金属矿山
金屬礦山
금속광산
METAL MINE
2015年
2期
53-57
,共5页
微细粒嵌布赤铁矿%阶段磨矿%磁选%磁种%选择性絮凝脱泥%反浮选
微細粒嵌佈赤鐵礦%階段磨礦%磁選%磁種%選擇性絮凝脫泥%反浮選
미세립감포적철광%계단마광%자선%자충%선택성서응탈니%반부선
Micro-fine disseminated hematite%Stage grinding%Magnetic separation%Magnetic seeds%Selective flocculation desliming%Reverse flotation
湖南某铁矿石中铁矿物以磁铁矿为主，赤铁矿次之，并有12.12%的铁以硅酸盐矿物形式存在。其中磁铁矿属中细粒嵌布，但赤铁矿具典型极微细粒嵌布特征，分选难度极大。根据矿石性质，采用阶段磨矿—弱磁选—强磁选—选择性絮凝脱泥—反浮选工艺进行选矿试验，即第1步在-0.075 mm占65.87%的较粗磨矿细度下通过弱磁选选出磁铁矿，第2步通过强磁选抛尾富集弱磁选尾矿中的赤铁矿，第3步对强磁选精矿进行2段阶段细磨(一段磨至-0.038 mm占96.56%，二段磨至-0.019 mm占98.93%)、4段加磁种的选择性絮凝脱泥(以所得磁铁矿精矿为磁种，与强磁选精矿一起细磨)，第4步对脱泥沉砂进行1粗1精4扫反浮选，最终获得了产率为32.33%、铁品位为63.55%、铁回收率为71.34%的综合铁精矿，从而为该矿石的合理开发利用提供了技术支撑。
湖南某鐵礦石中鐵礦物以磁鐵礦為主，赤鐵礦次之，併有12.12%的鐵以硅痠鹽礦物形式存在。其中磁鐵礦屬中細粒嵌佈，但赤鐵礦具典型極微細粒嵌佈特徵，分選難度極大。根據礦石性質，採用階段磨礦—弱磁選—彊磁選—選擇性絮凝脫泥—反浮選工藝進行選礦試驗，即第1步在-0.075 mm佔65.87%的較粗磨礦細度下通過弱磁選選齣磁鐵礦，第2步通過彊磁選拋尾富集弱磁選尾礦中的赤鐵礦，第3步對彊磁選精礦進行2段階段細磨(一段磨至-0.038 mm佔96.56%，二段磨至-0.019 mm佔98.93%)、4段加磁種的選擇性絮凝脫泥(以所得磁鐵礦精礦為磁種，與彊磁選精礦一起細磨)，第4步對脫泥沉砂進行1粗1精4掃反浮選，最終穫得瞭產率為32.33%、鐵品位為63.55%、鐵迴收率為71.34%的綜閤鐵精礦，從而為該礦石的閤理開髮利用提供瞭技術支撐。
호남모철광석중철광물이자철광위주，적철광차지，병유12.12%적철이규산염광물형식존재。기중자철광속중세립감포，단적철광구전형겁미세립감포특정，분선난도겁대。근거광석성질，채용계단마광—약자선—강자선—선택성서응탈니—반부선공예진행선광시험，즉제1보재-0.075 mm점65.87%적교조마광세도하통과약자선선출자철광，제2보통과강자선포미부집약자선미광중적적철광，제3보대강자선정광진행2단계단세마(일단마지-0.038 mm점96.56%，이단마지-0.019 mm점98.93%)、4단가자충적선택성서응탈니(이소득자철광정광위자충，여강자선정광일기세마)，제4보대탈니침사진행1조1정4소반부선，최종획득료산솔위32.33%、철품위위63.55%、철회수솔위71.34%적종합철정광，종이위해광석적합리개발이용제공료기술지탱。
Iron minerals of an iron ore from Hunan are mainly magnetite and secondly hematite,and 12. 12% of the iron exists in the form of silicate minerals. Among these,magnetite is middle or fine disseminated and hematite is disseminated in extremely microgranular. It is hard to achieve good separation index. According to the ore property,the process of stage grind-ing-low intensity magnetic separation(LIMS)-high intensity magnetic separation(HIMS)-selective flocculation desliming-re-verse flotation was conducted. First,magnetite was concentrated through LIMS at coarse grinding fineness of 65. 87% passing 0. 075 mm. Second,hematite was enriched from tailings of LIMS by HIMS to discard gangue minerals. Third,two stage grinding ( primary grinding at 0. 038 mm accounted for 96. 56%,second grinding at 98. 93% passing 0. 019 mm) and four stage selec-tive flocculation desliming operation were adopted to deal with HIMS concentrate. Forth,reverse flotation of one roughing-one cleaning-four scavenging operation on underflow from desliming were made. Mixed iron concentrate with yield rate of 32. 33%, iron grade of 63. 55% and recovery of 71. 34% was obtained,which provide technical basis for rational development and utili-zation of the ore.
