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Flotation performances of polymorphic pyrrhotite 总被引:1,自引:0,他引:1
The floatability of different crystalline structures of pyrrhotite (monoclinic and hexagonal) was studied. It is shown that
the floatability of monoclinic and hexagonal has obvious difference, and that the flotation recovery of monoclinic pyrrhotite
is larger than that of hexagonal pyrrhotite using different collectors. When butyl dithiophosphate is used as the collector,
the recovery is larger than that by sodium butyl xanthate and sodium diethyl dithiocarbamate. At the pH values ranging from
6 to 9, monoclinic pyrrhotite can be floated well, and the flotation recovery is higher than 90%. Monoclinic and hexagonal
pyrrhotites are more easily activated by Cu2+ in acidic conditions than in alkaline conditions. But Cu2+ cannot activate hexagonal pyrrhotite using sodium diethyldithiocarbamate as the collector. By the measurement of contact
angle, it is indicated that monoclinic and hexagonal pyrrhotites float well and are easily activated by Cu2+ when dithiophosphate is used as the collector. Using sodium diethyl dithiocarbamate as a collector, the relationship between
potential and pH range for pyrrhotite flotation is established. At pH 5, the optimal potential range for flotation of monoclinic
pyrrhotite is about 125–580 mV (vs SHE), with the maximum flotation occurring at about 350 mV (vs SHE); the optimal potential
range for flotation of hexagonal pyrrhotite is 200–580 mV (vs SHE), with the maximum flotation occurring at about 300 mV (vs
SHE). 相似文献
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为高效开发利用云南某硫化锑矿,在原矿工艺矿物学研究的基础上,对其进行了详细选矿试验研究。结果表明:矿石中主要有价元素锑品位为2.16%,锑主要以硫化物的形式存在,氧化率仅为4.15%;锑矿物主要为辉锑矿,硫化物主要为黄铁矿,脉石矿物以石英、绢云母和方解石为主;辉锑矿的嵌布粒度较粗,主要分布在0.02~2.56mm粒级,磨矿细度-0.074 mm占74.56%时锑矿物的单体解离度大于90%。基于矿石性质研究结果,在磨矿细度-0.074 mm占74.56%的条件下,以六偏磷酸钠为分散剂、硝酸铅为活化剂、M7为捕收剂、松醇油为起泡剂,采用“1粗3精2扫”的闭路浮选流程,可获得锑品位为35.30%、锑回收率为93.52%的锑精矿。研究结果可为矿山后续中深部硫化矿石的选别及现有流程的优化提供有益参考。 相似文献
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Improvement of flotation behavior of Mengzi lead-silver-zinc ore by pulp potential control flotation 总被引:1,自引:0,他引:1
The electrochemical behavior of Mengzi lead-silver-zinc ore flotation system was studied. Based on the electrochemical characteristics of sulfide mineral flotation system, a stage potential control flotation was developed with the main parameters of pulp potential(φp), pH value and collector dosage. Using N,N' diphenylamino-dithiolphosphoric acid(NNDDC) as a collector, which has good selectivity for galena flotation at pH 8.8 and pulp potential 330 mV, DDTC is used as secondary collector to improve both the grade and recovery of Pb and Ag. The pulp potential values significantly influence the floatability of practical minerals and single minerals when using NNDDC as the collector. The flotation recovery of galena reaches 85% at about 0.3 V and pH8.8. With the usage of pulp potential control during grinding and flotation, the new pulp electrochemical technology for Mengzi lead-silver-zinc ore flotation was developed. The results show that the grades of Pb and Ag of galena concentrate are 55% and 1 800 g/t, respectively, while the recoveries of Pb and Ag are 86.5% and 65%, respectively, the grade of Zn of marmatite concentrate is 42.5%, and the recovery of Zn is 91.25%. 相似文献
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一种新型有机抑制剂甘油基黄原酸钠对硫化矿抑制作用机理研究 总被引:2,自引:0,他引:2
设计并合成了一种可以抑制硫化矿的小分子有机抑制剂甘油基黄原酸钠,通过浮选试验考察了该抑制剂对硫化矿物的浮选抑制行为。结果表明,用丁黄药作捕收剂,在甘油基黄原酸钠存在下铁闪锌矿能被Cu^2+活化从而具有良好的可浮性,而黄铁矿不能被Cu^2+活化,从而实现两种矿物的选择性分离。通过动电位分析表明,甘油基黄原酸钠在有Cu^2+存在条件下不能阻止丁黄药的阴离子在铁闪锌矿表面的吸附,但能阻止丁黄药的阴离子在黄铁矿表面的吸附,与浮选结果一致。 相似文献
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研究抑制剂甘油基黄原酸钠(SGX)在铁闪锌矿与黄铁矿浮选分离过程中的作用机理。通过浮选实验考察该抑制剂对硫化矿物的浮选抑制行为。结果表明,用丁黄药作捕收剂,在SGX存在下铁闪锌矿能被Cu2+活化从而具有良好的可浮性,而黄铁矿不能被Cu2+活化;在pH为4-11的范围,SGX的用量小于50mg/L时,可以实现两种矿物的选择性分离。动电位分析表明,SGX在Cu2+存在的条件下不能阻止丁黄药的阴离子在铁闪锌矿表面的吸附,但能阻止丁黄药的阴离子在黄铁矿表面的吸附。吸附等温测试结果表明,SGX在黄铁矿表面的吸附量远比在铁闪锌表面量大。 相似文献