论文部分内容阅读
用浮选法回收复杂硫化矿石中的矿物时,一般是高密度矿物的冶金回收率比低密度矿物低。例如,在Ag—Pb—zn一脉石系中,细粒的银和铅矿化物的回收率很低。当这些矿石的磨矿在以旋流器为分级设备的闭路流程中进行时,情况更是如此。当矿物粗粒嵌布时,由于旋流器的作用,大密度的矿物会产生过磨。循环负荷通常很大,导致重矿物过磨。本文提出了一种分析一般磨矿流程的方法,该法也适用于改进的流程,流程的改进是把一排单元浮选槽引入磨矿回路,目的是浮出一种或几种矿物。文中提出的方法,利用磨矿—分级—浮选的动力学模型。计算了分级和浮选过程的冶金回收率。还计算了过程的其它参数,并与模拟普通磨矿流程所得的数据作了比较。按迭代算法建立了数字模拟程序,为了模拟能再现工业生产的实际情况,程序中把磨矿、分级和浮选的模型组合起来。
When flotation is used to recover minerals from complex sulfide ores, it is common for high-density minerals to have a lower metallurgical recovery than low-density minerals. For example, in the Ag-Pb-Zn a gangue system, the recovery of fine-grained silver and lead minerals is low. This is particularly the case when the grinding of these ores is carried out in a closed-circuit process with a cyclone as a staging device. When the mineral coarse cloth embedded, due to the role of the cyclone, large mineral density will produce over grinding. The cyclic load is usually large, leading to heavy minerals over grinding. This paper presents a method for the analysis of general grinding processes that is also applicable to an improved process. The improvement of the process is to introduce a row of unit flotation cells into the grinding circuit in order to float one or more minerals. The proposed method uses the kinetic model of grinding-classification-flotation. Metallurgical recovery rates were calculated for the classification and flotation processes. Other parameters of the process were also calculated and compared with those obtained from simulating normal grinding processes. The numerical simulation program was established by iterative algorithm. In order to simulate the actual situation of reproducing industrial production, the programs of grinding, grading and flotation were combined.