What is sintering?

Sintering is a traditional process, which transforms powdery materials into dense bodies. People have long used this process to produce ceramics, powder metallurgy, refractories, ultra-high temperature materials and so on. Generally speaking, after powder molding, the compact obtained by sintering is polycrystalline material, and its microstructure is composed of crystals, glass bodies and pores.

The sintering process directly affects the grain size, pore size, grain boundary shape and distribution in the microstructure. The properties of inorganic materials are not only related to the composition of the materials (chemical composition and mineral composition), but also closely related to the microstructure of the materials. Through sintering, the metallurgical properties of raw materials can also be improved. Sintering is also used in nonferrous metal smelting process. Sintering of non-ferrous metal sulfide concentrate has desulfurization function besides briquetting.

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Importance of sintering

The temperature in the sintering process is called sintering temperature, and the temperature range between sintering temperature and starting overburning temperature is called sintering temperature range. If the sintering temperature and sintering temperature range continue to increase during the sintering process, the green body will begin to deform, soften and burn, resulting in sintering accidents.

Hazard sources: high temperature, dust, high-speed mechanical rotation, toxic and harmful gases and logistics injuries, aerial work and other hazards;

Accident types: mechanical injury, falling from a height, object strike, lifting injury, burn, electric shock, poisoning, pneumoconiosis;

Cause of the accident: equipment defect, technical process defect, protective device defect, bad working environment, imperfect rules and regulations, and illegal operation.

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