Application of precipitated barium sulfate (granular) in coatings Barium sulfate is used as a pigment and filler in building waterproof coatings in two forms: barite powder prepared by processing the natural mineral barite and precipitated barium sulfate prepared by chemical methods. Due to some special performance requirements, precipitated barium sulfate paint is generally used for building waterproof coatings.
There are two main types of barium sulfate used in industry. One is barite powder, which is natural barium sulfate made by directly grinding barite. It contains a small amount of calcium carbonate and barium carbonate impurities and is mainly used in coatings and pigments. field. Barium sulfate radiation-resistant mortar has good shielding performance, construction performance and mechanical properties, and has good alkali resistance and waterproofness. The other type is precipitated barium sulfate used to prepare high-gloss PP. Precipitated barium sulfate is prepared using chemical methods. The purity of barium sulfate is extremely high, generally reaching more than 98%. There are two main methods for preparing barium sulfate by sedimentation method. One is to calcine and reduce barite and pulverized coal, and then add sodium sulfate solution for reaction. The other is to react natural barium carbonate with sulfuric acid. These processing methods are relatively common in our country.
Radiation-resistant barium sulfate is an excellent high-energy ray protection material used in radiation protection projects. It has the advantages of low cost, convenient construction, and long service life. Radiation-resistant barium sulfate has the property of absorbing X-rays. Severe radiation-resistant barium sulfate is used to make barium sulfate mortar, which has an isolation effect on X-rays. The barium sulfate BaSO4 content of barium sulfate BaSO4 in the preparation of radiation-resistant barium sulfate concrete and concrete is not less than 86%. Barium sulfate is used to make barium cement, barium sulfate mortar and barite concrete, which are used to replace metal lead plates and nuclear reactors, and are used in scientific research and hospital construction to prevent X-rays.
Barium sulfate is widely used in daily life, industry and medical fields. It is often used as filler or raw material in paints, inks, plastics, advertising paints, cosmetics, batteries, and rubber products.
It has a reinforcing effect and is used as a filler and weighting agent in PVC. It is used for surface coating of impression paper and coated paper. It is used in the textile industry and for sizing. Transparent barium sulfate glass. This product is used as a clarifying agent to defoam and enhance gloss. Barium sulfate can be used as a radiation protection wall material. Barium sulfate is also used in the ceramics, enamel, perfume and pigment industries.
Barium sulfate is also a raw material used to make other barium salts. It can be used in powder coatings, paints, ship primers, ordnance equipment paints, automotive paints, latex paints, interior and exterior wall building coatings, etc. to improve the light resistance of products. Weather resistance, chemical and electrochemical corrosion resistance, improve the decorative effect of the product, and improve the impact resistance of the coating. Barium sulfate is used in the inorganic industry to produce other barium salts, such as barium hydroxide, barium carbonate, barium chloride and other raw material wood products for processing wood grain printing boards. Barium sulfate is used as primer and paint preparation. Barium sulfate is used as a raw material for organic synthesis and is used as a raw material for green pigments and lakes.
Barium sulfate is divided into two types, one is made by grinding recrystallized stone, and the other is chemically synthesized precipitated barium sulfate. Because the production equipment for precipitated barium sulfate is complicated, during the pickling and water washing processes. Medium and high pollution resources and wastewater discharge seriously affect the environment. The state’s production policy for precipitated barium sulfate has been tightened year by year. Especially during this year’s “Environmental Impact Assessment Storm”, a batch was eliminated.