湖北某高磷鲕状赤铁矿磁化焙烧-磁选-反浮选试验研究

STUDY ON MAGNETIZING ROASTING-MAGNETIC SEPARATION-REVERSE FLOTATION OF A HIGH-PHOSPHORUS OOLITIC HEMATITE ORE IN HUBEI

湖北某地高磷鲕状赤铁矿主要铁矿物为赤褐铁矿,有害杂质磷、硅、铝含量高,难以获得有效利用。针对此原矿铁品位为46.31%,磷含量为1.25%的高磷鲕状赤铁矿进行了磁化焙烧及磨选工艺技术条件试验研究。试验确定了磁化焙烧—磁选,一次粗选、一次扫选反浮选工艺,在磨矿细度-0.074mm含量占75%、配煤量11%、焙烧温度800℃、焙烧时间30min的条件下可获得铁品位57.17%、回收率82.74%、磷含量1.12%的磁选铁精矿产品。磁选精矿采用一次粗选、一次扫选反浮选工艺提铁降磷,通过该工艺分选后,可获得TFe品位60.53%、回收率70.22%、磷含量0.32%的铁精矿产品。

The technology of magnetic roasting and separation for a high-phosphorus oolitic hematite ore with an iron grade of 46.31% , phosphorus content of 1.25% in Hubei was studied, which is mainly red limonite with high content of harmful impurities phosphorus, silicon, aluminum, it is difficult to attain a effective utilization. The test results show that an iron concentrate with an iron grade of 57.17% , recovery of 82.74% and phosphorus content of 1.12% can be obtained under the conditions of grinding fineness 75% passing 0. 074 mm, coal powder content 11% , roast temperature 800 ℃ , roast time 30 min. The rough iron concentrate was treated by reverse flotation to enrich iron and reduce phosphorus, Through the separation process, an iron concentrate with an iron grade of 60.53% , recovery of 70.22% and phosphorus content of 0.32% can be obtained.