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GROUND CALCIUM CARBONATE FROM VIETCARB-VIETNAM VIETCARB (Vietnam) Ground Calcium Carbonate - One of the Purest, finest and less abrasive mines in world. We deal in Vietnam Ground Calcium Carbonate from VIETCARB TECHNICAL SPECIFICATIONS OF GROUND CALCIUM CARBONATE OF VIETCARB Whiteness: Min 98% Brightness: Min 96% CaCO3: min 98.98% Fe2O3: max 0.02% MgCO3: max 0.21% SiO2: max 0.12% Al2O3: max 0.03% AUTHORIZED DISTRIBUTORS OF CALCIUM CARBONATE FROM GULSHAN SUGARS & CHEMICALS, MARUDHAR CALCIUM P. LTD. & KALI INDIA P. LTD. Calcium Carbonate is a chemical compound with the chemical formula CaCO3. It is a common substance found in rocks in all parts of the world. The vast majority of calcium carbonate used in the world is extracted by mining or quarrying. Alternatively, calcium carbonate is prepared by calcining crude calcium oxide. Water is added to give calcium hydroxide, and carbon dioxide is passed through this solution to precipitate the desired calcium carbonate, referred to in the industry as precipitated calcium carbonate (PCC). PCC is used in applications that demand exacting specifications of particle size, particle size distribution and physical colour. The activation of Stearic Acid is carried out on CaCO3 for specific requirements. Calcium carbonate is widely used as an extender in paints, in particular matt emulsion paint. Calcium carbonate is also widely used as a filler in plastics. Some typical examples include loading of chalk in unplasticized polyvinyl chloride (uPVC) drain pipe and loading of stearate coated chalk or marble in uPVC window profile. PVC cables also use loading to improve mechanical properties (tensile strength and elongation) and electrical properties (volume resistivity). Polypropylene compounds are often filled with calcium carbonate to increase rigidity, a requirement that becomes important at high use temperatures. It also routinely used as a filler in thermosetting resins (Sheet and Bulk moulding compounds) and has also been mixed with ABS and other ingredients. Technical specifications of PRECIPITATED CALCIUM CARBONATE
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Parameter
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Value
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Colour
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Bright White
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Odour
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Odourless
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Texture
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Fine Powder
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Crystalline Form
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Texture
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Apparent Density
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0.63
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Coating % of Sodium Stearate
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1.5%
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Water Proofing
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95%
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Solution in Hydrochloric Acid 5N
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Clear
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Soluble Alkali (as Na2O) as per IS:918-1968
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Less than 0.2%
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pH
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9.8+0.5
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Calcium Carbonate, CaCO3 min. (Test method as in IS:918 -1968)
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98.5%
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Iron, Fe max
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0.01%
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Manganese, Mn max
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0.003%
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Fluoride, F max
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0.05%
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Phosphate, PO4 max
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0.07%
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Sulphate SO4 max
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0.25%
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Silica, SiO2 max
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0.075%
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Aluminium, Iron, Phosphates and matter insoluble in Hydrochloric Acid as per IS:918-1968 max.
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0.5%
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Magnesia, MgO max
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0.5%
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Lead, Pb max
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10 p.p.m.
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Copper, Cu max
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5 p.p.m.
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Arsenic, As max
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2 p.p.m.
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Chloride, Cl
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Trace
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Specific Gravity
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2.65 to 2.8
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Loss on Drying at 105oC (%)
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0.5 to 0.8
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All Percentages on weight basis
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