高密度分选双锥重介旋流器的数值模拟

Numerical simulation of the double-cone heavy-medium cyclone capable of effecting high-density separation

为实现高密度矿物的分选,将传统DSM型重介旋流器的单一锥角改为渐变的两个锥角,其中上锥段采用大锥角,可使悬浮液快速浓缩,提高分选密度;下锥段采用小锥角,可增大分选区间,提高分选效率。运用Fluent软件,对双锥重介旋流器内部流场进行了模拟,并与传统DSM型重介旋流器进行了对比,结果显示双锥重介旋流器内部流场更适合高密度矿物的分选。

For high-density separation of mineral, the conventional single-cone DSM H.M. cyclone is converted into a double-cone version with gradually varied taper angles. The upper conical part of the cy- clone has a larger taper angle for rapid thickening of suspension and, hence, increase of separation densi- ty while the lower conical part assumes a smaller taper angle for attaining a larger separation space and a higher separating efficiency. Numerical simulation of the double-cone cyclone＇s internal flow field is made by means of Fluent software, and the result is compared with that of the conventional DSM H.M. cy- clone. The result of comparison shows that the flow field of the double-cone version is more suitable for high-density separation of minerals.