Sodium metabisulfite is mainly used as a beneficiation agent in mining. It is a strong reducing agent that decomposes copper xanthate and copper-like sulfide components on the mineral surface through sulfite ions, oxidizes the mineral surface, promotes the formation of zinc hydroxide, and inhibits the activated sphalerite. . In the beneficiation of hydrocobalt ore, sodium metabisulfite is used together with other reducing agents 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 it can reduce the use of reducing agents and reduce costs. In addition, sodium metabisulfite can also be used to inhibit minerals such as pyrite and sphalerite to improve mineral processing efficiency and concentrate quality. When using sodium metabisulfite, attention needs to be paid to controlling the dosage and reaction conditions to ensure the mineral processing effect and environmental safety.
In gold ore beneficiation, sodium metabisulfite mainly has the following functions:
- Inhibiting pyrite and arsenopyrite: Sodium metabisulfite can decompose copper xanthate and copper-like sulfide components on the mineral surface, oxidizing the mineral surface, thereby inhibiting 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 increasing the recovery rate of gold.
- Reduce mineral processing costs: Sodium metabisulfite has strong reducing properties, which can reduce the use of other reducing agents, thereby reducing mineral processing costs.
How much sodium metabisulfite is used in gold mines?
The dosage of sodium metabisulfite in gold mines will be affected by many factors, such as the properties of gold mines, treatment processes, equipment conditions, etc. Therefore, the specific dosage 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 usually ranges from a few grams to dozens of grams per ton of ore. For example, in a detoxification test of cyanide leaching tailings slurry from a gold mine, the dosage of sodium metabisulfite was 4.0g/L; in a process to improve the leaching rate of carbon-containing tellurium-containing refractory limestone gold ore, the dosage of sodium metabisulfite was The dosage is 3kg/t.
However, these dosages are for reference only, and practical applications require experimentation and optimization to determine the optimal dosage of sodium metabisulfite. At the same time, when using sodium metabisulfite, you also need to pay attention to safe operations to avoid harm to the environment and human body.
Post time: Oct-15-2024
