RussianPatents.com

Method of processing of iron-titanium concentrate. RU patent 2385962.

FIELD: metallurgy.

SUBSTANCE: method includes formation of charge consisting of concentrate and sodium carbonate by means of intergrinding of components and reduction of charge components at presence of taken with excess carbonaceous reducing material at temperature 850-1300°C. Additionally batch material reduction is implemented up to providing of content of metallic iron in the range of particles dimensions 10-300 mcm not less than 80%. Received partly reduced conservative mass, consisting of metalise phase containing main part of iron and vanadium and oxide phase, containing main part of titanium and vanadium, it is grinned up to size not more than 300 mcm. Then it is implemented leaching of vanadium from reaction mass and leaching residue is separated from vanadate solution. After separation residue of leaching is subject to gravitational separation in water flow with separation of metalised and oxide phases. Metalised and oxide phases are separately subject to wet magnetic separation for receiving of metallic iron and titanium oxide concentrate. Additionally wet magnetic separation is implemented in the range of field intensity 20-300 E.

EFFECT: increasing of extraction of iron and titanium oxide.

7 cl, 4 dwg, 6 ex

IPC classes for russian patent Method of processing of iron-titanium concentrate. RU patent 2385962. (RU 2385962):

C22B5/10 - by solid carbonaceous reducing agents

C22B34/22 - Obtaining vanadium

C22B34/12 - Obtaining titanium

C22B1/02 - Roasting processes (C22B0001160000 takes precedence);;

Another patents in same IPC classes:

Reduction method of metal and oxygen compositions / 2360982
At reduction of metal and oxygen composition effect as reducer, herewith at first stage gaseous CO is passed into reaction chamber, containing specified composition of metal and oxygen. In conditions, providing conversion of CO into solid carbon and carbon dioxide, formed solid carbon is introduced into metal and oxygen composition. At the second stage solid carbon, which is introduced into metal and oxygen composition at the first stage, reduces metal and oxygen composition. Additionally at the second stage it is, at least, the first material- promoter, conducive reduction of specified metal and oxygen composition. Additionally the first material- promoter contains the first metal- promoter and/or composition of the first metal- promoter.

Method of tin manufacturing from cassiterite concentrate / 2333268
Invention concerns tin metallurgy field and can be used for tin manufacturing while treatment of cassiterite concentrates. Method of tin manufacturing from cassiterite concentrate with content of 35-50% SnO2 includes batch preparation by blending of tin concentrate with coal and flux additive. In the capacity of flux additive it is used sodium carbonate and sodium nitrate. Melting is implemented at temperature 850-1000°C during 2 hours. For mentioned concentrate it is kept up following mass ratio: concentrate : coal : sodium carbonate : sodium nitrate, equal to 1 : (0.2-0.25) : (0.12-0.15) : (0.06-0.08). It allows without concentrate pretreatment to provide tin manufacturing of 98% purity at less in comparison with tradition approach, temperature.

Method of reduction of metal oxides / 2317342
Charge in form of mixture of oxides and reductant is fed to heated furnace and is mixed in way of temperature rise at passage of gas mixture through charge in way of temperature rise. Size of particles of oxides does not exceed 2-4 mm. Used as reductant are hydrocarbons and/or oxygen derivatives of hydrocarbons and/or their polymers. Reduction process is completed within range of temperatures of forming final product at preset phase state.

Method of production of cleaned coal for metallurgical processes and method of production of reduced metal and slag containing oxidized non-ferrous metal with the use of this coal / 2302450
Proposed method is based on use of cleaned coal for production of high-quality reduced metal. Coal is first kept in organic solvent simultaneously with heating, thus obtaining cleaned coal suitable for metallurgy which possesses higher thermoplasticity as compared with starting coal. Then, mixture of cleaned coal and starting material is subjected to agglomeration in agglomerator and agglomerate thus obtained is reduced at heating in furnace provided with movable hearth; then, it is molten by further heating, thus obtaining reduced melt which is cooled and hardened in furnace provided with movable hearth, thus obtaining solid material, after which reduced solid material is withdrawn from furnace. Then, slag is removed with the use of screen and reduced metal is extracted.

Method of vanadium-bearing raw material processing / 2374345
Invention relates to technology of rare metals, particularly to method of processing of vanadium-bearing raw material: vanadium ores, vanadium-bearing slag of metallurgical manufacturing, treated vanadium catalysts and, particularly to complex treatment of Karatau quartzites by hydrometallurgy method. Method of processing of vanadium-bearing raw material includes acid leaching, sorption by resin of vanadium, uranium and phosphorus from solutions of leaching up to saturation of resin by vanadium, desorption of vanadium from resin and receiving of vanadium oxide. Additionally it is implemented double-circuit saturation of resin by vanadium: originally up to 200-250 g/kg by means of sorption from leaching solutions. Then it is complete saturate up to 450-650 g/kg by treatment b solutions of vanadic acid containing not less than 15 g/l of vanadium oxide, with simultaneous extraction of uranium and phosphorus into mother solution. Desorption of vanadium from resin saturated by vanadium up to 450-650 g/kg is implemented by method of solid-phase or liquid-phase desorption. In the capacity of vanadic acid there are used strippings of liquid-phase desorption or solutions prepared from vanadate of ammonium.

Method of vanadium-bearing raw material processing / 2374344
Invention relates to technology of rare metals, particularly to method of processing of vanadium-bearing raw material: vanadium ores, vanadium-bearing slag of metallurgical manufacturing, treated vanadium catalysts, fuel-oil residues by hydrometallurgical methods and, particularly to complex treatment of Karatau quartzites by percolation leaching methods. Method of processing of vanadium-bearing raw material includes two-stage heap leaching of vanadium, sorption of vanadium from efficient solutions, complete consolidation of circulating manifold of sorption of sulfuric acid and its feeding to leaching. Before leaching raw material is laid into heap with simultaneous blending with vitriol oil with consumption not less than 30 kg/t and is leached at the first stage by circulating manifolds of sorption with water concentration 3.5-4.5 l/m2hour and cycles number not less than 3. Complete consolidation of circulating manifolds by sulfuric acid is implemented up to its content 8.0-8.5% and fed to heap at the second stage of leaching.

Method of vanadium extracting of water sodium-bearing solutions / 2374343
Invention relates to methods of vanadium sedimentation from water solutions and can be used in hydrometallurgy of rare refractory metals, particularly receiving of vanadium oxide (V+5) of high purity. Method of vanadium extraction from sodium-bearing solutions includes electrodialysis of solution for membrane withdrawal of sodium cation from solution and sedimentation of ammonium pol-vanadate. Electrodialysis is implemented at circulation of solution through working chamber of electrodialysis apparatus and at achievement of pH 6.5-7.5 circulating solution is treated by ammonia water or ammonia. Treatment is implemented up to molar ratio Na:V<0.1.

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 of preparation of slag-soda charge containing vanadium for oxidising roasting and processing line for this process / 2365650
Invention relates to the method and device of preparation slag-soda charge containing vanadium for oxidising roasting. The method involves crushing the slag, magnetic separation, breaking, mixing it with chemical additives for the follow-up roasting. Before roasting the resulting mixture is granulated, and the slag is crushed in several steps classifying the slag into size groups. The first step is preparatory when the slag is crushed into pieces of 200 mm maximum. The second step is when the slag is crushed into pieces of 80 mm maximum, and the slag is classified into the following fractions: +80 mm, 10-80 mm and - 10 mm. During the third step the resulting fraction of 10-80 mm is crushed on the rotary crusher in the closed cycle with the vibration onesieve sizing screen with the sieve cells of 10×10 mm. Then the fraction of 10 mm is mixed with the early obtained fraction of 10 mm and processed in two steps. Step 1 does centrifugal crushing and seperation to achieve pieces of 0.15 mm that go through the centrifugal crushing and air centrifugal separation in Step 2. The slag with 0.06-0.15 mm pieces is supplied to the dosing and mixing unit to determine the content of vanadium pentoxide in the slag depending on which the required amount of chemical additives and soda is supplied to be mixed with the slag.

Method of recovery of vanadium from titanium-vanadium slag / 2365649
Invention relates to metallurgy, namely to a method of recovery of vanadium from titanium-vanadium slag obtained at the time of processing titanium-vanadium concentrates using methods of obtaining iron. The method involves breakage of slag, oxidising roasting with conversion of vanadium into a soluble form, cooling of the roasted slag and leaching it to extract vanadium in the solution. The slag is roasted at a temperature of 1050-1150°C during 15-45 min. If the slag contains more than 8% of CaO, roasting requires no additives. If the slag contains less than 8% of CaO, roasting requires CaCO3 in the amount of 5-15% of the slag weight. After cooling the roasted slag is leached with sulfuric acid at pH - 2.5-3.0 during 10-20 min.

Method of vanadium extraction / 2358029
Invention can be implemented for extraction, purification and concentration of vanadium, for example at processing re-circulated mother solutions of production V2O5 and acid solutions of leaching ashes after black oil burning. The method of extracting vanadium from weak-acid mediums consists in extracting with nitrogen containing extracting agent, in the capacity of which N-(2-hydroxy-5-nonylbenzyl)-ββ-dihydroxyethylamine (NBEA) is used in organic diluter. After extraction re-extraction of vanadium is performed with ammonia solution.

Method of producing vanadium pentoxide / 2351668
Invention refers to method of producing high-quality vanadium pentoxide from hydrated deposited industrial vanadium pentoxide. Method includes as follows. Deposit is filtered, washed with water with following reagent processing by calcium-containing salt solutions to recover it from manganese. Reagent processing is enabled in ratio 3.0-8.5 g Ca2 + per 1 g MnO. Produced is supplied to reagent processing of new portions of hydrated deposited industrial vanadium pentoxide in the same Ca2 + to MnO ratio. As manganese is accumulated in solution, it is regenerated with adding calcium hydroxide suspension, containing CaO, or slaked lime of consumption 1.0-1.45 g CaO per 1 g MnO in stirring. After that manganese concentrate is isolated. Liquid phase is delivered back to reagent processing of new portions of hydrated deposited industrial vanadium pentoxide.

Method of vanadium extraction / 2348716
Invention concerns hydrometallurgy. Particularly it concerns method of vanadium extraction. Method includes leaching of vanadium-bearing material by water solution of soda with receiving of alkaline vanadium solution. Received solution is mixed with monohydric alcohol and implemented aliquation of formed mixture for two phases: upper - soda-alcohol, which is subject to regeneration, and bottom - in the form of sodium vanadate solution, where it is concentrated vanadium. Then phase separation is implemented. From bottom phase it is precipitaled vanadium by means of addition to it and mixing with ammonium salt of ammonium carbonate, taken in 1-3-fold amount with respect to stoichiometric quantity, necessary for formation of ammonium vanadate. Ammonium vanadate is dried and burnt for receiving of vanadium pentoxide.

Method of extraction of vanadium out of after burning waste of sulphuric black oil / 2334800
Invention refers to non-ferrous metallurgy and can be used for extraction of vanadium out of ashes which is waste produced by burning of sulphuric vanadium containing black oil in heat engines of heat and hydropower stations. The method consists in the following: source ashes are mixed with sodium carbonate and water at a weight ratio of 100:(10-60):(30-50), then produced mixture is held at temperature of 100-150°C, preferably 115-120°C, during 2 hours. Vanadium is leached out of produced self-diffusing cake with water at temperature of 95-100° and a ratio of liquid: solid = (1.5-3):1.

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.

Rolling method of silica-titanic concentrates / 2382094
Method is implemented by means of chlorination with carbonaceous reducing agent. Additionally initial silica-titanium concentrate with content of titanium dioxide 45-68% and silicon dioxide 25-50% is prepared, mixing with carbonaceous reducing agent in its weight ratio (2-4):1, it is provided uniformity of charge by means of preliminary selection of concentrate and reducing agent size. The charge is subject to thermal treatment or treatment in field of high-temperature arc plasma in reducing environment up to initial stage carbidation of silicon oxide. Chlorination is implemented at temperature 700-1200°C with receiving of tetrachlorides of titanium and silicon, it is divided and cleaned them for following treatment into metals, metal oxides and other compositions of particular elements with return of circulating chlorine to chlorination.

Device for receiving of spongy titanium / 2382093
Device includes crucible-reactor with cover and branches, exhaust device, false bottom, implemented in the form of perforated sheet with cuts by edges, located on bottom supports. Additionally perforated sheet is implemented at edges with platforms, formed by cuts. Bottom supports are implemented with openings for fixation of perforated sheet in horizontal position on bottom supports by means of bars, passed through openings of bottom supports and thrown on platforms of perforated sheet. Platforms, formed by cuts, are located evenly by all edge of perforated sheet. By edge of perforated sheet it is located not less than four platforms, located on-the-mitre 90° to each other.

Remelting method of titanic sponge or powder and device for its implementation / 2382092
Method of remelting of titanic sponge or powder is in that titanic sponge or powder is uninterruptedly fed in vacuum into fireproof melting crucible. After melting by radiation of optical-quantum generator of high power density - laser it is formed titanic ingot, providing continuous runoff of titanium melt into water-cooled ingot mould. Device contains evacuated vessel. In it is installed bin with titanic sponge or powder, fireproof melting crucible, transporter uninterruptedly fed of titanic sponge or powder into fireproof melting crucible, optical-quantum generator of high power density - laser for remelting by radiation of titanic sponge or powder and continuous runoff of titanium melt into water-cooled ingot mold.

Method of titanium-bearing raw material processing / 2379365
Method includes preparation of charge, its loading into chlorinator with melt of metals chlorides, chlorination by feeding of chlorine-containing agent through 4 chlorine lead-in into melt of metals chlorides with continuous innovation of melt with receiving of gas-vapor mixture, containing titanium tetrachloride. Then it is implemented saline cleaning of gas-vapor mixture by saline melt of alkaline metals chlorides and cleaning in spray scrubber with condensation of admixtures chlorides in pulp of liquid titanium tetrachloride, used in the capacity of reflux liquid in scrubber, circulation of formed pulp in circuit of spray scrubber in circuit of chlorinator, extraction of titanium tetrachloride by condensation in direct-contact condenser. Additionally chlorination is implemented with usage in the capacity of chlorine-containing agent of chlorine gas and/or anodic chlorine-gas, pulp at first is contact to waste from chlorinator by gas-vapor mixture, and then with melt mirror by metal chlorides. Saline cleaning of gas-vapor mixture is implemented by means of contacting of gas-vapor mixture contact, escaping from chlorinator with surface of melt of alkaline metals chlorides at keeping of melt temperature 350-400°C, concentration of free alkaline metals chlorides 0.5-3.0 wt % and with processing of surface coating of melt by gas stream of inert gas at a rate of feeding 40-120 m3/hour.

Method to process titanium-silicon-containing stock / 2377332
Invention relates to metallurgy and can be used for desiliconization of mineral stock, production of artificial rutile, silicon dioxide and modification of its surface. Proposed method comprises initial stock fluorination by fluorine-containing ammonium salt to produce fluorinated mass containing mix of silicon and titanium compounds. Fluorination over, said mix is separated to produce commercial products based on titanium and silicon dioxides. Initial stock is fluorinated at 110 to 195°C, or without heating. Aforesaid mix is separated by sublimation of ammonium silicon fluoride at 305 to 450°C, or by water leaching.

Method of producing titanium dioxide / 2377183
Invention can be used in production of titanium dioxide when processing material which contains titanium and iron, for example ilmenite concentrates. The method of producing titanium dioxide involves the following steps: (a) reacting iron-containing titanium ore with an aqueous solution of NH4F at temperature 100-120°C, pressure of 1-2 bars and pH of approximately 6.5-7.0; (b) filtering the obtained aqueous suspension with subsequent separation into a precipitate fraction which contains ammonium fluoroferrates, and a filtrate fraction which contains ammonium fluorotitanates; (c) hydrolysis of the obtained filtrate fraction thereby obtaining a solid component which is ammonium fluorooxotitanate; (d) thermal hydrolysis of the solid component obtained at step (c).