A new process for extracting indium from indium-zinc concentrates was proposed.The process can directly extract indium from removed copper solution by D2EHPA,and cancel the stage of removing iron in the traditional pr...A new process for extracting indium from indium-zinc concentrates was proposed.The process can directly extract indium from removed copper solution by D2EHPA,and cancel the stage of removing iron in the traditional process because of using iron and part of zinc in the In-Zn concentrates for direct preparing high quality Mn-Zn soft magnetic ferrites.The technologies in the processes,such as leaching the neutral leached residues with high concentrated acid at high temperature,reduction ferric and removing copper,and extracting indium,were investigated.The results show that total recovery ratio of indium is increased from less than 70% in the traditional process to more than 95%.This process has the advantages of largely simplifying the procedure of indium extraction,zero draining off of iron residue and zero emitting of SO2.So this is a clean production process.展开更多
The treatment of cadmium dust with a two stage leaching process was investigated to replace the existing sulphation roast leaching processes. The process parameters in the first stage leaching were basically similar t...The treatment of cadmium dust with a two stage leaching process was investigated to replace the existing sulphation roast leaching processes. The process parameters in the first stage leaching were basically similar to the neutral leaching in zinc hydrometallurgy. The effects of process parameters in the second stage leaching on the extraction of zinc and cadmium were mainly studied. The experimental results indicated that zinc and cadmium could be efficiently recovered from the cadmium dust by two stage leaching process. The extraction percentages of zinc and cadmium in two stage leaching reached 95% and 88% respectively under the optimum conditions. The total extraction percentage of Zn and Cd reached 94%.展开更多
基金Project(2004AA649080) supported by the National Basic Research and Development Program of ChinaProjects(50234010,50444020) supported by the National Natural Science Foundation of China
文摘A new process for extracting indium from indium-zinc concentrates was proposed.The process can directly extract indium from removed copper solution by D2EHPA,and cancel the stage of removing iron in the traditional process because of using iron and part of zinc in the In-Zn concentrates for direct preparing high quality Mn-Zn soft magnetic ferrites.The technologies in the processes,such as leaching the neutral leached residues with high concentrated acid at high temperature,reduction ferric and removing copper,and extracting indium,were investigated.The results show that total recovery ratio of indium is increased from less than 70% in the traditional process to more than 95%.This process has the advantages of largely simplifying the procedure of indium extraction,zero draining off of iron residue and zero emitting of SO2.So this is a clean production process.
文摘The treatment of cadmium dust with a two stage leaching process was investigated to replace the existing sulphation roast leaching processes. The process parameters in the first stage leaching were basically similar to the neutral leaching in zinc hydrometallurgy. The effects of process parameters in the second stage leaching on the extraction of zinc and cadmium were mainly studied. The experimental results indicated that zinc and cadmium could be efficiently recovered from the cadmium dust by two stage leaching process. The extraction percentages of zinc and cadmium in two stage leaching reached 95% and 88% respectively under the optimum conditions. The total extraction percentage of Zn and Cd reached 94%.
