Experimental Study Of Liangshan Bronze Copper Slag Election

With the rapid development of economy in our country, the people’s demand for mineral resources is also increasing. But due to the constant mining of the mineral resources, the contradiction is more and more prominent between resource poor and demand increasing. As copper smelting power country, a large number of copper slag output in our country each year. The slag containing large amounts of valuable metals is a kind of important secondary resources. By studying and high efficient recycling, not only can extract a lot of valuable elements, create a good economic benefit, but also can reduce pollution, to reduce the consumption of resources at a time.The research object is bronze slag of Sichuan liangshan in this experiment. The content of copper in the ore is0.93%, mainly exists in the form of secondary copper sulfide, and iron content is23.75%, mainly in the form of fayalite exist. The content of acidic gangue mineral SiO2is41.78%and the total content of alkaline gangue mineral CaO, Al2O3and MgO is10.96%. Elemental carbon content is higher and the harmful element As content is low.In the explore experiment study it is not ideal to using the flotation process and washing method for decarburization in advance, and eventually determines the ore grinding directly-Multiple roughing copper.The condition experiment was studied on the basis of explore experiment, through analysis and comparison test results, ultimately determined:the optimum grinding fineness for0.074is75.42%, the optimum reagent systems of roughing1:the reagent dosage of800g/t Na2CO3,1000g/t sodium silicate,150g/t Y89,30g/t terpilenol, flotation time of17min; the optimum reagent systems for roughing2:the reagent dosage of200g/t Y89,20g/t terpilenol, flotation time of13min; the optimum reagent systems for roughing3:the reagent dosage of1000g/t sodium sulfide,100g/t ethylenediamine phosphate,200g/t Y89,20g/t terpilenol, flotation time of10min. After a number of cleaning and scavenging determined experiments, determined three-stage roughing, three-stage cleaning and two-stage scavenging as the principle of the process, and carried out under the condition of the whole flow of open.By compared and analysis the results of three closed-circuit processes, finally it is recommended to use the first kind of closed-circuit process, that is combining middling produced by cleaning1and scavenging1,2and returning to roughing1homework, the middling produced by cleaning2and cleaning3was returned in turn to a job on the test process. A copper concentrate can be obtained rate was3.66%, Cu grade was15.69%, the recovery was61.72%.