Research on Making Fired Bricks with Gold Tailings

Yi Nan Gold tailings are well known as difficulty to make fired bricks due to their high content of calcium and low silicon-aluminum content. Based on the analysis of their basic properties, research has been taken on using them to make fired bricks by press forming. The results indicated that the optimum technology system was: forming pressure 15MPa, forming water content 8%~9%, water content before sintering 1%, sintering temperature 1050°C, holding time 60 minutes. By applying this treating methodology, the compressive strength of the brick with 75% fine tailings and 25% medium tailings can reach MU10.