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Iran office: Chemical Mine World Co. M.Tavajjoh TEL: +98 21 33128396 FAX: +98 21 33127708 MOBILE: +98 912 5224843
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Iran Barite ( BASO4 )PRODUCTS: Barite ( BaSO4, or barium sulphate) a name which was derived from the Greek word “barus,” meaning heavy, is the mineralogical name for barium sulfate. It is a sulfate of barium found in Iran as in tabular crystals, granules, or compact masses and has a high specific gravity (4.5). Its colors are variable (white, blue, green, yellow and red shades) and crystal system is orthorhombic. Barite occurs widely throughout the world, specially Asia and also Iran. It often occurs in hydrothermal ore veins with lead, and zinc minerals. It is insoluble in water and practically insoluble in the most chemical reagents under ordinary conditions. Barite is used the chief source of barium and its chemical compounds. Most primary barite requires some upgrading to minimum purity or density, then grinding to a small, uniform size before it is used as a weighting agent in petroleum well drilling mud or as an addition to industrial products. Pure barite contains 58.8% barium or 65.7% barium oxide. Ground barite is used as a filler in the manufacture of linoleum, oilcloth, paper and textile manufacturing, rubber, and plastics. Ground barite is used in the oil industry, e.g., as filtering and deodorizing agents in the refining of petroleum and, mixed with other materials, as drilling muds to protect the cutting bit while drilling. Barite used for drilling can be blue, black, brown, or gray depending on the ore body; must be finely ground, dense, soft, and chemically inert; must have a specific gravity of 4.2 or greater; must be free of soluble salts; and must be reduced in particle size such that 90% to 95% of the material must pass through a 325-mesh screen. A small percentage of iron oxide is allowable. Bleached barite (white barite) is used in making paint as a white pigment. Numerous types of drilling fluid systems have been used. Water-based mud systems are the oldest. The term "mud" originated because early drillers drove livestock into shallow ponds to stir up the clay pond bottoms and form a clay slurry. This slurry was used as the drilling fluid or drilling mud. As drilling became more sophisticated, finely ground bentonite replaced native clays in the water-based drilling fluids. Barite (naturally occurring barium sulfate with a specific gravity of approximately 4.3) was mined and finely ground for use as a weighting agent in the drilling fluid. The weighting agent was needed to counteract high downhole pressures to prevent "blowouts" of the column of drilling fluid. Around 1945, deeper wells were being drilled to tap the larger reserves of oil and gas. This made it necessary to weight drilling muds more heavily with barite and add more bentonite to suspend the barite and the cuttings. A consequence of heavier mud weights was higher pumping pressures resulting from denser fluids and increased fluid viscosity. Higher pumping pressures resulted in greater fluid loss into drilled formations and higher water loss from the drilling fluid. This water loss further compounded the problem of fluid flow. It became apparent that an improved drilling fluid was needed to increase the efficiency of drilling the deeper wells. SYNONYMS: baryte; barytine; cawk; heavy spar; Barium sulfate; Sulfuric Acid, Barium Salt (1:1); PHYSICAL STATE: white, blue, green, yellow or red shades crystal MELTING POINT: 1580 C PRODUCTS:
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