|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Energy Technologies and Carbon Dioxide Management
||Research on Greenhouse Gas Emission of Solid Dust Recovery Using Rotary Hearth Furnace Process in China
||Hong-Qiang Liu, Jian-Xun Fu, Si-Yu Liu
|On-Site Speaker (Planned)
The production of zinc-bearing solid dust is up to 6%~8% of total crude steel in steel plant, which is difficult to be recycled in traditional methods. To fully utilize the resources and reduce environmental pollutions, Chinese steel plants are using hearth furnace process (RHF) process to recycle solid dust. A consequential life-cycle inventory was carried out to assess the impact of dust recovery on greenhouse gas emissions based on the local production status. In the study system, the selected steel plant named α which have 10 million tons of Crude steel productivity and 0.48 million tons solid dust come out meanwhile. To research, a RHF production line of 0.3 million tons directly reduced iron (DRI) a year was established to recycle the solid dust. The DRI will be obtained from RHF and sent to the blast furnace as raw materials to reduce the demand for iron ore and coke in steel making processes. By researching on the life-cycle inventory in the system, the steel making process with RHF was 2299.3kgCO2/ton steel. It’s a little higher while compared with the process without RHF, which data is 2297.0 kgCO2/ton steel. The small production of DRI make a small difference to reduce the carbon footprint of steel making process, the added carbon footprint of RHF process is more than BF and other steel making processes reduced. It is concluded that dust recovery has no contribution to the greenhouse gas emission reductions in the technic condition of Chinese steel plants currently.
||Planned: A print-only volume