浮-磁联合工艺从高炉瓦斯灰中回收焦炭  

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

作　　者：付刚华[1] 王洪阳[1] 郭宇峰[1] 李鹏飞[1] 杨露[1] 周企逵 

机构地区：[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　　处：《金属矿山》2015年第3期187-190,共4页Metal Mine

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

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 500g/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。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.

关 键 词：高炉瓦斯灰 焦炭精矿 锌 浮选 磁选 

分 类 号：TD923.7[矿业工程—选矿] TD924.1