The calcined matter is raked out, and lixiviated with water.
The whole is then lixiviated and decomposed by carbonate of potash.
When most of the copper has been converted into the sulphate, the ore is lixiviated.
If prepared by ignition, the semifused mass is lixiviated with water, and then evaporated to dryness.
It is raked out, and when cooled, lixiviated in great iron ...