电石渣水泥熟料生产线结皮原因分析及处理

Cause Analysis and Treatment of Calcium Carbide Slag Cement Clinker Production Line Skinning

电石渣作原料生产水泥,因电石渣氯离子有害成分含量及硫碱比远高于用石灰石作原料的水泥生产线,预热器、分解炉系统结皮一直是影响回转窑稳定运行的重大工艺问题。通过采用硫酸清净工艺代替盐酸清净工艺,降低了原料中的氯离子含量和硫碱比;通过控制煤粉燃烧,避免了分解炉局部高温;通过采取在烟室、分解炉缩口使用微晶板等措施后,系统结皮减少了60%以上,实现了系统的高效稳定运行。

Carbide slag is used as raw material to produce cement.Because the content of harmful components of chloride ions and sulfur-alkali ratio of calcium carbide slag are much higher than those of limestone cement production line,the crusting of preheater and precalciner system has always been a major technological problem affecting the stable operation of rotary kiln.By adopting the sulfuric acid cleaning process instead of the hydrochloric acid cleaning process,the chloride ion content and the sulfur-alkali ratio in the raw materials are reduced;by controlling the combustion of pulverized coal,the local high temperature of the precalciner is avoided.After such measures,the skinning of the system has been reduced by more than 60%,realizing the efficient and stable operation of the system.