2/体系浸取金的条件控制 c(Lyc(I 2Au+13+→2AuL2 1.5 Aul HAuo 固液比 S ac c(r)≈102 mol/L Aul Au 1/10<c(2c(I)<1/2 0.5 1/10<v(s)v()<1/5 6810121416 pH=7-11 Figure 2. Eh-pH diagram for the gold-iodide system for [Au= 10-M and [ 10 M(recreated from [43342 2Cu2++5I→2CuI+I 313+6OH→1O3+8I+3H2O 图1Au-体系的电势ph图(c(Au)=105mo, c()=10-2 mol/L)!]I2 /I-体系浸取金的条件控制 2Au + I3 - +I- → 2AuI2 - ↑ ↑ ↑ s aq aq 固液比 ↓ ↓ c(I2 )/c(I- ) c(I- ) ≈ 10-2 mol/L 1/10 < c(I2 )/c(I- ) < 1/2 1/10 < v(s)/v(l) < 1/5 pH = 7-11 2Cu2+ + 5I- → 2CuI + I3 - 3I3 - + 6OH- → IO3 - + 8I- + 3H2O 图1 Au-I -体系的电势-pH图 (c(Au) = 10-5 mol/L, c(I- ) = 10-2 mol/L)[4]