Method for removing mercury in process of acid making with lead-zinc smelting flue gas

• Main Authors: DONG JIASONG, SHEN ZONGQING, YU JUNXUE, MIAO ZHONGHE, HUANG XIAOYANG, ZHANG XIAOXIU
• Format: Patent
• Language: Chinese; English
• Published: 27.03.2018
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention relates to a method for removing mercury in the process of acid making with lead-zinc smelting flue gas, belonging to the technical field of flue gas treatment. Efficient mercury removalin the process of acid making is realized by adding a complexing agent I at the primary power wave, adding a complexing agent II to a gas-phase pipeline from an intermediate washing tower to a secondary power wave, and adding the complexing agent I at a secondary power wave; finally, mercury content in sulfuric acid in the dry absorption section is lower than 0.002%, the mercury content in finished product acid after standing is lower than 0.001%, and the requirement of superior product of industrial sulfuric acid is achieved; furthermore, the mercury removing method is steady in mercury removing efficiency, simple in mercury removal process, strong in adaptability, and favorable for transformation of existing devices, and addition of new equipment is not needed. 本发明涉及种铅锌冶炼烟气制酸过程中除汞的方法，属于烟气处理技术领域，通过在铅锌冶炼烟气制酸工艺中的级