摘要
针对东鞍山烧结厂赤贫铁矿选矿过程中存在的流程复杂和铁精矿回收率低等问题,在矿石工艺矿物学研究基础上,提出采用"磨矿—弱磁—强磁—混磁精矿再磨—反浮选"短流程高效分选新技术开展试验研究。结果表明,在磨矿细度-0.074 mm占80%、弱磁选磁场强度80 k A/m、强磁粗选磁场强度480 k A/m、强磁扫选磁场强度640 k A/m的条件下得到混磁精矿;混磁精矿再磨细度为-0.038 mm占90%,然后在粗选矿浆pH=11.5、淀粉用量1 100g/t、CaO用量750 g/t、ks Ⅲ用量1 300 g/t,精选ks Ⅲ用量为650 g/t条件下进行反浮选,全流程扩大连续试验获得了精矿铁品位66.28%、回收率76.67%的技术指标。
In view of the problems such as low gravity concentration index,low recovery of iron concentrate and complex process in the beneficiation process of low-grade hematite in Donganshan sintering plant,based on the research of ore process mineralogy,the innovative technology of "grinding-low intensity magnetic and high intensity magnetic separation-regrinding-reverse flotation" was proposed to carry out systematic experimental research.The results show that the mixed magnetic concentrate can be obtained under the conditions of grinding fineness of-0.074 mm content of 80%,low intensity magnetic field strength of 80 kA/m,high intensity magnetic field strength of 480 kA/m for roughing magnetic separation,and high intensity magnetic field strength of 640 kA/m for sweeping magnetic separation. The suitable reverse flotation conditions of the mixed magnetic concentrate are grinding fineness of-0.038 mm content of 90%,pulp pH 11.5,starch dosage of 1 100 g/t,CaO dosage of 750 g/t,roughing collector ksⅢ dosage of 1 300 g/t,cleaning collector ksⅢ dosage of 650 g/t. The continuous test for complete flow were carried out,and the iron concentrate with iron grade of 66.28% and iron recovery of76.67% was obtained.
作者
杨光
马自飞
杨会利
袁立宾
孙永升
YANG Guang;MA Zifei;YANG Huili;YUAN Libin;SUN Yongsheng(Donganshan Sintering Plant,Ansteel Group Corporation,Anshan 114000,China;School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2021年第8期88-94,共7页
Metal Mine
关键词
东鞍山铁矿石
短流程
弱磁选
强磁选
反浮选
赤贫铁矿
Donganshan iron ore
short flowsheet
low intensity magnetic separation
high intensity magnetic separa⁃tion
reverse flotation
low-grade hematite
