Study on preparation and properties of steel slag based composite gel for mine fire prevention and extinguishing

IF 5.3 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Arabian Journal of Chemistry Pub Date : 2024-08-14 DOI:10.1016/j.arabjc.2024.105966

Tan Li , Hengze Zhao , Yipei Qi , Yu Zhang , Ye Li

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Abstract

A novel fire-preventing composite gel, mainly made from steel slag (SS) and silica fume (SF), was created for a coal mine’s spontaneous combustion. The gelation mechanism of the steel slag-based composite gel (SSG) was investigated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (SEM). The findings suggest that SSG is generated through the processes of hydration and geopolymerization involving SS and SF. And in the alkaline milieu of a 1.5 M water glass solution, SSG manifests enhanced strength and water retention capacities. Moreover, the fire prevention and extinguishing performance of the SSG was analyzed and verified using low-temperature oxidation, thermogravimetry, and low temperature nitrogen adsorption experiment (LTNA). The SSG has proven highly effective in suppressing spontaneous coal combustion by inhibiting CO production, raising the coal oxidation temperature, and reducing the contact area between oxygen and the coal body.

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用于矿山防火和灭火的钢渣基复合凝胶的制备和性能研究

针对某煤矿的自燃问题，研究人员创建了一种新型防火复合凝胶，主要由钢渣（SS）和硅灰（SF）制成。利用 X 射线衍射（XRD）、傅立叶变换红外光谱（FTIR）和场发射扫描电子显微镜（SEM）研究了钢渣基复合凝胶（SSG）的凝胶化机制。研究结果表明，SSG 是通过 SS 和 SF 的水合和土聚合过程生成的。在 1.5 M 水玻璃溶液的碱性环境中，SSG 表现出更强的强度和保水能力。此外，还利用低温氧化、热重和低温氮吸附实验（LTNA）对 SSG 的防火和灭火性能进行了分析和验证。事实证明，SSG 可抑制 CO 的产生，提高煤的氧化温度，减少氧气与煤体的接触面积，从而有效抑制煤的自燃。

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来源期刊

Arabian Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

10.80

自引率

3.30%

发文量

763

审稿时长

63 days

期刊介绍： The Arabian Journal of Chemistry is an English language, peer-reviewed scholarly publication in the area of chemistry. The Arabian Journal of Chemistry publishes original papers, reviews and short reports on, but not limited to: inorganic, physical, organic, analytical and biochemistry. The Arabian Journal of Chemistry is issued by the Arab Union of Chemists and is published by King Saud University together with the Saudi Chemical Society in collaboration with Elsevier and is edited by an international group of eminent researchers.