Evolution and mechanism of a new index liquid-gas ratio (LGR) in coking of coal blending
Evolution and mechanism of a new index liquid-gas ratio (LGR) in coking of coal blending
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配煤焦化新指标液气比（LGR）的演变及机理
DOI：
10.1016/j.jaap.2021.105147
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发表时间：
2021-04
影响因子：
6
通讯作者：
Jinsheng Gao
中科院分区：
文献类型：
--
作者：
Zhihui Chen;Youqing Wu;Sheng Huang;Shiyong Wu;Jinsheng Gao
以煤直接液化残渣为原料，在实验室条件下与5种烟煤混合制备坩埚焦。定义了一个新的指标液气比（LGR）来量化焦化过程中液相和气相的相对量。在炼焦初期（400 - 600 ℃）受到了极大的关注，然后将LGR修改为LGR（t）。对LGR、LGR（t）与焦炭强度的关系及机理进行了研究和总结。结果表明，当高粘结性煤配比不足（<60%）时，LGR越高，焦炭强度越大。当高粘结性煤配比大于60%时，LGR大于37 mm，焦炭强度可以得到保证。LGR和CSR* 的多项式拟合结果表明，当LGR从20 mm增加到40 mm时，焦炭强度先急剧增加后略有下降，配煤的最佳LGR为37 mm，合理LGR范围为33 ~ 40 mm，炼焦初期峰值温度时LGR（t）至少要达到90 mm。此外，混炼系统中的DALO比需要控制在5%以内。另外，在400-430 ℃温度范围内，气体含量不足以将大量的化生体挤压到孔中。最后得出，要获得优质焦炭，必须满足两个条件：高粘结性煤比充足（> 60%）和炼焦气体含量与准质体含量相匹配（合理的LGR和LGR（t））。
Direct coal liquefaction residue (DCLR) was blended with five bituminous coals to prepare crucible coke in the laboratory. A new index liquid-gas ratio (LGR) was defined to quantify relative amounts of liquid phase and gas phase during coking. Great attention was paid to the early stage of coking (400−600 ℃) and then LGR was modified to LGR(t). Relationships and mechanism between LGR, LGR(t) and coke strength were investigated and summarized. Results showed that when high caking property coal ratios was inadequate (< 60 %), the higher LGR was, the larger coke strength was. When high caking property coal ratios was over 60 %, LGR was over 37 mm and coke strength could be guaranteed. Besides, polynomial fitting results of LGR and CSR* showed that coke strength increased sharply and then decreased slightly when LGR increased from 20 to 40 mm. The optimal LGR of coal blends was 37 mm and rational LGR range was from 33 to 40 mm. It was also found that LGR(t) needed to be at least 90 mm at the peak temperature during the early stage of coking. In addition, DCLR ratio in blending system needed to be controlled within 5%. Otherwise, the content of gas was inadequate enough to squeeze large amounts of metaplast into holes at the temperature range 400–430 ℃. Finally, it was concluded that high quality coke could be obtained with two requirements: high caking property coal ratios was abundant (> 60 %) and the content of gas druing coking matched the content of metaplast (rational LGR and LGR(t)).
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DOI：
10.1016/j.ins.2020.02.072
发表时间：
2020-06
期刊：
Inf. Sci.
影响因子：
--
作者：
Yan Yuan;Qilin Qu;Luefeng Chen;Min Wu
通讯作者：
Yan Yuan;Qilin Qu;Luefeng Chen;Min Wu
影响因子：
7.4
作者：
Chao Wang;Shaoping Xu;Guangyong Wang;Yahui Xiao
通讯作者：
Chao Wang;Shaoping Xu;Guangyong Wang;Yahui Xiao
影响因子：
7.4
作者：
Xiaoyang Cao;B. Peng;Lingxue Kong;J. Bai;Zefeng Ge;Huai-zhu Li;Zhen Liu;Ziyang Feng;Dapeng Bi;Zongqing Bai;A. Szlęk;W. Li
通讯作者：
Xiaoyang Cao;B. Peng;Lingxue Kong;J. Bai;Zefeng Ge;Huai-zhu Li;Zhen Liu;Ziyang Feng;Dapeng Bi;Zongqing Bai;A. Szlęk;W. Li
煤直接液化残渣在配煤炼焦中的结焦行为及机理
影响因子：
7.4
作者：
Chen, Zhihui;Wu, Youqing;Gao, Jinsheng
通讯作者：
Gao, Jinsheng
影响因子：
6
作者：
B. R. Reddy;B. Shravani;Bidyut Das;P. S. Dash;R. Vinu
通讯作者：
B. R. Reddy;B. Shravani;Bidyut Das;P. S. Dash;R. Vinu