为了合理选配水泥窑协同处置垃圾生产线用耐火材料，采用静态坩埚法并借助 SEM研究了焚烧城市生活垃圾对水泥窑用耐碱砖、抗剥落高铝砖的侵蚀。结果表明：焚烧城市生活垃圾对水泥窑用耐火材料的侵蚀机制主要为渣渗透和渣侵蚀，焚烧垃圾时产生的含碱、硫、氯等的高温气体和耐火材料发生发应，生成了低熔点的硫酸盐、氯盐以及复合盐，使耐火材料产生反应变质，而反应变质层结构疏松，在热应力的作用下易造成剥落。因此，协同处置垃圾的水泥窑用耐火材料的选配应考虑到材料的抗侵蚀性和抗剥落性等因素，建议分解炉选用抗剥落高铝砖和抗结皮 SiC 浇注料，而预热器选用高强耐碱砖和高强耐碱浇注料。
Corrosion of burning urban domestic wastes to alkali-resistant bricks and spalling-resistant high alumina bricks was researched by static crucible method and SEM in order to choose refractories for ce-ment rotary kilns for collaboratively disposing wastes.The result indicates that the main corrosion mecha-nism is slag permeation and corrosion;the emitted high temperature gases containing alkali,sulfur and chlorine during burning the wastes react with refractories forming low melting point sulfate,chloride and compound salts,which metamorphose the refractories,and the loose metamorphic layer is easy to spall un-der thermal stress.So,corrosion resistance and spalling resistance shall be taken into account when choo-sing refractories for cement rotary kilns for collaboratively disposing wastes.It is suggested that decompo-sition furnaces should adopt spalling resistant high alumina bricks and anti-coating SiC castables,and pre-heating equipment should choose high strength alkali-resistant bricks and castables.
参考文献
| [1] | 汪澜,徐迅,刘姚君,魏丽颖.我国利用水泥窑协同处置危险废物和城市生活垃圾现状[C].中国水泥协会环保和资源综合利用专业委员会成立大会暨中国水泥环资论坛论文集,2011:107-109. |
| [2] | 王杰曾,袁林,成洁.水泥窑用无铬碱性耐火材料的研究进展[J].耐火材料,2014(03):161-165. |
| [3] | 马军涛 .掺烧城市垃圾对水泥窑衬、水泥性能及重金属浸出量的影响[D].郑州大学,2009. |
| [4] | 袁文献,毛志伟.回转式焚烧炉与水泥窑协同处置生活垃圾技术[J].中国水泥,2011(06):47-49. |
| [5] | 杨秀丽,李冰,刘会林,郑军锋,程远,吴燕萍.Al2O3-Cr2O3-ZrO2砖在医疗垃圾焚烧炉上的应用[J].耐火材料,2014(02):143-144. |
| [6] | 李存弼,董舜杰.垃圾焚烧炉用耐火材料的性能[J].耐火材料,2011(06):477-478. |
| [7] | 赵继增,刘忠选,陈路兵,周磊,张广智,刘永楷.垃圾焚烧炉用耐火材料的现状与发展[J].耐火材料,2000(06):353-355,358. |
| [8] | 何捷.利用水泥窑协同处置固体废物污染控制要求[J].中国水泥,2013(08):61-62. |
| [9] | 张绍坤.危险废物焚烧回转窑的砌筑与烘炉技术浅议[J].耐火材料,2012(03):236-238. |
| [10] | 袁林,王杰曾.新型干法水泥窑用耐火材料的现状与发展[J].耐火材料,2010(05):383-386. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%