also in the process of treatment transfer of all non-metallic component of processed slag into dust-like fraction (-0.08mm) is executed in stages; dust-like fraction is extracted from slag with air flow at each stage. The invention facilitates extraction of practically all shot irons from processed material; it also facilitates production of well dried, cleaned from metal and crumbled raw additive for Portland cement.
Method of reduction and/or refining of metal containing slag / 2358026
Method of reduction and/or refining metal containing slag consists in supplying calcium carbide as reducer to slag in furnace. Also calcium carbide is supplied at volume determined in dependence on magnetite and/or copper oxide (I) contents in slag to facilitate growth of temperature at the boundary between slag and carbide and for change of slag structure to accelerate the rate of reaction.
 Depletion method of converter slags of nickel-cobalt manufacturing / 2355794
Invention relates to metallurgy of nickel and cobalt, particularly to depletion method of converter slag of nickel-cobalt manufacturing with extraction of nickel and cobalt. Method includes pouring of molten slag into heated aggregate, introduction into melt of pyrite, heating; melt settling with forming of sulfide mass, containing nickel and cobalt. Then it is implemented discharge, beading and utilisation of depleted slag. Additionally pyrite into melt is introduced in mixture with quartz. Quartz weight in mixture is from 3 up to 10% to weight of depleted slag, and weight of pyrite - 5 up to 10 times exceeding weight sum of nickel and cobalt, attended in depleted slag in oxidised form. Heating is implemented at the temperature from 1200 up to 1350°C. Melt settling before discharge of depleted slag is implemented from 20 - 30 minutes.
 Processing method of disintegrating slag / 2353682
Invention relates to ferrous metallurgy field, particularly, it relates to processing of disintegrating slag. Processing of disintegrating slag includes preliminary and final cooling, screening, dedusting and magnetic separation of decay daughter. Preliminary cooling and screening of disintegrating slag is implemented on screening grating with cells sizes from 80×80 mm till 300×300 mm with vibration action of frequency 3000-6000 vibration per minute with driving force from 2.5 till 9.0 kN. Final cooling and dedusting are implemented simultaneously in revolve drum with linear velocity of the internal surface of shell ring 0.2-0.5 m/s and rate of airflow in cavity of drum 0.6-4.0 m/s. Additionally powdered and dust-free decay products of slug is subject to magnetic separation separately.
 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.
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FIELD: metallurgy. SUBSTANCE: 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. EFFECT: invention provides achievement of total extraction of manganese into desired product, usage in the capacity of reducer of silicon carbide, contained in waste slag of ferrosilicon and also receiving of specified compound with low content of carbon and phosphorus. 2 ex, 4 tbl
The invention relates to the field of ferrous metallurgy, in particular to the recycling dump slag from the production of manganese and silicon ferroalloys with the purpose of extraction of manganese and get Ferroalloy high quality (phosphorus). Every year the world produces about 650 million tons of slag from the production of carbon ferromanganese, 550-600 million tons of slag from the production of silicomanganese, 100-150 million tons of slag from the smelting of medium-carbon ferromanganese and about 100-150 million tons of slag from the smelting of ferrosilicon. The main consumers of the dump slag from the production of manganese ferroalloys are building organizations that process it on gravel, sand, slag wool, Portland cement, cast products. With these toxins is lost up to 20% of the manganese in the smelting of silicon manganese and up to 50% of the manganese in the production of manganese metal. Table 1 shows the chemical compositions of the slag dump from the production of manganese ferroalloys and ferrosilicon.
Feature of all compositions are presented in table dump slag is: a very low concentration of phosphorus (0,005-0,009%), due to a high reduction potential in the production of ferroalloys; the presence of slag ferrosilicon silicon carbide, which can be used as an active reducing agent for the oxide of manganese; - availability of all compositions of slags from 3 to 8% Korolkov metal, which will be fully automatic alloy, providing high output. A method of refining slag melt, wherein the melt specify corrective additive in the form of calcium oxide and lead him basicity before the formation of dicalcium silicate, which destroys itself when cooled, and released the Regulus of metals extracted from the resulting powder by using magnetic separation. (Patent RF №2104977, IPC8SW 5/06, priority from 05.07.96,, publ. 20.02.98,, bull. No. 5.) The disadvantages of this method of processing slag dump are: - the necessity of using a separate electric furnace, in which the melt is brought to the desired composition; - use advanced physical methods in the form of magnetic separation to separate Korolkov metal from slag; the target product is extracted only confused the king and, and high concentrations leading element in the slag in the form of oxide compounds remain. There is also known a method of recovering manganese from slag from the production of carbon ferromanganese, providing an additive to the melt of calcium oxide to increase its basicity to 1.1-1.25 and processing it in the bucket silicon manganese, taken in the grain size of 5-15 mm For stirring of the melt used blowing an inert gas through a porous plug at the bottom of the bucket. (Nippon Kokan K.K. Application No. 61-157645, Japan, Appl. 29.12.84, No. 59-276014, publ. 17.01.86,, MPK822 In 47/00.) The disadvantages of this method are: low yield of metal; - use as a reductant specially produced silicomanganese; - the complexity of the process because of the need to purge melts. The closest in technical essence and the achieved effect is a method of processing dump slag manganese metal and commodity of silico-manganese in the electric furnace, by restoring present in the oxides of manganese of solid carbon. The result is a carbon ferromanganese or trademarks silicomanganese with low phosphorous content. The best scores were obtained in the smelting of silico-manganese from slag mixture trademarks of silicon manganese and metallicheskaya, taken in equal proportions. Extraction of manganese was increased by 20-25%, the residual concentration of manganese oxide in the slag does not exceed 5%. Information about the industrial use of the known method of processing slag dump is not available. (VI Dovgopol. The use of slag ferrous metallurgy, M.: metallurgy, 1978, str prototype.) The disadvantages of this method of processing slag dump is: problems of introduction of solid carbon (coke) in the furnace because of its low density and poor wettability of the melt; - high specific energy consumption; - the difficulty of determining the ratio between the components of the mixture used in the liquid state; - high multiplicity final slag. The technical result of the invention is: - achieving the most complete extraction of manganese in the target product; - use as a reductant silicon carbide contained in atalina the ferrosilicon slag; - the possibility of obtaining alloys particular composition with a low content of carbon and phosphorus; - the beneficial use of silicon slag in the smelting of ferrosilicon silicomanganese. This technical result is achieved in that in the method for processing dump slag from the production of manganese ferroalloys, including their draw is people, mix, download in the electric furnace, melting and release of smelting products, according to the invention the recovery of manganese oxides from dumping toxins are present in the slag from the production of ferrosilicon silicon carbide, taken by 10-50% more than required by stoichiometry for complete restoration of the oxide of manganese. Processing unprocessed slag includes the recovery furnace manganese oxides in a mixture of four slag from the production of silicon manganese, manganese metal, ferromanganese and ferrosilicon, taken in a certain ratio, ensuring complete restoration of a driving element and receiving a given composition of the metal that meets the requirements of the standard. The reducing agent is silicon carbide slag ferrosilicon. Processing of toxins are in rudovosstanoviteljnoj furnaces. The production of metal and slag is carried out in a cascade set the buckets. The temperature of the melt on the issue depending on the composition of the melted alloy ranges from 1430 to 1570°C. The essence of the invention lies in the fact that the basis of the proposed method are the following chemical reaction:
213 g - 40 g - 165 g - 60 g Calculations show that for the full recovery of 213 g of manganese oxide will be required by the stoichiometry of only 40 g of silicon carbide. If you goto the CSO product you can get metal manganese (165 g) and slag (60 g). If the processing method is to dump toxins lead to excess in the mixture of reducing agent (SiC), the response will look as follows:
71 g - 40 g - 83 g - 28 g The result of this reaction will be to actively recover manganese and dissolve the excess silicon. This excess silicon ensures a more complete transition of manganese in the alloy and the receipt of silico-manganese with a given silicon content. Use in the charge connection in the form of silicon carbide allows for active recovery processes in a wide temperature range (at low temperatures the main role as a reductant plays silicon, and high - carbon). With an excess of silicon carbide in the mixture below 10% is difficult to obtain a high technical and economic indicators of the process, and if an excess of silicon carbide is greater than 50%, i.e. the probability of obtaining silicomanganese, do not meet the state standard on the silicon content. Below are examples of use of the invention does not exclude other in the scope of the claims. Example 1. In the electric resistance furnace tammana) were loaded crucible and furnace included. Upon reaching the temperature in the furnace 1500-1550°C crucible was loaded a mixture of toxins. Table 2 presents the chemical compositions used manganese is lacquers. The melting of the entire mixture melts stood for 10-12 minutes until the termination of allocation of bubbles; the crucible was taken out and cooled in air. Separately weighed slag and metal and determined their chemical composition. In table 3 and 4 presents the experimental results. The experimental results showed that contained in the slag ferrosilicon silicon carbide allows to increase throughout recovery of manganese on 15-32%. When this happens disposal Korolkov metal contained in dumping slag. Experiments 1 and 2 held on the charge - method prototype. Therefore, the results of the growth in extraction of manganese taken for zero. In dumping the slag content of the oxide of manganese is not more than 2.5%.
Example 2. In electric arc furnace with transformer capacity of 120 kVA downloaded the mixture of toxins. Chemical compositions of the slag used is presented in table 2. The mixture consisted kg: - of silico-manganese slag - 15, the ferromanganese slag - 4, - slag manganese metal - 1, - ferrosilicon slag - 5,5. Melting led to constant charge continuous process with periodic release smelting products. Made 8 releases. The average composition of the metal, wt.%:
The average composition of the slag, wt.%:
Spent the balance of the bottoms showed that the alloy has moved additionally manganese on average from 23 to 35%. The ratio of slag amounted to 2.1. The proposed method can be implemented on Ferroalloy plants that produce manganese ferroalloys. The method of processing the mn containing slag dump, including crushing, mixing, download in the electric furnace, melting, recovery of manganese oxides and products of melt, characterized in that the mixed mn containing final slag and slag from the production of ferrosilicon and carry out the recovery of oxides of manganese, silicon carbide present in the slag from the production of ferrosilicon, the content of the carb is Yes silicon in the mixture of slag by 10-50% greater than the amount required by stoichiometry for complete recovery of manganese oxide.
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