The flotation behavior and adsorption mechanism of novel（1-hydroxy-2-methyl-2-octenyl） phosphonic acid（HEPA） to cassiterite were investigated by micro-flotation tests, zeta potential measurements, FTIR determinati...The flotation behavior and adsorption mechanism of novel（1-hydroxy-2-methyl-2-octenyl） phosphonic acid（HEPA） to cassiterite were investigated by micro-flotation tests, zeta potential measurements, FTIR determination and density functional theory（DFT） calculation. The flotation results demonstrated that HEPA exhibited superior collecting performance compared with styrene phosphonic acid（SPA）. The cassiterite recovery maintained above 90% over a wide pH range of 2-9 with 50 mg/L HEPA. The results of zeta potential measurement and FTIR detection indicated that the adsorption of HEPA onto cassiterite was mainly attributed to the chemisorption between HEPA monoanions and Sn species on mineral surfaces. The DFT calculation results demonstrated that HEPA monoanions owned higher HOMO energy and exhibited a better affinity to cassiterite than SPA, which provided very clear evidence for the stronger collecting power of HEPA presented in floatation test and zeta potential measurement.展开更多
应用耐低温捕收剂BK425对某高镁胶磷矿进行了反浮选降镁试验研究,并与常规捕收剂进行了对比。在其他条件一定的情况下,考察了磨矿细度、硫酸用量、BK425用量、温度对降镁效果的影响。试验结果表明:BK425反浮选降镁的浮选性能最佳且受温...应用耐低温捕收剂BK425对某高镁胶磷矿进行了反浮选降镁试验研究,并与常规捕收剂进行了对比。在其他条件一定的情况下,考察了磨矿细度、硫酸用量、BK425用量、温度对降镁效果的影响。试验结果表明:BK425反浮选降镁的浮选性能最佳且受温度影响较小,是一种应用前景广阔的捕收剂。在磨矿细度为-0.074 mm 70%、BK425用量为600 g/t、硫酸作为调整剂的酸性条件下,经过1次粗选、1次精选和1次扫选的闭路浮选流程,可获得P2O5品位为28.76%、MgO品位为1.17%,P2O5回收率为91.78%的磷精矿。展开更多
基金Project(2013AA064102)supported by the 12th Five-year Plan of National Scientific and Technological Program of China
文摘The flotation behavior and adsorption mechanism of novel（1-hydroxy-2-methyl-2-octenyl） phosphonic acid（HEPA） to cassiterite were investigated by micro-flotation tests, zeta potential measurements, FTIR determination and density functional theory（DFT） calculation. The flotation results demonstrated that HEPA exhibited superior collecting performance compared with styrene phosphonic acid（SPA）. The cassiterite recovery maintained above 90% over a wide pH range of 2-9 with 50 mg/L HEPA. The results of zeta potential measurement and FTIR detection indicated that the adsorption of HEPA onto cassiterite was mainly attributed to the chemisorption between HEPA monoanions and Sn species on mineral surfaces. The DFT calculation results demonstrated that HEPA monoanions owned higher HOMO energy and exhibited a better affinity to cassiterite than SPA, which provided very clear evidence for the stronger collecting power of HEPA presented in floatation test and zeta potential measurement.
文摘应用耐低温捕收剂BK425对某高镁胶磷矿进行了反浮选降镁试验研究,并与常规捕收剂进行了对比。在其他条件一定的情况下,考察了磨矿细度、硫酸用量、BK425用量、温度对降镁效果的影响。试验结果表明:BK425反浮选降镁的浮选性能最佳且受温度影响较小,是一种应用前景广阔的捕收剂。在磨矿细度为-0.074 mm 70%、BK425用量为600 g/t、硫酸作为调整剂的酸性条件下,经过1次粗选、1次精选和1次扫选的闭路浮选流程,可获得P2O5品位为28.76%、MgO品位为1.17%,P2O5回收率为91.78%的磷精矿。
