Barite hardness

Performance The dry pan is usebil for crushing medium-hard and soft materials such as clays, shales, cinders, and soft minerals such as barites. Materials fed should normally be 7.5 cm (3 in) or smaller, and a produc t able to pass No. 4 to No. 16 sieves can be dehvered, depending on the hardness of the material. 

Soft crystalline solid rhombic crystal pure salt is white but color may vary the color of the mineral barite may vary among red, yellow, gray or green depending on impurities density 4.50 g/cm refractive index 1.64 melts around 1,580°C decomposes above 1,600°C hardness 4.3 to 4.6 Mohs insoluble in water (285 mg/L at 30°C) and alcohol Ksp 1.1 x 10-i° soluble in concentrated sulfuric acid. 

BARITE. The mineral barite is barium sulfate, BaSOa crystallizing in the orthorhombic system. It may occur as tabular crystals, in groups, or lamellar, fibrous and massive, Barite has two perfect cleavages, basal and prismatic hardness, 3-3.5 specific gravity, 4.5, which has led to the term heavy spar, occasionally used for this mineral. Its luster is vitreous streak, white color, white to gray, yellowish, blue, red and brown transparent to opaque, it sometimes yields a fetid odor when broken or when pieces are rubbed togedier, due probably to the inclusion of carbonaceous matter. It is used as a source of barium compounds. 

BARYTOCALCITE. This mineral is a carbonate of barium and calcium il crystallizes in the monoclinic system but occurs massive as well. Il lias a perfect cleavage parallel to the prism and one, less perfect, parallel to the base fracture, sub-conchoidal brittle hardness, 4 specific gravity, 3.66-3.71 luster, vitreous color, white or gray or may be greenish or yellowish transparent to translucent. Barytocalcite is found in Cumberland. England, associated with barite and fluorite. 

Properties Colorless, white, pale-blue or red, luster vitreous to pearly. Resembles barite. D 3.95, Mohs hardness 3-3.5. 

Bastnaesite from Mountain Pass ore (hard-rock ore) is processed as follows. After comminution, the ground ore is subjected to hot-froth flotation. However, gangue minerals like calcite, barite or celestite may cause problems in flotation, because they have flotation properties similar to bastnaesite. For this, special treatment has been devised, consisting of six different (steam) conditioning steps... 

Fillers, generally inorganic materials such as calcium carbonate, barite, silicate, kaolin, or china clay, are used primarily to lower costs and also to impart special properties such as hardness, abrasion resistance, and no sticking. 

Other scales, such as calcium sulfate (CaSO and barium sulfate (BaSO ) are only slightly soluble in acid. Both are soluble in complexing agents such as EDTA and other carboxylic acid-type chelating agents. Barite can be very hard and thus chemically impenetrable, or it can be fine and soft, thereby enabling mechanical removal or partial chemical removal. Barite sometimes occurs in mixed-scale deposits, wherein an acid-soluble portion (e.g., calcium carbonate) can be removed, along with subsequent physical removal of the barite portion. 

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