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The important role of barite in these three areas

2019-11-07
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Most of the barite deposits produced in Hunan, Guangxi, Qinghai, and Jiangxi in China are huge hydrothermal single mineral veins. Barite can also be produced in sedimentary rocks and appears as nodules, mostly in sedimentary manganese deposits and argillaceous and sandy sedimentary rocks in shallow seas. In the residual clay cover of weathered residual deposits, they often form nodules and blocks.

Guizhou barite has many uses, mainly used in the following three areas

1. For oil wells: Most barite is used as a circulating mud weighting agent in rotary drilling of oil and gas wells.

The mud is made by mixing agricultural, clay and barite in different proportions according to storage conditions, and the relative density is as high as 2.5. The mud is pumped into the hollow drill pipe with a pump, flows through the drill bit at the bottom of the drill hole, and then rises to the surface from the gap between the drill pipe and the drill wall. During the mud circulation process, the drill bit is cooled, the cut debris is taken away, the drill pipe is lubricated, the hole wall is closed, and the oil and gas pressure is controlled by the static pressure generated by the heavy mud column to prevent blowout.

The reason why barite is used for drilling mud is that it is clean, easy to process, soft (non-abrasive), relatively dense, chemically inert, and cheaper.

2. Chemical raw materials: Because barite ore has the characteristics of large relative density, good brightness, no chemical reaction and absorption of radiation, its barium compounds are used in many industrial sectors.

The main raw materials used in chemical industry are: (1) barium carbonate, which is the majority of barium compounds in quantity. Barium carbonate is used in many industries, including glass, chemical, ceramic, ferrite or titanium. And other industrial sectors. It is produced by two methods, and the raw materials used are barium sulfide (white powder foam). Barium carbonate is used to improve the quality of finished products, such as in the production of glass, enamel and magnets. In other industries, it is used to convert solution sulfate to non-solution barium sulfate.

(2) Barium sulfate barium sulfate powder is a barium sulfate precipitated or finely modified by chemical methods. It can also be made by different methods according to the purpose. Barium sulfate powder is mainly used as a filler and filler in the following industries: 70% for the coatings industry, 10% for the paper industry, 10% for plastics and battery production, and about 10% for the pharmaceutical field. In the coatings industry, sales of filler-grade barium sulfate powder have been affected by being replaced by titanium dioxide and other less expensive fillers. In the paper industry, calcium carbonate and talc are used as fillers, and the use of barium sulfate is limited to the manufacture of paper coatings and photo papers.

(3) Zinc barium white can be prepared by reacting barium sulfide and zinc sulfate to form a precipitate of barium sulfate and zinc sulfide. Zinc and barium was originally used as a pigment (paint) in the paper and coating production industry, but in recent years it has been largely replaced by titanium dioxide pigments. Now it is almost exclusively used in paints, and a small amount is used in artistic pigments.

 (4) Barium chloride can be prepared directly from barium sulfide by the reaction of hydrochloric acid or chlorine gas, or by the reaction of barium carbonate and hydrochloric acid. Two chlorides are used in industry: anhydrous barium chloride and crystalline barium chloride. The former is mainly used in the production of heat-treated salts to exclude sulfate impurities from various systems and to produce molecular sieves.

 (5) Barium hydroxide is made by the oxidation of a hot barium sulfide solution in air. It is used in the production of lubricating oil additives, the production of polyvinyl chloride stabilizers, and in the ceramic industry to replace barium carbonate to fix dissolved salts.

(6) Fillers and fillers. One of the more important applications of barite in non-drilling fields is as a filler and filler.

3. Ceramic industry: The ceramic industry is a traditional barium sulfate sales market, accounting for about 25% of its total sales. In architectural ceramics, barium carbonate is used in combination with the soluble sulfuric acid [gypsum] in the ceramic raw materials to prevent discoloration of the anvil and prevent weathering on the surface of the combustion body. Barium oxide and barium hydroxide can be used as substitutes for barium carbonate. The barium carbonate region of the barite manufacturer can be added to the glaze mixture and converted into barium oxide during melting, which improves the hardness and gloss of the glaze, and then its wear resistance. Similarly, the addition of barium carbonate to enamel can also improve its corrosion resistance and weathering strength.