Sodium metabisulfite is mainly used as a mineral processing agent in mining. It is a strong reducing agent that decomposes copper xanthate and copper sulfide-like components on the surface of minerals through sulfite ions, oxidizes the surface of minerals, promotes the formation of zinc hydroxide, and inhibits the activated sphalerite. In the beneficiation of hydrocobaltite, sodium metabisulfite and other reducing agents are used together to dissolve copper oxide and cobalt oxide to obtain a mixed solution with copper sulfate. Compared with other reducing agents, sodium metabisulfite has stronger reducing properties, so the amount of reducing agent used can be reduced, reducing costs. In addition, sodium metabisulfite can also be used to inhibit minerals such as pyrite and sphalerite, improving beneficiation efficiency and concentrate quality. When using sodium metabisulfite, it is necessary to pay attention to controlling the dosage and reaction conditions to ensure beneficiation effect and environmental safety.
In gold ore dressing, sodium metabisulfite has the following main functions:
- Inhibition of pyrite and arsenopyrite: Sodium metabisulfite can decompose copper xanthate and copper sulfide-like components on the surface of minerals, oxidize the surface of minerals, and thus inhibit the flotation of sulfides such as pyrite and arsenopyrite.
- Improve the recovery rate of gold: Sodium metabisulfite can dissolve copper oxide and cobalt oxide to obtain a mixed solution of copper sulfate and cobalt sulfate, thereby improving the recovery rate of gold.
- Reduce mineral processing costs: Sodium metabisulfite has a strong reducing property, which can reduce the use of other reducing agents, thereby reducing mineral processing costs.
How much sodium metabisulfite is used in gold mining?
The amount of sodium metabisulfite used in gold mines will be affected by many factors, such as the nature of the gold mine, processing technology, equipment conditions, etc. Therefore, the specific amount needs to be adjusted and optimized according to the actual situation.
According to some research and practical experience, the dosage of sodium metabisulfite in gold mines is usually between a few grams and tens of grams per ton of ore. For example, in a detoxification test of a gold mine cyanide leaching tailings slurry, the dosage of sodium metabisulfite was 4.0g/L; in a process for improving the leaching rate of carbon-containing and tellurium-containing refractory limestone gold ore, the dosage of sodium metabisulfite was 3kg/t.
Post time: Dec-03-2024
