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贵州某硅钙(镁)质磷矿石双反浮选试验 预览

Study on Double Reverse Flotation of Silicon-Calcareous(Magnesium)Phosphate Ore from Guizhou
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摘要 贵州某高硅钙含镁低品位磷矿石中的主要磷矿物为胶磷矿,以氟磷灰石为主,部分为碳磷灰石;主要脉石矿物为石英、白云石、伊利石和黄铁矿等。矿石P2O5品位为26.19%,SiO2、CaO、MgO含量分别为16.88%、38.18%、1.92%。为确定矿石的开发利用工艺,采用双反浮选工艺进行了试验。结果表明,矿石在磨矿细度为-0.074mm占82.05%的情况下,采用优先反浮选脱镁-沉降脱泥-1粗2精、粗选及精选尾矿合并1次扫选后返回的反浮选脱硅流程处理,最终获得了P2O5品位为32.35%、P2O5回收率达82.36%、MgO与P2O5含量比为2.32%、R2O3与P2O5含量比为11.07%的磷精矿。反浮选脱硅前预先脱泥,并用醚多胺类捕收剂T609和消泡剂TOP搭配,可有效改善阳离子捕收剂反浮选脱硅过程中泡沫多、黏度大、难冲消的问题。双反浮选工艺有效实现了磷灰石与脉石矿物的分离,获得了酸法加工用磷矿石优等品质量标准的磷精矿。 The main phosphorus mineral of a low grade phosphate ore with high silicon and magnesium in Guizhou is collophanite which consisted mainly of fluoroapatite and partly of carbon-apatite. And the main gangue minerals are quartz,dolomite,illite and pyrite,etc. The grade of P2O5,SiO2,CaO and MgO is 26.19%,16.88%,38.18% and 1.92%,respectively. In order to determine the development and utilization process of ore,the experiment was carried out using double reverse flotation process. The results showed that under the grinding fineness of 82.05%-0.074 mm,with the process of preference reverse flotation to remove magnesium-sedimentation to remove slurry-reverse flotaion of one roughing two cleaning and tailings of roughing and first cleaning returned after mixed and via one scavenging of silicon remove process,the phosphorus concentrate with P2O5 grade of 32.35%,P2O5 recovery of 82.36%,MgO to P2O5 ratio of 2.32%,R2O3 to P2O5 ratio of 11.07% could be obtained. The bubbly,sticky and intractable foam in cationic reverse flotation process can be solved by desliming before desilication and the use of T609 combined with defoaming agent TOP. Double reverse flotation makes apatite separated from gangue mineral and acquires the concentrate which reaches the high-class standard of phosphate ore for the acidic process.
作者 杜橙幻 葛英勇 刘鸣 Du Chenghuan;Ge Yingyong;Liu Ming(College of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan 430070,China)
出处 《金属矿山》 CAS 北大核心 2019年第1期92-95,共4页 Metal Mine
基金 国家自然科学基金项目(编号:51574188).
关键词 磷矿石 双反浮选 脂肪酸 醚胺 过稳定泡沫 Phosphate ore Double reverse flotation Fatty acid Ether amine Over-stable froth
作者简介 杜橙幻(1995-),女,硕士研究生;通讯作者:葛英勇(1961-),男,教授,博士,博士研究生导师。
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