What are the chemical purification methods for barite?

1. Flotation purification
With the continuous development and utilization of high-grade barite ore, it is urgent to increase the research and development of low-grade barite ore. Barite is often closely associated with minerals such as fluorite, calcite, quartz, etc. It is difficult to effectively separate by traditional gravity separation technology. Flotation can be adapted to various types of barite with complex inlays, so it has become the main method of barite selection at this stage.

2. Calcination purification
The process of mineral calcination is a physical change process that dissociates into a simpler mineral or the mineral itself undergoes a crystal form transformation, from a solid phase pyrolysis to another solid phase and a gas phase. Because the barite mineral is mixed with Fe2O3, TiO2, organic matter and other impurities during the bed formation process, these impurities will make the barite gray, green and blue, which will affect the purity and whiteness of the barite, and seriously reduce the weight. The use value of spar. Calcining can volatilize organic matter. Calcining impurity removal is mainly used to remove impurities that can endothermic decomposition or volatilization at high temperatures.

3. Extraction purification
The leaching purification is mainly used to remove the carbon and colored impurities in the barite. Their presence affects the whiteness and application prospects of barite concentrate. The main methods for removing these impurities are: acid leaching, oxidation-reduction, and organic acid complexation. The acid leaching method uses acid to react with impurity metals or metal oxides in minerals to generate compounds that are soluble in water or dilute acid. After washing and filtering, the solubles are removed, which can achieve the purpose of purification.