Explanation

thermite is a pink mixture of aluminium powder and ferric oxide powder in a certain proportion. When ignited with a pilot agent, the reaction proceeds violently with less gas products and small flame. The reaction product aluminum oxide and simple iron are obtained, and a large amount of heat is released. The combustion temperature can reach 3000 ° C. The hot slag generated by the reaction has a strong melting capacity for metals. Replace iron oxide with certain metal oxides. It can also be used as thermite. When aluminium powder reacts with these metal oxides, it generates enough heat to make the reduced metal melt at a higher temperature and separate from the formed slag, so as to obtain more pure metal. This method is commonly used in industry to smelting refractory metals, such as vanadium, chromium, manganese, etc. In addition to welding rails and smelting refractory metals, thermite has also been widely used in military affairs. For example, thermite can greatly improve the scorching lethality by filling one end of the gun warhead with thermite.

Classification