A research on the wolframite resource utilization of mining waste rock in the Yaogangxian Mine,Hunan,China
The wolframite ore in the Yaogangxian Mine of Hunan Province has been mined and processed for a long time.A large amount of mining waste rock,which has been produced in the mining process for nearly 100 years,caused not only a waste of resources,but also the environmental risk.In this paper,we have carried out a systematic research on the comprehensive utilization of wolframite resource in the mining waste rock of the Yaogangxian Mine.The mining waste rock was crushed to make sand by using a two-stage one-close circuit sand making process,Three kinds of coarse aggregates with sand sizes of-31.5 mm+20 mm,-20 mm+10 mm,-10 mm+5 mm and a kind of fine aggregate with size of-5 mm+1 mm have been obtained.Their physical and chemical properties can meet the technical requirements of all kinds of sand and stone aggregates in the national standard.The-1 mm sized secondary fine mud produced in the sand making process has been processed by using the combined process of strong magnetic roughing and shaking table concentration.The tungsten concentrate with WO3 grade of 55.75％at recovery rate of 58.39％has been obtained.The application of this technique for processing the mining waste rock has basically achieved the wolframite resource utilization and the comprehensive recovery of valuable metals from the mining waste rock.
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