Abstract:

The concent ration works with the capacity of 500t/ d reduction and 250 t/ d floation is built in Hetai gold mine of Guandong Gaoyao when it comes into production. When expanding Gaocun and Yunxi mining region , the floation plant of 500 t/ d is built , where the capacity of floation is over the capacity of reduction. The reduction system was reconst ructed technically in 1999 , adopting the steps as reducing sieve pore size , making the ore outlet smaller , enlarging the screen analyses area , adding the working time. It meet s the demand of 750 t/ d production capacity without adding any equipment.

Key words: concet ration works, reduction systern, technical reconst ruct, more reduction and less milling