1.Zhengzhou Research Institute of Chalco, Zhengzhou 450041，China； 2.College of Metallurgical Science and Engineering, Central South University, Changsha 410083,China
Abstract： A low temperature sintering - water immersion fluid conductivity method was used for the determination of molecular ratio of the new alkaline andpotassium-contained aluminum electrolyte for low temperature aluminum electrolysis. The applicability of the alkaline and potassium-contained electrolyte for the conductivity method and its formula was investigated, and the regression fitting of the conducting temperature coefficient of water immersion fluid was done. The measured formula for the determination of molecular ratio of the new alkaline and potassium-contained aluminum electrolyte was established. The study showed that the new aluminum electrolyte could be fully dissolved in the aqueous solution through adding excess of NaF and low-temperature sintering, and its conductivity could be quickly determined by the industrial-type conductivity meter. The molecular ratio of new alkaline and potassium-contained aluminum electrolyte could be calculated by new fitting formula. This method was applied to determine the molecular ratio of the new alkaline and potassium-contained aluminum electrolyte, of which the molecular ratio was 1.8 to 4.0 and the KF content was 0% to 15%. The relative standard deviation of the measured results was less than 0.40%.
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