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金属矿山 ›› 2007, Vol. 37 ›› Issue (12): 53-56.

• 矿物工程 • 上一篇    下一篇

舞钢市某磁选精矿提质降杂选矿试验研究

张永,胡义明   

  1. 中钢集团马鞍山矿山研究院
  • 出版日期:2007-12-15 发布日期:2012-02-07

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

Zhang Yong,Hu Yiming   

  1. SinoSteel Maanshan Institute of Mining Research
  • Online:2007-12-15 Published:2012-02-07

摘要: 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%、SiO2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。

关键词: 磁选精矿, 提质降杂, 细筛分级, 再磨, 弱磁选

Abstract: 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.

Key words: Concentrate of magnetic separation, Quality improvement and impurity reduction, Classification by fine screening, Regrinding, Low intensity magnetic separation