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Production technology of high-purity, ultrafine and high-whiteness natural barium sulfate

A natural barium sulfate, production process technology, applied in the direction of calcium/strontium/barium sulfate, calcium/strontium/barium halide, calcium/strontium/barium compound, etc., can solve the poor dispersion of chemically synthesized barium sulfate, production Problems such as large equipment investment and complex production process achieve good economic and environmental benefits, low production cost and simple process operation

Inactive Publication Date: 2018-12-11
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of the large investment in production equipment and complex production processes, it belongs to the "three high" industries with high production costs, high energy consumption and large discharge of three wastes. Restricted items in the National Development and Reform Commission's Industrial Structure Adjustment Guidance Catalog; and chemically synthesized barium sulfate has the disadvantages of poor dispersion, high oil absorption and large specific surface area

Method used

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  • Production technology of high-purity, ultrafine and high-whiteness natural barium sulfate

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Embodiment 1

[0034] The invention discloses a process for producing high-purity, ultra-fine, high-whiteness natural barium sulfate, which is characterized by including the following processes: a crushing process, an acid leaching process, a water washing process, an evaporation concentration process, and a membrane treatment process.

[0035] S1, crushing process:

[0036] The raw barite ore is washed to remove the silt and other impurities in the raw ore. The washed ore is crushed and coarsely ground to a particle size of D90 or less than 200 mesh. Then the slurry is adjusted, the barite ore powder and water are mixed and slurryed at a ratio of 1:1, and the slurry after slurrying is finely ground to make the particle size reach D90 below 1000 mesh. The finely ground pulp is filtered by pressure to obtain filtrate and filter residue. The filtrate does not contain impurities such as acid, alkali and calcium, and is recycled in this process. The resulting filter residue enters the next process....

Embodiment 2

[0055] The invention discloses a process for producing high-purity, ultra-fine, high-whiteness natural barium sulfate, which is characterized by including the following processes: a crushing process, an acid leaching process, a water washing process, an evaporation concentration process, and a membrane treatment process.

[0056] S1, crushing process:

[0057] The raw barite ore is washed to remove the silt and other impurities in the raw ore. The washed ore is crushed and coarsely ground to a particle size of D90 or less than 200 mesh. Then the slurry is adjusted, the barite ore powder and water are mixed and slurryed at a ratio of 1:1, and the slurry after slurrying is finely ground to make the particle size reach D90 below 1000 mesh. The finely ground pulp is filtered by pressure to obtain filtrate and filter residue. The filtrate does not contain impurities such as acid, alkali and calcium, and is recycled in this process. The resulting filter residue enters the next process....

Embodiment 3

[0076] The invention discloses a process for producing natural barium sulfate with high purity, ultrafine and high whiteness, which is characterized in that it includes the following steps:

[0077] S1, crushing process:

[0078] The raw barite ore is washed to remove the silt and other impurities in the raw ore. The washed ore is crushed and coarsely ground to a particle size of D90 or less than 200 mesh. Then the slurry is adjusted, the barite ore powder and water are mixed and slurryed at a ratio of 1:1, and the slurry after slurrying is finely ground to make the particle size reach D90 below 1000 mesh. The finely ground pulp is filtered by pressure to obtain filtrate and filter residue. The filtrate does not contain impurities such as acid, alkali and calcium, and is recycled in this process. The resulting filter residue enters the next process.

[0079] S2, acid leaching process:

[0080] One stage of acid leaching: The filter residue after the fine grinding and pressure filtr...

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Abstract

The invention discloses a production technology of high-purity, ultrafine and high-whiteness natural barium sulfate. The production technology comprises a crushing procedure, an acid leaching procedure, a water washing procedure, an evaporation and concentration procedure and a membrane treatment procedure. Raw ores of barite are subjected to washed, rough milling, pulp blending and secondary finemilling, so that the granularity D90 of the ores is less than 1000 meshes or lower; then two-stage acid leaching and dust removal are carried out; then four-stage water washing is carried; after deepfine milling, drying and dust removal are carried out, high-purity and ultrafine natural barium sulfate with the purity of 94 to 98 percent, the whiteness of 94 to 98 percent and the granularity D90of 3000 to 10000 meshes or products of other grades can be obtained. The technology disclosed by the invention has extremely strong adaptability; the technology is simple to operate and low in production cost; the yield of the barium sulfate in the raw ores reaches 98 percent or more.

Description

Technical field [0001] The invention relates to a process for producing natural barium sulfate with high purity, ultrafine and high whiteness. Background technique [0002] Natural barium sulfate, barite, is a non-metallic mineral product. Pure barite is white (it is often yellow, red or gray-brown due to the influence of impurities and mixed substances) and has glass luster. Barite is a sulfate mineral. Composition is BaSO 4 . The barite crystal grains are characterized by crystalline body crystal type, and orthorhombic crystal structure. Specific gravity is 4.5, Mohs hardness is 3-3.5, melting point is 1480℃. It is an important chemical raw material, which is widely used in the production of barium salt industrial products, petroleum, natural gas mining, medical treatment, pigments, fillers, and mineralizers in the cement industry. Currently, there are two types of barium sulfate production methods. One is obtained by washing, removing impurities, grading, and crushing ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/46C01F11/28
CPCC01F11/28C01F11/462C01P2006/65C01P2006/80
Inventor 覃虎成夏海燕洪声安陈雪云李选福柳承辉张天芳
Owner ZHUZHOU SMELTER GRP
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