Experimental Investigation on the Influence of Ultrahigh Pressure Cold Briquetting Characteristics with Binders for Pulverized Coal in Hami Area

IF 0.8 4区工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY

Solid Fuel Chemistry Pub Date : 2025-03-31 DOI:10.3103/S0361521924700526

Sen Zhang, Haonan Fang, Yiming Gao

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Abstract

Briquetting is a crucial component of clean coal technology. Pulverized coal from Naomao Lake coal mine in Hami area was selected as experimental sample to investigate the effects of binder and moisture content on briquette quality. The results show that binders can enhance relax density, compressive strength, hydrophobicity and durability. And, binder type has a significant impact on energy consumption during briquetting process. For cement and clay, as addition ratio increases, briquetting energy consumption also increases. For bentonite and sodium humate, addition ratio has a small impact on briquetting energy consumption. In addition, compressive strength, hydrophobicity and durability of briquettes gradually increase with the enhancement of moisture content. Moisture can provide effective lubrication during moulding process, reducing friction between raw materials and between raw materials and mold. Afterward, by using the PCA method, a new comprehensive evaluation index was established to investigate the influence of binder type and binder ratio on the quality characteristics of pulverized coal briquetting. The results show that comprehensive evaluation index of briquettes gradually increases with the enhancement of binder ratio, and the briquette containing 15% sodium humate has the highest comprehensive evaluation index, which confirms the reliability of the proposed evaluation method for briquette quality.

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哈密地区粘结剂对煤粉超高压冷成型特性影响的实验研究

压块是清洁煤技术的重要组成部分。以哈密地区直毛湖煤矿的煤粉为实验样品，研究了粘结剂和含水率对型煤质量的影响。结果表明，粘结剂能提高材料的松弛密度、抗压强度、疏水性和耐久性。粘结剂类型对成型过程的能耗影响较大。对于水泥和粘土，随着掺量的增加，成型能耗也随之增加。对于膨润土和腐植酸钠，添加比例对成型能耗影响较小。此外，随着含水率的增加，型煤的抗压强度、疏水性和耐久性逐渐提高。水分可以在成型过程中提供有效的润滑，减少原料之间以及原料与模具之间的摩擦。随后，利用主成分分析法，建立了一种新的综合评价指标，研究了粘结剂类型和粘结剂配比对煤粉成型质量特性的影响。结果表明，随着粘结剂配比的提高，型煤的综合评价指标逐渐提高，其中腐植酸钠含量为15%的型煤综合评价指标最高，验证了所提出的型煤质量评价方法的可靠性。

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来源期刊

Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS

CiteScore

1.10

自引率

28.60%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.