Roasting - ChestofBooks
The purpose and effect of roasting ore for lixi-viation is, as to gold, to burn all base metals, sulphur, and other substances, such as arsenic, antimony, and tellurium, and either expel them by volatilization, or leave them in such condition as to be harmless in the chlorination of the gold, and, as to silver, to change its condition in the,Processing Gold In Antimony Ores - Odanah School,A two-stage roasting process, similar to that used for arsenic sulfide ores, can also volatilize antimony oxides and prevent adverse reactions such as the production of metallic antimony, which can coat the surface of gold particles (Nagy et al., 1966) or the formation of silver glasses in high-silver ores (Matsukawa and Sakai, 1956).Roasting of copper pyrite ores is for which of the,,Nov 22, 2019· Roasting of copper pyrite ores is for which of the following purpose? A.,antimony etc. and the to convert all the iron and copper to oxides. D. To melt arsenic and antimony sulphides etc. and remove them by liquation and to burn off sulphur partially to leave enough to combine with copper and iron.