金属矿山
金屬礦山
금속광산
Metal Mine
2015年
11期
57-61
,共5页
低品位微细粒铁矿石%高效选矿工艺%阶段磨选
低品位微細粒鐵礦石%高效選礦工藝%階段磨選
저품위미세립철광석%고효선광공예%계단마선
Fine low-grade iron ore%High efficiency beneficiation process%Stages grinding-stages separation
国外某铁矿石铁品位为31．92%、SiO2含量为46．44%，矿石矿物嵌布粒度微细。为探索在较粗磨矿细度条件下获得高质量铁精矿的高效选矿工艺，对其进行了选矿流程试验。实验室试验结果表明：采用阶段磨矿—弱磁选—磁选柱分选工艺，当磨矿细度达到-0．043 mm占95%时，才能获得铁品位大于68%、硅含量小于5%的高质量铁精矿；而采用阶段磨矿—弱磁选—反浮选工艺，当磨矿细度放粗至-0．076 mm 占90%时，即可获得铁品位大于68%、硅含量小于5%的铁精矿，且可减少三段磨矿量45%以上。扩大连续试验结果表明，原矿经两段阶段磨矿(-0．076 mm占90%)—弱磁选—反浮选—反浮选尾矿脱水后再磨(-0．038 mm占95%)再选流程选别，可获得精矿铁品位68．12%、SiO2含量4．59%、铁回收率70．02%、磁性铁回收率96．83%的指标，实现了该矿石的高效分选。
國外某鐵礦石鐵品位為31．92%、SiO2含量為46．44%，礦石礦物嵌佈粒度微細。為探索在較粗磨礦細度條件下穫得高質量鐵精礦的高效選礦工藝，對其進行瞭選礦流程試驗。實驗室試驗結果錶明：採用階段磨礦—弱磁選—磁選柱分選工藝，噹磨礦細度達到-0．043 mm佔95%時，纔能穫得鐵品位大于68%、硅含量小于5%的高質量鐵精礦；而採用階段磨礦—弱磁選—反浮選工藝，噹磨礦細度放粗至-0．076 mm 佔90%時，即可穫得鐵品位大于68%、硅含量小于5%的鐵精礦，且可減少三段磨礦量45%以上。擴大連續試驗結果錶明，原礦經兩段階段磨礦(-0．076 mm佔90%)—弱磁選—反浮選—反浮選尾礦脫水後再磨(-0．038 mm佔95%)再選流程選彆，可穫得精礦鐵品位68．12%、SiO2含量4．59%、鐵迴收率70．02%、磁性鐵迴收率96．83%的指標，實現瞭該礦石的高效分選。
국외모철광석철품위위31．92%、SiO2함량위46．44%，광석광물감포립도미세。위탐색재교조마광세도조건하획득고질량철정광적고효선광공예，대기진행료선광류정시험。실험실시험결과표명：채용계단마광—약자선—자선주분선공예，당마광세도체도-0．043 mm점95%시，재능획득철품위대우68%、규함량소우5%적고질량철정광；이채용계단마광—약자선—반부선공예，당마광세도방조지-0．076 mm 점90%시，즉가획득철품위대우68%、규함량소우5%적철정광，차가감소삼단마광량45%이상。확대련속시험결과표명，원광경량단계단마광(-0．076 mm점90%)—약자선—반부선—반부선미광탈수후재마(-0．038 mm점95%)재선류정선별，가획득정광철품위68．12%、SiO2함량4．59%、철회수솔70．02%、자성철회수솔96．83%적지표，실현료해광석적고효분선。
There is an iron ore contains 31. 92% iron and 46. 44% SiO2 from abroad. Mineral dissemination of the ore is microfine. Beneficiation test was conducted in order to provide a high efficiency beneficiation process by which qualified iron concentrate can be obtained while in the coarser grinding conditions. The results of small-scale beneficiation test showed that i-ron concentrate with iron grade above 68% at the grinding fineness of 95% passing 0. 043 mm by adopting the process of stage grinding-LIMS-column separator separation,but iron concentrate with iron grade above 68% at the grinding fineness of 90%passing 0. 076 mm by adopting the process of stage grinding-LIMS-reverse flotation,moreover can reduce above 45% ore quan-tity for the third grinding. The results of the pilot-scale test showed that iron concentrate with iron grade of 68. 12%,content of 4. 59%,iron recovery of 70. 02%,magnetic iron recovery of 96. 83% can be obtained via two stages grinding(90% passing 0. 076 mm)-LIMS-reverse flotation-dehydration and regrinding(95% passing 0. 038 mm) for flotation tailings-LIMS-reverse flotation process. High efficient separation was achieved on the ore.
