Investigation of parameters affecting on direct lead leachingFrom Gole Zard mine

lead and zinc mine of Gole zard is located in ALigudarz city of Lorestan province and the grade of galena and sphalerite minerals in this sulfide ore is 5.4% and 23.7%, respectively. Research has shown that lead in ores is complexed by chlorine ions. For this purpose direct lead leaching was performed on the ore of this mine by mixing hydrochloric acid and NaCl solution and the effect of each of the parameters of temperature, time, pulp density, stirring and hydrochloric acid concentration on lead leaching was investigated. The results showed that the parameters of hydrochloric acid concentration, pulp density and time had the most effect and pulp stirring time and temperature had the least effect on lead recovery and finally under optimal conditions of 60 minutes, temperature 50 ° C, pulp density 10%, hydrochloric acid concentration 15% and the stirring speed 1000 rpm, the lead recovery was obtained about 91.7%.