First, the basic information:
sodium chloride (Sodium chloride), chemical formula NaCl, colorless cubic crystal or fine crystalline powder, taste salty. The appearance is white crystal, and its source is mainly sea water. Soluble in water, glycerin, slightly soluble in ethanol (alcohol), liquid ammonia; insoluble in concentrated hydrochloric acid. Impure sodium chloride is deliquescent in the air. The stability is better, the aqueous solution is neutral, and the industry generally uses electrolytic saturated sodium chloride solution to produce hydrogen, chlorine and caustic soda (sodium hydroxide) and other chemical products (generally called chlor-alkali industry) can also be used for ore. Smelting (electrolytic melting of sodium chloride crystals to produce active sodium metal), medically used to configure physiological saline, can be used for condiments in life.

Chinese name: Sodium chloride molecular weight: 58.44

Chemical formula: NaCl English name: Sodium chloride

CAS registration number: 7647-14-5 boiling point: 1465 ° C

Appearance: White crystal density: 2.165g/cm3

Melting point: 801 ° C HS code: 2501002000

2. Classification
A: Sun-based raw salt: divided into large-grain industrial salt, small white salt, (content 70%, 90%),

Large particles are mainly used for hot compressing, boiler water treatment

Small white salt is mostly used for breeding and water treatment.

Low sodium salt is often used as kimchi.

B: refined salt, refined industrial salt is mostly used in chemical production

a. Refined salt content of more than 99%, good fluidity, anti-caking agent added, good fluidity, can not agglomerate for a long time

Third, commonly used packaging
50KG white woven bag packaging (sunny raw salt has yellow packaging bag)

Fourth, uses
1, the application in the chemical industry

Salt is the mother of the chemical industry. The chemical industry is the basic industry of the national economy. Soda ash is produced with salt as the main raw material. It consumes 1.2 to 1.4 tons of raw salt per ton of soda ash produced.

2. Application in the dye industry

Raw materials commonly used in the dye industry, such as soda ash and chlorine, are directly produced from salt as a raw material, and in addition, a large amount of salt is directly consumed. Therefore, the dye industry is one of the industries closely related to the salt industry. Moreover, a certain amount of salt is consumed in almost every step of the dye production process.

3. Application in metallurgical industry

Salt is used as a chlorination roasting agent and quenching agent in the metallurgical industry, as well as a desulfurizing agent and clarifying agent for the treatment of metal ores. Stripping chemical products are required for pickling of strip steel and stainless steel, baking chemicals for aluminum smelting, electrolytic solution of sodium metal, etc., and salt chemical products, and refractory materials for smelting.

4. Application in building materials industry

Soda ash made from salt is the main raw material for the production of glass. In addition, in order to eliminate bubbles in the molten glass when melting the glass, a certain amount of clarifying agent must be added, and the salt is also a component of a commonly used clarifying agent, and the amount of the salt is about 1% of the glass melt.

General stoneware, ceramic tiles and cylinders require salt as a glaze. The salt consumption per cubic meter of pottery is 0.5 to 3 kg.

In order to improve the performance of the enamel enamel, some additives are added before the coating. The salt is an additive used for the surface glaze to increase the strength of the powder and improve the resistance to scoring and abrasion after the enamel is made. . The high salt usage is 0.3 kg per 100 kg of glaze.

In addition, the salt residue (salt gypsum) and the calcium magnesium mud (salt mud) produced in the brine purification can be used as building wall panels, wall materials or fillers, and can also be used as cement filler.

5. Application in the machinery industry

At the time of casting, the salt can be used as an excellent binder for casting medium-sized sand of non-ferrous metals and alloys. At high temperatures, the salt promotes the softening of the casting core, thereby preventing the occurrence of hot cracking of the casting. Salts produce less harmful gases at high temperatures than organic binders.

When the steel mechanical parts or tools are heat treated, the usual heating equipment is a salt bath furnace. Compared with the heating of the box furnace, the salt bath furnace has the advantages of easy temperature control, uniform heating, fast heating speed, local heating, slender workpiece not easy to bend, and avoiding many advantages such as oxidation and decarburization. At the same time, it is used as a common catalyst in the carburizing chemical heat treatment, and quenching with brine during the heat treatment process can also obtain a more desirable effect. When ferrous metals and copper and copper alloys are strongly pickled before plating, salt is required.