Experimental study on the disposal of neutral dreg slurry by back-filling process in Suichang gold mine

A large amount of neutral dreg slurry were produced because of dealing with the acidic wastewater in Suichang gold mine,and these slurries pose a threat to environment and the safety of tailings dam.In order to solve the problem of neutral dreg slurry disposal,the feasibility of utilizing the neutral dreg slurry in the back-filling process is studied.The study results show whatever the neutral dreg slurry is used for dilution water or filling water,the concentration of the neutral dreg slurry should be less than 4%,and all neutral dreg slurries can be utilized when the neutral dreg slurry is used for filling water.