立式搅拌磨的选择性细磨解离行为研究及工业实践

Research and Application of Selective Liberation of Fine Grained Minerals by Vertical Stirred Milling

以磁铁矿为例，进行了主要有用矿物磁铁矿与主要脉石矿物石英的力学性能简化计算，并通过实验室搅拌磨机应力强度模型进行了介质运动力、能量的简化计算，阐述了立式搅拌磨机磁铁矿的选择性解离的理论基础；在此基础上，进行了磁／赤铁矿选择性细磨解离的搅拌磨·球磨对比试验，试验结果明确了搅拌磨能够选择性地提高磁铁矿解离度：在同等磨矿细度下，可获得更高品位的铁精矿。同时，立式搅拌磨在钼矿的应用实践也表明立式搅拌磨对辉钼矿细磨具有选择性。

Using magnetite as an example, mechanical properties values of magnetite and quartz was calculated simply from compressive strength, and impact force and energy of media in laboratory stirred mill were determined using stress intensity model. Results indicated that magnetite can be selective liberated during grinding in stirred mill. In the comparing test of magnetite fine grinding by stirred milling and ball milling, it was found that the stirring mill can selectively improve the liberated degree of magnetite, under the same grinding fineness, a higher grade iron concentrate would be obtained by stirred milling. Application in molybdenum ore also shows that stirred mill grinding can selectively milling molybdenite into finer and liberated particles.