Continuous segregation of a binary mixture of heterogeneous (different density) solids is carried out in a gas–solid fluidized bed. We investigate how gas velocity, solids feed rate, flotsam feed composition, bottom discharge pipe diameter, and minimum fluidization velocity ratio of the flotsam to jetsam particles influence the solids holdup, separation factor, and product quality (flotsam purity at the top outlet). The results are interpreted in terms of solids holdup information. The results indicate that the separation factor decreases when the gas velocity, bottom discharge pipe diameter, flotsam feed composition, or the minimum fluidization velocity ratio increase, while the separation factor increases as the solids feed rate increases. The product quality decreases when the gas velocity, solids feed rate, or minimum fluidization velocity ratio increase, while the product quality increases as the bottom discharge pipe diameter or flotsam feed composition increase. Correlations for predicting the separation factor and product quality are proposed using a logistic model for individual flotsam feed compositions, which satisfactorily compares with the present experimental data.

异质（密度不同）固体的二元混合物的连续分离在气固流化床中进行。我们研究了气体速度，固体进料速率，浮选物进料组成，底部排放管直径以及浮选物与喷射颗粒的最小流化速度比如何影响固体滞留率，分离系数和产品质量（顶部出口的浮选纯度）。根据固形物含量信息解释结果。结果表明，当气体速度，底部排放管直径，浮选原料组成或最小流化速度比增加时，分离因子减小，而随着固体进料速率的增加，分离因子增加。当气体速度，固体进料速度，或最小流化速度比增加，而产品质量则随着底部排出管直径或浮渣进料组成的增加而增加。提出了一种针对个别浮选饲料组成的逻辑模型，用于预测分离因子和产品质量的相关性，该模型可与当前的实验数据进行令人满意的比较。