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handbook of extractive metallurgy IV Part 11

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Tham khảo tài liệu 'handbook of extractive metallurgy iv part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 2254 Handbook of Extractive Metallurgy impurities which meets the requirements of the chemical industry. Dead-burned dolomite is a highly sintered form of dolomitic quicklime which is used primarily as a basic refractory. Dolime refers to calcined dolomite. Dolomite is strictly speaking the double carbonate containing 54-58 of CaCO3 and 40-44 of MgCO3. This term is however frequently used to describe dolomitic limestone. Dolomitic limestone is generally understood to contain 20-44 of MgCO3. Fine quicklime generally refers to screened products with a top size below 0.6 cm. Free lime is an analytical term for the calcium oxide component of quicklime or hydrated lime. It excludes calcium oxide in CaCO3 Ca OH ọ and calcium silicates. Granular quicklime usually refers to screened products with a top size of 0.5-2.5 cm. Ground quicklime refers to powdered products produced by milling. Hard-bunted quicklime is a sintered form of quicklime with low reactivity to water. High-calcium limestone is a general term for limestone consisting mainly of CaCO3 and having a low content of MgCO3 max. 5 . Similarly high-calcium quicklime contains mainly CaO and not more than 5 MgO. Hydrated lime is a diy powder produced by reacting quicklime with controlled amounts of water. Hydraulic limestone is an impure carbonate containing considerable amounts of silica and alumina. Calcination of hydraulic limestone produces hydraulic lime which after mixing with water has cementing or hydraulic properties and is capable of setting under water. Iceland spar is a rare and very pure form of crystalline limestone. It is transparent and has been used in optical instruments. Light-bunted quicklime is quicklime that is lightly sintered and has a high reactivity to water. Lime putty is a viscous dispersion of calcium hydroxide in water. Lump quicklime usually refers to products with a top size above 2 cm. Magnesian limestone is generally understood to be mainly CaCO3 with 5-20 of MgCO3. Marble is a .