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| Optimization experiment of sinter basicity on low-grade complex ore |
| WU Qiang1，ZHU Zi-zong1，ZENG Jian-hua1，XIONG Hao1，MENG Xian-tao2，ZHANG Shi-qiao2 |
1. College of Material Science and Engineering， Chongqing University， Chongqing 400044， China
2. Xinxing Ductle Iron Pipes Xinjiang Co.， Ltd.， Hejing 841300， Xinjiang， China |
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Abstract In order to utilize the lean ore resources in Xinjiang rationally and optimize the?blast furnace charge structure， the optimizing experiments on sinter basicity were carried out. In view of the complex ore in Xinjiang，Seven groups of sintering pot tests were conducted. The basicity of all these tests changed among 1.65 and 2.00. Through analyzing the mechanical strength， metallurgical properties and mineral composition of sinter， it is concluded that when the alkalinity was between 1.80 to 1.85， an obvious increase of the SFCA content in sinter can be observed， the ISO drum strength of sinter was comparatively high and the yield can be as high as 78%， the reducibility and low temperature reduction desintegration index of sinter were also improved， and the soft melting range was the narrowest. So it is the optimal basicity range of sinter. However， when the basicity was among 1.65 and 1.75， the drum index declined and the property of molten drop became worse. It is the pulverization basicity interval of sinter， therefore considering the complexity of ore in Xinjiang area， this range should be avoided in sintering production.
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Received: 06 January 2015
Published: 06 January 2016
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2016, Vol. 51 
