RU73873U1 - HARDWARE AND TECHNOLOGICAL PROCESSING SYSTEM FOR TITAN-CONTAINING CONCENTRATES - Google Patents

Abstract

The proposed utility model relates to the field of metallurgy and, in particular, to hardware and technological systems for processing titanium-containing concentrates used in the titanium-magnesium sub-industry to produce various commercial products - titanium metal and vanadium compounds. The objective of the proposed utility model is to increase work efficiency and ensure conditions for the neutralization and disposal of production waste. The technical result that can be achieved by implementing the developed technical solution is to increase the production of commercial vanadium compounds while addressing issues related to waste disposal and preventing environmental pollution by highly toxic substances. The problem is solved with the achievement of the above technical result by the proposed utility model - “Hardware-technological system for processing titanium-containing concentrates”, including an ore-thermal furnace equipped with a device for preparing the initial composite mixture, a unit for cleaning exhaust gases from dust, a dust collecting bin and an installation for crushing and grinding of titanium slag, a plant for preparing a charge for chlorination in a metal chloride melt, a salt chlorinator, a plant a novelty for gas purification, equipment for condensation of a gas-vapor mixture with a collection tank of technical titanium tetrachloride, a compartment for chemical and distillation purification of technical titanium tetrachloride from impurities, a container for vanadium oxytrichloride and a container for purified titanium tetrachloride, connected respectively to the site for producing vanadium pentoxide and redistribution for magnetothermal production

titanium metal. New in the proposed utility model is that the device for preparing the initial composite mixture has a connection with a metering hopper and a storage tank for technogenic oxide vanadium-titanium raw materials, a charge preparation unit for chlorination in a metal chloride melt, connected to a metering hopper and a supply tank for vanadium-titanium concentrates, salt chlorinator is equipped with a hydro-removal bath for spent chloride melt salt chlorinator, chloride pulp exit from the bath guide The spent melt disposal unit is connected to a series-mounted hydraulic sump to isolate the coarse fraction of insoluble residue and a circulation tank, on the lid of which there is a pipe for supplying vanadium pentoxide production wastewater to the circulation tank, the lower discharge from the circulation tank is connected to a reactor to neutralize and precipitate the amount of metal oxyhydrates, on the lid of the reactor there is a nozzle for connection to a magnesia milk dispensing tank, which is connected to a tank equipped with a mixer and a hopper with finely divided serpentinite waste for the preparation of magnesia milk, the dosing tank also has a connection to the gas treatment unit, the lower discharge pipe of the reactor for neutralization and deposition has a connection to the filter press, the precipitate of the amount of metal oxyhydrates from the trough of the filter press is directed to a mixer to which an insoluble residue bunker is connected, connected to a water sump, a bunker for dust collected from the waste gases of an ore-thermal furnace, a bunker dose a torus of fine wastes of processing of serpentinite raw materials, an inert filler bunker, for example, wood sawdust, a magnesia milk dosing tank and a spent absorption liquid dosing tank from a salt chlorine gas treatment unit, the outlet from the mixer is directed to a heated device for forming and pressing blocks.

Description

The proposed utility model relates to the field of metallurgy and, in particular, to hardware and technological systems for processing titanium-containing concentrates used in the titanium-magnesium sub-industry to produce various commercial products - titanium metal and vanadium compounds.

Known (V.G. Voskoboinikov, V.A. Kudrin, AM Yakushev. General metallurgy. M.: Akademkniga ICC, 2005, p. 768) instrumentation-technological system for processing titanium-containing concentrates, including an ore-thermal furnace for reducing electric melting of ilmenite concentrates , salt chlorinator for chlorination (at 800-850 ° C) in a melt of metal chlorides of titanium slag, equipment for condensing a gas-vapor mixture and purifying technical titanium tetrachloride from impurities and apparatus for magnetothermal production of metallic titanium on - titanium sponge.

A disadvantage of the well-known "Hardware-technological system for processing titanium-containing concentrates" is the lack of equipment for processing and rendering harmless aerosol, gaseous, solid and liquid production wastes generated at various stages of the process.

Of the known analogues, the closest in technical essence and the technical result achieved is the well-known (V. A. Garmata, AM Petrunko, I. V. Galitsky, Yu. G. Olesov, A. A. Sandler. Titanium. Properties, raw material base , physicochemical fundamentals and production methods. M: Metallurgy, 1983, p. 559) “Hardware-technological system for processing titanium-containing concentrates” - adopted as a PROTOTYPE.

The prototype equipment system includes an ore-thermal furnace equipped with a device for preparing the initial composite mixture, an apparatus for cleaning exhaust gases from dust with dust collecting hoppers and an apparatus for crushing and grinding titanium slag, an apparatus for preparing a charge for chlorination in a chloride melt metals, salt chlorinator, equipped with a gas treatment plant, equipment for condensation of a gas-vapor mixture with a collection tank of technical titanium tetrachloride on, a compartment for chemical and distillation purification of titanium tetrachloride, a container for vanadium oxytrichloride and a container for purified titanium tetrachloride, respectively connected to a site for the production of vanadium pentoxide and redistribution for magnetothermal production of metal titanium.

The “hardware-technological system for processing titanium-containing concentrates” according to the prototype provides a high-quality titanium sponge used for the preparation of various structural materials, including aerospace. In addition, the well-known “System” prototype provides for the disposal of vanadium compounds in the form of commercial products — vanadium pentoxide — from the initial mineral raw materials — ilmenite concentrates. The known system also provides for the purification of exhaust gas from an ore-thermal furnace from dust and the purification of exhaust chlorine-containing gases of a salt chlorinator.

The disadvantage of the "Hardware-technological system for processing titanium-containing concentrates" according to the prototype is:

- the unsatisfactory performance of Sistema on manufactured commercial vanadium pentoxide, which is due to the relatively low concentration of vanadium compounds in the original mineral raw material - ilmenite concentrate;

- the absence in the well-known prototype “System” of equipment for the processing, neutralization and disposal of chloride wastes generated during the chlorination of titanium slag in a salt chlorinator;

- in the known system does not provide for the purification of vanadium-containing wastewater and the disposal of secondary waste generated during the treatment of waste chlorine-containing gases from salt chlorinator;

The objective of the proposed utility model is to increase work efficiency and ensure conditions for the neutralization and disposal of production waste.

The technical result that can be achieved by implementing the developed technical solution is to increase the production of commercial vanadium compounds while addressing issues related to waste disposal and preventing environmental pollution by highly toxic substances.

The problem is solved with the achievement of the above technical result by the proposed utility model - “Hardware-technological system for processing titanium-containing concentrates”, including (see. Fig.) Ore-thermal furnace (1), equipped with a device for preparing the initial composite mixture (2), an installation for cleaning waste gases from dust (3), a dust collecting hopper (4) and a plant for crushing and grinding titanium slag (5), a furnace for preparing a charge for chlorination in a metal chloride melt (6), an oleaginous chlorinator (7), a gas treatment plant (8), equipment for condensing a gas-vapor mixture (9) with a collection tank of technical titanium tetrachloride (10), a department for chemical and distillation purification of technical titanium tetrachloride from impurities (11), a container for oxytrichloride vanadium (12) and a container for purified titanium tetrachloride (13), respectively connected to the site for

obtaining vanadium pentoxide (14) and redistribution for the magnetothermal production of titanium metal (15).

What is new in the proposed utility model is that (see Fig.) The device for preparing the initial composite mixture (2) has a connection with a metering hopper (16) and a storage tank for technogenic oxide vanadium-titanium raw materials (17), a charge preparation plant for chlorination in a metal chloride melt (6), connected to a metering hopper (18) and a supply tank (19) for vanadium-titanium concentrates, the salt chlorinator (7) is equipped with a water removal bath (7-1) of the spent chloride melt salt chlorinator, output chloride pulp from the spent melt water removal bath is connected to a successively installed hydraulic sump (20) to isolate the coarse fraction of insoluble residue and a circulation tank (21), on the lid of which there is a pipe (22) for supplying vanadium pentoxide production to the circulation wastewater, a lower discharge ( 23) is connected from the circulation tank to the reactor (24) to neutralize and precipitate the amount of metal oxyhydrates, on the reactor cover there is a pipe for connecting magnesia milk to the dispensing tank ( 25), which is connected to a tank equipped with a mixer (26) and a hopper with fine serpentinite waste products (26-1) for preparing magnesian milk, the dosing tank (25) also has a connection to the gas treatment unit (8), a lower discharge pipe ( 27) the reactor (24) for neutralization and deposition has a connection with a filter press (28), the precipitate of the sum of metal oxyhydrates from the trough (29) of the filter press (28) is directed to a mixer (30), to which a hopper ( 31) insoluble residue, connected to the sump (20), the hopper a doser of dust (32) trapped from the exhaust gases of an ore-thermal furnace, a hopper-doser (33) of fine wastes of processing serpentinite raw materials, a hopper-doser (34) of an inert filler, for example, wood sawdust, a magnesia dosing tank

milk (35) and a metering tank (36) of the spent absorption liquid from the gas treatment unit (8) of a salt chlorinator (7), the outlet from the mixer is directed to a heated device for forming and pressing blocks (37).

The totality of the above structural elements, according to the proposed “Hardware-technological system for processing titanium-containing concentrates”, their relative position and a certain relationship between the installed technological equipment increase the efficiency of the “System”, increase its vanadium productivity and make it possible to neutralize the resulting production waste from toxic metals.

IMPLEMENTATION OF THE SUGGESTED USEFUL MODEL

Developed - according to the proposed utility model, the technical solution - "Hardware-technological system for the processing of titanium-containing concentrates" works and is operated as follows.

The initial titanium-containing concentrates as which can be used ilmenite (FeTiO ₃ ) and / or ilmenorutilic concentrates (FeO * 2TiO ₂ ) (50-65% TiO ₂ ) are mixed in the device (2) to prepare the composite mixture (2) with a carbon reducing agent, crushed anthracite, petroleum or pitch coke with vanadium-titanium oxide technogenic raw materials (2-5% V ₂ O ₅ ) coming from the metering hopper (16) and from the storage tank (17). The resulting composition is loaded into an ore-thermal furnace, electric melting is carried out at 1600-2000 ° C. Under these conditions, as a result of the occurrence of redox reactions in the ore-thermal furnace, iron predominantly passes to cast iron, into which up to 20% of the total vanadium content in the composite mixture and the micro amount of alloying metals also go

(chromium, manganese, titanium, zirconium, rare and trace metals). Titanium, as well as impurities of chromium, manganese, iron and other metals form titanium slag (80-88% TiO ₂ ). The dust-gas mixture formed in the upper part of the ore-thermal furnace is sent to the installation (3) for cleaning exhaust gases from dust, the collected dust is collected in the collection hopper (4) and then sent for disposal to the mixer (30), in particular to the metering hopper (33). After cooling, the titanium slag is sent to the crushing and grinding unit (5), from which the crushed slag enters the unit (6) for preparing the charge for chlorination in a metal chloride melt. Petroleum and / or pitch coke, sodium and / or potassium chlorides, and / or spent electrolyte of magnesium production electrolyzers working on carnallite raw materials (70-80% KCl, as well as NaCl, MgCl ₂ , MgO, are loaded into the same installation (6) and etc.). In addition, vanadium-titanium concentrate (10-30% V ₂ O ₅ ) is loaded from the supply tank (19) and the metering hopper (18) into the unit (6). The resulting mixture is thoroughly mixed, loaded continuously or periodically into a salt chlorinator (7), where gaseous chlorine — anode chlorine gas of magnesium production electrolyzers — constantly flows. The waste gases of the salt chlorinator (7) are sent to the gas treatment unit (8), and magnesia milk (up to 100-150 g / dm ³ MgO) obtained from the waste from processing serpentinite raw materials in a tank (26) is used as an absorption liquid. The spent melt from the salt chlorinator (7) is periodically (2-3 times per shift) poured into a hydro-removal bath (7-1), into which water and / or circulating solutions enter the circulation tank (21) with the melt: aqueous phase ratio = 1 : (8 ÷ 12). The pulp formed in the hydraulic removal bath (7-1) is first sent to a hydraulic sump (20), in which a coarse (“sand”) fraction of the insoluble residue of the non-chlorinated portion of the charge entering the salt chlorinator (7) from unit (6) is released. From the sump, chloride pulp enters

a circulation tank (21), from where again the pulp is pumped into the hydraulic removal bath for “hydraulic washing out” of the next batch of spent melt drained from the salt chlorinator (7). Thus, the circulation is carried out 4-6 times until the formation of a metal chloride saturated in total (KCl, NaCl, MgCl ₂ , FeCl ₂ , FeCl ₃ , CrCl ₃ , AlCl ₃ , chlorides and oxychlorides of other metals Zr, Sc, Th, Ti, Zr, Nb, Ta, etc.). In the process of pulp circulation, wastewater from the section (14) for production of vanadium pentoxide - V ₂ O ₅ from vanadium oxytrichloride, in particular mother liquors and promoters of ammonium metavanadate NH ₄ VO ₃ , containing up to 1-2 g / dm ³ vanadium. After the formation in the circulating tank (21) of the total amount of metal chlorides saturated, the solution (pulp) is supplied through the lower discharge pipe (23) to the reactor (24) to neutralize and precipitate the amount of metal oxyhydrates. To neutralize these solutions and purify them from Fe, Cr, Mn, Al, Ti, Zr, Th, S, and other metals, magnesia milk is pumped into the reactor (24) from a container with a stirrer (26) and a batcher (25) (up to 100 -150 g / dm ³ MgO), prepared in a container (26) with a mixer, into which water is preliminarily poured and from the hopper (26-1), finely dispersed (less than 100-200 microns) wastes from the process of processing serpentinite raw materials are loaded.

After processing the concentrated chloride solutions in the reactor (24) with magnesia milk, the resulting pulp is fed and pumped to the filter press (28), the chloride solution purified from Fe, Cr, Mn, Al, Ti, Zr, Th, S and other metals is dumped into workshop sewer, the precipitate of the amount of metal oxyhydrates after filling the filter press frames is discharged from the filter press frames to the filter press trough (29) and then sent through a hopper (31) to a mixer (30), into which almost all solid and liquid waste - industrial products of titanium production va, in particular through the hopper (32) to the mixer (30) is charged with the insoluble residue from gidrootstoynika (20), baths hydroremoval (7-1) through the hopper (33) to the mixer (30)

load the dust trapped from the dust-gas mixture of the ore-thermal furnace (1) in the installation (3), through the hopper-dispenser (34) into the mixer (30) load the finely ground (finely dispersed - less than 100-200 microns) waste from the processing of serpentinite raw materials, through the hopper - the doser (35) into the mixer (30) is loaded with dry, ground wood waste, for example wood sawdust, through the metering tank (36), magnesia milk (up to 100-150 g / dm ³ MgO) is obtained (for example, pumped), obtained in the tank (26), from the metering tank (37) into the mixer (30) fill (pump) This absorption liquid (HgCl ₂ + MgO, etc.) from the gas purification unit (8) of a salt chlorinator (7). The multicomponent composition in the mixer is thoroughly mixed and then sent to a heated device for subsequent molding and pressing into blocks. As a result of this operation, all titanium production wastes — dust, solid, pasty, liquid, are solidified and converted into blocks of a given shape and given sizes, which are then used as auxiliary building materials, for example, in the construction of foundations, road pavement, etc.

Hardware-technological system for processing titanium-containing concentrates

1. ore thermal furnace (RTP);

2. A device for preparing the initial composite mixture;

3. installation for purification of exhaust gases of the RTP from dust;

4. hopper-collector of captured dust;

5. installation for crushing and grinding titanium slag;

6. Installation for the preparation of a mixture for chlorination in a melt of metal chlorides;

7. salt chlorinator;

7-1. a bath of hydrochloric waste from a salt chlorinator of spent chloride melt;

8. installation for gas purification of flue gas salt chlorinator;

9. equipment for condensation of a gas-vapor mixture;

10. tank collection of technical titanium tetrachloride;

11. Department for chemical and distillation purification of technical titanium tetrachloride from impurities;

12. a container for vanadium oxytrichloride;

13. a container for purified titanium tetrachloride;

14. plot for producing vanadium pentoxide;

15. redistribution for magnesium thermal production of metallic magnesium;

16. bunker-dispenser of technogenic vanadium-titanium raw materials;

17. storage tank for technogenic vanadium-titanium oxide raw materials (for RTP);

18. dosing hopper of vanadium-titanium concentrates;

19. consumable capacity for vanadium-titanium concentrates;

20. A water sump for isolating from the pulp a coarse (“sand”) fraction of an insoluble (non-chlorinated) residue;

21. circulation tank;

22. a nozzle on the lid of the circulation tank for supplying vanadium pentoxide production to the wastewater circulation tank;

23. pipe of the lower discharge of the solution (pulp) from the circulation tank;

24. a reactor for neutralizing and precipitating from a solution the amount of metal oxyhydrates;

25. dosing tank of magnesia milk;

26. a container with a stirrer for the preparation of magnesia milk;

26-1. a bunker with fine waste processing of serpentinite raw materials;

27. bottom discharge of pulp from the reactor to neutralize and precipitate the amount of metal oxyhydrates;

28. filter press for separating the amount of metal oxyhydrates from the sludge;

29. trough filter press;

30. mixer;

31. hopper dosing oxyhydrate sediment from the trough of the filter press;

32. hopper-dispenser of insoluble (non-chlorinated) residue isolated in the sump from the original chloride pulp;

33. hopper-batcher of dust trapped from the exhaust gases of the ore-thermal furnace in the installation (3);

34. hopper-dispenser of fine waste processing of serpentinite raw materials;

35. hopper dispenser for an inert filler, such as sawdust;

36. dosing tank of magnesia milk based on wastes of processing of serpentinite raw materials;

37. dosing tank for spent absorption liquid - magnesium chloride solution / pulp from the installation (8) of gas purification of salt chlorinator;

38. heated device for forming and pressing blocks.

Claims (1)

Instrument-technological system for processing titanium-containing concentrates, including an ore-thermal furnace, equipped with a device for preparing the initial composite mixture, an apparatus for cleaning exhaust gases from dust with dust collecting hoppers and an apparatus for crushing and grinding titanium slag, a furnace for preparing a charge for chlorination in a chloride melt metals, salt chlorinator, equipped with a gas treatment plant, equipment for condensation of a gas-vapor mixture with a technical tank titanium tetrachloride, a compartment for chemical and distillation purification of titanium tetrachloride, a container for vanadium oxytrichloride and a container for purified titanium tetrachloride, respectively connected to a site for the production of vanadium pentoxide and redistribution for magnetothermal production of metal titanium, characterized in that the device for preparing the initial composite mixture has a connection with a metering hopper and a storage tank for man-made oxide vanadium-titanium raw materials, installation at preparing a mixture for chlorination in a metal chloride melt is connected to a metering hopper and a consumable container for vanadium-titanium concentrates, the salt chlorinator is equipped with a hydrochloride bath for spent chloride melt, the chloride pulp outlet from the hydrodeburst bath is connected to a series of water traps to isolate the coarse fraction of insoluble residue and , the lower drain of which is connected to the reactor to neutralize and precipitate the amount of metal oxyhydrates, on the lid p the actor has a pipe for supplying vanadium pentoxide production to the wastewater reactor and a pipe for connecting magnesia milk to the metering tank, which is connected to a metering tank and a tank equipped with a magnesia milk stirrer, the metering tank also has a connection to a gas purification unit , the lower discharge pipe of the reactor for neutralization and deposition has a connection with a filter press, the precipitate output of the sum of metal oxyhydrates from the trough of the filter press is directed to a mixer, to which connected to a hopper-batcher of insoluble residue, connected to a water sump, hopper-batcher of dust trapped from the exhaust gases of an ore-thermal furnace, hopper-batcher of finely ground wastes of processing of serpentinite raw materials, hopper-batcher of an inert filler, such as wood sawdust, batcher-dispenser of magnesian milk - a dispenser of spent absorption liquid from a gas purification of a salt chlorinator, the outlet from the mixer is directed to a heated device for forming and pressing blocks.