Nature:
Light gray metal, brittle. Relative density 7.20. Melting point (1244 3) ℃. Boiling point 1962℃. Soluble in dilute acid. Manganese reacts with water in water and can interact with halogens, sulfur, phosphorus, carbon, and silicon. Manganese vapor forms oxides with oxygen in the air during smelting. There are cubes and fours
Two forms of angular shape, and with a complex crystal structure electrolytic metal manganese generally contains manganese 99.7% or more, pure electrolytic manganese can not be processed, and 1% nickel is added to become a malleable alloy.
Product use:
In the iron and steel industry is mainly used for steel desulfurization and deoxidation; It is also used as an alloy additive to improve the strength, hardness, elastic limit, wear resistance and corrosion resistance of steel; In high alloy steel, it is also used as an austenitic combining element for refining stainless steel, special alloy steel, stainless steel electrode, etc. In addition, it is also used in non-ferrous metals, chemical industry, medicine, food, analysis and scientific research.
Safety nature:
In wooden drums lined with polyethylene plastic bags or packed in iron drums, the net weight of each barrel is 50kg. Flammable solids. Hazard Code Number: GB 4.1 Class 41506. Store in a cool, dry and well-ventilated warehouse. Avoid moisture. Should be isolated from acids, strong alkalis, etc. Keep away from fire to prevent explosion. Protect against rain and sun exposure when transporting. Handle with care during loading and unloading to prevent damage to the packing. Dust flying places, should wear dust cover, warehouse should have exhaust device. In case of fire, sand and dry powder fire extinguishers can be used to put out. Toxicity and protection: Manganese can cause serious lesions of the central nervous system, including Parkinson's disease. It can cause serious damage to the pallidum of striatum of brain and degeneration of liver, kidney and myocardium. Chronic poisoning is divided into three stages: it begins with damage to the central nervous system, sometimes with stomach changes and multiple neuritis; Then there was initial toxic encephalopathy and later Parkinson's syndrome, characterized by; Facial rigidity, weakness, apathy, speech disorder, etc. Damage to the skin, can cause dermatitis, chronic eczema, so that the skin scratch is not easy to heal, lymph glands are also generally swollen. Maximum allowable concentration: manganese condensation aerosol (by Mn) 0.03mg /ma; Pulverized aerosol (Mn).2mg /m3. When there is dust in the production, dust masks are used, and when the concentration is large, work gas masks with filters are used. The production process should prevent the discharge of dust and smoke, and clean the workplace with wet method for the leaked manganese dust. Staff undergo regular medical examinations.