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Vol 196
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Effect of potassium on the solubility of aluminum hydroxide in alkaline aluminate solutions аnd their decomposition

V. N. Brichkin1
E. A. Alekseeva2
N. V. Nikolaeva3
E. E. Gordyushenkov4
About authors
  • 1 — Saint-Petersburg State Mining University
  • 2 — Saint-Petersburg State Mining University
  • 3 — Saint-Petersburg State Mining University
  • 4 — Saint-Petersburg State Mining University
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Materials of calculation of solubility of aluminum hydroxide in the system Na2O – K2O – Al2O3 – H2O, by data of the solubility in the private sections of this system for a wide range of compositions aluminate solutions by the content of alkaline components are  presented. It  is shown that the solubility of aluminum hydroxide in the range of concentration of alkaline components from 1,29 mol/l to 1,94 mol/l is a linear function of the mol fraction of one of them. The results of experimental researches on decomposition of aluminate solutions are given. Significant increase of the degree of decomposition of aluminate solutions in per cents of the theoretical values with growth of mol fraction of K2O in  a mixture of alkaline components has been established.

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  1. Бричкин В.Н. Закономерности декомпозиции алюминатных растворов в системе Na2O – K2O – Al2O3 – H2O / В.Н.Бричкин, В.В.Радько, В.В.Васильев, Н.А.Новиков // Цветные металлы Сибири – 2009. Красноярск, 2009. С.162-165.
  2. Лайнер Ю.А. Изотермы растворимости в системе Na2O – K2O – Al2O3 – H2O при 20, 60 и 95 оС / Ю.А.Лайнер, И.Н.Китлер // Металлургия цветных и редких металлов. 1968. С.191-194.
  3. Лейтейзен М.Г. Расчетная плотность натриево-калиевых алюминатно-щелочных растворов при температуре 25 оС / М.Г.Лейтейзен, Т.И.Виноградова // Производство глинозема. Труды ВАМИ. 1975. № 91. С.128-129.
  4. Справочник металлурга по цветным металлам. Производство глинозема / Под ред. Ю.В.Баймакова, Я.Е.Канторович. М., 1970. 320 с.
  5. Yanli Xie. Study on the effect of K2O on seed precipitation in sodium aluminate liquors / Yanli Xie, Qun Zhao, Zhenan Lu, Shiwen Bi // Light Metals. 2006. P.159-163

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