Method for working up auriferous and cupriferous arsenical pyrites

摘要

In working up auriferous and cupriferous arsenical pyrites or such pyrites in admixture with sulphur pyrites, a part of the ore is roasted and smelted to matte which is blasted in a converter, whilst the remainder of the ore, after roasting, is charged direct into the converter to be blasted together with the matte. By this procedure, loss of gold in the converter slag is minimized. Roasting of the ore to be passed direct to the converter is so controlled that all arsenic is roasted out whilst leaving the bulk of the sulphur, and so that any iron present remains in the divalent state; such ore should, when possible, have a higher gold and a lower copper content than that part of the ore which is smelted to matte.ALSO:In working up auriferous and cupriferous arsenical pyrites or such pyrites in admixture with sulphur pyrites, a part of the ore is roasted and smelted to matte which is blasted in a converter, whilst the remainder of the ore, after roasting, is charged direct into the converter to be blasted together with the matte. By this procedure, loss of gold in the converter slag is minimized. Roasting of the ore to be passed direct to the converter is so controlled that all arsenic is roasted out whilst leaving the bulk of the sulphur, and that any iron present remains in the divalent state; such ore should, when possible, have a higher gold and a lower copper content than that part of the ore which is smelted to matte.