Abstract In the new process of CaC2 production, C–Ca pellets need to be pyrolysed in a prepyrolysis furnace before being placed in a CaC2 furnace. In this paper, the factors influencing the performance of composite pellets in a pyrolysis furnace are studied experimentally. A comprehensive performance-evaluation system is established to calculate and evaluate composite pellets comprising five raw materials. The pyrolytic rate, compressive strength, and dust concentration of the composite pellets are tested through thermogravimetry, universal pressure tester and dust concentration detector, respectively. The effects of C/Ca ratio, temperature, time and raw material composition on these properties are explored. Results show that during the pyrolysis of the composite pellets, the C-containing raw materials have a significant effect on various performance indicators. With increased C/Ca ratio, the pellet pyrolysis rate and compressive strength show a downward trend; with increased pyrolysis temperature and time, the pellet pyrolysis rate, compressive strength and activity show an upward trend; with a change in raw material composition, the pellet activity and dust concentration change significantly. The comprehensive properties of CaO + coke and CaO + anthracite are superior to those of other raw materials in all aspects, and this finding is in line with the industrial-production practice.

中文翻译：

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热解炉碳钙球团性能影响因素及评价体系

摘要 在CaC2生产新工艺中，C-Ca球团需要先在预热解炉中进行热解，然后再放入CaC2炉中。本文对影响复合球团在热解炉中性能的因素进行了实验研究。建立了综合性能评价体系，对五种原料组成的复合颗粒进行计算和评价。分别通过热重法、万能压力测试仪和粉尘浓度检测仪测试复合颗粒的热解速率、抗压强度和粉尘浓度。探索了 C/Ca 比、温度、时间和原材料组成对这些性能的影响。结果表明，在复合颗粒热解过程中，含C原料对各项性能指标影响显着。随着C/Ca比的增加，球团热解速率和抗压强度呈下降趋势；随着热解温度和时间的增加，球团的热解速率、抗压强度和活性呈上升趋势；随着原料组成的变化，球团活性和粉尘浓度发生显着变化。CaO+焦炭和CaO+无烟煤的综合性能在各方面均优于其他原料，这一发现符合工业生产实践。抗压强度和活性呈上升趋势；随着原料组成的变化，球团活性和粉尘浓度发生显着变化。CaO+焦炭和CaO+无烟煤的综合性能在各方面均优于其他原料，这一发现符合工业生产实践。抗压强度和活性呈上升趋势；随着原料组成的变化，球团活性和粉尘浓度发生显着变化。CaO+焦炭和CaO+无烟煤的综合性能在各方面均优于其他原料，这一发现符合工业生产实践。