大山选矿厂一段磨矿分级旋流器优化研究

为提高大山选矿厂一段常规磨矿分级指标,对旋流器结构参数进行了优化分析,选择配置有螺旋下旋线式进料管、三段锥锥体及加长柱体结构的新型旋流器进行了现场试验,并在优化溢流管及沉砂嘴直径的基础上取得了较理想的分级指标。旋流器溢流中+0.18 mm粒级含量下降至7.10%,-0.074 mm粒级含量增加至65.39%,分级效率提高到59.78%,与现场旋流器指标(溢流+0.18 mm粒级含量≥8.00%、-0.074 mm粒级含量61%～63%、分级效率50%)比显著提高。

Optimization of the Hydrocyclones in First Stage Grinding and Classification System in Dashan Concentration Plant

In order to improve the index of conventional grinding and classification system in Dashan concentration plant,optimization and analysis on structural parameters of the hydrocyclone were carried out. A new type of hydrocyclone with the structure of helical downward line feed pipe, three-section cone and lengthened cylinder was selected for field test. On the basis of optimizing the diameters of overflow and underflow, a satisfactory classification result was obtained. The fraction over 0.18 mm in overflow is down to 7.10% and the fraction below 0.074 mm in overflow is increased to 65.39%, moreover, the classification efficiency is increased to 59.78%, which is significantly better than the current classification index (the fraction over 0.18 mm in overflow is more than 8.00%, the fraction below 0.074 mm in overflow is 61% to 63% and the classification efficiency is 50%).