ABSTRACT

Non-hazardous coal briquettes were prepared from the blend of indigenous Lakhra coal containing high sulfur, slaked lime, used engine oil and bentonite clay. Briquettes were prepared with different compositions to observe the respective behavior of components. Raw coal and coal briquettes were characterized with ultimate and proximate analysis, TGA, emission gas analysis, mechanical strength, and smoke number. The optimized briquetting composition was observed as 72% raw coal, 16% bentonite clay as binder, 6% slaked lime and 6% used engine oil. Ignition time of this composition was reduced from 12 minutes to 6 minutes. Testo smoke number of coal briquette was much lower than that of raw coal, and higher amount of smoke in raw coal was reduced by briquetting. The heating value in optimized briquette batch 4 was higher as compared to other briquetting batches. TGA test showed that temperature rise per unit time was similar for both in raw coal as well as in coal briquettes, while the weight reduced per unit time was less for coal briquettes as compared to raw coal. Also the mechanical Strength was achieved up to 17.96 MPa. It was observed that mechanical strength was increased in coal briquettes with increase in amount of oil.

摘要

无害型煤由含有高硫的当地 Lakhra 煤、熟石灰、废机油和膨润土混合而成。用不同的成分制备团块，以观察组分各自的行为。原煤和型煤通过元素分析和工业分析、TGA、排放气体分析、机械强度和烟度进行表征。优化的压块成分为 72% 原煤、16% 作为粘合剂的膨润土、6% 熟石灰和 6% 废机油。该组合物的点燃时间从12分钟减少到6分钟。型煤的特斯托烟度远低于原煤，原煤中较高的烟度通过成型得到降低。与其他压块批次相比，优化的压块批次 4 的热值更高。TGA测试表明，原煤和型煤的单位时间温升相似，而型煤单位时间减少的重量小于原煤。机械强度也达到了17.96 MPa。据观察，型煤的机械强度随着油量的增加而增加。