以云南某锌厂提供的复杂挥发窑渣为研究对象,在理论分析的基础上,采用H_2O_2-H_2SO_4水溶液体系常压条件下协同浸出其中的有价金属。以In、Cu及Zn浸出率为考察指标,探讨了H_2O_2用量、硫酸浓度、反应温度、反应时间、液固比等因素对In...以云南某锌厂提供的复杂挥发窑渣为研究对象,在理论分析的基础上,采用H_2O_2-H_2SO_4水溶液体系常压条件下协同浸出其中的有价金属。以In、Cu及Zn浸出率为考察指标,探讨了H_2O_2用量、硫酸浓度、反应温度、反应时间、液固比等因素对In、Cu、Zn浸出率的影响。结果表明,在H_2O_2(30%)用量0.6 m L/g、硫酸浓度3 mol/L、反应温度80℃、反应时间2 h、液固比6∶1条件下,In浸出率93.92%、Cu浸出率89.84%、Zn浸出率66.49%。浸出渣中贵金属Ag含量大于0.01%,富集比3.23,初步实现了窑渣中有价金属的分离与综合利用。展开更多
The removal of boron impurity from metallurgical-grade silicon for solar cell application in slag system of CaO-SiO_2 is investigated.The experiments are conducted in an electromagnetic induction furnace which is used...The removal of boron impurity from metallurgical-grade silicon for solar cell application in slag system of CaO-SiO_2 is investigated.The experiments are conducted in an electromagnetic induction furnace which is used to heat. The distribution coefficient of boron(L_B)between slag and silicon phase is particularly examined in terms of the optical basicity of slag.With the increase of optical basicity,L_B increases to a local maximum value of 1.58 when the optical basicity is 0.71 after getting to the minimum value of 0.72 when the optical basicity is 0.56.In that above optical basicity of 0.71,L_B decrease sharply which indicates that increasing the basicity of slag is not always effective in boron removal from silicon.展开更多
Silicon carbide architecture with different morphology has been synthesized via catalyst-free carbothermic reduction of silica under normal atmosphere pressure.X-ray powder diffraction(XRD)and Scanning electron micros...Silicon carbide architecture with different morphology has been synthesized via catalyst-free carbothermic reduction of silica under normal atmosphere pressure.X-ray powder diffraction(XRD)and Scanning electron microscopy(SEM)were used to characterize the architecture.The results show that the mole ratio of carbon/silica has a great influence on the morphology of silicon carbide architecture.At different carbon/silica mole ratio,platelet-,bamboo-, pagoda-,and bead-like silicon carbide architecture have been synthesized.展开更多
文摘以云南某锌厂提供的复杂挥发窑渣为研究对象,在理论分析的基础上,采用H_2O_2-H_2SO_4水溶液体系常压条件下协同浸出其中的有价金属。以In、Cu及Zn浸出率为考察指标,探讨了H_2O_2用量、硫酸浓度、反应温度、反应时间、液固比等因素对In、Cu、Zn浸出率的影响。结果表明,在H_2O_2(30%)用量0.6 m L/g、硫酸浓度3 mol/L、反应温度80℃、反应时间2 h、液固比6∶1条件下,In浸出率93.92%、Cu浸出率89.84%、Zn浸出率66.49%。浸出渣中贵金属Ag含量大于0.01%,富集比3.23,初步实现了窑渣中有价金属的分离与综合利用。
基金Item Sponsored by the National Natural Science Foundation of China[u1137601,51104080]
文摘The removal of boron impurity from metallurgical-grade silicon for solar cell application in slag system of CaO-SiO_2 is investigated.The experiments are conducted in an electromagnetic induction furnace which is used to heat. The distribution coefficient of boron(L_B)between slag and silicon phase is particularly examined in terms of the optical basicity of slag.With the increase of optical basicity,L_B increases to a local maximum value of 1.58 when the optical basicity is 0.71 after getting to the minimum value of 0.72 when the optical basicity is 0.56.In that above optical basicity of 0.71,L_B decrease sharply which indicates that increasing the basicity of slag is not always effective in boron removal from silicon.
基金Items Sponsored by the National Natural Science Foundation of China (U1137601)
文摘Silicon carbide architecture with different morphology has been synthesized via catalyst-free carbothermic reduction of silica under normal atmosphere pressure.X-ray powder diffraction(XRD)and Scanning electron microscopy(SEM)were used to characterize the architecture.The results show that the mole ratio of carbon/silica has a great influence on the morphology of silicon carbide architecture.At different carbon/silica mole ratio,platelet-,bamboo-, pagoda-,and bead-like silicon carbide architecture have been synthesized.
