RU72975U1 - TECHNOLOGICAL LINE FOR PROCESSING TITANIUM RAW MATERIALS - Google Patents

Abstract

The proposed utility model relates to the field of metallurgy, in particular to the metallurgy of titanium and vanadium, and can be specifically used in existing titanium-magnesium industries for the production of titanium metal - titanium sponge, vanadium compounds -VOCl ₃ and V ₂ O ₅ , for processing and disposal generated multicomponent polymetallic waste products. The objective of the proposed utility model is to increase the specific power of the processing line for vanadium while solving environmental issues. The technical result that can be obtained by implementing the utility model is to prevent environmental pollution by highly toxic production wastes and to provide an increase in the output of commercial vanadium compounds - VOCl ₃ and / or V ₂ O ₅ . The problem is solved with the achievement of the above technical result by the proposed utility model - “Technological line for the processing of titanium raw materials”, including an ore-thermal furnace equipped with a plant for preparing the initial titanium raw materials, a mixing device for preparing a charge for chlorination of titanium slag, a salt chlorinator equipped with a waste water recovery bath the melt, the condensation system of the vapor-gas mixture, the separation of distillation-chemical treatment of technical tetra titanium chloride, a collection of titanium tetrachloride purified from impurities of foreign metals and a container for vanadium oxytrichloride, a set of equipment for magnetothermally producing titanium, a hydrometallurgical department for the decomposition of vanadium oxytrichloride

crystallization of ammonium metavanadate and obtaining vanadium pentoxide. New in the proposed utility model is that the installation for the preparation of the initial titanium raw material has connections through shut-off and control valves with a series-installed dispenser and a receiving and storage tank of vanadium-, titanium-, iron-containing technogenic raw materials. The spent melt water removal bath has a connection to the circulation tank, on the cover of which there is a pipe connected to the vanadium-containing wastewater pipeline for the production of ammonium metavanadate, the lower discharge of the circulation tank is connected to the reactor to neutralize and neutralize the solutions and wastewater, and there is a pipe for supplying the reactor cover milk of lime, the discharge of the oxyhydrate pulp formed in the reactor is directed to a filter press, from which chloride, purified from heavy metals, is withdrawn th solution is directed into the sewer.

Description

The proposed utility model relates to the field of metallurgy, in particular to the metallurgy of titanium and vanadium, and can be specifically used in existing titanium-magnesium plants for the production of titanium metal - a titanium sponge, vanadium compounds - VOCl ₃ and V ₂ O ₅ , for processing and disposal generated multicomponent polymetallic waste products.

Known (V.V.Sergeev, N.V. Galitsky, V.P. Kiselev, V.M. Kozlov. Metallurgy of titanium. M .: Metallurgy, 1971-320 p.) "Technological line for processing titanium raw materials", including ore-smelting furnace for smelting reduction of ilmenite concentrate to obtain the titanium slag, salt chlorinator, condensing system of the gas-vapor mixture to form the technical titanium tetrachloride, the separation of (portion) rectifying-chemical cleaning technical TiCl ₄ from impurities, including from vanadium compounds, complex equipment for magniete namic producing titanium metal (titanium sponge).

A disadvantage of the known production line is the absence in its composition of a specialized department (section or installation) for the selective extraction of vanadium. Another disadvantage is the lack of the necessary equipment in the production line for processing and neutralizing chloride waste from the production of titanium tetrachloride generated in a salt chlorinator.

Similar technological lines with the above disadvantages are also described in other sources of information (V.A. Garmata, B. S. Gulyanitsky, V. Yu. Kramnik and others. Metallurgy of titanium.

M .: Metallurgy, 1968 - 644 p .; V.V.Sergeev, A.B. Bezukladnikov, V.M. Malypin. Metallurgy of titanium. M .: Metallurgy, 1979 - 264 p .;

V.A. Garmata, A.I. Petrunko, N.V. Galitsky and others. Titanium. M .: Metallurgy, 1983-580 p.).

Of the known analogues, the closest in technical essence and the technical result achieved with this is the well-known (A.V. Tarasov. Metallurgy of titanium. M .: IKC "Akademkniga", 2003 - 326 p.) "Technological line for processing titanium raw materials" - adopted for PROTOTYPE.

A technological line for processing titanium raw materials according to the prototype includes an ore-thermal furnace equipped with a plant for preparing initial titanium raw materials, a mixing device for preparing a charge for chlorination of titanium slags, a salt chlorinator equipped with a hydromechanical waste melt removal bath, a vapor-gas mixture condensation system, a distillation-chemical purification unit for technical titanium tetrachloride, a collection of titanium tetrachloride purified from impurities of foreign metals and a container for oxy rihlorida vanadium complex equipment for producing magnesium-titanium hydrometallurgical separation decomposition oxytrichloride, vanadium, ammonium metavanadate crystallization and obtain vanadium pentoxide.

The prototype production line provides:

- obtaining a high-quality titanium sponge, corresponding in all respects to aerospace materials;

- selective extraction of vanadium compounds from the feedstock and its preparation in the form of commercial products — vanadium oxytrichloride — VOCl ₃ and / or vanadium pentoxide — V ₂ O ₅ .

The disadvantage of the technological line of the prototype is the lack in its composition of equipment for processing and disposal

production waste generated during the chlorination of titanium slags and in the purification of technical titanium tetrachloride from impurities, including vanadium-containing waste.

Another disadvantage of the prototype production line is the relatively small volume of production of commercial vanadium compounds —VOCl ₃ and / or V ₂ O ₅ , which is associated with a low concentration of vanadium compounds in the initial processed raw material — ilmenite concentrate.

The objective of the proposed utility model is to increase the specific power of the processing line for vanadium while solving environmental issues.

The technical result that can be obtained by implementing the utility model is to prevent environmental pollution by highly toxic production wastes and to provide an increase in the output of commercial vanadium compounds - VOCL ₂ and / or V ₂ O ₅ .

The problem is solved with the achievement of the above technical result by the proposed utility model - "Technological line for processing titanium raw materials" (see. Fig.), Including ore-thermal furnace (1), equipped with a plant for preparing the initial titanium raw materials (2), a mixing device for preparing the charge for chlorination of titanium slag (3), a salt chlorinator (4), equipped with a hydro-removal bath (5) of the spent melt, a condensation system of a gas-vapor mixture (6), a distillation-chemical treatment unit technical titanium tetrachloride (7), a collection of titanium tetrachloride purified from impurities of foreign metals (8) and a container for vanadium oxytrichloride (9), a complex of equipment for titanium magnetothermal production (10), a hydrometallurgical department for the decomposition of vanadium oxytrichloride, crystallization of ammonium metavanadate and production vanadium pentoxide (11). New in the proposed utility model is that the installation for the preparation of the initial titanium raw material has compounds through the locking-regulating

reinforcement (12) with a sequentially installed dispenser (13) and a receiving and storage tank of vanadium-titanium-iron-containing technogenic raw materials (14). The spent melt water removal bath (5) has a connection to the circulation tank (15), on the cover of which there is a pipe (16) connected to the pipeline of vanadium-containing wastewater of the ammonium metavanadate production process, the lower discharge of the circulation tank (15) is connected to the reactor for neutralization and neutralization solutions and wastewater (17), on the reactor cover there is a nozzle for supplying milk of lime, the discharge of the oxyhydrate pulp formed in the reactor is directed to a filter press (18), the output of which is purified from heavy Ferrous materials chloride solution is directed into the sewer.

The above set of equipment according to the proposed technical solution provides, on the one hand, an increase in the output of commercial vanadium compounds, and on the other hand, it helps to prevent environmental pollution by production waste generated during the chlorination of titanium slags and upon receipt of commercial vanadium compounds.

IMPLEMENTATION OF THE SUGGESTED USEFUL MODEL

The developed production line operates and is operated as follows.

Carbon reducing agent (petroleum or pitch coke), initial titanium raw material, for example ilmenite concentrate, are loaded into the installation (2) for preparing titanium raw materials, and from the collection and storage tank (14) through the batcher (13) and shut-off and control valves (12) into Installation (2) is loaded with a V-Ti-Fe-containing technogenic oxide raw material - various industrial wastes and / or industrial products containing 1-5% V ₂ O ₅ . Amount of technogenic raw materials (waste

production), loaded into the installation (2), is 3-15% of the mass of the initial titanium raw material (ilmenite concentrate). After thorough mixing, the resulting composition is fed into an ore-thermal furnace (1). Reducing ore thermal smelting is carried out at 1800-2000 ° C. As a result of melting, iron (II and III) is reduced to metal and mainly forms its own phase - cast iron. Up to 10-20% vanadium and a small amount of impurities of alloying metals - Ti, Cr, Mn, rare and scattered metals also go into cast iron. At the end of the melting process, the titanium slag is cooled, crushed, crushed and loaded into a mixing device (3), where sodium and / or potassium chlorides are also loaded. The loaded composition is mixed until a homogeneous mass is formed and then continuously or periodically fed into a salt chlorinator (4). Chlorination is carried out at 750-800 ° C. Periodically - as the viscosity increases, the melt from the chlorinator (4) is poured into the hydro-removal bath (5). The vapor-gas mixture formed during chlorination is fed into the condensation system (6). Technical titanium tetrachloride released - condensed in the condensation system (6) is sent to the department of distillation-chemical treatment of TiCl ₄ (7). Titanium tetrachloride, purified from impurities, is collected in a collection (8), and vanadium oxytrichloride in a container (9). Purified TiCl _{4 is} sent to obtain titanium metal (titanium sponge) by the magnetothermic method (10). Vanadium oxytrichloride is partially sold as a commercial product in consumers and partially sent to a specialized hydrometallurgical section (department) (11) for decomposition of VOCl ₃ , crystallization of NH ₄ VO ₃ , separation of the precipitate from the mother liquor and its washing. Promoters and mother liquors are directed (pumped) into the circulation tank (15) through the pipe (16). When the solution (pulp) is circulated in the hydraulic removal bath system (5) - circulation tank (15), the solution is concentrated and after 5-6 circulation cycles - the formation of saturated

the sum of the metal chlorides of the solution. The resulting solution (pulp) from the circulation tank (15) is fed (pumped) into the reactor (17) with a stirrer to neutralize the solution and precipitate the amount of metal oxyhydrates. For this, lime milk (80-150 g CaO / dm ³ ) is fed into the reactor (17) through a special pipe. The oxyhydrate pulp formed in the reactor (17) is directed (pumped) to a filter press (18), purified of heavy metal ions (Fe, Cr, Mn, V, etc.) and small amounts of Ti, Al, and others. The chloride solution is discharged into workshop sewer. The precipitate of the amount of metal oxyhydrates after filling the frames - filter press (18) is dumped first into the trough of the filter press, then into the plugs, after which this precipitate is taken to landfill, or sent for disposal - to obtain building materials, for additional extraction of valuable components, etc.

The implementation of the proposed utility model in the above conditions provides:

- a significant increase in the capacity of the production line for vanadium and, as a result, makes it possible to significantly (several times) increase the output of commodity vanadium compounds - VOCl ₃ and / or V ₂ O ₅ ;

- utilization at the stage of ore-thermal smelting of highly toxic vanadium-containing production wastes as technogenic raw materials;

- processing and disposal of waste generated during the chlorination of titanium slags and, at the same time, wastewater from vanadium production - mother liquors and the production of ammonium metavanadate.

Processing line for the processing of titanium raw materials

1 - ore thermal furnace;

2 - installation for the preparation of initial titanium raw materials;

3 - mixing device for the preparation of a mixture for chlorination of titanium slag;

4 - salt chlorinator;

5 - a bath of hydraulic removal of the spent melt;

6 - condensation system of gas-vapor mixture;

7 - Department of distillation-chemical treatment of technical titanium tetrachloride;

8 - a collection of titanium tetrachloride purified from impurities of foreign metals;

9 - capacity for vanadium oxytrichloride;

10 - a complex of equipment for magnetothermal production of titanium;

11 - hydrometallurgical department for the decomposition of VOCl ₃ , crystallization of NH ₄ VO ₃ and obtain V ₂ O ₅ ;

12 - shut-off and control valves;

13 - dispenser;

14 - receiving and storage capacity of vanadium-, titanium-, iron-containing technogenic raw materials;

15 - circulation tank;

16 - pipe connecting the pipeline with vanadium-containing wastewater of the process of obtaining NH ₄ VO ₃ and V ₂ O ₅ from VOCl ₃ ;

17 - reactor for neutralization and neutralization of solutions and wastewater;

18 - filter press.

Claims (1)

A technological line for processing titanium raw materials, including an ore-thermal furnace equipped with a plant for preparing initial titanium raw materials, a mixing device for preparing a charge for chlorination of titanium slags, a salt chlorinator equipped with a hydromechanical bath for removing the spent melt, a vapor-gas mixture condensation system, a distillation-chemical treatment unit for technical tetrachloride titanium collection of titanium tetrachloride purified from impurities of foreign metals and a container for oxytrichloride vanadium, a complex of equipment for the magnetothermal production of titanium, a hydrometallurgical department for the decomposition of vanadium oxytrichloride, crystallization of ammonium metavanadate and the production of vanadium pentoxide, characterized in that the installation for preparing the initial titanium raw material has a connection through shut-off and control valves with a series-installed dispenser and receiving and storage with a capacity of vanadium-, titanium-, iron-containing technogenic raw materials, a bathtub for hydraulic removal of spent melt has a connection with a circulation tank, on the cover of which there is a pipe connected to the pipeline of vanadium-containing wastewater of the process for producing ammonium metavanadate, the lower discharge of the circulation tank is connected to the reactor to neutralize and neutralize solutions and wastewater, on the reactor cover there is a pipe for supplying milk of lime, a drain formed in the oxyhydrate pulp reactor, is directed to a filter press, the output from which the chloride solution purified from heavy metals is sent to the sewer.