1. Iron and Steel Technology Research Institute, Research Institute of Technology, Shougang Group Corporation, Beijing 100043, China 2. Laboratory of Green Recyclable Process for Iron and Steel Production Technology, Beijing 100043, China 3. Production and Technology Department, Qian′an Zhonghua Coal Chemical Co., Ltd., Qian′an 064404, Hebei, China 4. CDQ Workshop, Qian′an Zhonghua Coal Chemical Co., Ltd., Qian′an 064404, Hebei, China
Abstract：In order to study thermal shock in CDQ(coke dry quenching)and its effect on the refractory in chute, thermal shock tests and heat transfer analysis in CDQ under different working conditions were conducted. The results showed that the greater the range of thermal shock temperature or the more the thermal temperature cycle number, the higher the loss rate of flexural strength; the temperature of circulating gas at chute would fluctuate when any operating condition changed. Results of 3D modeling of CDQ showed that when the cold circulating gas was uniformly distributed blowing from the bottom, the flow field in CDQ was unevenly distributed. The circulating gas close to the exit had higher velocity and volume and lower temperature, while lower velocity and volume and higher temperature far away from the exit. And the maximum temperature difference between the two sides was 653 ℃. The thermal shock was more serious because of the unevenly distributed temperature field. To prolong the service life of refractory material of the chute, stable operation and less fluctuation in operating conditions should be necessary to reduce the shock thermal shock in CDQ.
2018, Vol. 28 
