某微细粒级混磁精矿载体浮选试验研究
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摘要
微细粒矿石由于其比表面积大、表面能高、体积及质量小等特征导致浮选过程颗粒之间发生非选择性团聚现象,进而会恶化浮选环境,使常规泡沫浮选难以获得良好指标。针对东鞍山烧结厂重磁车间产品进行了载体浮选试验研究,其中重精筛下产品作为载体矿物,混磁精矿为黏附矿物。试验结果表明:在粗选NaOH调pH值11.50、浮选温度35.0℃、CaO用量700 g/t、淀粉用量1 200 g/t、TD-Ⅱ用量500 g/t,精选TD-Ⅱ用量250 g/t条件下,经过1粗1精3扫反浮选闭路流程后,与常规浮选相较,载体浮选指标得到了改善,精矿TFe品位提高了1.12个百分点。对其产品粒度分析表明:载体浮选精矿产品中-20μm粒级含量显著降低,累计体积曲线峰呈现出向粗粒级移动的趋势,并且强度下降,载体浮选矿物表观粒度增加,优化了浮选环境。
Due to its large specific surface area,high surface energy,small volume and small mass,the fine-grained ore causes non-selective agglomeration among particles,which deteriorates the flotation environment and makes it difficult to obtain favourable indicators for conventional froth flotation. For East Anshan Sintering Plant the carrier flotation test study on Magnetic Plant samples,including gravity concentrate fine undersize as carrier minerals,mixed magnetic concentrate as ad?hesion minerals,the experimental results show that the pH value of 11.50,the flotation temperature of 35.0 ℃,CaO dosage of 700 g/t,starch dosage of 1 200 g/t,TD-Ⅱdosage of 500 g/t,and TD-Ⅱdosage of 250 g/t for cleaning,after the reverse flo?tation closed process of one roughing,one cleaning,three scavenging,the carrier flotation index was improved compared with the conventional flotation significantly,and the concentrate grade increment was improved by 1.12 percentage points.The particle size analysis of the product showed that the content of-20 μm in the carrier flotation concentrate product was re?duced significantly,the cumulative volume curve peak showed a tendency to move to the coarse grain level,and the strength decreased,the apparent particle size of the mineral increased,and the flotation environment was optimized.
Due to its large specific surface area,high surface energy,small volume and small mass,the fine-grained ore causes non-selective agglomeration among particles,which deteriorates the flotation environment and makes it difficult to obtain favourable indicators for conventional froth flotation. For East Anshan Sintering Plant the carrier flotation test study on Magnetic Plant samples,including gravity concentrate fine undersize as carrier minerals,mixed magnetic concentrate as ad?hesion minerals,the experimental results show that the pH value of 11.50,the flotation temperature of 35.0 ℃,CaO dosage of 700 g/t,starch dosage of 1 200 g/t,TD-Ⅱdosage of 500 g/t,and TD-Ⅱdosage of 250 g/t for cleaning,after the reverse flo?tation closed process of one roughing,one cleaning,three scavenging,the carrier flotation index was improved compared with the conventional flotation significantly,and the concentrate grade increment was improved by 1.12 percentage points.The particle size analysis of the product showed that the content of-20 μm in the carrier flotation concentrate product was re?duced significantly,the cumulative volume curve peak showed a tendency to move to the coarse grain level,and the strength decreased,the apparent particle size of the mineral increased,and the flotation environment was optimized.
引文
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[4]陈军,闵凡飞,王辉.微细粒矿物疏水聚团的研究现状及进展[J].矿物学报,2014(2):181-188.Chen Jun,Min Fanfei,Wang Hui.Research status and progress of hydrophobic agglomeration of fine minerals[J].Actamineralogica Sinica,2014(2):181-188.
[5]刘青,王恩文,李宪荣.微细粒矿物载体浮选的研究进展[J].轻工科技,2015(8):106-107.Liu Qing,Wang Enwen,Li Xianrong.Research progress on the flotation of fine mineral carrier[J].Light Industry Science and Technology,2015(8):106-107.
[6]蔡振波,徐会华.微细粒矿物选矿技术研究现状及展望[J].现代矿业,2015(11):74-76.Cai Zhenbo,Xu Huihua.Research status and prospect of fine mineral processing technology[J].Modern Mining,2015(11):74-76.
[7]葛英勇,侯静涛,余俊.微细粒矿物浮选技术进展[J].金属矿山,2010(12):90-94.Ge Yingyong,Hou Jingtao,Yu Jun.Progress in fine mineral flotation technology[J].Metal Mine,2010(12):90-94.
[8]朱阳戈,张国范,冯其明,等.微细粒钛铁矿的自载体浮选[J].中国有色金属学报,2009(3):554-560.Zhu Yangge,Zhang Guofan,Feng Qiming,et al.Self-carrier flotation of fine ilmenite[J].Chinese Journal of Nonferrous Metals,2009(3):554-560.
[9]严伟平.微细粒锡石的载体浮选工艺研究[D].赣州:江西理工大学,2012.Yan Weiping.Research on Carrier Flotation Technology of Fine Cassiterite[D].Ganzhou:Jiangxi University of Science and Technology,2012.
[10]董宏军,陈正学.微细粒钛铁矿载体浮选的研究[J].矿冶工程,1992(2):35-37.Dong Hongjun,Chen Zhengxue.Research on floatation of fine ilmenite carrier[J].Metallurgical Engineering,1992(2):35-37.
[11]朱阳戈.微细粒钛铁矿浮选理论与技术研究[D].长沙:中南大学,2011.Zhu Yangge.Research on Floatation Theory and Technology of Fine Ilmenite[D].Changsha:Central South University,2011.
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