China Nonferrous Metallurgy

Waste filter bag for electrolytic cell is an unavoidable typical waste in the electrolytic aluminium industry, and its disposal and utilization is the common challenge facing the industry. Currently, the research on waste filter bag disposal and utilization technology has been insufficient with a lack of thorough study on the key process parameters of pyrometallurgical process, which is unable to support the industrial demand for green and sustainable development. By analyzing phases and compositions of waste bag filter for electrolytic cells in different areas of China, this paper conducts a study on the disposal and utilization of waste bag filter by pyrometallurgical process and analyzes this process based on the test results. The results show that the disposal effect and economic benefit are the best, when the fiber loss on ignition is 95% after the waste bag filter is pyrometallurgically treated at 750℃ with the air supply volume of 6L/min. After the sintering process, the filter bag fiber of electrolytic aluminum enterprises can be reused as fuel, and the sintered dust, with a low carbon content, can be returned to the electrolytic cell.