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金属矿山 ›› 2015, Vol. 44 ›› Issue (03): 187-190.

• 综合利用 • 上一篇    下一篇

浮—磁联合工艺从高炉瓦斯灰中回收焦炭

付刚华1,王洪阳1,郭宇峰1,李鹏飞1,杨露1,周企逵2   

  1. 1.中南大学资源加工与生物工程学院,湖南 长沙 410083;2.宝钢集团韶钢松山股份技术中心,广东 韶关 512123
  • 出版日期:2015-03-15 发布日期:2015-07-31
  • 基金资助:

    * 国家重点基础研究发展计划(973计划)项目(编号:2014CB643400)。

Recovery of Coke from Blast Furnace Dust by Combined Process of Flotation and Magnetic Separation

Fu Ganghua1,Wang Hongyang1,Guo Yufeng1,Li Pengfei1,Yang Lu1,Zhou Qikui2   

  1. 1.School of Mineral Processing and Bioengineering,Central South University,Changsha 410083,China;2.Songshan Company Technology Center of Shaoguan Iron & Steel Co.,Ltd,Baosteel Group,Shaoguan 512123,China
  • Online:2015-03-15 Published:2015-07-31

摘要: 为了高效回收利用高炉瓦斯灰中的焦炭,采用浮—磁联合工艺对某钢铁公司锌含量为4.43%、碳含量为18.45%的高炉瓦斯灰进行了焦炭回收试验。结果表明:①在煤油用量为800 g/t、松醇油为200 g/t、水玻璃为1 500 g/t情况下,1次浮选可以获得碳品位为74.96%、回收率为90.83%、锌含量为1.91%、铁含量为5.19%的浮选精矿;②以磁铁矿为载体,浮选精矿在磨矿细度为-0.074 mm占74.32%、背景磁感应强度为1.5 T的条件下进行强磁选,可获得碳品位为85.17%、回收率达86.29%(对原矿)的焦炭精矿,其锌含量进一步降低为1.29%。该焦炭精矿品质满足返回烧结配矿利用要求。

关键词: 高炉瓦斯灰, 焦炭精矿, 锌, 浮选, 磁选

Abstract: In order to high effectively recover and utilize the coke existed in blast furnace dust (BFD),combined process of flotation and magnetic separation was used to treat a BFD containing 4.43% Zn and 18.45% C.The results show that:①With kerosene dosage of 800 g/t,terpenic oil dosage of 200 g/t and sodium silicate dosage of 1 500 g/t,rough coke concentrate with 74.96% C,1.91% Zn,5.19% Fe and carbon recovery of 90.83% was obtained;②Treating magnetite as carrier,coke concentrate with carbon grade of 85.17% and total recovery of 86.29% can be obtained by grinding the flotation concentrate to 74.32% passing 0.074 mm,and then enduring high intensity magnetic separation with 1.5 T background induction intensity,further more the zinc grade in coke concentrate was reduced to 1.29%.The quality of coke concentrate can meet the requirements of matching ore in sintering.

Key words: Blast furnace dust, Coke concentrate, Zinc, Flotation, Magnetic separation