A New Type of Composite Coke Prepared from Steel Slag and Mixed Coal: Preparation Process and Microstructure,Steel Research International

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A New Type of Composite Coke Prepared from Steel Slag and Mixed Coal: Preparation Process and Microstructure
Steel Research International ( IF 1.9 ) Pub Date : 2021-03-24 , DOI: 10.1002/srin.202000697
Zhenggen Liu _{1,

2,

3} , Laigeng Cao _{1,

2,

3} , Mansheng Chu ₄ , Jiwei Bao _{1,

2,

3} , Dong Han _{1,

2,

3} , Mingyu Wang _{1,

2,

3} , Jue Tang _{1,

2,

3}

Affiliation

High-reactivity coke is a kind of burden for a low-carbon blast furnace. Herein, a new method of preparing steel slag composite coke (SCC) from steel slag and mixed coal is proposed. The effects of the raw material ratio and carbonization parameters on the compressive strength, coke reactivity index (CRI), and coke strength after reaction (CSR) are investigated, and also the phase structure and functional group are analyzed. In addition, because the main chemical composition of steel slag is CaO, the effects of the CaO component on the phase structure and functional groups are studied. The results show that with increasing steel slag ratio, the compressive strength of SCC tends to decrease. When increasing the steel slag ratio from 5% to 15%, the CRI tends to increase from 53.7% to 61.0%, and the CSR decreases from 38.6% to 6.2%. With increasing anthracite ratio, the compressive strength of SCC first increases and then decreases. With the carbonization temperature increasing, the Ca₂SiO₄ gradually fades away, Fe₃O₄ is gradually reduced to Fe, and the aromatic CC and stretching OH absorption zone is decreased. With the increasing of CaO content, Ca₂Al₂SiO₇ tends to increase, and the intensity of the peak band (002) and peak band (100) is lowered.

中文翻译：

钢渣混煤制备新型复合焦的制备工艺及微观结构

高活性焦炭是一种低碳高炉的炉料。在此，提出了一种以钢渣和混合煤为原料制备钢渣复合焦（SCC）的新方法。研究了原料配比和炭化参数对抗压强度、焦炭反应指数（CRI）和反应后焦炭强度（CSR）的影响，并分析了相结构和官能团。此外，由于钢渣的主要化学成分是CaO，因此研究了CaO成分对相结构和官能团的影响。结果表明，随着钢渣比的增加，SCC的抗压强度有降低的趋势。当钢渣比从5%提高到15%时，CRI趋于从53.7%提高到61.0%，CSR从38.6%降低到6.2%。随着无烟煤比的增加，SCC的抗压强度先增加后降低。随着碳化温度的升高，Ca₂的SiO ₄逐渐消失，铁₃ ö ₄逐渐减小到Fe和芳香族CC和拉伸 OH吸收区域减小。随着CaO含量的增加，Ca ₂ Al ₂ SiO ₇趋于增加，峰带（002）和峰带（100）的强度降低。

更新日期：2021-03-24

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