This experimental research the effect of temperature and time of alkali leaching hot was studied using caustic soda (NaOH) and sodium sulfide (Na2S), on the extraction of As and the degree of concentration of Cu, Au and Ag concentrate enargita (Cu3AsS4) ", the ore is from the center of Peru (province of Yauli). The concentrate showed the following chemical analysis: 21.5% Cu, 5.8% As, 254.71 g / TM Ag, 2.55 g / TM Au, each test was conducted with dilution L / S of 10 to 1, with 20 grams and 200 ml of liquid (leaching solution) at a stirring speed of 750 rpm, constantly blowing air to a particle size 86% less than 400 mesh (38um); reagents used was caustic soda (NaOH) to 3.5 molar and sodium sulfide (Na2S) to 1.0 molar. A factorial design follows were evaluated at 3 levels and 2 replicates, the temperature was considered 70, 80 and 90 ° C; time was considered 2, 3 and 4 hours with a tota...