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Prevention of pollution sources is a cost-effective measure to intercept incoming water from stope and waste rock to reduce the amount of acid water produced; to seal the surface of the ore, to isolate contact with air and moisture; to properly ore dressing to reduce acidic water The production.
Despite some comprehensive treatment methods, the production of acidic water is still inevitable. The treatment of simple acidic water in the Yunfu pyrite mine is to use a reverse-cone type swirling pool limestone powder to neutralize the acidic water process. The water quality can be raised from 3.0 to 6.5, and then clarified by a multi-stage advection sedimentation tank. The water quality can fully meet the national industrial wastewater discharge standard.
For complex acidic water (acidic water with particularly high content of manganese , zinc and iron), a two-stage neutralization process is adopted, that is, the first stage is neutralized with limestone powder in an inverted cone swirling tank, and the pH is raised from 3.0 to 4.5, the first The second-stage fertilization lime is neutralized by a drum or a stirred tank, and is discharged after being clarified by the advection sedimentation type. In 1992, Yunfu built a large-scale acid water treatment station.
The acid water of the general mine is treated with lime milk neutralization and discharge. At present, most of the pyrite ore beneficiation adopts alkaline process flotation, which can avoid acid corrosion of equipment, and the ore dressing wastewater is alkaline water and underground acidity. Discharged in the water after the standard. Some beneficiation processes require the addition of sulfuric acid. The use of underground acidic water can save some of the sulfuric acid, reduce the cost of ore dressing, and make rational use of some acidic water. It is also a more reasonable method, but the process index of ore dressing should be guaranteed.
Pyrite quickly to produce acidic water with water, such as iron ore mine sulfur yunfu perennial observation, waste rock and pH of the large reservoir units on average is about 3.5. Yunfu Pyrite Mine has adopted measures to strictly control acidic water, actively control acidic water, strengthen management in the whole process of production, and strengthen comprehensive management.