【摘要】 用三因子二次回归正交设计方案,对黔中铝土矿进行溶出试验。实验结果经处理后得到氧化铝的溶出率（η_A,％）与溶出温度（℃,X₃）、苛性碱浓度（g/L,X₂）和石灰添加量（％,X₁）相互关系的数学模型: η_A=817.7+13.48X₁-0.485X₂-6.484X₃-4.673×10^-3X₁X₂-3.551×10^-2X₁X₃-2.739×10^-4X₂X₃-0.1839X₁²+1.491×10^-3X₂²+1.479×10^-2X₃²利用该数学模型可以指导生产,寻找更经济合理的高压溶条件。在其它溶出条件一定时,石灰添加量有一最佳值,该值随温度的升高而减小,ηA值却增大。但生产上不宜超过这一最佳值太多,否则会使技术经济指标恶化。本实验发现石灰的添加量与溶出温度的交互作用是不容忽视的。贵工1^#催化添加剂,能使η_A提高6.6～11.2％。这是一个很有使用价值的添加剂。更多还原

【Abstract】 The writers have made a test of Leaching the Qianzhong bauxite according to a scheme of three-factor quadratic regressive cross design. The result of test having been processed, a model is obtained, Which represents the relation between the leaching rate of alamina （η_A%） and the leaching temperature （C,X）, the concentration of caustic alkali （g/1,x₂）and the amount of lime added（%,x₁）。 η_A=817.7+13.48X₁-0.485X₂-6.484X₃-4.673×10^-3X₁X₂-3.551×10^-2X₁X₃-2.739×10^-4X₂X₃-0.1839X₁²+1.491×10^-3X₂²+1.479×10^-2X₃² The model being used to guide production, more advantageous and reasonable conditions of leaching under high pressure may be found. When other Conditions remain constant, the amount of lime added has an optimum value, and it Will decrease with the increase of the 1eaching temperature, While the value of η_A will increase at the Same time. But in production this value can not be exceeded too much, otherwise the technical and economic indexes will deteriorate. The interaction between the amount of lime added and the leaching tempera-ture Should not be neglected. The Guigong catalyst NO.1 can increase the value of η_A by 6.6～11.2%. It is an efficacious additive.更多还原