神木低变质粉煤加入量对型煤型焦性能的影响

Effect of Adding Amount of Shenmu Low Rank Pulverized Coal on Properties of Briquette Formed Coke

以神木低变质粉煤、肥煤与4#主焦煤为原料,配入10%玉米秱秆粘结剂,通过改变神木煤加入量制备出系列型煤型焦。探讨了神木煤加入量对型煤型焦性能的影响。结果表明,神木煤加入量为45%时,型煤型焦性能最佳,型焦工业分析为M ad=0.22%,A d=12.99%,V daf=1.43%,抗压强度与跌落强度分别为3 902.6 N/个、99.45%,M25与M10为75.47%、24.53%,符合工业应用标准。随着神木煤配比增加,型煤型焦强度均呈下降趋势。因为神木煤粒度小,空隙率小,比表面积大,迚入空隙的粘结剂少,高温热解中不能被胶质体完全包围、粘连,熔融不充分。

Taking Shenmu low rank pulverized coal,Shanxi fat coal,Shanxi 4# prime coking coal as raw materials,with 10% corn stalk binder,series of briquette formed cokes were prepared by changing the addition amount of low rank pulverized coal.The effect of the addition amount of Shenmu coal on properties of briquette formed coke was studied.The result showed that,when the addition amount of Shenmu coal was 45%,briquette formed coke had the best performance.Formed coke proximate analysis result was as follows：M_（ad）=0.22%,A_d=12.99%,V_（daf）=1.43%,and compressive strength and fall strength were 3 902.6 N and 99.45%,and M_（25） and M_（10） were 75.47% and 24.53%,which was in accord with industrial application standards.With the increase of the proportion of Shenmu coal,briquette formed coke strength showed a downward trend.Due to small particle size,small porosity and high surface area of Shenmu coal,less binder entered into coal interspaces,and coal was not completely surrounded by the colloid,and the melting was not sufficient in the high-temperature pyrolysis.