为了研究混合矿物的分级行为,用磁铁矿和石英的混合矿样在螺旋分级机中进行了一系列分级试验。磁铁矿和石英的混合矿样采用磁选分离。粒度分析联合使用筛分法和麦克罗特雷克(Microtrac)激光粒度分析仪。 结果表明,混合矿的实际效率曲线和单一矿物的实际效率曲线的形状是类似的;混合矿的实际效率曲线可由单一矿物的实际效率曲线迭加得到。混合矿的折算效率曲线象单一矿物的折算效率曲线一样,在一定围范内是一条不随操作条件而变化的“S”形曲线。单一矿物的校正分离粒度可以从混合矿物的校正分离粒度计算得到。 In order to study the grading behavior of mixed minerals, a series of grading tests were carried out in a spiral classifier using a mixture of magnetite and quartz. Magnetite and quartz mixed mineral samples using magnetic separation. Particle size analysis was performed using a combination of sieve method and Microtrac laser particle size analyzer. The results show that the actual efficiency curve of the mixed ore is similar to the shape of the actual efficiency curve of the single mineral. The actual efficiency curve of the mixed ore can be obtained by superposing the actual efficiency curve of the single mineral. The conversion efficiency curve of the mixed ore, like the conversion efficiency curve of a single mineral, is a “S” shaped curve that does not change with the operating conditions within a certain range. The corrected separation particle size of a single mineral can be calculated from the corrected separation particle size of the mixed mineral.