论文部分内容阅读
根据阿基米德原理测量了低温铝电解质Na3 AlF6-AlF3 -Al2 O3 (3% ) -CaF2 (3% ) -MgF2(3% ) -NaCl体系的密度 ,通过回归正交设计计算得到了NaCl含量 (B/ % ) ,冰晶石分子比(CR) ,电解温度 (T/℃ )与电解质密度 (ρ)之间关系的回归 :方程 ρ =4 .35 4 - 8.4 6 4× 10 -3 T+1.983(CR) +2 .0 2 3× 10 -2 B - 2 .882× 10 -4T(CR) +4.70 7× 10 -5TB - 1.6 2 8× 10 -2 (CR)B+4.10 9× 10 -6T2 - 3.84 1× 10 -1(CR) 2 - 2 .0 14× 10 -3 B2 以及经简化方程 :ρ =2 .730 5 - 1.2 2 5× 10 -3 T +2 .2 0 4× 10 -1(CR) - 2 .0 14× 10 -3 (B - 8.2 92 ) 2 ,并讨论了NaCl含量对低温铝电解质密度的影响 ,实验结果表明 :氯化钠含量为 12 %、分子比为 1.5时 ,电解质与铝液的相对密度差大于 15 %。
The density of low temperature aluminum electrolyte Na3 AlF6-AlF3 -Al2 O3 (3%) -CaF2 (3%) -MgF2 (3%) -NaCl was measured according to the principle of Archimedes. The NaCl content was calculated by regression orthogonal design (B /%), cryolite molecular ratio (CR), electrolysis temperature (T / ° C) and electrolyte density (ρ): Equation ρ = 4 .35 4 - 8.4 6 4 × 10 -3 T + 1.983 (CR) +2 .0 2 3 × 10 -2 B - 2 .882 × 10 -4 T (CR) +4.70 7 × 10 -5 TB - 1.6 2 8 × 10 -2 (CR) B + 4.10 9 × 10 -6T2 - 3.84 1 × 10 -1 (CR) 2 - 2.04 × 10 -3 B2 and the simplified equation: ρ = 2 .730 5 - 1.2 2 5 × 10 -3 T +2. 2 0 4 × 10 -1 (CR) -2.0 14 × 10 -3 (B - 8.2 92) 2. The effect of NaCl content on the density of low temperature aluminum electrolytes was also discussed. The experimental results show that the sodium chloride content is 12% When 1.5, the relative density difference between electrolyte and molten aluminum is more than 15%.