Technological condition in slurry electrolysis
of high-silver g alena concentrate
of high-silver g alena concentrate
(1.Faculty of Material and Metallurgy Engineering,
Kunming University of Science and Technology,
Kunming 650093, China；
2.Faculty of Science, Kunming University of Science and
Technology, Kunming 650093, China)
Kunming University of Science and Technology,
Kunming 650093, China；
2.Faculty of Science, Kunming University of Science and
Technology, Kunming 650093, China)
Abstract: Effects of various technological conditions such as ρ(Cl-), ρ(Fe)T , pH value and temperature on the cell voltage, lead leaching rate and the cathodic current efficiency of the slurry electrolysis of high-silver galena concentrate were studied, and the behavior regularity of lead and silver was investigat ed. As a result, the suitable condition was determined as: ρ(Cl-)230g/L, ρ(Fe)T15g/L, pH 1, temperature 70℃, electrolysis time 6h. Under such condition, adopting the cathodic current density of 150A/m2 and the liquid-solid ratio of 15∶1, lead powder with a purity degree of 91.18% was got. At the same time, leaching rate of lead, leaching rate of silver and cathodic current efficiency amounted to 96.88%, 70.88% and 75.68% respectively.
Key words: slurry electrolysis; technological condition; galena