Industrial Residues Of The Zinc Smelting Of Lead, Zinc, Copper, Cadmium Extraction Process

The mine's resource consumpted is high, but secondary utilization of the mine's resource is low in annealed zinc industry ,so that lots of resource which can be used became the polluter in our environment. So it is of obvious economic and social values to the recovery' and synthetic application of the elements such as lead ,zinc ,copper and cadmium on annealed zinc sediment.Through the deep study on the annealed zinc sediment of shaoguan ,we probing the refine course of zinc sediment with physical and chemical ways respectively, with the separation and refine on zinc sediment such as washing , watery grinding ,filter and floatation and so on , over 91 percent of zinc and over 30 percent of sulfuric lead are obtained .dealing with the lead sediment by despositing and converting ,acetic soluting .zinc piece displacement and so on ,which is derived from the copper and cadmium sediment by drenching with sulfuric acid .over 92 percent of lead is obtained; through the displacement of iron flour ,cadmium flour or just prepared sponge cadmium to the acid drenched solution of copper and cadmium sediment ,high purity sponge copper is obtained ;through neutralizing ,oxidizing ,hydrate ex-iron ,over 90 percent of sponge cadmium is obtained by displacement with sheet zinc ,the filtered solution can be prepared for ZnSO4 7H2O ,of which the purity can come to the industrial demand of quality class.The technicals is not found through searches by GuangDong science and technology information gruduate school in our country. The main studied content and results is as follows :1. The copper and cadmium sediment are obtained by studing on the optimal drenchingconditions such as the particle's size of copper and cadmium sediment ,the drenching time ,the acid's concentration and the temperature and so on.2. Take use of the sediment containing the lead from the acidized copper and cadmiumsediment to hydro- metallurgic produce the lead acetate and lead, technicals and conditions of hydro-metallurgic distilling the Lead from the sediment containing the Lead are obtained , and the technocal of converting the lead sulfate to lead acetate.3. Though the physical separation and extraction of the coarse zinc from the annealedzinc sediment such as watery grinding .washing and filter .over 91 percent of zinc particle is obtained4. Filtered solution after watery grinding ,washing and filtering can be converted intothe industrial production such as ZnCl2.5. After watery grinding on sediment containing the lead from the acided copper and cadmium sediment ,over 30 percent of sulfuric lead can be floated out ,and the recover}' of lead can surpass 96 percent.6. Studying on the recovery of copper from the annealed zinc sediment ,the optimal technocal course and conditions are obtained ,and the high purity of sponge copper is made .7. Study on the ingredient of solution which is from the acided copper and cadmium sediment after extracting the copper ,the methods of bring down the acidity and adjusting PH and accelerating hydrate ex-iron with the neutralized reagents ,and the selection and the amount of the oxidized reagents are obtained .8. Study on the extraction technocal course of cadmium from the annealed zinc sediment and conditions and effect of the reagents to the cadmium's displacement ,the optimal technocal conditions are obtained .9. Though purifying and removing Cu, Cd, Pb on the acided copper and cadmium sediment ,the solution can be used to produce ZnSO4 7H2O,of which the quality can come to HG/2326-92 chemical industrial demand of quality class I .