Dry preparation method of antimony white
Antimony white The preparation methods of antimony white are divided into dry and wet methods. Dry methods include the metallic antimony method and the stibnite method; wet methods include acid leaching and antimony salt hydrolysis.
Dry preparation methods of antimony white
1. Metallic antimony method (dry method).
Reaction equation: Sb+O2→Sb2O3
Antimony white Operation: 700 kg of 99.8% metallic antimony (containing 29 × 10-6 sulfur) is heated in a graphite furnace to 1200 ℃, and air is blown in at a speed of 0.3 m3/min for 5 minutes until the sulfur dioxide content in the waste gas is ≤5 × 10-6. After cooling to 786 ℃, air is blown in at a speed of 2 m3/min for 12 hours, and the antimony white yield is 92.1%.
2. Stibnite method (dry method).
Reaction equation:
2Sb2S3+9O2→2Sb2O3+6SO2↑
Sb2O3+3C→2Sb+3CO↑
4Sb+3O2→2Sb2O3
Antimony white Operation: Select high-grade stibnite, containing 50% ~ 60% antimony, 0.1% arsenic, 0.007% lead, 0.16% iron, 11.42% sulfur, 0.66% aluminum oxide, 4.75% calcium oxide, <0.5% magnesium oxide, 8.65% silicon dioxide, and 0.0026% mercury oxide. The concentrate is mixed with 10% iron ore (Fe 50.17%) and 2% limestone (CaO>50%) of the antimony concentrate, and added to the slag pool of the smoking furnace at a certain speed. A mixture of air and coal powder is blown in to adjust the slag temperature and the atmosphere in the furnace, keeping the temperature at around 1250 ℃. The added materials are continuously melted, and antimony white mainly exists in the form of Sb2O3 and a small amount of sulfide. Among them, antimony oxide is collected by the flue gas eddy current, and the dust collected by the electrostatic precipitator has high purity and can be used as Antimony white Used. After the dust collection exhaust gas absorbs sulfur dioxide, it is discharged. After adding the given materials, the sprayed coal continues to melt and smoke for about 1 hour. When there is basically no white volatile matter in the flue gas, the process ends, and 2/3 of the slag is discharged.
Next Page
Next Page
Contact Us
No. 2115, Building B2, Deshiqin City Plaza, No. 18, Xiangfu Middle Road, Yuhua District, Changsha City, Hunan Province.China
Follow Us
Copyright © 2025 Hunan Huaxing Non-ferrous Holdings Co., Ltd.
Website Construction:Zhongqi PowerChangsha