舞钢市某磁选精矿提质降杂选矿试验研究

Beneficiation Test Research on Quality Improvement of Certain Magnetic Separation Concentrate from Wugang City

河南舞钢市某矿业公司选矿厂磁选精矿铁品位较低,为63.50%左右,而二氧化硅含量高达10%,左右。为提高产品质量,对该磁选精矿进行了多种选别工艺的提质降杂实验室小型试验。根据小型试验结果,采用细筛分级、筛上再磨弱磁选流程进行扩大连续试验,获得了产率为91.94%、铁品位为68.20%、SiO_2含量为3.44%、铁回收率为97.81%的精矿产品,达到了精矿铁品位>68%的目标,试验结果可作为选矿厂生产流程优化改造的技术依据。

The iron concentrate of magnetic separation of a mining company＇s concentrator in Wugang City, Henan, has a low iron grade of about 63.5% while high silica content of about 10%. In order to improve the product quality, laboratory tests on several beneficiation processes for this magnetic separation concentrate were carried out. Based on this, pilot test using a process of fine screening, regrinding and low intensity magnetic separation of the oversize fraction of screening was made. As a result, an iron concentrate with a yield of 91.94% , iron grade of 68.20% , SiO2 content of 3.44% and iron recovery of 97.81% was obtained, attaining the goal of making the concentrate grade above 68%. The test results can be used as the technical basis for the transformation for optimizing the production process of the concentrator.