In order to extend the service life of Shuikoushan Lead and /inc Mine, a laboratory study was performed on the feasibility of mining its No4 Gold Ore Body by leaching. The results show that leaching with sodium cyanide is feasible. Effects of the concentrations of sodium cyanide and oxidant, the rate of liquid to solid (L/w) on leaching results have been discussed. The leaching rate of gold was more than 90% . The technics parameters and co...