Procedure for refinement of zinc containing raw material from impurity metal oxides and impurity metals; furnace for implementation of this procedure |
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IPC classes for russian patent Procedure for refinement of zinc containing raw material from impurity metal oxides and impurity metals; furnace for implementation of this procedure (RU 2389809):
  
 Duplex-furnace for smelting of manganese alloys from ferrimanganese bases and concentrates and anthropogenic wastes of metallurgy / 2380633
In arch of siphon there are implemented openings or windows for loading of carbon-bearing materials, partition with bottom window or windows for flow of melted slag into siphon is implemented in the form of common end wall for liquid-phase smelting shaft and siphon with electrode(s) and allows window or windows for fume extraction from under arch of siphon, located on level not higher than horizontal axis of top row of tuyeres of liquid-phase smelting shaft, siphon is outfitted by solid transverse partition, installed in its bottom part parallel to common end wall for liquid-phase smelting shaft and siphon at a distance enough for flow of required volume of slag melt from liquid-phase smelting shaft on surface of heated layer of carbon-bearing material, herewith solid transverse partition fully separates siphon from liquid-phase smelting shaft, and its top edge is located higher than horizontal axis of bottom row of tuyeres of liquid-phase smelting shaft.
 Device for gas-thermal oxidation of objects made from titanium and titanium-containing alloys / 2369663
Invention relates to equipment for passivation of metal surfaces, more specifically to devices for gas-thermal oxidation of objects made from titanium and titanium-containing alloys. The device has an oxidation chamber, fitted with a cooling system and a heating system, a unit for feeding gaseous mixture into the oxidation chamber, a unit for outlet of gaseous mixture from the chamber, a chamber for cooling oxidised objects, which has a unit for flowing cooling inert gas medium in and out. The cooling chamber is joined to the oxidation chamber through a rotary valve, made with two hemispherical gates, which can open and close the opening in the rotary valve for joining or separating both chambers.
 Control method of level of top surface of slaggy phase and boundary of slaggy and metallic phase of melt in lift tube tank of iron-and-steel furnace by vanukov or romelt / 2368853
Invention relates to non-ferrous metallurgy field. According to method it is implemented voltage feeding to electroconductive refractory rods, used for slag heating and setting adjusting of current value. It is displaced rod and implemented continuous measurement and comparison of current value through rod with setting. At equality of measured value of current to setting value it is fixed top surface of slaggy or metallic phase of melt in tank of iron-and-steel furnace. In the capacity of electroconductive refractory rod it is used graphitic rod or electrode, used for electroarc heating of melt in tank of iron-and-steel furnace. After achievement of equality of current setting to corresponding measured current values it is checked equality to zero of the first current derivative.
 Plant for object survey under high temperatures / 2367934
Invention is related to testing of objects, comprising explosive and toxic substances, for various thermal effects. Plant comprises working chamber with loading window arranged with the possibility of its overlapping, the following components installed inside chamber - device for fixation of object and at least one fuel header with vortex nozzles, device for fuel supply, tube connected with its one end to fuel supply device, and with the other end - to header, ignition device, additionally, at least one tray installed under header, and at least one pair of additional devices for fuel supply and ignition, every of which is installed at a preset distance from working chamber and is connected accordingly by the first and second additional tubes to tray. On the second additional pipe, upstream ignition device, pipe cooling device is installed.
 Dehydration method of carnallite raw materials and device for its implementation / 2359911
Group of invention relates to non-ferrous metallurgy, particularly to method and device for preparation of carnallite raw materials to the process of electrolytic magnesium recieving. According to the method carnallite raw materials are loaded and dehydrated in the furnace by fuel gas, dehydrated carnallite is separated in dust cyclone from withdrawn gas and fed into the melting cyclone, where it is heated by fuel gas, received in burner by means of chlorine burning in natural gas, it is melted and heated up to the temperature 700-800°C. After overheating mixture of fuel gas and molten waterless carnallite is fed simultaneously in the melt collector, where gas is separated from the melt by means of collision with partition and fed into the furnace to dehydration stage, and waterless carnallite is discharged. Unit includes furnace with nozzles for loading of raw materials and gas mixture withdrawal with waterless carnallite, with nozzle for feeding of fuel gas, dust cyclone, connected to the furnace by gas pipe, melting cyclone, connected by pipeline to dust cyclone and melt pipe with melt collecto, outfitted by burner for burning of chlorine, collector of the melt with discharge nozzle for melt. It is also outfitted by gas flue, connecting melt collector with furnace and outfitted by device for gas feeding additionally melt collector is implemented in the form of tank with partition and outfitted by additional nozzle, connected to gas pipe.
 Assemble for reprocessing of powdered lead- and zinc-containing raw materials / 2359188
Invention relates to ferrous metallurgy, mainly to devices for reprocessing of powdered lead- and zinc-containing raw materials, in which there can be copper and precious metals. Aggregate for reprocessing of powdered lead- and zinc-containing raw materials contains rectangular upright smelting chamber with burner facility, gas cooler stack, partition with water-cooled copper elements, separating smelting chamber from gas cooler stack, electric furnace, separated from the smelting chamber by partition with water-cooled copper elements, coffer chord, facilities for discharge of smelting products, bottom, herewith correlation of difference of level of bottom edges to distance from the smelting chamber crown to bottom edge of partition, separating electric furnace from the smelting chamber, is 0.15-0.29, and relation of distance from bottom edge of this partition up to bottom to difference of level of bottom edges is 1.25-2.10. On walls of gas cooler stack of aggregate there are installed not more than two tuyers on the level of bottom edge of partition, separating gas cooler stack from smelting chamber, with inclination into the side of bottom on-the-mitre to horizontal plane, specified by formula α=arctg(k-ΔH/B), where α - angle of tuyers slope; k - coefficient of angle of tuyers slope, equal to 1.11-1.25; ΔH - difference of level of bottom edges of partitions; B - inside width of gas cooler stack. At mounting of two tuyers they are located by one on each of opposite side walls of gas cooler stack with reflector displacement relative to its cross-axial section. Additionally each of it is located at a distance of cross-axial section of gas cooler stack, relation of which to inside length of gas cooler stack is 0.25-0.30.
 Liquid-phase furnace for smelting materials containing ferrous and nonferrous metals / 2348881
Invention relates to metallurgy and, particularly, to the plants for continuous processing of oxidised nickel-containing ores, slag and dust. The liquid-phase furnace includes rectangular caisson-type well with lined walls being situated underneath. The well expands in the upper part. It is provided with top and bottom tuyeres. The well is separated into smelting and recovery chambers by a transverse partition. The chambers are interconnected through the window for smelt cross-flowing in the lower part of the transverse partition. The furnace also includes staggered or tilted hearth, slug discharge trap and electrodes being merged into the smelt. The electrodes are installed in slug release trap with their heat-generating ends being placed on the border of slug phase and metal phase separation in the trap. Besides, the trap volume is more than 10 times less than the recovery chamber volume.
 Furnace of magnesium continuous refinement / 2348715
Invention concerns devices for refinement of magnesium. Furnace of magnesium continuous refinement with salt heating includes lined cylindrical casing installed inside on supports alloying basket with central vertical channel, crown, introduced through side wall lower than alloying basket electrodes and bottom with bevels. At that distance from bottom till electrodes is 200-300 mm, and distance from electrodes till alloying basket is 1.0-2.0 of electrodes height. Electrodes are located symmetrical relative to vertical axes of furnace and relative to each other. In crown above electrodes there are implemented manholes with covers. Supports of alloying basket bear on electro- insulating supports or gaskets, and top edge of electrodes is implemented as bevel. Diameter of bottom horizontal part is 0.5-0.95 of distance between diametrical electrodes.
 Method of treatment hard gold-arsenical ores and concentrates and furnace for its implementation / 2348713
Invention concerns treatment of hard gold-arsenic ores. Particularly it concerns antimonous sulphide ores and concentrates. Method includes without oxidising melting in smelting chamber with receiving of matte and slag melts and treatment of melting products by metallic phase. At that without oxidising melting is implemented continuously in circulating melted slag with out of melting products into settling chamber to interphase boundary slag - matte. Before melting circulating melted slag is separated from operating gases. For circulating it is used maximum separated from matte slag. Treatment of matte by metallic phase is implemented in continuous operation. Furnace for processing of hard gold -arsenic ores and concentrates includes smelting chamber. Furthermore, it is outfitted by recycling contour, containing of gas-lift unit with tuyeres and descending and ascending channels of melted slag, gas separating and settling chambers. Gas separating chamber is communicated with smelting chamber through bleed blowhole by means of channel for separation of working gas of gas-lift unit and gas separating chamber from circulating melted slag. Smelting chamber immersed into settling chamber to interphase boundary slag - matte. Settling chamber contains gas flue for withdrawal of sublimates and low blowing melting products.
 Furnace for continuous melting of sulphide materials in molten pool / 2347994
Invention refers to metallurgy, particularly to devices for continuous processing of sulphide ores and concentrates containing copper and/or nickel. The furnace consists of a caisson stack with tuyeres, of a facility for charge loading, of two transverse partitions not reaching a bottom thus forming overflow ports for melt; the said partitions divide the stack into a melting chamber, a reduction chamber and a chamber of settling; the furnace also consists of a device for tapping of molten products and of individual facilities for gas exhaust from the melting and reduction chambers. The partition dividing the melting and reduction chambers pressure tight separates gas space between the chambers. The upper edge of the overflow port into the settling chamber is located above the upper edge of the overflow port between the melting and reduction chambers, while the devices for tapping molten products from the furnace are arranged from the side of the settling chamber.
 Procedure for processing metals chips of titanium subgroup and their alloys / 2389807
Procedure consists in degreasing chips with water solution of detergent implementing ultra-sonic bath, in washing chips in hot water, in their drying and crumbling. Also before degreasing chips are crumbled and simultaneously sprinkled with water solution of detergent; degreasing is performed in the ultra-sonic bath where concentration of detergent is 10-40 g/l at temperature 50-65°C during 5-10 minutes. Upon sizing and/or magnet separation chips can be introduced into composition of alloys as addition to charge materials.
Method of processing technogenic iron-bearing sludges with valuable components / 2387721
Method involves influence of acoustic field with supersonic frequency on sludges during 15-25 seconds. Then spraying with bacterial solution is performed with further cultivation of microorganisms in the solution and their accumulation. After that calalytic agents intensifying microorganism accumulation are added, and constant aeration of sludges with bacterial solution is performed at 20-35°C. After aeration valuable components are leached from sludges and removed from them.
 Method of processing vanadium containing converter slag / 2385353
Method consists in crumbling, in oxidising annealing converter slag with production of ash, in leaching vanadium from ash with solutions of alkali and in extracting vanadium salts from vanadium solution. Converter slag containing reverse manganese additives over 20 % MnO, preferably 25-27 %, at ratio of manganese to vanadium equal to 1.5-1.7 is annealed during 1.0-1.5 hours at temperature 800-850°C, further vanadium is selectively leached from ash with solution of alkali at presence of carbon dioxide gas at mole ratio CO2: Na=0.5-1 or vanadium and manganese are collectively leached at pH 1.5-2.5 with sulphuric acid or spent electrolyte after production of electrolytic manganese dioxide and are extracted from solution of vanadium and manganese salts.
Method of processing disintegrating metallurgical ladle slag / 2383635
Disintegrating metallurgical ladle slag treatment consists in extraction of metal inclusions out of disintegrated slag by method of magnet separation; upon extracting metal inclusions out of disintegrated slag particles of dimension over 5 mm are removed. The rest of slag is crumbled in a ball mill thereby producing particles of less 0.1 mm dimension; further, slag is pelletised interacting with water at amount 10-15% of slag mass.
 Manufacturing method of consumable electrode / 2382826
Invention relates to field of special electrometallurgy and can be sued at manufacturing of consumable electrode for melting of ingots of high-reaction metal and alloys, for instance titanic, in vacuum arc furnace. Manufacturing method of consumable electrode from wastes of titanic manufacturing includes assembly of electrode elements by placement of them on conducting rod by whole its length subsequent welding on of elements to rod by welding. In the capacity of electrode elements there are used blanks in the form of disks with opening in the center. Blanks are received by means of remelt of wastes of titanic manufacturing on tray with projection in the middle.
Charge for manufacturing of briquetts for metallurgical manufacturing on basis of industrial wastes, containing oxidated iron-bearing material / 2382090
Charge on the basis of industrial wastes, containing oxidised iron-bearing material, contains organic and/or mineral binder and water. In the capacity of oxidised iron-bearing material it contains extracted from iron-ore concentration wastes iron-ore concentrate, of fraction from 0.1 mm up to 10 mm. Ratio of components in charge is following, wt %: extracted from iron-ore concentration wastes iron-ore concentrate - 88-90%, binder - 10-12%. Additionally content of technical water subject to moisture in components is 8-10% of materials mass of charge.
 Method and device for burning of materials, containing noble metals / 2380436
Furnace for secondary treatment of highly explosive materials containing noble metals and organic components, burnt with high energy release, contains at least one chamber and device for alternating switching of operation modes of furnace chamber between stages: A - by pyrolysis or semicoking in protective atmosphere, containing not more than 6 wt % of oxygen, and B - by oxidising burning of organic components, including carbon. Additionally furnace chamber allows indirect heating and control device, implemented wit ability of definition of stage of pyrolysis or semicoking by means of sensor and control of device for switching of operation mode of furnace chamber so that after finishing of pyrolysis or semicoking into furnace chamber it is fed air or oxygen. According to the invention, thermal afterburning can be used for two furnace chambers, one of which is in pyrolised mode or semicoking mode, and other operates in the capacity of combustion chamber.
 Method of sulphur removing of active mass and lead accumulators lattices / 2379364
Method includes sulphur removing in two stages. At the first stage lead sulfate from active mass is put into contact with Na2CO3 in solution, receiving dispersion, containing carbonised active mass on the basis of main lead carbonates. At the second stage this dispersion is put into interaction with CO2 with formation of dispersion, containing sweet active mass on the basis of PbCO3. Between these two stages it is implemented granulometric division with following sulphur removing of coarse grain.
 Cleaning plant and method of cleaning / 2379114
Installation contains vessel in which it is held molten metal allowing admixtures, electromagnetic force generator, which creates electromagnetic force, activating circulation of molten metal, baffle arrangement for withdrawal of nonmetallics, collected in area of low pressure, and generator of magnetic force, located on external wall of vessel. Ferromagnetic structure is implemented with ability of passing of molten metal and located in vessel in circulating flow. Through ferromagnetic structure it is passed magnetic flux from magnetic force generator for creation of gradient in magnetic field. It is provided cohesion of metallic admixture to ferromagnetic structure and removing of admixture.
 Method of silver receiving / 2378398
Method includes its dissolution in nitric acid, preparation from received solution by evaporation of product, containing silver and copper nitrate, its mixing to water solution of ammonia. After blending it is implemented filtering of mixture with receiving of ammonia - nitrate filtrate, settling of silver from ammonia - nitrate filtrate by means of restorative treatment and washing of reduced silver. Additionally mixing to water solution of ammonia is implemented up to achievement of value pH of mixture, equal to 3-6. Before restorative treatment it is finished weight ratio of ammonia and silver in ammonia - nitrate filtrate up to 0.315-0.41. Restorative treatment of ammonia - nitrate filtrate is implemented at heating with usage in the capacity of reducing agents of formic acid and (or) sulphite sodium. Reduced silver is washed by solution of hydrochloric acid.
 Purifying method of secondary zinc alloys / 2324750
Invention concerns an area of purifying methods of secondary zinc alloys, their procurement from the auxiliary raw materials, and can be used in metallurgy and mechanical engineering. The method of purifying of the secondary zinc alloys includes processing of an alloy combination with intensifying agent which, when coming into contact with the zinc residual elements, begin to form churlish, heat-resistant phases, and segregate the infusible compounds. Interaction with these intensifying agents and segregation of the infusible phases is carried out by means of passing the molten mass through a foam-ceramic filter with an active ultra dispersal cover obtained as a result of chemical sedimentation of connection between a number of elements belonging to the II-IV Group of the Mendeleev periodic system, coupled with the thermal processing performed under the 1000-1200°C range of temperatures. The technical achievements of this invention result in removal of non-metallic inclusions, increases in consistency of distribution and reductions in composition of led and iron.
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FIELD: metallurgy. SUBSTANCE: procedure consists in charging zinc containing raw material together with additive of metal aluminium at amount of 0.02-0.05 % of weight of zinc containing raw material into stand of salts melt of composition wt %: NaCl - 56-59, NaF - 22-23, KCl - 11, Na2B4O7 - 4-6, B2O3 - 3-5 at temperature 600-700°C. The furnace consists of a shell made out of refractory steel. A ceramic branch is used for draining refined melt of zinc into pans. The ceramic branch is also used for emptying the furnace of zinc and salts melt during maintenance repairs and emergencies. The bottom of the furnace is lined with refractory non-metallic materials. The shell of a crucible on internal surface is also lined with refractory non-metallic materials at height from the bottom of the furnace up to 500-600 mm; a layer of refractory glue is applied at the joint point of refractory non-metallic lining with internal surface of the shell. EFFECT: reliable operation of furnace under continuous mode, reduced power expenditures, and upgraded quality of refined zinc. 11 cl, 1 dwg, 2 tbl
The present invention relates to the metallurgical industry and can be used for the purification of zinc-containing raw materials from oxides of impurity metals and impurity metals in the composition of the intermetallic compounds, with the receipt of zinc, which can be used for hot-dip galvanizing steel strip, the receipt of dry zinc oxide, zinc oxide, various alloys based on zinc. A known method of purification of zinc from oxide impurity metals and bake for implementing the method, selected as a prototype, including the melting of zinc in the molten sodium tetraborate containing 3-7 wt.% anhydride of boric acid, at a temperature of 750-800°C and bake for cleaning zinc containing vertically mounted crucible, which has a wall pocket, a nozzle for discharging the purified zinc, built-in pocket on the level of the height of the layer of gate, from the molten zinc in the pocket. The height of the layer of molten zinc in the shutter is determined by the formula: h1=(h2·P1+h3·P2):P1, where h1- the height of the layer of molten zinc in the bolt, m; h2- the height of the layer of molten zinc at the bottom of the crucible, m; h3- the height of the layer of molten sodium tetraborate in a crucible furnace, m; P1- the specific gravity of molten zinc, kg/m3; P2- specific gravity melt NAT the Oia tetraborates, kg/m3(RF patent 2261925, 26.02.2004 g, BIPM No. 28, 10.10.2005,). The disadvantages of this method are: - high melting point tetraborate sodium - 750-800°C; - high viscosity tetraborate sodium, which would entail significant takeaway from the furnace crate melt tetraborate sodium and will create difficulty in cleaning the cage from the glassy solidified molten salt; - the presence of the wall pocket creates inconvenience in loading in the salt melt cage with Zn-containing raw materials and difficulties in the manufacture of the crucible; - the inner wall of the crucible is not protected from the molten zinc, which can lead to the dissolution of metal from the crucible into the melt zinc at temperatures above 700°C; - not provided clear zinc from impurity metals in intermetallic compounds, such as FexZnyetc.; do not provide drain from the furnace of molten zinc and salt during preventive maintenance or emergency situations. A method of obtaining zinc from zinc dross, including the loading of zinc dross in the furnace, the melt at a temperature of 700-800°C, holding at this temperature for 0.25 to 0.5 h, cooling the melt to a temperature of 460-500°C, holding at this temperature for 0.5-0.7 hours and then discharge the molten zinc molds (RF Patent 2188244. 110420001, BIPM No. 24, 2708.2002 g, s). The disadvantages of this method are: - low yield of purified zinc; - low productivity of the furnace; - formation of nastys on the walls of the crucible that is the reason time-consuming and periodic cleaning of the furnace from nastily; education a significant number (40%) secondary waste zinc dross having a high content of impurities (10%); - the high cost of purified zinc, which is a consequence of the significant energy cost due to frequent stops furnace cleaning from nastily and low yield of purified zinc (up to 55%). The tasks of the proposed method of purification of zinc-containing raw materials from impurities and furnace for implementing the method are improving the quality of purified zinc, increasing the reliability of operation of the furnace, maintainability her, lowering energy costs, reducing the cost of the pure zinc. These objectives are achieved by the fact that the melting of the zinc-containing raw material is carried out in the molten salt having the composition, wt.%:
at a temperature of 600-700°C. The height of the molten zinc on the bottom of the furnace is 200-250 mm, and the height of the molten salt above the level of the molten zinc - 800-900 mm The loading of Zn-containing raw material with metallic aluminum in the amount of 0.02 to 0.05 wt.% of the mass of the zinc-containing raw material is carried out in a cage of steel. The cage hung on a rod fixed in the upper part of the crucible. The bottom cage is separated from the upper level of molten zinc at a distance of 250-350 mm Oven cleaning zinc-containing raw materials from oxides of impurity and impurity metals metals contains metal shell of refractory steel, the bottom of the furnace lined with refractory material and the shell of the crucible with an inner surface lined with refractory non-metallic material to a height from the bottom of the furnace 500-600 mm, between the surface of the shell and refractory lining has a layer of refractory glue. The nozzles for discharging the purified zinc molds and emptying of the furnace of molten zinc and salts are made of refractory ceramic materials. Pipe for draining cleaned zinc molds mounted in the furnace and lowered into the molten zinc at a distance of 20-50 mm from the bottom of the furnace, the height of the drain of the pure molten zinc through the pipe is 460-50 mm from the bottom of the furnace, nozzle for discharging molten zinc and salts before preventive repair of the furnace or during emergency situations is made horizontally at the level of the bottom of the furnace and has a shutter of refractory clay from the inside of the furnace. Ceramic nozzles are heated. For the implementation of the method of purification of zinc-containing raw materials from oxides of impurity metals in intermetallic compounds in the zinc in the molten salt load boric acid (H3BO3), the weight of which is calculated in advance in accordance with proceeding of the reaction: 2H3BO3=B2O3+3H2O MeO+Na2B4O7=Me(BO2)2+2NaBO2 Me2O3+Na2B4O7+2B2O3=2Me(BO2)3+2NaBO2 2NaBO2+B2O3=Na2B4O7, where MeO and Me2O3- oxides of impurity metals. After the collapse of boric acid in a salt melt on boric anhydride and water vapor in the molten salt immerse the crate with the Zn-containing raw material and metallic aluminum in a quantity of 0.02 to 0.05 wt.% of the mass of the zinc-containing raw materials. This can result in reaction scheme: FexZny+ZAl=FexAlz+yZn. Released zinc passes into the molten zinc, and intermetallic compounds of impurity metals with aluminum zahwah yaytsa metasomatism salts of impurity metals (Fe(BO 2)3etc) and remain in the cage, which after complete draining of molten zinc at the bottom of the furnace are removed from the molten salt together with the crate. Stand, remote from the molten salt, dipped in a solution of chloride salts of sodium and potassium, salts NaCl, KCl, Na2B4O7that remain on the cage as a result of its wetting by molten salts into solution, then the crate is easy to clean from metasomatised salts of impurity metals. The set of features of the proposed technical solution is the method of purification of zinc-containing raw materials from oxides of impurity and impurity metals metals and furnace for implementing the method is different from the prototype and should not be explicitly studied the prior art, therefore, the authors believe that the method and furnace for implementing the method are new and involve an inventive step. The method of purification of zinc-containing raw materials from oxides of impurity and impurity metals metals and bake for implementing the method can reduce the temperature in the furnace, to reduce energy costs, reduce the viscosity of the salt melt and thereby reduce the consumption of salt and intensity of the cleaning process Zn-containing raw material, to simplify the design of the furnace and to increase its reliability, avoid contact of molten zinc and increase reliability design austenite re-contamination of the molten zinc as a result of partial dissolution of the metals in the furnace, to improve the quality of the purified zinc extraction of impurity metals of intermetallic compounds present in the molten zinc, provides reliable operation of draining the pure zinc ingot moulds, provided by the emptying of the furnace of molten zinc and salts during repairs and emergencies. Oven cleaning zinc-containing raw materials from oxides of impurity metals is represented in the drawing. The furnace includes the following elements: - shell of refractory steel (POS.1); - the bottom of the crucible and the inner lining of the shell of the crucible of refractory non-metallic material (pos.2);. a layer of a heat-resistant adhesive (3); - outlet for discharging purified zinc molds (pos.4); - outlet for discharge of molten zinc and salts during repairs or emergency situations (pos.5); - electric heating pipe to discharge purified zinc molds (pos.6); - electric heating pipe for drainage of molten zinc and salts during repairs and emergencies (pos.7); - the lid of the furnace (pos.8); - the lining of the crucible furnace (pos.9); - molten zinc at the bottom of the crucible (10); the salt melt (pos.11);. - crate (pos.12). The method of purification of zinc-containing raw materials from oxides of impurity metals and impurity metals is as follows. To complete the cleaning method Zn-containing raw materials from oxides of impurity and impurity metals metals included in the intermetallic compound used oven special construction shown in the drawing. The crucible furnace (POS.1) is a shell without a bottom refractory steel, preferably steel SL. Preferably the sides of the crucible to apply cast without welded seams to eliminate education in the structure of the shell of the micro-cracks that may be formed during the welding process. The bottom of the crucible and lining the inner wall of the shell to a height from the bottom of the furnace up to 500-600 mm made of refractory non-metallic material (pos.2), such as refractory concrete. Between the lining of the shell is coated with the layer of refractory adhesive (3), preventing the formation of gap between the liner and the surface of the lining, and prevent the penetration in this gap of molten salt. The upper part of the crucible has a cover of two parts that move and move apart in opposite directions (pos.8). In the crucible of the furnace is mounted ceramic pipe (pos.4), the lower end of which is immersed in the molten zinc and separated from the bottom of the furnace at a distance of 20-50 mm, and the height of the discharge of the molten zinc in the mold is 460-510 mm In the furnace crucible is mounted horizontally ceramic nozzle (5) at the level of the bottom of the furnace, the inner end of which is sealed with refractory clay. This pipe sluits emptying the furnace during repairs in emergency situations. For heating furnaces use electric or natural gas. The crucible furnace (POS.1) lined (position 9) refractory material. The furnace has a steel casing. In standby mode the furnace for the continuous purification process zinc-containing raw materials from oxides of impurity and impurity metals metals at the bottom of the crucible is formed a layer of molten zinc (pos.10), constantly having a predetermined height (200-250 mm)pipe for drainage of molten zinc is formed its level at the height of 460-510 mm from the bottom of the furnace. Above the level of molten zinc at the bottom of the furnace is necessary to maintain the layer of molten salts height of 800-900 mm Originally furnace lead in working condition. To do this in a hot oven load in the cage bars of refined zinc and napravlyayut it reach the layer at the bottom of the furnace height 150-250 mm Further into the furnace portions upload the mixture of salts having the composition, wt.%:
After melting the loaded portion of the mixture of salts in the furnace is loaded the Ute next portion of the mixture of salts and so continue until until the level of molten salts reaches half the height of the crucible furnace. One serving of the salts is approximately 15-25 kg After that, the molten salt is immersed crate with purified ingots zinc and napravlyayut to his education at the bottom of the furnace 200-250 mm layer of molten zinc. If necessary, include electric heating pipe for drainage of molten zinc in the moulds. Later in the furnace portions upload the mixture of salts as long as the layer of molten salt above the level of the molten zinc will not reach the height of 800-900 mm, the Temperature in the furnace is maintained within the range of 600-700°C, preventing boiling of the molten salt. After complete thermal decomposition of boric acid on B2O3and water vapor and evaporation of water of crystallization of borax (Na2B4O7·10H2O) with the formation of sodium tetraborate (Na2B4O7) the salt composition will take the following values, wt.%:
Now the oven is prepared to complianc is Noy working on cleaning zinc-containing raw materials from oxides of impurity metals and impurity metals. Before the subsequent loading into the furnace zinc-containing raw material in a molten salt load portion of boric acid in the amount of 5-8 wt.% from mass loaded salts. In the crate together with the zinc-containing raw material load of 0.02 to 0.05 wt.% aluminum metal for the purification of molten zinc from impurity metals in intermetallic compounds with zinc. Data technological parameters are known (Patent 2261925, bull.№28 from 10.10.2005,) and proposed methods for removal of zinc from impurities shown in table 1. Example. The composition of the zinc-containing raw materials, wt.%:
The results of the technological process of the proposed method of purification of zinc-containing raw materials from oxides of impurity metals, doped metals when specified in the claims parameters and boundary parameters are presented in table 2:
1. The method of purification of zinc-containing raw materials from oxides of impurity metals and impurity metals by melting zinc is terasawa raw materials in molten salts NaCl, NaF, KCl, Na2B4O7B2O3and separation of the solid phase matabaro acid salts and intermetallic compounds of impurity metals from the molten zinc, characterized in that the melting of the zinc-containing raw material is carried out at a temperature of 600-700°C in a salt melt of the following composition, wt.%:
2. The method according to claim 1, characterized in that the removal of molten zinc impurity metals in the intermetallic compound with Zn-containing raw material in a molten salt load aluminum metal in a quantity of 0.02 to 0.05% by weight of Zn-containing raw materials. 3. The method according to claim 1, characterized in that the discharge of purified zinc from the furnace to operate at a height from the bottom 460-510 mm while the height of the molten zinc in the furnace of 200-250 mm and the height of the molten salt above the level of molten zinc 800-900 mm 4. The method according to claim 1, characterized in that the loading of Zn-containing raw material in the molten salt is carried out in a cage, manufactured by the Lenna of heat-resistant steel. 5. The method according to claim 1, characterized in that after the complete melting and dripping on the bottom of the furnace of molten zinc cleaning remove from the oven stand from matabaro acid salts of impurity metals and intermetallic compounds of impurity metals with aluminum carried out by immersion in an aqueous solution of chloride salts of sodium, potassium, followed by mechanical cleaning of the cage. 6. The method according to claim 1, characterized in that the bottom of the cage with Zn-containing raw material is dipped in a molten salt with a gap from the upper level of the molten zinc, equal 250-350 mm 7. Oven cleaning zinc-containing raw materials from oxides of impurity metals and impurity metals in the composition of the intermetallic compounds with zinc, containing the crucible in the form of a vertically installed shell made of refractory steel pipe for draining molds purified molten zinc, a pipe for periodic emptying of the furnace of molten zinc and salts during the repairs of the furnace or emergency situations and the crate with the Zn-containing raw material, characterized in that the furnace bottom and the sides of the crucible lined with refractory non-metallic material, while the sides of the crucible lined to a height of 500-600 mm from the bottom of the furnace, and the nozzles for discharging the purified zinc and emptying of the furnace made of refractory ceramic materials. 8. Furnace according to claim 7, different is connected with the fact, in the junction of the lining of refractory non-metallic materials with the sides of the crucible caused refractory adhesive. 9. Furnace according to claim 7, characterized in that the nozzle for discharging the purified zinc molds mounted in the oven and dipped into the molten zinc at a distance of 20-50 mm from the bottom of the furnace, the height of the drain pipe cleaned zinc is 460-510 mm from the bottom of the furnace and the pipe for discharging the furnace of molten zinc and salts before a preventive repair or during emergency situations is made horizontally at the level of the bottom of the furnace and has a shutter of refractory clay from the inside of the furnace. 10. Furnace according to claim 7, characterized in that the nozzles for discharging the purified zinc and emptying of the furnace are heated. 11. Furnace according to claim 7, characterized in that the cage with Zn-containing raw material attached to the stem in the upper part of the furnace to its immersion in the molten salt.
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