With the development of such kind gold ores, the arsenic pollution is Increasingly critical and especially the control of arsenic-bearing waste waxer only leaves us a blank.

In general, the recovery of gold in arsenian gold ores usually is made by use of flotation cyanide leaching or flotation roasting cyanide leaching technological process.

Nitrate process is a new technology to pretreat refractory arsenical ores, and has made considerable progress in the process development.