23 results about "Thermite" patented technology

The invention provides a method for preparing a high-purity niobium ingot by utilizing multistage refining and the high-purity niobium ingot, and the method comprises the following steps: (1) taking aluminum particles, niobium pentoxide, a heat generating agent and a slag former as raw materials, preparing an aluminum-niobium alloy ingot by adopting an exothermic method outside a furnace, and then carrying out surface treatment and crushing treatment to obtain aluminum-niobium alloy particles; (2) the aluminum-niobium alloy particles are subjected to horizontal electron beam smelting, and a smelted niobium plate is obtained; (3) stacking a plurality of smelting niobium plates, and then sequentially performing vacuum diffusion welding and vacuum arc smelting to obtain a primary niobium ingot; and (4) the primary niobium ingot is placed in a double-gun electron beam smelting furnace to be smelted, and the high-purity niobium ingot is obtained. The stable production of the high-RRR value high-purity niobium is realized by adopting a multi-stage refining process coupling system of an aluminothermy method, horizontal electron beam melting, diffusion welding, electric arc melting and double-gun electron beam melting, and the technical problems of high energy consumption, high cost, low production efficiency and the like in the traditional process are effectively solved.

A method and cascade reactor system for producing elemental rare earth metals and rare earth-aluminum alloys via aluminothermic reduction are disclosed. The method involves combining rare earth oxides or halide salts with aluminum powder, initiating a thermite-type reaction under inert or controlled atmospheric conditions, and recovering the molten metal product. Fluxing agents may be used to enhance slag fluidity and phase separation. The cascade reactor comprises multiple thermite zones with staged ignition, thermal transfer mechanisms, and slag separation interfaces, enabling sequential reduction of mixed feedstocks. The system supports both batch and continuous formats and achieves high recovery yields, reduced aluminum contamination, and compatibility with alloying and post-purification processes. The invention is adaptable to individual rare earth species and mixed oxide concentrates, offering a scalable, energy-efficient, and environmentally favorable route to rare earth metal and alloy production.

This invention discloses a fluoride-modified liquid metal thermite and its preparation method, belonging to the field of thermite preparation technology. It utilizes Galinstan eutectic to prepare liquid metal; aluminum powder and liquid metal are synthesized using physical mixing and ultrasonic treatment to obtain liquid metal-modified aluminum; FeCl3·6H2O is added to a perfluorooctanoic acid aqueous solution and stirred, followed by a hydrothermal reaction; the resulting product is washed to obtain Fe(PFO)3; the liquid metal-modified aluminum is mixed with iron perfluorooctanoate and ultrasonically treated to obtain Fe(PFO)3@LM-Al; Fe(PFO)3@LM-Al and iron oxide are added to anhydrous ethanol and ultrasonically stirred to obtain Fe(PFO)3@LM-Al@Fe2O3. This invention, using the above method, raises the high-temperature thermal oxidation reaction temperature of aluminum powder to before the melting point of 660℃, achieving a breakthrough in the thermal mass transfer process of aluminum powder.

The present disclosure teaches a system and method for generating power by a thermal power plant. The system and method includes a fuel heating chamber configured to receive a nano-thermite fuel, an induction assembly configured to inductively heat the fuel in the fuel heating chamber, and an electricity generating subsystem configured to convert heat from the heated nano-thermite fuel into electricity.

This invention provides a method for producing a chromium-aluminum-iron alloy, including steps such as raw material mixing. The raw materials used in the mixing process are chromium oxide, aluminum powder, lime, and sodium chlorate. The process employs a two-step smelting method: first, an aluminothermic reduction reaction is used, and second, an electric heating method is employed in a refining furnace. This process homogenizes the molten iron, chromium, and aluminum alloys with different specific gravities, preventing heavier iron and chromium from sinking and lighter aluminum from floating, thus avoiding alloy segregation. The chromium oxide yield produced by this method reaches 93.97%, which is 5-6 percentage points higher than the yield of metallic chromium produced by the conventional aluminothermic method. The metallic aluminum yield reaches 98%-99%, with low aluminum burn-off.

The invention is a multi-layer thermite block, encased in an exterior protective shield with one face exposed. The exposed face is carved out to accommodate a target device such that the block encompasses the target device when placed atop the device. When receiving a data-destruction signal, the block is ignited producing a short-duration blast of heat sufficient to severely damage or destroy all physical data-storing facilities of the target device.

The invention provides a preparation method of a low-cost CuCr25 contact material, and relates to the technical field of preparation of electrical materials, and the preparation method comprises the following steps: preparing and weighing CuCr25 contact raw materials, mixing the CuCr25 contact raw materials, carrying out compression molding on the CuCr25 contact raw materials, sintering a green body, processing and preparing a CuCr25 contact, and cleaning and inspecting the CuCr25 contact. The water atomized copper powder and the aluminothermy chromium powder are adopted as main raw materials, quantitative recycled powder is innovatively added, the cost of the raw materials is successfully and greatly reduced, the optimized solid-phase sintering process ensures that the material forms a uniform and compact microscopic structure, meanwhile, the production energy consumption of the material is effectively reduced, and the production cost is reduced. The key performance of the prepared CuCr25 contact material completely meets the application standard of low-voltage electrical appliances, the conductivity and strength are perfectly balanced, the product advantages of low cost and high performance are constructed, the green manufacturing concept is reflected through waste recycling, and collaborative improvement of economic benefits and product performance is effectively achieved.

A method and associated system of energy production, the method including providing core-shell thermite particles and combusting the core-shell thermite particles in a dispersed group to produce heat. The combustion of the core-shell thermite particles may proceed according to various core-shell thermite group combustion modes.

A thermite composition for a process of plugging and abandoning a petroleum well comprises a tube-scaling composition and a gas leakage-preventing composition. The tube-scaling composition comprises aluminium and a metal oxide, and the gas leakage-preventing composition comprises a metal or an alloy with a melting point ranging from 100-300° C. The tube-scaling composition is arranged at the bottom, followed by the gas leakage-preventing composition. The thermite composition further comprises a tube-opening composition comprising aluminium and a metal oxide. The process of plugging and abandoning a petroleum well using the thermite composition involves introducing the thermite composition which is arranged in layers in the petroleum well to be plugged and abandoned, and initiating an ignition to trigger a thermite reaction, which melts the metal for tube sealing and prevents gas leakage.

A method and associated system of energy production, the method including providing core-shell thermite particles and combusting the core-shell thermite particles in a dispersed group to produce heat. The combustion of the core-shell thermite particles may proceed according to various core-shell thermite group combustion modes.

This invention relates to the field of metallic materials technology, specifically to a method for producing an aluminum-tungsten-tantalum ternary master alloy. The method involves mixing tantalum pentoxide, aluminum powder, and potassium chlorate, placing the mixture in a molten pool, igniting it with a magnesium strip, and cooling it to obtain an aluminum-tantalum alloy ingot. After removing the surface alumina from the ingot, the ingot is machined into chips in a glove box for later use. Tungsten trioxide, aluminum powder, and the chipped aluminum-tantalum alloy are then mixed and placed in a vacuum aluminothermic furnace. The furnace is closed, a vacuum is created, and a mixture of magnesium and potassium permanganate is sprayed in. The mixture is ignited to initiate a vacuum aluminothermic reaction. After the reaction occurs, the vacuum level in the furnace is increased, and the furnace is cooled. The furnace is then opened, and the slag is removed to obtain the aluminum-tungsten-tantalum alloy ingot. This invention combines metallothermic reduction with vacuum aluminothermic processes to prepare the aluminum-tungsten-tantalum ternary alloy, producing an aluminum-tungsten-tantalum alloy with high homogeneity and low gaseous impurities. This solves the problems of high melting point, high density, and high gaseous impurity content in traditional aluminothermic reaction production methods.

The invention discloses a production method of a vanadium-iron alloy. The production method comprises the following steps: S1, selecting high-impurity vanadium-aluminum alloy crushed aggregates and polishing wastes, vanadium pentoxide, iron oxide powder, aluminum particles, calcium oxide and a heat generating agent; s2, treating the raw materials treated in the step S1; s3, uniformly mixing the crushed vanadium-aluminum alloy, the polishing waste, vanadium pentoxide, iron oxide powder, aluminum particles, calcium oxide and a heat generating agent to form a mixture; s4, a reaction furnace is selected, and a high-alumina refractory material with the particle size of 1-5 mm is laid at the bottom of a reaction furnace body; s5, filling the mixture into a reaction furnace body, compacting, spreading an ignition agent on the material for ignition, and carrying out aluminothermic reaction; s6, discharging after cooling; according to the method, the crushed vanadium-aluminum alloy with high impurity content and the polished waste are converted into the vanadium-iron alloy through an aluminothermic method, and recycling of the waste is achieved.

This invention relates to the field of intermediate alloy preparation technology for aerospace-grade titanium alloys, and discloses a vanadium-aluminum intermediate alloy for aerospace-grade titanium alloys and its preparation method. The alloy preparation uses high-purity aluminum granules, vanadium pentoxide, calcium oxide, cryolite, and aluminum foil as raw materials. First, a primary alloy is prepared using a vacuum aluminothermic method based on an "aluminum foil-encased powder package" material. Then, the primary alloy undergoes finishing treatment to obtain alloy particles. These particles are then subjected to alkaline washing, filtration, and vacuum heat treatment, ultimately yielding an AlV65 alloy with higher purity, better compositional uniformity, and a purer microstructure. This method effectively addresses the challenges of high vapor phase impurity content, significant component segregation, and numerous microscopic inclusions in existing vanadium-aluminum alloys, and is of great significance for building a more resilient aerospace industry chain and promoting high-quality industrial development.

The application provides an aluminum-molybdenum-chromium intermediate alloy and a preparation method thereof, and the preparation method comprises the following steps: (1) fluidizing roasting molybdenum disulfide and chromium sulfide, and obtaining molybdenum trioxide and chromium oxide after cooling; (2) mixing aluminum powder, potassium chlorate and the molybdenum trioxide and the chromium oxide obtained in the step (1), and then performing vacuum aluminothermic reduction smelting, cooling and refining to obtain the aluminum-molybdenum-chromium intermediate alloy. The preparation method provided by the application utilizes the heat released by the fluidizing roasting of the metal sulfide to dry the aluminum powder and the potassium chlorate, so that the drying process is shortened and the continuous production is facilitated; the vacuum aluminothermic method and the electron beam furnace refining method are adopted to improve the uniformity of the intermediate alloy, reduce the impurity content in the intermediate alloy and facilitate the control of the main component and the impurity content in the TC6, TC17 and TC18 and other grades of titanium alloy.

The application provides a method for preparing high-purity niobium ingot by using multi-stage refining and high-purity niobium ingot, and the method comprises the following steps: (1) taking aluminum particles, niobium pentoxide, a heating agent and a slagging agent as raw materials, preparing aluminum-niobium alloy ingot by using an off-furnace aluminothermic method, then performing surface treatment and crushing treatment to obtain aluminum-niobium alloy particles; (2) performing horizontal electron beam melting on the aluminum-niobium alloy particles to obtain molten niobium plates; (3) stacking a plurality of molten niobium plates, then sequentially performing vacuum diffusion welding and vacuum arc melting to obtain a primary niobium ingot; and (4) placing the primary niobium ingot in a double-gun electron beam melting furnace for melting treatment to obtain the high-purity niobium ingot. The multi-stage refining process coupling system of "aluminothermic method→horizontal electron beam melting→diffusion welding→arc melting→double-gun electron beam melting" is adopted to realize the stable production of high-purity niobium with high RRR value, and effectively solves the technical problems of high energy consumption, high cost and low production efficiency existing in the traditional process.

The invention provides a nano composite thermite with double oxidants and a preparation method thereof, the nano composite thermite comprises nano aluminum powder, metal fluoride and organic oxide, the equivalence ratio of the nano aluminum powder to the metal fluoride is 1-1.2, and the mass of the organic oxide accounts for 15-20% of the total mass of the aluminum powder and the metal fluoride. According to the invention, the electrostatic spraying process parameters of the nano-composite thermite using the metal fluoride and the organic oxide as double oxidants are determined, and the nano-composite thermite with a coating structure can be efficiently prepared.

The invention relates to the technical field of ferro-titanium alloy smelting, in particular to a ferro-titanium alloy smelting process based on a composite aluminum material aluminothermy method, which specifically comprises the following steps: modifying aluminum skimmings by using an auxiliary agent for pretreatment, and preparing the ferro-titanium alloy through gradient mixing and layered distribution, aluminothermy reaction initiation and smelting. The composite fluoride-MgO compound is melted at the initial stage of the reaction, and the composite fluoride and the nano MgO form a physical-chemical dual membrane rupture effect. CaO and BaB6 micro powder are wrapped by Li2B4O7, so that the effects of protecting and avoiding layering are achieved. Internal active components are gradually released, so that the effective action time of the additive is prolonged. Li < + > and BaB6 which are released by melting Li2B4O7 react with each other to gradually generate BF3, and F <-> is chemically corroded to form synergistic membrane rupture of internal and external clamping, so that the membrane rupture efficiency is improved. CaO reacts with Li2B4O7 to generate Ca3B2O6, so that the slag phase viscosity is reduced, and the slag-metal separation is improved. And meanwhile, CaO has the desulfurization capacity, melt purification can be achieved, and the recovery rate of titanium and the alloy purity are improved.

The utility model discloses an electric starting type thermite ignition device, a handheld electric gun comprises two handheld electric gun electrode columns, a power supply and an electric gun shell, one end of one handheld electric gun electrode column is electrically connected with a positive electrode of the power supply, and one end of the other handheld electric gun electrode column is electrically connected with a negative electrode of the power supply. The other ends of the two handheld electric gun electrode columns respectively extend out of the electric gun shell; the filling barrel comprises two filling barrel electrode columns, a filling barrel shell, a tungsten filament and a thermite, one end of one filling barrel electrode column is connected with one end of the tungsten filament, one end of the other filling barrel electrode column is connected with the other end of the tungsten filament, and the other ends of the two filling barrel electrode columns are attached to the other ends of the two handheld electric gun electrode columns respectively. According to the electric starting type thermite ignition device, rapid and stable ignition of thermite is achieved, and the problems that in a traditional ignition mode, ignition is unstable, operation is complex, environment friendliness is poor, and potential safety hazards exist are solved.

A downhole tool (100) comprises a heater (106) including a container (128) enclosing a volume of compacted thermite (126). A volume of flowable alloy (124) is provided above the heater (106). A fusible bulkhead (130) may be provided between the heater (106) and the alloy (124) and provides for direct conduction of heat from the heater (106) to the alloy (124). A housing (122) containing the alloy (124) may be separated from the heater (106) by heating a fusible socket that anchors an end of a tensioned support member (136). The thermite may define an internal volume (150) adapted to receive alloy (124). The heater (106) may be activated to melt the alloy (108) and the alloy may then solidify to form a bore-sealing plug.

The application discloses a kind of preparation methods of vacuum induction smelting CuCrNb alloy material, the component of the CuCrNb alloy includes 0.8%~3.4%Cr, 0.7%~3.0%Nb and the balance is Cu by mass percentage;The preparation method comprises the following steps: S1, take oxygen-free copper rod, intermediate alloy Cr and Nb;S2, oxygen-free copper rod is placed in crucible into smelting furnace, pouring mold is also placed into smelting furnace, intermediate alloy is placed into the second charging box of smelting furnace;S3, vacuum is extracted from smelting furnace in turn with mechanical pump and Roots pump;S4, first smelt oxygen-free copper rod in crucible, then add intermediate alloy into crucible;S5, alloy liquid refined in crucible is poured into mold;S6, mold is removed after cooling and then demoulding.The CuCrNb alloy material prepared by the application has extremely small component deviation and more uniform metallographic structure;Compared with the traditional aluminothermic method, the preparation success rate is greatly improved, and the preparation process is shortened and the production efficiency is improved.

The invention discloses an experimental device for an underwater combustion test of a thermite, the experimental device comprises an experimental tank body, a combustion system, a gas supply system, a water supply system and a data acquisition system, the combustion system comprises an experimental sleeve, the thermite is contained in the experimental sleeve, an electric ignition wire for igniting the thermite is arranged in the experimental sleeve, and the data acquisition system is connected with the experimental tank body. The electric ignition wire is connected with an external remote igniter through an ignition cable, the gas supply system comprises a pressure reducing valve arranged on the sealing cover, the pressure reducing valve is communicated with an external nitrogen cylinder through a gas pipe, and the water supply system comprises a water inlet ball valve arranged on the upper portion of the experiment tank body and a water outlet ball valve arranged on the lower portion of the experiment tank body. The data acquisition system comprises a thermocouple data acquisition unit and a computer which are electrically connected, a thermocouple is arranged on the outer wall of the experiment sleeve, and the thermocouple is connected with the thermocouple data acquisition unit through a signal line penetrating through the experiment tank body; the invention provides a reliable experimental platform for the research on the underwater combustion and high-temperature reaction mechanism of the thermite.

The present application relates to the technical field of drilling pipe external windowing, and provides a pipe external windowing jetting tool and method, the pipe external windowing jetting tool comprising: a main housing, a powder storage cavity is arranged in the main housing, and the main housing can be connected to a drill pipe; a thermite is arranged in the accommodating space; an igniter is arranged in the main housing and can ignite the thermite; a pressure balancing mechanism can balance the powder storage cavity and external pressure before the thermite is ignited; and a jetting assembly is communicated with the powder storage cavity and can jet reaction products of the thermite reaction to the outside of the main housing to melt through a target object. Through the above technical solution, a large amount of heat generated by the thermite reaction is used to heat the reaction products to a molten state, the jetting assembly jets the reaction products in the molten state to the target object, the target object is melted through, the windowing operation is quickly completed, and the pressure balancing mechanism can balance the internal and external pressures to avoid insufficient internal pressure, and the tool can be applied to cementing repair.

The application discloses a method for removing MXene functional groups and preparing defunctionalized MXene, wherein the method for removing MXene functional groups comprises the following steps: heating MXene containing functional groups and a thermite or a magnether to a predetermined temperature to ignite the reaction agent to generate an aluminum thermal reaction or a magnesium thermal reaction, stopping heating and cooling to normal temperature. The application aims at the technical problems that the existing method for removing the functional groups of MXene material is complex in operation, not universal, and difficult to effectively remove the surface functional groups such as -F and -Cl which have strong interaction with M atoms on the surface of MXene, and provides a method for quickly removing the surface functional groups of MXene material based on a self-propagating method.