Formcoke production from char fines of hard brown coals by air curing

H. Cengizler; M. Kemal

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Formcoke production from char fines of hard brown coals by air curing

机译：通过空气固化由硬褐煤的焦炭细粉生产甲醛

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The purpose of the present study was to explore the technical feasibility of formcoke production from non-coking bright hard brown coals and pitch as a binder by air curing. The briquettes obtained from the chars of Soma coals carbonised at 500, 600, 700, 800 and 900 deg C with 12 percent pitch were air cured in a streaming gas containing 16 percent O_2 (air + N_2) for 120 min at 270 deg C and the formcoke strength was found to be 10-40 percent higher than that of raw briquettes. Under the prevailing conditions, the formcoke strength and the apparent specific gravity of the green and formcoke briquettes increased as the carbonisation temperature increased, reaching a maximum at the optimum carbonisation temperature of 800 deg C. M_(40) and M_(10) values and the compressive strength of SK800 formcokes were determined to be 92.3, 77 percent and 23.5 MPa respectively being similar to those of conventional cokes produced at coke ovens. The optimum curing conditions (pitch content, curing time and temperature) were determined using TK800 char. The optimum curing time for TK800 briquettes at 220 deg C was determined to be 90 min. The formcoke strength of TK800 briquettes subjected to a thermal treatment at 220 deg C was lower than that of the briquettes air cured at the same temperature. The optimum curing temperature for TK800 briquettes with 10 percent pitch and cured in a gas stream containing 16 percent O_2 in terms of formcoke strength was determined to be 285 deg C. M_(40) and M_(10) values and the compressive strength of TK800 formcokes were determined to be 91, 8.1 percent and 19.6 MPa respectively. The experimental results reveal the advantages of the method because the formcokes produced possess suitable properties for various metallurgical processes and smokeless fuel consumption. The gas and tar obtained during the carbonisation of raw coal are the added benefits.

机译：本研究的目的是探讨由非焦化的硬质褐煤生产焦炭并通过空气固化将沥青用作粘结剂的技术可行性。将在500、600、700、800和900摄氏度下碳化12％的索马煤焦炭制成的煤块，在含有16％O_2（空气+ N_2）的气流中在270摄氏度空气固化120分钟。结果发现，焦炭强度比生煤球高10-40％。在当前条件下，生坯和生坯煤球的焦炭强度和表观比重随碳化温度的升高而增加，在最佳碳化温度800摄氏度时达到最大值。M_（40）和M_（10）值和测得的SK800焦炭的抗压强度分别为92.3、77％和23.5 MPa，与在焦炉中生产的常规焦炭相似。使用TK800炭确定最佳的固化条件（沥青含量，固化时间和温度）。确定TK800型煤在220℃的最佳固化时间为90分钟。在220℃下进行热处理的TK800型煤的成型强度低于在相同温度下空气固化的型煤。确定的TK800型煤的最佳固化温度为10％沥青，并在以焦炭强度计包含16％O_2的气流中固化，确定为285℃。M_（40）和M_（10）值以及TK800的抗压强度测得的焦炭分别为91、8.1％和19.6 MPa。实验结果表明了该方法的优势，因为所生产的焦炭具有适合各种冶金工艺的特性和无烟燃料消耗。原煤碳化过程中获得的气体和焦油是额外的好处。

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《Transactions of the Institutions of Mining and Metallurgy, Section C. Mineral Processing and Extractive Metallurgy》 |2006年第3期|共7页
作者
H. Cengizler; M. Kemal;
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正文语种 eng
中图分类矿业工程;
关键词
Formcoke; Formcoke curing; Formcoke oxidation;

机译：甲醛;甲醛固化;甲醛氧化;

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1. Formcoke production from char fines of hard brown coals by air curing [J] . H. Cengizler, M. Kemal Transactions of the Institutions of Mining and Metallurgy, Section C. Mineral Processing and Extractive Metallurgy . 2006,第3期

机译：通过空气固化由硬褐煤的焦炭细粉生产甲醛
2. Synthesis gas production from catalytic gasification of waste biomass using nickel-loaded brown coal char [J] . Xianbin Xiao, Jingpei Cao, Xianliang Meng, Fuel . 2013,第JANa期

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3. Flash Heat Processing of Brown Coals and Hard-Coal Preparation Products prior to Their Use for Energy Production [J] . V. A. Moiseev, V. G. Andrienko, E. G. Gorlov, Solid Fuel Chemistry . 2013,第1期

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Formcoke production from char fines of hard brown coals by air curing

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