Study On The Technology Process Of Comprehensive Recovery And Utilization In Refractory Gold Ores

Refractory gold ores share 30 percent of the gold reserves deposited in our country.One of the character of which is that it contains some useful components, and most of the components are copper, iron, zinc etc.However,in our country, most of the medium and small mines only reclaim gold, silver metal and they do nothing with the copper, iron, zinc metal elements that accompany with gold. These metals pile up in the environment which is either a waste of resources or a environmental pollution. So it is inevitable and necessary to comprehensive recycled the refractory gold ore.On the basis of this tenet,This thesis mainly introduses the separation of multi- metal in refractory gold ores, the production of accessional products.By these, the utilization rate of resource has been increased, the economic benefit has been improved and it provides technique support for the sustainable development of our country.This article focus on studying the lixivium.,Which contains copper,iron,zinc etc,and the pH of the solution is 2～3.To this system, the paper includes three aspects as following.Utilizing the heat of roasting can decrease the cost,so the technology process of removing of iron had been studied first.Considering the character of the solution and the economic benefit, we adopted the method of jarosite prosess and ferric hydroxid to remove the iron.Then, discussed the technology process about the separation of copper and zinc in feed. The concentration of copper and zinc is low, so the method of ion-exchange had been adopted. D-407 and D-405 resin had been chosen to reseach the separation of copper and zinc. First,studied the conditions of adsorption and desorption when the resin effected on the copper or zinc solution single.Second,discussed the affect from chloride ion to adsorption. Last, d etermined the technology process about the separation of copper and zinc. Finally I choosed the way of selective desorption to separate copper and zinc, and it was effective.In the end, I took the way of evaporation to produce CuSO4 and ZnSO4 using the solution had been separated , and got gradeⅠCuSO4 and grade II ZnSO4.By way of experiment, finished the separation and comprehensive recovery of copper and zinc from the leaching solution of refractory gold ores, opened up a new idea to recycle the refractory gold ores, improved the economic benefit of business, meanwhile, avioded the pollution from heavy metal in cinder, it is of great practical significance in solving the shortage of metal resources in our country.