| 回转窑直接还原工艺的生球预热制度 |
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| 引用本文： | 路朝晖,金晓晖,高金涛,陈煜,陈代明,李士琦. 回转窑直接还原工艺的生球预热制度[J]. 过程工程学报, 2011, 11(4): 633-638 |
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| 作者姓名： | 路朝晖 金晓晖 高金涛 陈煜 陈代明 李士琦 |
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| 作者单位： | 北京科技大学冶金与生态工程学院北京科技大学冶金与生态工程学院北京科技大学冶金与生态工程学院新兴铸管(新疆)资源发展有限公司北京科技大学冶金与生态工程学院北京科技大学冶金与生态工程学院 |
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| 摘 要： | 以新疆蒙库高品位磁铁精矿为原料，采用预热球团一步法煤基直接还原工艺制取铁. 考察了不同预热制度下预热球的质量，以研究预热工艺在磁铁精矿球还原中的作用效果，其中预热球的抗压强度和粉未率是衡量预热工艺作用效果的重要指标. 通过链篦机预热处理生球以提高预热球强度，有效降低干球粉末率. 由实验结果确定最佳预热制度. 在预热温度800~850℃、预热时间15~18 min、预热风速1.5~1.8 m/s、料高100 mm的预热条件下，得到的预热球团抗压强度为600 N/个以上，比其他预热制度下得到的预热球团抗压强度有较大提高. 由扩大型全流程实验可知，在该条件下得到的直接还原铁质量完全达到生产要求.
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| 关 键 词： | 磁铁精矿 预热制度 干球粉末率 预热球 强度 直接还原铁 |
| 收稿时间： | 2011-07-27 |
Preheating System of Green Pellets with Rotary Kiln Direct Reduction Process |
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| LU Zhao-hui,JIN Xiao-hui,GAO Jin-tao,CHEN Yu,CHEN Dai-ming,LI Shi-qi. Preheating System of Green Pellets with Rotary Kiln Direct Reduction Process[J]. Chinese Journal of Process Engineering, 2011, 11(4): 633-638 |
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| Authors: | LU Zhao-hui JIN Xiao-hui GAO Jin-tao CHEN Yu CHEN Dai-ming LI Shi-qi |
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| Affiliation: | LU Zhao-hui1,2,JIN Xiao-hui1,GAO Jin-tao1,CHEN Yu2,CHEN Dai-ming1,LI Shi-qi1 [1.Metallurgical and Ecological Engineering School,University of Science and Technology Beijing,Beijing 100083,China,2.Xinxing Cast Pipe(Xinjiang) Co.Ltd.,Urumchi,Xinjiang 830000,China] |
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| Abstract: | The direct reduction of iron was carried out by pellet preheating and one-step coal-based direct reduction process with the high grade magnetite concentrate from Mengku,Xinjiang,as raw material.The quality of preheated pellets at different preheating system conditions was examined in order to determine the effect of preheating process when magnetite concentrate pellets were reduced.Both the compressive strength and degradation index of preheated pellet are the important indicators to measure the preheating ... |
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| Keywords: | magnetite concentrate preheating system powder efficiency of dried balls preheated pellets compressive strength directly reduced iron |
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