5 results about "Thermite" patented technology

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.

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.

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.

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 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.