石蜡-氯化钙-6H2O用量对固结尾矿回填强度和传热特性的影响

IF 5.6 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Hai Li, Aibing Jin, Shuaijun Chen, Yiqing Zhao, You Ju
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引用次数: 0

摘要

深部采矿中的高温挑战仍然对工人的健康和生产效率有害。在充填矿浆中添加相变材料(PCM),并利用这些材料的蓄冷功能降低井下温度,是缓解上述问题的有效方法。实验室制备了石蜡-氯化钙-6H2O 复合 PCM。研究了新材料的成分、相变潜热、热导率和固井尾矿回填(CTB)抗压强度。使用 Fluent 软件模拟了 PCM 的传热特性和内热效应。结果如下(1) 新型石蜡-CaCl2-6H2O 复合 PCM 提高了原生石蜡的导热性,同时避免了 CaCl2-6H2O 的水溶性。(2)推导了 CaCl2-6H2O 与石蜡复合导热系数的计算公式,并从原理上解释了其原因。(3) 应用 "焓-质标度模型 "计算了非反应型复合 PCM 的相变潜热。(4) 添加石蜡-CaCl2-6H2O 复合 PCM 降低了 CTB 强度,但提高了其吸热能力。这项研究可为绿色矿山中使用蓄热回填材料提供理论依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Paraffin–CaCl2·6H2O dosage effects on the strength and heat transfer characteristics of cemented tailings backfill

The challenge of high temperatures in deep mining remains harmful to the health of workers and their production efficiency. The addition of phase change materials (PCMs) to filling slurry and the use of the cold storage function of these materials to reduce downhole temperatures is an effective approach to alleviate the aforementioned problem. Paraffin–CaCl2·6H2O composite PCM was prepared in the laboratory. The composition, phase change latent heat, thermal conductivity, and cemented tailing backfill (CTB) compressive strength of the new material were studied. The heat transfer characteristics and endothermic effect of the PCM were simulated using Fluent software. The results showed the following: (1) The new paraffin–CaCl2·6H2O composite PCM improved the thermal conductivity of native paraffin while avoiding the water solubility of CaCl2·6H2O. (2) The calculation formula of the thermal conductivity of CaCl2·6H2O combined with paraffin was deduced, and the reasons were explained in principle. (3) The “enthalpy-mass scale model” was applied to calculate the phase change latent heat of nonreactive composite PCMs. (4) The addition of the paraffin–CaCl2·6H2O composite PCM reduced the CTB strength but increased its heat absorption capacity. This research can give a theoretical foundation for the use of heat storage backfill in green mines.

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来源期刊
CiteScore
9.30
自引率
16.70%
发文量
205
审稿时长
2 months
期刊介绍: International Journal of Minerals, Metallurgy and Materials (Formerly known as Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material) provides an international medium for the publication of theoretical and experimental studies related to the fields of Minerals, Metallurgy and Materials. Papers dealing with minerals processing, mining, mine safety, environmental pollution and protection of mines, process metallurgy, metallurgical physical chemistry, structure and physical properties of materials, corrosion and resistance of materials, are viewed as suitable for publication.
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