Barite

What is barite

Barite is a non metallic mineral product with barium sulfate (BaSO4) as the main component. Pure barite is white and glossy. Due to the influence of impurities and mixed substances, it is often gray, light red and light yellow. Barite with good crystallization can also appear as transparent crystal. China is rich in barite resources, which are distributed in 26 provinces, municipalities and autonomous regions, mainly concentrated in the south. Guizhou Province accounts for one third of the total reserves of the country. Hunan and Guangxi rank second and third respectively in China. Barite deposits in China are not only large in reserves, but also high in grade. Barite deposits in China can be divided into four types, namely sedimentary deposits, volcanic sedimentary deposits and hydrothermal deposits And residual slope deposit. Barite is chemically stable, insoluble in water and hydrochloric acid, non-magnetic and toxic, and can absorb X-ray and gamma ray.

Application of barite

Barite is a very important non-metallic mineral raw material, which has a wide range of industrial uses.

① Drilling mud weighting agent: in some oil wells and gas wells, adding barite powder to the mud is an effective measure to increase the mud weight, and is the most commonly used measure to effectively avoid frequent blowout accidents.

② Lithopone pigment: barium sulfate can be reduced to barium sulfide (BAS) by heating barium sulfate and reducing agent, and then react with zinc sulfate (ZnSO4). The mixture of barium sulfate and zinc sulfide (BaSO4 accounting for 70% and ZnS accounting for 30%) is the lithopone pigment. It can be used as raw material of paint and painting pigment. It is a kind of commonly used high quality white pigment.

③ Various barium compounds: Barite can be used to produce barium oxide, barium carbonate, barium chloride, barium nitrate, precipitated barium sulfate, barium hydroxide and other chemical raw materials.

④ For industrial fillers: in the paint industry, barite powder filler can increase the film thickness, strength and durability. In the field of paper making, rubber and plastics, barite stone can improve the hardness, wear resistance and aging resistance of rubber and plastic; lithopone pigment is also used to make white paint, which has more advantages than lead white and magnesium white in indoor use.

⑤ Mineralizer for cement industry: in cement production, the use of barite and fluorite composite mineralizer has obvious effect on promoting the formation of C3S and activating C3S, and the quality of clinker has been improved.

⑥ Ray proof cement, mortar and concrete: using barite to absorb X-ray, barium cement, barite mortar and barite concrete are made from barite, which are used to shield nuclear reactors and build buildings for preventing X-ray in scientific research and hospitals.

⑦ Road construction: Rubber and asphalt mixture containing about 10% barite has been successfully used in parking lots and is a durable paving material.

⑧ Others: mix barite with oil and apply it on cloth base to make oilcloth; barite powder is used to refine kerosene; it is used as digestive tract contrast agent in pharmaceutical industry; it can also be used to make pesticide, leather and fireworks. In addition, barite is also used to extract barium metal, as getter and binder for television and other vacuum tubes. Barium is alloyed with other metals (aluminum, magnesium, lead, calcium) and is used in bearing manufacturing.

Barite milling process

The first stage: crushing of raw materials

The fine aggregate enters into the crusher by the crushing machine with a mass of fine powder (50 mm to 15 mm).

The second stage: grinding

After crushing, the small barite materials are sent to the storage hopper by the elevator, and then evenly and quantitatively fed into the grinding chamber of the mill by the feeder for grinding.

Stage three: grading

The milled materials are graded by the grading system, and the unqualified powders are returned to the host machine for regrinding after being graded by the classifier.

Stage four: collection of finished products

The powder meeting the fineness will flow through the pipeline into the dust collector for separation and collection. The collected finished powder will be sent to the finished product bin by the conveying device through the discharge port, and then packaged by powder loading tanker or automatic packer.