磁铁矿粉粒度级配对重悬浮液特性影响的研究

Influence of size consist of magnetite powder on characteristics of heavy-medium suspension

为了探究磁铁矿粉粒度级配对重悬浮液稳定特性以及黏度特性的影响,分别采用沉降试验、黏度测试试验测定了粒级<0.045mm,磁性物含量分别为70%,80%,90%的磁铁矿粉所配制的重悬浮液的稳定性以及黏度。试验结果表明:当煤泥含量一定时,磁铁矿粉粒度越小,配制的重悬浮液稳定性越好,重悬浮液黏度越高;当黏度一定时,磁铁矿粉粒度越小,所配置的重悬浮液所需的煤泥含量就越少。该试验可为实际重介生产中采用不同粒度磁铁矿粉时,合理控制重悬浮液中的煤泥含量提供数据支撑。

In order to explore the influence of size of magnetite powder on stability and viscosity characteristics of heavy-medium suspension,both sedimentation and viscosity tests are conducted with the medium suspension prepared using the<0.045 mm magnetite powder with contents of magnetics of 70%,80%and 90%.As revealed by test results,when the content of coal slime in suspension remains consistent in all cases,the finer the size of magnetite powder,the higher the stability and viscosity of the suspension;and when viscosity remains unchanged,the finer the size of magnetite powder,the less the amount of coal slime required for preparing the suspension is needed.The test results provide a data basis for realizing rational control of content of coal slime in medium suspension in the case of washing the raw coal with different washability,using different sizes of magnetite powder.