Sustainable Mining and Metallurgy

The shelling hammer works in a strong magnetic field and high temperature environment. Due to the corrosion of molten salt electrolyte and the impact wear of the hard shell surface of the discharge port, the shelling hammer is gradually consumed. The impurities such as iron and cadmium enter the original aluminum liquid and affect the original aluminum grade of the electrolytic cell. In this paper, the experimental research and development of special aluminum-based shell hammer were carried out. The wear resistance, heat resistance and corrosion resistance of aluminum-based shell hammer samples are studied, and the performance combination suitable for shelling operation was found out. The test data show that the high temperature strength, hardness, wear resistance and corrosion resistance of aluminum alloy hammer can meet the requirements of field use. The practical application results show that the iron content in the original aluminum liquid of the electrolytic cell is reduced by 0.0178% after using the aluminum-based hammer. The aluminum-based hammer fundamentally solves the problem of primary aluminum pollution caused by the consumption and wear of the iron shelling hammer. If it is promoted on the 250000t/a series of electrolytic cells, the annual cost savings and the benefits brought by the improvement of aluminum quality can reach 1.32 million yuan, and the economic benefits are good.