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RussianPatents.com
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Wear-and-corrosion-proof iron-based powder Proposed composition contains the following substances, in wt %: chromium - 0.5-6.9, nickel - 0.5-3.9, molybdenum - up to 1.5, carbon - up to 1.0, copper - up to 10-25, iron making the rest. |
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Method of smelting in dc arc furnace Proposed method comprises charging the initial material into furnace and switching on of power supply to feed current through graphitised electrode and metal melt formed by electric arc via at least one closed electric circuit. Electromagnetic field is excited in said melt to mix it. At the start of electrosmelting, after switching of power supply, current density nearby graphitised electrode working end is set equal to 24 A/cm2, not over. Then, at steady current density, electric arc pressure to metal melt is increased by arc length variation and arc pressure increase is terminated at forming of recess with metal wavy displacement therefrom at metal surface. Now, at steady conditions, electrosmelting is executed at control and maintenance of steady current density and arc length to maintain required pressure to metal melt surface. |
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Running of electrosmelting initial stage in dc arc furnace Proposed process comprises loading the charge in furnace and switching on of furnace power supply. Graphitised electrode is displaced downward to contact with charge by its working end. Arc is fired to feed current via closed electric circuit including said graphitised electrode, electrode gap, charge, at least one hearth electrode with current lead wires and power supply. Note here that current is controlled as well as maximum voltage at power supply output terminals and arc is controlled and optimised by variation of arc length after maximum voltage is reached thereat. Smelting initial stage is terminated after termination of well penetration in the charge. During the entire stage of initial smelting, current density in graphitised electrode does not exceed 20 A/cm2 while electrode working end is displaced deep down the well unless the completion of well penetration in the charge. |
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Method of purifying phosphate-fluoride concentrate of ree Invention relates to purification of a phosphate-fluoride concentrate of rare earth elements (REE), obtained in the complex apatite processing. A method of purification of the phosphate-fluoride concentrate of REE, which contains admixtures of calcium and thorium, includes processing of the concentrate with a solution of sulphuric acid with a concentration of 4-6 wt % in the presence of sulphoxide cationite. REE, admixtures of thorium and calcium are absorbed by sulphoxide cationite, transfer of fluorine together with phosphorus into the sulphuric acid solution, separation of the sulphuric acid solution from sulphoxide cationite, desorption from cationite of REE and admixtures of thorium and calcium with an ammonium salt solution with obtaining desorbate and its neutralisation with an ammonium compound in three stages. At the first stage neutralisation is carried out until pH 4.2-5.0 is achieved with formation and separation of a thorium-containing residue, at the second stage - until pH 7.0-7.5 is achieved with formation and separation of a concentrate of REE, and at the third stage - until pH not less than 8.5 is achieved with formation and separation of a calcium-containing residue. |
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Method of processing solid household and industrial wastes and device for its realisation Device contains successively installed a feed hopper, an open hearth furnace, an afterburning chamber, a recuperator of combustion air heating, a heat recovery unit, a smoke exhauster and a smokestack, means for fuel supply. The furnace is provided with a bag filter for purification of flue gases from dust and a catalytic apparatus for purification of flue gases from carbon oxides and nitrogen oxides. The catalytic apparatus consists of a vertical case with a conic bottom, inside which from top to bottom placed are: a vertical heat-exchanger, a liquid distributer, an absorption section, a desorption-cooling section, an aspiration hood with a fan and a Venturi tube. A method includes preparation of a charge in the form of a mixture of wastes with flux, loading of the charge and its melting in a bath of the open hearth furnace at a temperature of 1450-1500°C. Performed are: discharge of released combustible components into the afterburning chamber with heat recovery of flue gases, purification of flue gases from dust in the bag filter, purification of smoke gases from carbon oxides and nitrogen oxides is performed in the catalytic apparatus. |
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Metal coating with binder that features high temperature of gamma/gamma' transition and the part Metal coating of nickel-based alloy for gas turbine parts contains γ and γ' phase and, optionally, β phase. Note here that said alloy contains the following substances, in wt %: tantalum - 0.1-7.0, cobalt - at least 1, chromium - 12-22, preferably, 15-19, aluminium - 5-15, preferably, 8-12. Note also that this alloy does not, preferably, contain silicon (Si) and/or hafnium (Hf) and/or zirconium. |
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Production of complex-shape articles from nonferrous metals by superplastic forming Invention relates to metal forming, particularly, to production of parts from metals and alloys that can obtain nano- and microcrystalline structure with specified minimised grain size ensured by preliminary intensive plastic forming of blanks. Proposed method comprises equal channel angular pressing of blanks to get the structure with grain size not over 1.5 mcm. Then, blanks are heated and shaped under super plasticity conditions. Note here that heating is carried out to optimum temperature corresponding to peak at blank material internal friction vs. temperature. Shaping is conducted at temperature deviations not over magnitude defined by design equation. |
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Charge for production of material for high-current contacts and method of its production Proposed composition contains the following substances, in wt %: copper particles - 20-85, titanium hydride particles - 1-10, graphite particles making the rest. To make material billet, this charge is sintered by feeding electric current pulses there through, current density making 200-500 A/mm2, with simultaneous single-axis reduction. |
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Extraction of silver from alkaline cyanide solutions Invention relates to hydrometallurgy of noble metals and can be used for silver extraction from alkaline cyanide solutions by cementation. Proposed method comprises cementation by aluminium as 0.1-2.0 mm thick chips. Cementation is carried out at specific solution feed rate of 1-4 m3/m2·h at concentration of sodium hydroxide of 1.0-10.0 g/l. |
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Method of gamma-aluminide titanium-based alloys production Proposed process comprises production of the mix of powders, forming the pellet therefrom and execution of self-propagating high-temperature synthesis. Obtained the mix of pure metals containing titanium, aluminium, niobium and molybdenum in the following amount, it wt %: aluminium - 40-44, niobium - 3-5, molybdenum - 0.6-1.4, titanium making the rest. This pellet is compacted to relative density of 50-85% and subjected to thermal vacuum processing at 550-560°C for 10-40 min, heating rate of 5-40°C/ min and pressure of 10-1-10-3 Pa while SPS is performed at initial temperature of 560-650°C. |
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Refining of black lead refining of copper Proposed method comprises coarse copper extraction by liquidation and fine copper extraction at the melt temperature of 335-345°C. Said fine copper extraction is carried out by introduction of sulphur into the melt to obtain the chemical compound, melt mixing and removal of chemical compound as the output. Sulphur is heated to 130-150°C and introduced in the melt bottom part in liquid state. |
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Aluminium melt is overheated to 700-720°C and forced through foam filter with open porosity based on aluminium-titanium alloy with titanium content of 5-10%. Application of said alloy for making of foam metal provides for decreased hydrogen content in the melt and its modification owing to titanium dissolution. |
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Proposed chromium-based alloy comprises the following components in wt %: nickel - 20.0-40.0, tungsten - 0.5-5.0, vanadium - 0.05-1.0, titanium- 0.05-1.0, iron - 0.1-5.0, chromium making the rest. Cr/(Ni+Fe) ratio makes 1.5 to 2. This alloy features high ductility at hot deformation temperature. |
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Production of compacted iron modifier based on nano-dispersed powders Proposed method comprises mixing of cryolite and the mix of nano-dispersed powder of oxides of niobium, titanium, zirconium, tantalum with mixing agent and further compaction of said mix. Cross-linking agent represents aqueous solution of glyoxal (40%). Note here that obtained pasty mix is compacted by screw pelletiser to cylindrical pellets to be dried for 3 hours at 80°C at the following ratio of components, in wt %: cryolite - 79-81, niobium oxide - 3-4, titanium oxide - 3-4, zirconium oxide - 4-3, tantalum oxide - 1-2, aqueous solution of glyoxal (40%) - 5-7. |
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Gold extraction from ores and concentrates Proposed method comprises loading initial ground stock into reactor and its processing by cyanide solution with pulp circulation and dispersion by compressed air. Note here that pulp processing involves application two-beam opposite hydroacoustic radiator with opposite fan-shaped radiation of wide-band continuous-spectrum acoustic oscillations and fan-shaped spray of air micro bubble clouds inside the reactor, air being active sucked in rarefaction zone developed by said radiator. |
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Austenite-ferrite high-strength steel Proposed steel contains components in the following ratio in wt %: carbon - up to 0.03, chromium - 8.0-16, molybdenum - 1-5, cobalt - 0-1, aluminium - 1-5, titanium - ≤0.3, lanthanum and yttrium - ≤0.05, iron making the rest. |
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Composite nanomaterial based on metal iron in powers of mesoporous matrix of silica SBA-15 that feature magnetic properties. Mesoporous matrix is impregnated with iron salts to be, then, removed from outer surface and processed by hydrogen in matrix pores till metal iron. Prior to impregnating, said matrix is dried at 200°C, not over. Weight of dried mesoporous matrix is placed in quartz reactor and treated by vapours of trichloraluminium in the flow of dry inert gas for at least 2 hours. Then, feed of said vapours is terminated to go on processing by said inert gas flow for at least 12 hours. Then, weight of mesoporous matrix is processed with water steam in the flow of dry inert gas for at least 2 hours. Then, feed of said vapours is terminated to go on processing by said inert gas flow for at least 12 hours. Thereafter, obtained alumina monolayer is built up many times to preset size of pores and magnetic properties of mesoporous matrix. |
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This process comprises preparation of the charge by mixing the titanium-bearing slag with aluminium and calcium-bearing material. The latter represents calcium fluoride and calcium, of calcium fluoride and calcium oxide, or calcium fluoride and the mix of calcium and calcium oxide. Here, the ratio between titanium dioxide, aluminium powder and calcium and/or between calcium oxide and calcium fluoride makes 1:(0.58-1.62):(0.28-1.1):(0.09-0.32). Besides, it includes reducing fusion of said slag at 1450-1750°C and separation of the alloy from said slag. |
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Plant for gold extraction from ores and concentrates Proposed plant comprises tank with processed material loading and unloading pipes, cyanide solution feed pump and circulation pump. It differs from designs in that it is equipped with at least one two-beam hydroacoustic radiator with fixed direction of acoustic field fitted inside said tank on its vertical axle and communicated with circulation pump inlet. Besides it has air feed pipe combined with cyanide solution feed pipe into common manifold. Outlets of said radiator are located at radiator rarefaction zone. |
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Method of utilisation of solid mercury-containing wastes and device for its realisation Group of inventions relates to utilisation of solid mercury-containing wastes, in particular fluorescent lamps. A method of utilisation of solid mercury-containing wastes includes an oxidation stage with further stand, processing a wastes mixture with a demercurised solution of an alkali metal polysulfide with further stand of the reaction mixture. Wastes are divided into two parts. One part, which contains crushed wastes, is processed with an oxidant, and then with a demercurised iodine-alcohol solution or a sodium sulfide solution. The second part of wastes in the form of aeromixture is passed through a nanoporous carbon sorbent NCMS-J. A device for utilisation of mercury-containing wastes contains a unit of loading and crushing, a purification unit and an aeromixture unit. The purification unit is made in the form of a truncated cone, connected by means of a flange to a cylindrical reservoir with a perforated screw, provided with a valve for the solution discharge, and an upper part of the perforated screw is provided with an unloading flange for discharge into a storage hopper. The aeromixture unit is made in the form of a column type adsorber with the nanoporous carbon sorbent NCMS-J. |
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Method of material manufacturing for arc-quenching and electric break contacts and material Method involves mixing graphite particles clad with niobium carbide or chrome carbide and copper or copper allow powder at the following component ratio, wt %: graphite particles 5-20, chrome or niobium carbide 5-20, copper or copper alloy takes up the rest, with graphite to carbide ratio comprising 0.9-1.1, forming a blanc part out of the mix by pressure compression to density of at least 70% of theoretical value, and further blanc part caking by electric current pulses of 100-300 A/mm2 density with simultaneous uniaxial squeezing of the material. |
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Aa 6xxx aluminium alloy for precision turning Invention relates to components processed by precision turning, said components being obtained from extruded products of the rod, bar or even tube type made from a deformable aluminium alloy for precision turning. The alloy has the following composition, wt %: 0.8<Si<1.5, preferably 1.0≤Si<1.5; 1.0<Fe<1.8, preferably 1.0<Fe≤1.5; Cu <0.1; Mn <1, preferably <0.6; Mg 0.6-1,2, preferably 0.6-0.9; Ni <3.0%, preferably 1.0-2.0; Cr <0.25%; Ti <0.1%; other elements <0.05 each and 0.15 in total, aluminium - the balance. The subject of the invention is also a component made by precision turning of such an extruded product as defined above. |
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Tandem reflecting furnace with casting shoe for remelting of aluminium scrap Furnace includes a housing formed with refractory external side, front and rear end walls, two baths restricted with bottoms, an arch and walls, two drain tap holes, a gas duct and a pedestal, on which all parts are arranged. In the furnace there is external heat insulation of walls, which consists of asbestos tailings and a double layer of asbestos boards. The furnace pedestal has two layers made of light-weight brick with the double layer of asbestos boards between them, a quartz sand layer from below and from above, which is mixed with asbestos tailings, and three layers of asbestos boards on the top, on which bottom block are laid. A casting shoe includes a housing formed with refractory external side, front and rear end walls, a bath, restricted with a bottom, an arch and walls, and drain tap holes. The casting shoe pedestal has two layers made of light-weight brick and separated with an asbestos board layer, and a lower asbestos board layer. The casting shoe has two tap holes made in quick-changeable tap-hole bricks in a box. The furnace has two turning chutes with a turning bowl, which are installed on brackets welded to the casting shoe box, which are turned during liquid metal pouring process for subsequent pouring of molten metal in the furnace to pouring equipment located in a maintenance sector with an angle of 143°. Five injection burners are installed in the furnace and the casting shoe. The furnace operates at natural and artificial draft with a dust and gas cleaning system. |
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Method of producing porous titanium nickelid oxide Invention relates to powder metallurgy, particularly, to continuous production of titanium powder alloys. It can be used in medicine for production of functionally-gradient implants. Powders of nickel and titanium are mixed at equiatomic amounts and compacted to pellets. Pellets are heated in vacuum at heating rate not exceeding 279 K/min to 950-1100 K, held at this temperature and cooled down with the kiln. Obtained cake is milled in ball mill at post critical rate in the medium of isopropanol for 40-48 hours and dried. |
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Thin sheet manufacturing method Manufacturing method of thin sheets from pseudo-alpha titanium alloys involves deformation of an ingot into a slab, mechanical processing of a slab, multipass rolling of a slab for a semi-finished rolled stock, cutting of the semi-finished rolled stock into sheet workpieces, their assembly into a pack and its rolling and finishing operations. Multipass slab rolling is performed at several stages. After the semi-finished rolled stock is cut into sheet workpieces, their finishing operations are performed. Assembly of sheet workpieces into a pack is performed by laying so that direction of sheets of the previous rolling is perpendicular to direction of sheets of the next rolling. Rolling of the pack is performed till a final size, and then, obtained sheets are removed from it and finishing operations are performed. |
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Aluminium strip with high content of manganese and magnesium Invention relates to an aluminium alloy for making substrates for offset printing plates. The aluminium alloy contains the following components in wt %: 0.2% ≤ Fe≤0.5%, 0.41% ≤ Mg ≤ 0.7%, 0.05% ≤ Si ≤ 0.25%, 0.31% ≤ Mn ≤0.6%, Cu ≤0.04%, Ti ≤ 0.05%, Zn ≤ 0.05%, Cr ≤ 0.01%, the balance - Al and inevitable impurities, each present in an amount of not more than 0.05%, and making up at most 0.15%, overall. |
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Method of processing eudialyte concentrate Method involves decomposing the concentrate with inorganic acid to obtain a gel, heat treatment of the gel, regenerating the acid, water leaching the gel with transfer of rare-earth elements into the solution and a zirconium compound into an insoluble residue. The solution is then separated from the residue and the zirconium compound is separated from the residue. The concentrate is decomposed with acid consumption of 90-110% stoichiometric amount, and heat treatment of the gel, water leaching of the gel and acid regeneration are carried out simultaneously in autoclave conditions at temperature of 175-250°C for 1-4 hours to obtain a solution of rare-earth elements containing a free acid. The zirconium compound is separated from the insoluble residue by wet gravity separation. The inorganic acid used is hydrochloric acid or nitric acid. |
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Structural sheet stainless steel having excellent weld corrosion resistance, and its making method Sheet is made from steel containing the following, wt %: 0.01 to 0.03 C, 0.01 to 0.03 N, 0.10 to 0.40 Si, 1.5 to 2.5 Mn, 0.04 or less - P, 0.02 or less - S, 0.05 to 0.15 Al, 10 to 13 Cr, 0.5 to 1.0 Ni, 4×(C+N) or more and 0.3 or less - Ti, Fe and inevitable impurities are the rest; with that, V, Ca and O are controlled in inevitable impurities: 0.05 or less - V, 0.0030 or less - Ca and 0.0080 or less - O. A sheet has an assessment parameter of microstructure of a heat affected zone at welding F and processibility index FFV meeting F=Cr+2×Si+4×Ti-2×Ni-Mn-30×(C+N)≤11, and FFV=Cr+3×Si+16×Ti+Mo+2×Al-2×Mn-4×(Ni+Cu)-40×(C+N)+20×V≤9.0. |
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Mixture of niobium and aluminium powders with fineness of not less than 98% and fraction of aluminium of 1.5 to 45 wt % is subject to mechanical processing in a planetary ball mill at amplification of balls of 100 to 600 m/s2 with duration of 0.5 to 20 minutes. Compaction by twisting under quasi-hydrostatic pressure on Bridgman anvils is performed at the temperature of 10 to 100°C, pressure of 2 to 10 GPa and relative turn of anvils at twisting till shear deformation γ≥50 is achieved. |
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Invention relates to powder metallurgy, particularly, to production of hard alloy body from hard alloy containing tungsten carbide grains and metallic binder comprising cobalt with definite concentration of tungsten dissolved therein. Hard alloy body has bordering surface area and inner area. Note here that mean fraction of binder in inner area is larger than that in surface area. Note here that carbon concentration in the binder is larger in surface area than that in inner area. Note that hard alloy body does not contain eta-phase and free carbon. Concentration of tungsten dissolved in binder in surface area is smaller than that in inner area and defined as (16.1-σt)/0.275, where σt is quotient of had alloy body magnetic moment division by mass fraction of binder in this area. Hard alloy body is produced by forming of unsintered blank containing the tungsten carbide grains distributed in cobalt-containing binder, preliminary sintering at 1000-1280°C for 1-3 hours, thermal treatment in carburising medium and liquid-phase sintering at 1320-1400°C. |
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Charge and method for electric-furnace aluminothermic production of ferroboron using it Charge is proposed at the following component ratio, wt %: boric anhydride 27.3-28.1, iron scale 34.4-35.3, primary aluminium powder 29.2-30.8, burnt lime 4.8-6.4, fluorspar concentrate 0.8-1.0, evaporation sodium chloride 0.8-1.0. When using charge of the proposed composition, an ignition part of charge is loaded onto the bottom of a tilting crucible and ignited with an ignition mixture; after the melt is built up, electric arcs are ignited and batchwise loading of the main part of charge is performed at current load of 3-5 kA during 25-40 minutes as a penetration process proceeds, and after penetration of the main part of charge and deactivation of electric arcs is completed, a deposition part of the charge is loaded and penetrated. After the melting process is completed, the melt is exposed during 5-10 minutes in the crucible till complete deposition of metal drops; after that, some part of slag is poured into a slag pot to the height of 200-250 mm; slag skull is formed on walls of the slag pan, into which the rest melt is poured for final crystallisation of melting products; the obtained ferroboron block is removed from the slag pan and cleaned from slag. |
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Binding metal coating with high gamma/gamma' transition temperature, and component Invention relates to metallurgy, and namely to a metal coating with γ- and γ' phases. The metal coating from nickel-based alloy for gas turbine parts includes γ- and γ'-phases; with that, the alloy contains the following, wt %: iron 0.5-5, cobalt at least 1, chrome at least 1, aluminium at least 1, and when necessary, tantalum (Ta) and/or yttrium (Y). |
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Alloy, protective layer and part Invention relates to metallurgy, and namely to nickel-based alloys of protective coatings of parts of a gas turbine. Nickel-based alloy for the protective coating of gas turbine parts contains the following, wt %: cobalt 24-26, chrome 16-25, aluminium 9-12, yttrium 0.1-0.7 and/or at least one metal of the group containing scandium and rare-earth elements, non-obligatorily, phosphorus 0.1-0.7, non-obligatorily, silicon 0.1-0.6; it does not contain rhenium; nickel is the rest. |
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Invention relates to foundry and can be used for production of high-strength iron with globular graphite without structurally free cementite as-cast. Proposed alloy contains the following substances, in wt. %: rare earth metals - 10-20, silicon - 20-30, scandium - 1-3, aluminium making the rest. Foundry alloy comprises 1-3 wt. % of lanthanum in rare earth metal compound. |
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Invention relates to foundry and can be used for production of high-strength iron with globular graphite without structurally free cementite as-cast based on metalised pellets and steel wastes. Proposed agent contains components in the following ratio in wt. %: cerium - 7-10, lanthanum - 3.5-5.0, yttrium - 15-20, aluminium making the rest. |
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Electronic waste processing method Electronic waste is crushed on a hammer crusher; crushed copper is added, and then, it is fused in presence of flux during 45-60 minutes at the temperature of 1320-1350°C with air blowdown at its flow rate of 3-4.5 l/h and the obtained slag containing at least 2.6 wt % of precious metals is separated from slag. |
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Tungsten carbide-based hard alloy for cutting of hard-to-machine materials Invention relates to powder metallurgy, particularly, to tungsten carbide-based alloys with rhenium-alloyed binder. It can be used for cutting of hard-to-machine materials based on refractory metals, steels and alloys used for production of parts operated at high temperatures, for example, boilers, gas turbines, jet engines, nuclear reactors. Tungsten carbide-based alloy contains tungsten carbide and binder containing 52-55 wt. % of rhenium, cobalt making the rest. |
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Alloy on basis of ni3al intermetallic compound and item made from it Invention relates to casting alloys based on Ni3Al intermetallic compound and items obtained by a method of accurate casting as per molten models with a dendrite column structure, such as for example nozzle blades, assemblies of nozzle blades and other parts of gas-turbine engines of aircraft and automobile industries. Alloy based on Ni3Al intermetallic compound has the following chemical composition, wt %: Al 8.4-9.0, Cr 4.5-5.5, W 3.0-3.8, Mo 3.0-3.8, Ti 0.3-0.8, Co 6.5-7.5, C 0.02-0.08, La 0.0015-0.015, Hf 0.3-0.8, and Ni is the rest. Alloy based on Ni3Al intermetallic compound is characterised by increased heat resistance at temperatures of 1000 and 1050°C on bases of tests of 100, 500 and 1000 hours. |
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Method of processing magnesite dolomite raw material Invention relates to the mining and processing industry and can be used in utilisation of wastes of magnesite ore mining and benefication. A method of a magnesite dolomite raw material processing includes raw material crushing, classification and further leaching of magnesium by an acid. Particles with coarseness of 0.2-4.0 mm are separated from the magnesite dolomite raw material. Leaching is carried out at a temperature of 15-20°C by 10-50% water solution of nitric acid with stoichiometric composition: dolomite from 1.1:1 to 1.3:1 with dolomite dissolution. A magnesite sediment is separated from the obtained solution, containing magnesium and calcium ions, by filtration, sulfuric acid is added into a solution with precipitation of calcium in the form of gypsum and obtaining nitric acid as a result of reaction Ca(NO3)2+H2SO4+2H2O→CaSO4·2H2O↓+2HNO3. Gypsum is separated by filtration, the solution is blown with carbon dioxide, the sediment of magnesium hydrocarbonates is obtained and separated by filtration. The obtained solution of nitric acid is conditioned to the required concentration and supplied to leaching. |
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Complex processing of martite-hydrohematite ore Proposed process comprises ore screening, magnetic separation to obtain magnetic and nonmagnetic fractions, grinding, hydraulic classification, thickening and drying. Martite ore is first subjected to screening with separation to three size classes, i.e. coarse, intermediate and fine. Coarse class is directed to sensory separation to obtain tails and concentrate to be additionally ground and screened to intermediate and fine classes. Intermediate class is conveyed to metallurgical processing while fine class is subjected to pelletising. Hydrohematite ore is first subjected to screening with separation to three size classes, i.e. coarse, intermediate and fine. Coarse class is directed to sensory separation to obtain tails and concentrate to be additionally ground and screened to intermediate and fine classes. Intermediate class is conveyed to metallurgical processing. Portion of fine class is directed for pelletising while another portion is directed to magnetic separation, its magnetic fraction is fed for pelletising. Nonmagnetic fraction is ground with mixing by grinding medium and directed to hydraulic classification of the first stage. Classification sands are returned to the mill. Sink is fed to second stage of classification, its sink being used as 3rd grade pigment after thickening and drying. Sands of second classification are fed to second stage of grinding with mixing by grinding medium. Product ground at second stage is subjected to 3rd stage hydraulic classification, its sands being dried and used as 2nd grade pigment. Thereafter, sink is thickened, dried and used as 1st grade pigment. |
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Production of intermediate blank from iridium Unalloyed iridium ingot is subjected to hot forging, electron-beam melting iridium with content of the main component making at least 99.95 wt % being used to this end. Forging is carried out for about 0.5 h. Note here that temperature is decreased from 2000°C to 1300°C. Then, forged piece is annealed in vacuum of 10-4÷10-5 mm Hg. Forged piece is heated at the rate of 150°C/h the room temperature to 1100÷1200°C and held thereat for at least 1 h. |
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Proposed alloy contains the following components in wt %: chromium - 9-16, cobalt 10-16, tungsten 4-9, molybdenum - 0.2-3.0, aluminium - 1.8-4.5, titanium 2.0-4.5, tantalum - 2.5-7.0, niobium 0.01-1.5, boron 0.01-0.5, lanthanum 0.01-0.5, yttrium 0.01-0.2, cerium 0.01-0.2, rhenium - 0.5-5.0, hafnium 0.1-1.0, manganese 0.05-1.0, silicon - 0.05-1.0, magnesium 0.01-0.2, nickel making the rest. |
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Production of disc-shape forged pieces from alloy of aluminium with ortho-phase titanium Ingot is subjected to swaging-drawing to octahedron with total reduction of 1.6-1.7. Final forming is performed at shaped hammers at 4-5 displacements over hammer surface and, then, in closed sizing die. Total reduction ay final forming makes 3-5. |
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Extraction of heavy metals, iron, gold and silver from sulphate cake Invention relates to hydrometallurgy and can be used for processing of concentrates, industrial products and solid wastes containing metals. Proposed process comprises leaching of cake 3 n, by HCl solution at 70°C and L:S ratio of 2. Note here that leaching is performed in the presence of table salt of concentration making at least 120-140 g/dm3. |
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Proposed composition contains the following substances, in wt %: carbon - 2.6-2.8; silicon - 0.8-1.2; manganese - 0.8-1.2; chromium - 0.2-0.4; barium - 0.001-0.002; molybdenum - 0.4-0.6; nickel - 1.2-1.6; calcium - 0.0001-0.0003; niobium - 0.4-0.6; aluminium - 0.04-0.06, iron making the rest. |
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Method of processing phosphogypsum for production of concentrate of rare earth metals and gypsum Method includes preparation of phosphogypsum pulp, leaching rare earth metals (REM) and phosphorus with sulphuric acid. After that, pulp is separated into REM and a phosphorus-containing solution and gypsum in the form of insoluble sediment, its neutralisation and REM sorption with cationite from the solution with obtaining mother liquor. After that, REM desorption is performed with obtaining a strippant and separation of REM concentrate from the strippant. Stage leaching is performed in the method, with supply of phosphogypsum to each stage and sulphuric acid to the first stage. Before neutralisation gypsum is subjected to water washing with obtaining a washing solution, supplied to REM sorption with cationite. Sorption mother liquor is divided into two parts, one of which is used to prepare phosphogypsum pulp, with precipitation of phosphorus and fluorine with basic calcium compound from the second one. The obtained sediment is separated from water phase and supplied to utilisation, and water phase is used in circulation. |
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Invention relates to metallurgy, particularly to production of hot-stamped part that feature high corrosion resistance. Two plies are successively applied on steel substrate surface: plating ply I containing 60 wt % and more of Ni, Zn and unavoidable impurities making the rest. Note here that coating mass varies from 0.01 to 5 g/m2; and plating ply II, containing 10 to 25 wt % of Ni, Zn and unavoidable impurities making the rest. Note coating mass varies from 10 to 90 g/m2. |
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Processing of sulphide copper-lead-zinc materials Proposed method comprises locating of concentrate into converter and its oxidative smelting. First, matte is poured into converter to blow it with coal-air mix at coal consumption of 500 kg per ton of matte at coal-to-air ratio of 0.35 kg/m3. Concentrate is loaded on fused matte surface to blow it with air enriched with oxygen to 25 vol. % to complete smelting of concentrate. Quartz and lime flux are loaded to proceed with blowing to produce the slag and matter rich in copper, both are, now, discharged by 70% to resume melt blowing with coal-air mix. |
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Gamma titanium aluminide-based alloy Proposed alloy features density at a room temperature of not over 4.2 g/cm3, solidus temperature of at least 1450°C, the number of phases α2 and γ at 600-800°C making at least 20 wt % and at least 69 wt %, respectively. Total quantity of said phase makes at least 95 wt % while niobium content in γ-phase makes at least 3 wt %. Proposed method consists in that said γ-TiAl alloy containing niobium in amount of 1.3 or 1.5 at. % and transition metals selected from chromium in amount of 1.3 or 1.7 at. % and zirconium in amount of 1.0 at. % is subjected to hot isostatic forming. Said forming is combined with annealing at 800°C and holding for 100 hours. |
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High-strength armour steel and production of sheets thereof Proposed steel contains components in the following ratio in wt %: carbon - 0.28-0.40, silicon - 0.80-1.40, manganese - 0.50-0.80, chromium - 0.10-0.70, nickel - 1.50-2.20, molybdenum - 0.30-0.80, aluminium - 0.005-0.05, copper - not over 0.30, sulphur - not over 0.012, phosphorus - not over 0.015, iron making the rest. Molybdenum-to-carbon ratio makes 0.8-2.0. Steel blanks are heated to hot deformation temperature to carry out rolling at specified reduction and to quench with tempering. Quenching is performed at press with cooling in water at the pressure of 150-500 kg/cm2 and water flow rate of 0.2-0.5 m3/h. |
Another patent 2513908.
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