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Burning of laboratory solid matter
The operation of heating a solid substance to a high temperature to achieve dehydration, decomposition or removal of volatile impurities, burning of organic matter, and the like is called burning. The method of burning is to place the solid in a crucible, heat it directly with a gas lamp, or place it in a high temperature electric furnace and heat it at the required temperature. For example, the reaction of decomposing ore (calcined limestone is calcium oxide and carbon dioxide), kaolin roasting and dehydration to make its structure loose and porous, further processing to produce alumina, roasting titanium dioxide to change its crystal form and properties, etc., are examples of high temperature burning solids. . The electric heaters commonly used in the laboratory include electric furnaces, electric heating jackets, tubular furnaces and horse-melting furnaces. The heating temperature can be controlled by adjusting the external resistance. The temperature of the tube furnace and the Mafu furnace can reach about 1000 degrees, and a thermocouple is inserted into the furnace hole to indicate the temperature in the furnace and is controlled.
The thermal bath is heated indirectly. When the heated object needs to be heated uniformly, and the heated temperature cannot exceed a certain limit, a specific thermal bath indirect heating method may be selected according to the specific situation.