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›› 2015, Vol. 15 ›› Issue (2): 278-283.

• 过程与工艺 • 上一篇    下一篇

煤焦化过程中矿相转变规律

邱淑兴 张生富 张溪 杨明睿 刘伟   

  1. 重庆大学材料科学与工程学院 重庆大学材料学院 重庆大学材料科学与工程学院 重庆大学材料科学与工程学院 重庆大学材料科学与工程学院
  • 收稿日期:2015-05-04 修回日期:1900-01-01 出版日期:2015-05-05 发布日期:2015-05-05
  • 通讯作者: 张生富

Study on Transformation of Minerals in Coking Process of Coals

QIU Shu-xing ZHANG Sheng-fu ZHANG Xi YANG Ming-rui LIU Wei   

  1. College of Materials Science and Engineering, Chongqing University Chongqing University College of Materials Science and Engineering, Chongqing University College of Materials Science and Engineering, Chongqing University College of Materials Science and Engineering, Chongqing University
  • Received:2015-05-04 Revised:1900-01-01 Online:2015-05-05 Published:2015-05-05
  • Contact: ZHANG Sheng-fu

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被引次数

8

摘要： 利用XRD和物相定量分析方法研究了南桐和永混煤及含添加剂的南桐煤在焦化过程中的矿相转变规律. 结果表明，南桐煤焦化过程中，占灰分含量46.03%的高岭土完全分解，其中65.24%分解生成莫来石，17.02%分解生成方石英和γ氧化铝. 灰分中石英类矿物含量由19.57%升至35.48%，含量为7.83%的黄铁矿中89.53%转化为磁黄铁矿，含量为17.64%的方解石完全分解且部分生成CaH2PO4. 永混煤焦化过程中，除方解石主要转化为褐硫钙石和硬石膏之外，其他矿物质的转变规律与南桐煤相近. 在南桐煤中添加5% CaO和Fe2O3焦化后，主要产物莫来石相较于添加前分别下降4.80%和5.68%，石英类矿物下降21.17%和20.17%. 同时，添加剂提高了焦炭中含钙和含铁催化性矿物的含量，且焦炭的反应性分别提高31.45%与15.05%.

关键词: 煤, 焦化, 物相转变, 矿物质, 定性分析, 定量分析

Abstract: XRD and general structure analysis system were used to studied transformation of minerals in Nantong and Yonghun coals, and Nantong coal with additives in their coking process. The results showed that kaolinite at 46.03% of the ash content was decomposed completely, 65.24% of kaolinite decomposed to mullite, and the other 17.02% to cristobalite and γ-alumina. In addition, the quartz mineral content in the ash was increased from 19.57% to 35.48%. 89.53% of pyrite with the content of 7.83% in the ash was converted into pyrrhotite. Calcite with the content of 17.64% was decomposed completely, and partially converted into CaH2PO4. During coking process of Yonghun coal, the transformation rule of other minerals was similar to that of Nantong coal, except that calcite was mainly converted to oldhamite and anhydrite. Under the addition of CaO and Fe2O3 with the content of 5% of the coal into Nantong coal, the content of mullite was decreased by 4.80% and 5.68%, and that of quartz minerals by 21.17% and 20.07%, respectively. Adding reagents could improve the content of minerals containing calcium and iron in the coke, the coke reactivity index was increased by 31.45% and 15.05%, respectively.

Key words: coal, coking, phase transformation, mineral, qualitative analysis, quantitative analysis

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