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金属矿山 ›› 2018, Vol. 47 ›› Issue (01): 84-87.

• 矿物工程 • 上一篇    下一篇

钙镁离子对细粒赤铁矿絮凝行为的影响

曾睿1,2,张芹1,2,苟宝1,2,潘登1,2,李炼1,2   

  1. 1.武汉科技大学资源与环境工程学院,湖北 武汉 430081;2.冶金矿产资源高效利用与造块湖北省重点实验室,湖北 武汉 430081
  • 出版日期:2018-01-15 发布日期:2018-03-13
  • 基金资助:

    基金项目:国家自然科学基金项目(编号:50974099)。

Effects of Calcium and Magnesium Ions on Flocculation Behavior of Fine Hematite

Zeng Rui1,2,Zhang Qin1,2,Gou Bao1,2,Pan Deng1,2,Li Lian1,2   

  1. 1.School of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;2.Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources,Wuhan 430081,China
  • Online:2018-01-15 Published:2018-03-13

摘要: 为了了解Ca2+、Mg2+对细粒赤铁矿絮凝行为的影响,以巴西某细粒赤铁矿石为研究对象,分别考察了用Na2CO3和NaOH调节矿浆pH的情况下,Ca2+、Mg2+对细粒赤铁矿絮凝行为的影响。结果表明:矿浆中Ca2+、Mg2+均能促进细粒赤铁矿的絮凝,随着Ca2+、Mg2+浓度的增大,促进效果增强。pH调整剂为Na2CO3时,随着矿浆pH升高,未达硬水浓度的Ca2+对细粒赤铁矿絮凝行为的促进效果均增强,而Mg2+对细粒赤铁矿絮凝行为的促进作用先增强后减弱;pH调整剂为NaOH时,随着矿浆pH升高,Ca2+、Mg2+对细粒赤铁矿絮凝行为的促进作用逐渐增强。矿浆中添加Ca2+与添加Mg2+相比,同等水硬度下,Ca2+对细粒赤铁矿絮凝行为的促进作用优于Mg2+。相同试验条件下,使用NaOH作pH调整剂时的细粒赤铁矿絮凝效果强于使用Na2CO3作pH调整剂时。

关键词: 钙镁离子, 细粒赤铁矿, 絮凝, 沉降率

Abstract: In order to understand the effect of Ca2+ and Mg2+ on the flocculation behavior of fine hematite,with a grained hematite ore in Brazil as the object,the effects of Ca2+ and Mg2+ on flocculation of grained hematite were investigated by adjusting the pH value of the pulp by Na2CO3 and NaOH.The results showed that Ca2+ and Mg2+ contenting in the pulp promoted the flocculation of fine hematite.With the increase of Ca2+ and Mg2+ concentration,the effect is enhanced.When the pH regulator is Na2CO3,the promoting effect of Ca2+ below the concentration of hard water on the flocculation behavior of fine hematite is enhanced with the increase of pulp pH,and the promoting effect of Mg2+ on the flocculation behavior of fine hematite is enhanced and then weakened.When the pH regulator is NaOH,the effect of Ca2+ and Mg2+ on the flocculation behavior of fine hematite was gradually enhanced with the increase of pH value.The effect of Ca2+ on the flocculation behavior of fine hematite is better than that of Mg2+ under the same hardness of water.Under the same experimental conditions,the flocculation effect of fine hematite with NaOH as a regulator is stronger than that with Na2CO3 as a regulator.

Key words: Calcium and magnesium ions, Fine hematite, Flocculation, Sedimentation rate