Method for adding hydrogen fluoride to keep fluorine balance of aluminum electrolysis system

• Main Authors: JIAO WENSHUAI, LI KEFU, YANG BAOXIN, LI RUYONG, JIAO ZHANZHONG, JIAO WEI, ZHAO GANG, GU GUIZHI, GUO LIANGYI, ZHANG FENGBING, HAN JILEI
• Format: Patent
• Language: Chinese; English
• Published: 06.11.2018
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS

The invention relates to a method for adding hydrogen fluoride to keep fluorine balance of an aluminum electrolysis system and belongs to the technical field of non-ferrous alloy. The method for adding hydrogen fluoride to keep the fluorine balance of the aluminum electrolysis system comprises the steps that firstly, hydrogen fluoride gas is mixed with aluminum electrolysis smoke, then mixed gas performs gas-solid contact fusion with metallurgical grade alumina for aluminum electrolysis, the gas-solid separation is performed, and finally solid obtained through separation is returned to the aluminum electrolysis system. The method is scientific and reasonable in design and simple and convenient to operate, keeps the fluorine balance of the aluminum electrolysis system and excellent performance of electrolyte, saves energy, is environmentally friendly and has remarkable economic benefit, and the production cost is reduced. 本发明涉及种铝电解系统添加氟化氢保持氟平衡的方法，属于有色冶金技术领域。本发明铝电解系统添加氟化氢保持氟平衡的方法，是先将氟化氢气体与铝电解烟气混合，再将混合后的气体与铝电解用冶