The Behavior of KBF4in Potassium-Cryolite-Based Melts

2015 ◽  
Vol 162 (4) ◽  
pp. H283-H286 ◽  
Author(s):  
A. Kataev ◽  
O. Tkacheva ◽  
A. Redkin ◽  
A. Rudenko ◽  
A. Dedyukhin ◽  
...  
Keyword(s):  
Potassium Cryolite

Efficient Assessment of Physico-Chemical Properties of the Cryolite Melts for Research on the Improvement of Low-Temperature Aluminum Electrolysis

2018 ◽  
Vol 284 ◽  
pp. 839-844 ◽  
Author(s):  
V.A. Lebedev ◽  
Andrey A. Shoppert
Keyword(s):  
Low Temperature ◽  
Chemical Properties ◽  
Aluminum Electrolysis ◽  
Total Power ◽  
Potassium Cryolite ◽  
High Magnitude ◽  
Rate Of Dissolution ◽  
Physico Chemical ◽  
Hazardous Production ◽  
High Level

Modern aluminum electrolysis in cryolite-alumina melts is energy-intensive, inefficient and environmentally hazardous production. Addressing these significant shortcomings, the technology of low-temperature electrolyte is directed. The basis of low-temperature electrolysis is potassium cryolite, which results in high magnitude and rate of dissolution of alumina. Additive of sodium and lithium fluorides provide the necessary conductivity. Experimental investigation of these properties is extremely time consuming. In this work, as a parameter, which will allow to characterize effectively and rapidly the complexing ability of cryolite melts, the ratio of cationic ion power of Al3+ to the total power of the other cations of the melt is proposed. Regression analyses of the known experimental data establish the existence with a high level of reliability (R2=0.966-0.995) of a directly proportional dependence of this parameter on solubility of alumina and electrical conductivity of cryolite melts.

Ionic micro-structure and transport properties of low-temperature aluminium electrolytes containing potassium cryolite and sodium cryolite

2019 ◽  
Vol 21 (30) ◽  
pp. 16573-16582 ◽  
Author(s):  
Xiaojun Lv ◽  
Zexun Han ◽  
Chaohong Guan ◽  
Liangxing Jiang ◽  
Shangyuan Wu
Keyword(s):  
Low Temperature ◽  
Transport Properties ◽  
Atomic Level ◽  
Micro Structure ◽  
Potassium Cryolite ◽  
Insight Into

Insight into the ionic micro-structure and transport properties of low-temperature aluminium electrolytes containing potassium cryolite and sodium cryolite at an atomic level.

scholarly journals Electrical conductivity of low-temperature sodium-potassium cryolite melts

2019 ◽  
Vol 12 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Emília Kubiňáková ◽  
Ján Híveš ◽  
Vladimír Danielik ◽  
Andrea Červenková ◽  
Michaela Benköová
Keyword(s):  
Electrical Conductivity ◽  
Potassium Fluoride ◽  
Sine Wave ◽  
Regression Equations ◽  
Sodium Potassium ◽  
Potassium Cryolite ◽  
Literary Sources ◽  
Tube Type ◽  
Constant Distance ◽  
Electrolyte Resistance

Abstract Electrical conductivity of NaF-KF-AlF3 melts with different ratios of sodium fluoride and potassium fluoride was measured using a pyrolytic boron nitride tube-type cell with constant distance of electrodes. Molar cryolite ratios MR = (n(NaF) + n(KF))/n(AlF3) varied from 1.5 to 1.2 (with a step 0.1) in the temperature range of (675—900) °C. AC-techniques with a sine wave signal with small amplitude in the high frequency range were applied. Electrolyte resistance was obtained from nonlinear regression analysis according to equivalent circuit. Concentration and temperature dependency of electrical conductivity was described and defined. Experimental data were compared with literary sources and regression equations.

Sedimentation behavior of high-temperature concentrated colloidal suspension based on potassium cryolite

2018 ◽  
Vol 39 (10) ◽  
pp. 1492-1501 ◽  
Author(s):  
Andrey S. Yasinskiy ◽  
Petr V. Polyakov ◽  
Yan V. Voyshel ◽  
Tatiana R. Gilmanshina ◽  
Sai Krishna Padamata
Keyword(s):  
High Temperature ◽  
Colloidal Suspension ◽  
Sedimentation Behavior ◽  
Potassium Cryolite

Initial 1000A Aluminum Electrolysis Testing in Potassium Cryolite-Based Electrolyte

2013 ◽  
pp. 1289-1294 ◽  
Author(s):  
John Hryn ◽  
Olga Tkacheva ◽  
Jeff Spangenberger
Keyword(s):  
Aluminum Electrolysis ◽  
Potassium Cryolite
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