CAJ | 학술논문

宣龙式鲕状赤铁矿石铁品位较高,达48．65%,主要铁矿物为赤铁矿,占总铁的85．84%,其次是碳酸铁,占总铁的9．50%,磁性铁含量较低,仅占总铁的3．12%；脉石矿物主要为石英,磷、铝等有害元素含量均不高。为探索该资源的高效、低耗开发利用方案,采用磁化焙烧—弱磁选工艺进行了选矿试验研究。结果表明,0．2~0 mm的烟煤与-0．074 mm占62%的试样按质量比12%混合,在800℃下焙烧45 min,焙烧产物磨至-0．074 mm占89．2%的情况下进行弱磁选(磁场强度为105．6 kA/m ),可得到铁品位为62．50%、铁回收率为85．50%的铁精矿。因此,磁化焙烧—弱磁选工艺适合处理宣龙式鲕状赤铁矿石。
선룡식이상적철광석철품위교고,체48．65%,주요철광물위적철광,점총철적85．84%,기차시탄산철,점총철적9．50%,자성철함량교저,부점총철적3．12%；맥석광물주요위석영,린、려등유해원소함량균불고。위탐색해자원적고효、저모개발이용방안,채용자화배소—약자선공예진행료선광시험연구。결과표명,0．2~0 mm적연매여-0．074 mm점62%적시양안질량비12%혼합,재800℃하배소45 min,배소산물마지-0．074 mm점89．2%적정황하진행약자선(자장강도위105．6 kA/m ),가득도철품위위62．50%、철회수솔위85．50%적철정광。인차,자화배소—약자선공예괄합처리선룡식이상적철광석。
The iron grade of Xuanlong-type Oolitic hematite ore is up to 48. 65%. Main iron mineral is hematite,account-ing for 85. 84% of the total iron,followed by iron carbonate,representing 9. 50%. The content of magnetic iron is low,only 3. 12%. Gangue minerals are quartz with trace of harmful elements,phosphorus,aluminum,etc. . In order to explore efficient, low-consumption development and utilization of the resources,the process of magnetic roasting-low intensity magnetic separa-tion was selected. The results showed that the mass ratio of sample with 0. 2 ~ 0 mm bituminous coal and-0. 074 mm accoun-ted for 62% as 12%,roasted at 800 ℃ for 45 min,ground the roasted products to 89. 2% -0. 074 mm,and through the process of low intensity magnetic separation (magnetic field intensity 105. 6 kA/m),iron concentrate with iron grade of 62. 50% and recovery of 85. 50% was obtained. Therefore,the process of magnetic roasting-low intensity magnetic separation is the suitable process to deal with Xuanlong-type oolitic hematite.