The ALC-1500L sand mill produced by Zhejiang Ailingchuang Mining Technology Co., Ltd. was successfully put into operation on January 21, 2019 at the Duobaoshan Copper Mine beneficiation plant.
Conduct coarse concentrate regrinding experiments in the laboratory, using ball mills and sand mills as regrinding equipment; Under the same process flow and flotation conditions, a copper concentrate containing 30.68% Cu, 10.24% SiO2, and 1.96% Al2O3 can be obtained through the closed circuit test of the Ai sand mill; The closed circuit test of the ball mill can obtain copper concentrate containing 27.02% Cu, 14.32% SiO2, and 5.27% Al2O3. The test indicators of the sand mill are better than those of the ball mill. The SiO2 content in copper concentrate during the industrial production of coarse concentrate regrinding from Aisha Mill is less than 11%, which meets the sales requirements of the owner.
Zhejiang Ailingchuang Mining Technology Co., Ltd. is committed to the research and development of Aisha grinding machines, providing fine and ultra-fine grinding equipment for domestic and foreign ore dressing plants, which can achieve narrow particle grinding, effectively improve the quality of concentrate products, and reduce losses caused by overgrinding.
Duobaoshan Copper Mine is a large-scale copper mine under Zijin Mining Group, with an annual processing capacity of nearly 10 million tons of ore. The use of Ai sand mill at Duobaoshan Copper Mine is the second large-scale Ai sand mill after the successful operation of Zijin Mining Russia's Longxing Lead Zinc Mine, opening up broad prospects for the application of Ai sand mill in non-ferrous gold beneficiation plants.

*The above particle size corresponds to P80

The comprehensive benefit reaches 20 million yuan/year, and the investment cost will be recovered in about 7 months.