Some common knowledge about industrial salt


Although the main component of industrial salt is sodium chloride, it may contain impurities and heavy metals to varying degrees due to its lack of purification.
Salt is a necessity for maintaining human life. Its main component is sodium chloride, which contains iodine and other elements needed by the human body. The daily salt intake of each adult should not exceed 6 grams. Although the main component of industrial salt is sodium chloride, it may also contain some impurities and heavy metals exceeding the standard to varying degrees. These impurities can cause harm to the human body, especially to pregnant women and children. Meanwhile, if industrial salt does not contain iodine, long-term consumption can lead to iodine deficiency.
Industrial salt is used as a chlorinated roasting agent and quenching agent in the metallurgical industry, as well as a desulfurizer and clarifying agent for processing metal ores. Soaking steel and rolled steel in salt solution can harden the surface and remove oxide film. Salt chemical products are used for pickling stainless steel strips, baking aids for aluminum smelting, electrolytic solutions for sodium metals, and refractory materials in smelting.
In the casting process, industrial salt can be used as an excellent binder for medium sand in non-ferrous metal and alloy casting. At high temperatures, salt can soften the casting core, thereby preventing hot cracking of the casting. Compared to organic adhesives, salt produces the least harmful gases at high temperatures.
The commonly used heating equipment for heat treatment of steel mechanical parts or tools is a salt bath furnace. Compared with box furnaces, salt bath furnaces have advantages such as easy temperature control, uniform heating, fast heating speed, local heating, less bending of slender workpieces, and avoidance of oxidation and decarbonization. At the same time, it can be used as a commonly used catalyst in carburizing chemical heat treatment. During the heat treatment process, quenching with salt water can also achieve ideal results.
Industrial salt is mainly used in the production of alkali, soap, LV gas, and sodium hydroxide. It is also widely used in metallurgy, leather making, pharmaceuticals, agriculture, animal husbandry, and fisheries. In addition, industrial salt is widely used in industrial sectors such as food, feed, leather, ceramics, glass, soap, dyes, fats, mining, pharmaceuticals, as well as water treatment, ice making and refrigeration, road snow removal, etc.

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