Abstract:

The basic principles of the bio-oxidation of refractory gold-bearing concent rate in oxidation-box in static state are int roduced. Through 187 days’bio-oxidation , the test-samples, the gold leaching rate came f rom 37.04 %(before bio-oxidation) to 93.01 %(after bio-oxidation),and this result got a same level as the tank bio-oxidation (93.68 %). The economic analysis shows that a small scale gold mine take this technics to process the ref ratory gold2bearing concent rate,the cost and capital will only be 1P3 and 1P2 respectively of a same scale tank bio2oxidation plant,and the favorable practicability are forecasted to this technics.

Key words: refratory gold2bearing concent rate, oxidation2box, static state, bio-oxidation