Barium sulfate is divided into two production processes, physical method and chemical method.
The production process of the physical method can be briefly described as follows: heavy metal stones are directly ground into powder, and then ground into fineness according to the needs of customers. The advantages are low price, and the disadvantages are many impurities, low purity, and unstable whiteness.
The production process of chemical method is relatively complicated. The basic process is artificial stone selection, stone washing, pickling, water washing, crushing, etc. The barium sulfate produced by it has the advantages of high purity, good whiteness, and low impurities. Due to the complexity of the process, Its disadvantage is that the price is twice that of ordinary barium sulfate.
Barium sulfate has the advantages of strong chemical inertness, good stability, acid and alkali resistance, moderate hardness, high specific gravity, high whiteness, and the ability to absorb harmful rays. It is an environmentally friendly material, so it is widely used in various coatings, medium High-grade ink, pharmaceutical synthesis chemical industry, rubber, paper, ceramics, cosmetics and other fields.
Product grade BaSO4 content Whiteness
First-class product ≥98%95%
Second-class products ≥96%92%
Third-class products ≥93%90%
Fourth-class products ≥90%85%
1. Used in paints and paints—it can be used as a filler in paints and paints to replace high-priced raw materials such as lithopone, titanium dioxide, and active silica. It is suitable for controlling the viscosity of paints, making the products bright and stable.
2. Used in the plastic industry—it can be used as a filler for plastic ABS raw materials to make the product shiny and bright, and at the same time improve the product's strength, rigidity and wear resistance.
3. Used in the rubber industry, the products below 500 mesh can be used in large quantities in rubber products as fillers to reduce costs, improve product hardness, acid and alkali resistance and water resistance, etc., and have a good reinforcing effect on natural rubber and synthetic rubber.
4. Used in the paper industry—high-fineness barite powder can be used as filler and coating filler for white paper and coated paper to improve whiteness and surface coverage.
