CAJ | 학술논문

中国地质科学院矿产综合利用研究所与东北大学联合研制了连续悬浮焙烧炉,为检验某应用于鲕状赤铁矿石开发的可能性,采用该炉进行悬浮磁化焙烧—弱磁选选矿试验。结果表明,-0．3 mm的某鲕状赤铁矿石在焙烧温度为575℃,还原气体CO的体积分数为90%( N2的体积分数为10%)、总流量为6 m3/h的情况下以100 kg/h的给矿速度连续悬浮焙烧,焙烧产物磨至-0．074 mm占90%后用?400×300型筒式弱磁选机1次弱磁选(磁场强度为120 kA/m),获得的精矿铁品位为56．22%、铁回收率为88．84%。悬浮焙烧过程的特点及弱磁选精矿指标表明,连续悬浮焙烧炉可实现鲕状赤铁矿石的高效、低耗开发利用。
중국지질과학원광산종합이용연구소여동북대학연합연제료련속현부배소로,위검험모응용우이상적철광석개발적가능성,채용해로진행현부자화배소—약자선선광시험。결과표명,-0．3 mm적모이상적철광석재배소온도위575℃,환원기체CO적체적분수위90%( N2적체적분수위10%)、총류량위6 m3/h적정황하이100 kg/h적급광속도련속현부배소,배소산물마지-0．074 mm점90%후용?400×300형통식약자선궤1차약자선(자장강도위120 kA/m),획득적정광철품위위56．22%、철회수솔위88．84%。현부배소과정적특점급약자선정광지표표명,련속현부배소로가실현이상적철광석적고효、저모개발이용。
To test the possibility of develop oolitic hematite ore utilization using continuous suspension roaster developed by Institute of the Multipurpose Utilization of Mineral Resource and Northeastern University,suspension magnetic roasting-low intensity magnetic separation was conducted. The results showed that the -0. 3 mm oolitic hematite ore was roasted at the con-ditions of temperature 575℃,CO volume concentration 90%( N2 volume concentration 10%) ,and total gas flow 6 m3/h,feed-ing rate of 100 kg/h and roasted products ground to-0. 074 mm 90%,and then beneficiated by low intensity magnetic separa-tion on ?400×300 low intensity magnetic separator at the field intensity of 120 kA/m,concentrate with iron grade 56. 22% and recovery 88. 84% was obtained. The features of the suspension roasting and the index of the concentrate affirm continuous sus-pension roaster can realize high efficiency and low consumption utilization of oolitic hematite ore.