Influence of Manufacturing Pressure on Properties of Sawdust–Lignite Pellets

IF 0.5 Q4 ENGINEERING, CHEMICAL

Coke and Chemistry Pub Date : 2025-07-21 DOI:10.3103/S1068364X25600538

V. V. Dorokhov, G. S. Nyashina, D. K. Shvedov

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Abstract

The influence of the manufacturing pressure and the composition of pellets based on sawdust and assorted wastes and low-grade fuels on their density and mechanical characteristics (impact strength, hardness, resistance to vibrational loads) is studied experimentally. The specific additives employed are lignite, straw, and cardboard; in each case, 30 wt % of this component is added. With increase in manufacturing pressure and the use of those additives, the sample density may be increased from 2 to 8%. The pellet composition has a greater influence than the manufacturing pressure on the pellets’ characteristics. Adding cardboard increases the impact strength by 0.3–2.6%. Likewise, at fixed manufacturing pressure, the hardness increases by a factor of 1.5–2.9 on adding cardboard or lignite. The best resistance to vibrational loads is observed for sawdust pellets with no additive. The experiments show that 400 MPa is the optimal manufacturing pressure in terms of density, impact strength, hardness, and resistance to vibrational loads. The experimental results may be used in developing technologies for the production and combustion of pelletized fuels consisting of biomass and industrial waste.

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制造压力对木屑-褐煤球团性能的影响

实验研究了以木屑、各种废弃物和低品位燃料为原料制备颗粒的制造压力和成分对颗粒密度和力学特性（冲击强度、硬度、抗振动载荷）的影响。具体使用的添加剂有褐煤、稻草和纸板；在每种情况下，添加30% wt %的这种成分。随着制造压力的增加和这些添加剂的使用，样品密度可以从2%增加到8%。颗粒组成比制造压力对颗粒特性的影响更大。添加纸板可使冲击强度提高0.3-2.6%。同样，在固定的制造压力下，添加硬纸板或褐煤，硬度增加1.5-2.9倍。观察到无添加剂的木屑颗粒对振动载荷的抵抗性能最好。实验表明，在密度、冲击强度、硬度和抗振动载荷方面，400 MPa为最佳制造压力。实验结果可用于开发由生物质和工业废料组成的颗粒燃料的生产和燃烧技术。

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来源期刊

Coke and Chemistry ENGINEERING, CHEMICAL-

CiteScore

0.70

自引率

50.00%

发文量

期刊介绍： The journal publishes scientific developments and applications in the field of coal beneficiation and preparation for coking, coking processes, design of coking ovens and equipment, by-product recovery, automation of technological processes, ecology and economics. It also presents indispensable information on the scientific events devoted to thermal rectification, use of smokeless coal as an energy source, and manufacture of different liquid and solid chemical products.