Process research and engineering design of straight-grate for V-Ti magnetite ore
HU Changsong1,2, TIAN Lanxian1,2, ZHANG Daoyuan1,2, LI He1,2
1. Beijing Shougang International Engineering Technology Co.,Ltd., Beijing 100043, China; 2. Beijing Metallurgical 3D Simulation Design Engineering Technology Research Center, Beijing 100043, China
Abstract:Based on the project of Pansteel Xichang 3 million t/a V-Ti magnetite pellet for straight-grate, the roasting characteristics of V-Ti magnetite pellets were found through simulation test of V-Ti magnetite pellet for straight-grate. Combined with the advanced technology of straight-grate at home and abroad, some new ideas and new means of engineering design for V-Ti magnetite straight-grate were put forward, such as advanced material distribution technology, thick layer roasting technology, air distribution plate optimization technology, CFD flow field simulation technology, advanced combustion technology, flue gas oxygen content reduction technology, SO2 and NOx reduction technology, dry structure beam and air-cooling beam new technology and three-dimensional engineering design technology. Production practice shows that the monthly operating rate is 98.13%, the daily output is not less than 9 100 t, the mass fraction of FeO is 0.6%-1.5%, the average compressive strength is not less than 2 000 N/P, and the basicity is natural basicity in the production line of Pansteel Xichang V-Ti magnetite pellet for straight-grate. The emission indexes are that the content of smoke dust, SO2, NOx and reference oxygen volume fraction in the flue gas is 2.53 mg/m3, 3.15 mg/m3, 42.42 mg/m3 and 17.34%, respectively, which all meet the emission standards. This project is the first production line of V-Ti magnetite pellet for straight-grate in China, and the application prospect is broad.
胡长松, 田兰忺, 张道远, 李贺. 钒钛磁铁矿带式焙烧机工艺研究及工程设计[J]. 中国冶金, 2023, 33(11): 88-97.
HU Changsong, TIAN Lanxian, ZHANG Daoyuan, LI He. Process research and engineering design of straight-grate for V-Ti magnetite ore[J]. China Metallurgy, 2023, 33(11): 88-97.