某磁铁矿选矿工艺试验研究  

Experimental Study on Beneficiation Process of a Magnetite Ore

作　　者：唐双华[1] 纪振明 蒋权[1] 仇晓军 王冠群 李文娟 TANG Shuanghua;JI Zhenming;JIANG Quan;QIU Xiaojun;WANG Guanqun;LI Wenjuan(Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,China;Qingdao Bangtuo New Material Technology Co.,Ltd.,Qingdao 266409,China;Lianyungang Hengxintong Mining Co.,Ltd.,Lianyungang 222066,China;Xiamen Duitai New Material Technology Co.,Ltd.,Xiamen 361015,China)

机构地区：[1]中冶长天国际工程有限责任公司,湖南长沙410205 [2]青岛邦拓新材料科技有限公司,山东青岛266409 [3]连云港恒鑫通矿业有限公司,江苏连云港222066 [4]厦门兑泰新材料科技有限公司,福建厦门361015

出　　处：《矿业工程》2024年第5期36-42,共7页Mining Engineering

基　　金：国家重点研发计划资助项目(编号:2021YFC2902305)。

摘　　要：对某磁铁矿进行工艺矿物学研究,查明了矿石的矿物组成、化学组成、嵌布特征等。结果表明:该磁铁矿主要元素为TFe、Si、Ca、Al、Mg、K、Na等,矿石中主要回收元素TFe含量为43.82%,杂质元素Si含量为11.53%,Ca含量为5.65%,Mg含量为2.01%,有害元素S含量为2.36%,P元素为0.04%;该矿石中主要含铁矿物为磁铁矿和黄铁矿。脉石矿物主要为透辉石、黑云母、钙长石和铁橄榄石;次要矿物为方解石、钾长石、绿泥石、普通辉石、钙铁橄榄石、硅灰石、黄铜矿、磁黄铁矿、白钨矿等;磁铁矿为主要的目的矿物,绝大多数属于单体解离形式,一小部分磁铁矿内部包裹无定形的透辉石,另一部分磁铁矿与钙长石相互连生,少量磁铁矿与透辉石呈相互共生关系。针对该矿石特点,采用“一段阶段磨矿—粗选—二段阶段磨矿—二次精选”的工艺流程,可获得弱磁铁精矿产率56.27%,TFe品位68.43%,mFe品位67.31%,TFe回收率91.41%,mFe回收率98.51%的精矿产品指标;总尾矿产率43.73%,TFe品位8.56%,TFe分布率8.86%的抛尾指标。该工艺流程对该磁铁矿具有一定的适应性,能得到良好的选矿指标,具有较好的应用和推广前景。A process mineralogical study is carried out on a magnetite ore to identify the mineral composition,chemical composition and embedding characteristics of the ore.The results reveal that:The main elements of this magnetite ore are TFe,Si,Ca,Al,Mg,K,Na,etc.The main recovered element in the ore is TFe with a content of 43.82%,and the impurity elements are Si with a content of 11.53%,Ca with a content of 5.65%,Mg with a content of 2.01%,and the harmful elements are S with a content of 2.36%,and P with a content of 0.04%.The primary iron-bearing minerals in this ore are magnetite and pyrite.The main vein minerals are diopside,black mica,anorthite and fayalite;the minor minerals are calcite,potassium feldspar,chlorite,augite,kirschsteinite,wollastonite,chalcopyrite,pyrrhotite,scheelite,etc.Magnetite is the primary target mineral,most of which is in the form of monomer dissociation.A small portion of magnetite encloses amorphous diopside,another portion of magnetite coexists with anorthite,and a minor amount of magnetite is symbiotic with diopside.Based on the characteristics of this ore,the process of"one-stage grinding-roughing-two-stage grinding-two-stage cleaning"is adopted and the concentrate product indexes with a weak magnetic concentrate yield rate of 56.27%,a TFe grade of 68.43%,a mFe grade of 67.31%,a TFe recovery rate of 91.41%,and a mFe recovery of 98.51%and tailings indexes of a total tailings rate of 43.73%,a TFe grade of 8.56%and a TFe distribution rate of 8.86%can be obtained.The process has certain adaptability to this magnetite ore,can obtain good beneficiation indexes,and has good application and promotion prospects.

关 键 词：磁铁矿 工艺矿物学 浮选 磁选 磨矿 

分 类 号：TD923[矿业工程—选矿]