Introduction to barite
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Mineral name: barite.
Chemical composition: (Ba, Sr)SO 4 , Ba content is greater than Sr content.
Crystalline state: crystalline body.
Crystal system: orthorhombic system.
Mohs hardness: 3 to 4.
Common colors: colorless to red, yellow, green, blue and brown.
Cleavage: The two groups are completely cleavage.
Density: 4.50 (+0.10, -0.20) g/cm 3 .
Polychromaticity: None to weak, due to different colors.
Photographic characteristics: heterogeneous, biaxial crystal, positive light.
Birefringence: 0.012.
Refractive index: 1.636 ~ 1.648 (+0.001, -0.002).
UV fluorescence: fluorescence and phosphorescence occasional weak blue or light green.
Absorption spectrum: no characteristics.
Magnification check: There are often many inclusions, and there are some gas-liquid two-phase inclusions.
Special optical effects: not seen. Optimization processing: unknown.
Crystal habits: plate-like, sometimes columnar, granular, fibrous aggregates, or stalactite-like, tuberculous aggregates.
Barite is an important industrial mineral raw material for the preparation of bismuth and antimony compounds. There are three main functions in industrial production: the preparation of antimony compounds, barite powder and zinc antimony white.
At present, there is no known barite deposit in the city, only one mine is found, and Fangzhuang is in the tube shop.
Ore body in the Proterozoic Zhangbaling group and at Five Rivers group, containing aluminum, zinc, barite, barite, quartz veins form of fat. The ore body is fat and irregular, with bifurcation, compounding, expansion and contraction, and clear boundary with surrounding rock. The ore body is generally 40-165 meters long, up to 513 meters long and 0.15-6.65 meters wide. Generally 4-5 meters, the deepest right is more than 70 meters. Barium sulfate-containing ore 85-95%, 0.65-3.32% Pb, 0.3-0.79% zinc, in addition, the ore still containing 5% strontium. The mineral components are mainly barite, quartz, galena, sphalerite and the like.
The deep processing of barite is the direction of the development of barite. According to the relevant information, several products after deep processing of barite - precipitated barium sulfate, sodium sulfide, barium sulfate sales are very good, predicting the future market demand is large, economic benefits are considerable, is a promising product. At present, there are more than 20 barite deep processing enterprises in China, and most of them are small. Henan Jixian Chemical Plant is a barite deep processing plant built in 1984, which has achieved good returns and its experience in building factories can be used for reference.
Barite is the most widely distributed strontium-containing mineral in nature. It can be replaced by a complete analogy of the same type, forming a lapis lazuli; replaced by lead, forming a Beitou stone (named after the birth of Beitou Hot Spring in Taiwan). Orthogonal (oblique) crystal system, the crystal is often thick plate. Pure barite is transparent and colorless, generally white, light yellow, glass luster, and the cleavage surface is pearly. Complete and medium cleavage in 3 directions, Mohs hardness 3 to 3.5, specific gravity 4.5. It is mainly formed under medium and low temperature hydrothermal conditions. China's Hunan, Guangxi, Qinghai, Xinjiang and other real estates have huge barite veins. Residual and slope deposits of chemical deposits and weathering genesis are of great significance in individual countries. The reserves of residual barite sands in Missouri, USA, amount to 20 million tons. The main use of barite is as a weighting agent for oil drilling mud and a chemical for the preparation of barium and a white pigment - zinc barium white (Lide powder); and used as a filler for rubber, paper, cloth, paint, plastics, etc. A coagulant that acts as a radiation shield; a flux in glass production that increases the brightness of the glass.
Barite is barium sulfate (BaSO 4) non-metallic minerals as a main component, barite substantially pure white, glossy, and the influence of impurities mixing was also often has a gray, pale red, pale yellow, etc., Barite, which is quite well crystallized, can also appear as a transparent crystal. The barite has a hardness of 3 to 3.5 (Mohs) and a specific gravity of 4.3 to 4.7, and has the characteristics of large specific gravity, low hardness, and brittleness. Barite is chemically stable, insoluble in water and hydrochloric acid, non-magnetic and toxic.
Identification features: plate crystal, hardness, complete cleavage near the right angle, high density, no sputum in the case of hydrochloric acid, and thus distinguished from similar calcite .
Barite is mainly formed under medium and low temperature hydrothermal conditions. There are huge barite veins in Hunan, Guangxi, Qinghai and Xinjiang. Barite is a raw material for extracting bismuth. It can be used as a mud weighting agent for drilling, and can be used as a filler for various white pigments, coatings, and rubber and paper industries.
Barite has the characteristics of large specific gravity, low hardness and brittleness. Chemically stable, non-magnetic and toxic. In the industry, industrial products such as barium chemical barite powder and zinc barium white are produced. There are also important uses in the petroleum industry, the nuclear industry and the electronics industry.
Zhaotong City barite ore, often with various sulfides (pyrite, brass, galena, sphalerite), oxides and quartz, Jasper, magnesite, siderite manganese ore, celestite, firefly Minerals such as stone are symbiotic. The heavy stone mines in Yongshan, Yanliang, Zhenxiong and other counties are mostly gangue minerals of lead-zinc mines. The barite discovered in the Yongshan Jinsha lead-zinc mine is produced in quartz, fluorite, lead-zinc ore belts, and the plane distribution is extended in the northwest direction, distributed in the tectonic space of the top of the anticline and the gently inclined section of the north wing. The mineral combination is more complex, mainly quartz, and is characterized by barite and fluorite. The barite produced in the Jinsha lead-zinc mine is white and has a semi-self-shaped, self-shaped and plate-like radial structure. The particle size is generally from 0.5 to 5.0 mm, and some are fine particles of 0.1 mm. The provenance of barite has been found to be 522,339 tons. There is a single barite deposit in the Iron Works of Zhenba Township, Zhenxiong County. There are 3 barite veins, which are produced in parallel, with a thickness of 0.8 to 1.2 meters and a length of more than 300 meters. Produced in the Lower Permian Yangxin limestone. It is a white barite with excellent texture.
At present, due to the lack of geological work on barite resources, it is still difficult to make a comprehensive and correct evaluation. According to scientific and technological information, the demand for barite in foreign countries is increasing year by year. It is necessary to pay attention to the exploration of barite resources in this region and strive to export in the future.