CAJ | 학술논문

对某铁尾矿用煤粉作还原剂进行了还原焙烧试验研究。通过对尾矿中铁的物相分析表明，褐铁矿是矿石中主要的有用矿物，其在矿石中含量为67.8%。主要研究了还原剂加入量、焙烧温度和焙烧时间对尾矿中铁的金属化率的影响。结果表明，以煤粉为还原剂通过还原焙烧可以获得金属铁，在煤粉添加量15%、还原焙烧温度1200℃、还原焙烧时间60 min的条件下，铁的金属化率可以达到94%以上，经过一段磁选可以得到铁品位88.90%、铁回收率93.14%的铁精矿。96.22%的铅和95.19%的锌在焙烧过程中以烟尘的形式挥发，可以在烟尘中进一步综合回收。
대모철미광용매분작환원제진행료환원배소시험연구。통과대미광중철적물상분석표명，갈철광시광석중주요적유용광물，기재광석중함량위67.8%。주요연구료환원제가입량、배소온도화배소시간대미광중철적금속화솔적영향。결과표명，이매분위환원제통과환원배소가이획득금속철，재매분첨가량15%、환원배소온도1200℃、환원배소시간60 min적조건하，철적금속화솔가이체도94%이상，경과일단자선가이득도철품위88.90%、철회수솔93.14%적철정광。96.22%적연화95.19%적자재배소과정중이연진적형식휘발，가이재연진중진일보종합회수。
In this paper, the reduction roasting research on an iron tailings using coal dust as re-duction agent was conducted. The iron in the tailings existed mainly as limonite through phase anal-ysis of ferric compounds, and the content of limonite in the ore is 67. 80%. The effect of quantity of coal addition, roasting temperature and roasting time on the iron metallization ratio were studied. The experimental results showed that the metallic iron could be obtained through reduction roasting with coal as a reduction agent. The beset reduction roasting conditions are the addition of coal being 15%, the reduction temperature 1 200℃ and reduction time 60 min. In these conditions, the iron metallization ratio is higher than 94%. The iron concentrates with iron content 88 . 90% at a recov-ery rate of 93. 14% could be obtained though one step magnetic separation. 96. 22% of Pb and 95. 19% of Zn were volatized in the form of smoke during roasting, and could be comprehensive re-covered in further treatment.