1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, China 2. College of Engineering, Peking University, Beijing 100871, China 3. Ministry of Environmental Protection, Tianjin Iron and Steel Group Co.， Ltd.， Tianjin 300301, China
Abstract：In order to research the influence of high temperature molten metals in nonferrous metallurgical flue gas on the filtration performance and life of microporous ceramic tube, the wettability of molten metal bismuth on the microporous ceramic substrate is tested by using the sessile drop method. The structure and chemical component of the contact interface are analyzed by using metallographic microscopy, scanning electron microscopy and EDS. The composition and particle size of the flue gas and dust collected by the microporous ceramic tube of the dust removal system are also analyzed.The results show that the adhesion between the molten metal bismuth and the ceramic substrate is poor, and the bonding force is weak. It is easy to perform back flow cleaning and recover the valuable metal elements. The flue gas and dust collected in the actual production mainly contains Pb, As, Zn, Cu, Fe, Ca and other elements, and the Pb content is the highest. The particle size of flue gas and dust is small. After the stable production, the particle size range is reduced to 1- 30 μm, and the particles that are smaller than PM2.5, account for 8%- 12%.
2018, Vol. 28 
