Theory and application on solid carbon direct reduction #br#
of zincbearing waste in steel plant
JIN Yonglong1，2，HE Zhijun1，ZHAN Wenlong1，PANG Qinghai1
(1. School of Material and Metallurgy， University of Science and Technology Liaoning， Anshan 114051，
Liaoning， China；2. Technology Research Institute， HBIS， Shijiazhuang 050023， Hebei， China)
Abstract： The amount of zinc dust in steel plants is huge，and it is rich in iron，carbon and other elements which is a secondary resource that can be recycled. Under the nonstandard condition，the reduction tendency of ZnO has an advantage to the one of FeO according to thermodynamic analyzed results. To this end，reduction experiments of the zinccontaining solid waste at different temperatures and times are designed under laboratory conditions. It is found that the dezincification rate can reach 90% when the reduction temperature is 1 423 K and the reduction time is more than 15 min，but the metallization rate of iron can close to 90% and required to under the condition of 1 573 K；when the reduction temperature is lower than 1 423 K，the reduction time has a greater impact on the dezincification rate；when the reduction temperature is higher than 1 473 K，the reduction temperature has little effect on the dezincification rate，and the dezincification rate can reach 95%. The reference value of temperature and time are benefit to choosing the optimized operation parameters of the main process to dispose the solid waste combined with ZnO，like as Rotary Kiln (RK) and Rotary Hearth Furnace (RHF). And it also benefits to reuse solid waste contained with ZnO when the more reasonable process with lower investment cost and lower running cost could be chosen.
金永龙，何志军，湛文龙，庞清海. 固体碳直接还原钢铁厂含锌固废的理论与实践[J]. 钢铁, 2019, 54(10): 111-116.
JIN Yonglong1，2，HE Zhijun1，ZHAN Wenlong1，PANG Qinghai1. Theory and application on solid carbon direct reduction #br#
of zincbearing waste in steel plant. Iron and Steel, 2019, 54(10): 111-116.
