Granular cryolite and preparation method capable of regulating and controlling molecular ratio thereof
A cryolite and granular technology, which is applied in the field of granular cryolite and its preparation, can solve the problems of brittle ice and increased cost, and achieve the effects of stable quality, easy control and high hardness.
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reference example 1
[0034] The preparation method of the seed solution obtained by the preliminary ammoniation of sodium fluorosilicate: mix 600kg of sodium fluorosilicate with 14m 3 Cryolite mother liquor (the main component concentration is: F: 8.4g / L, Na: 4.1g / L, NH 4 + : 22.4g / L, specific gravity 1.05), stir the ingredients in the reaction tank, add ammonia water until the pH value is 7, and aging for 40min, serve.
[0035] Preparation method of sodium aluminate solution: prepare 4.4m 3 Sodium hydroxide solution with a mass concentration of 33.2wt%, steam heated to 110°C, add 3000kg aluminum hydroxide, stir and react until the solution is clear, to obtain sodium aluminate solution (wherein, the concentration of Al is 198.72g / L, the concentration of Na It is 218.96g / L, and the causticity ratio is 1.29).
reference example 2
[0037] Preparation method of sodium aluminate solution: prepare 4.4m 3 Sodium hydroxide solution with a mass concentration of 33.1wt%, steam heated to 115°C, add 3000kg aluminum hydroxide, stir and react until the solution is clear, to obtain sodium aluminate solution (wherein, the concentration of Al is 197.37g / L, the concentration of Na It is 212.98g / L, and the causticity ratio is 1.2).
reference example 3
[0039] Preparation method of sodium aluminate solution: prepare 4.4m 3 32.4wt% sodium hydroxide solution, steam heated to 120℃, add 3000kg aluminum hydroxide, stir and react until the solution is clear, to obtain sodium aluminate solution (wherein, the concentration of Al is 185.44g / L, and the concentration of Na is 196.88g / L, caustic ratio is 1.25).
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