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Method for preparing high-strength porous composite ceramic from coal slime
The invention discloses a method for preparing high-strength porous composite ceramic from coal slime, and belongs to the technical field of coal slime solid waste utilization. In the preparation process, coal slime serves as a main raw material, a small amount of silicon powder is added into the coal slime, a green body is obtained through the processes of ball milling, drying, screening, forming and the like, and the green body is subjected to high-temperature sintering in an atmosphere protection sintering furnace. In argon, the silicon powder and the coal slime are subjected to high-temperature reaction sintering to generate the porous multiphase ceramic with the main phase being silicon carbide/mullite. In nitrogen, the composite ceramic with silicon nitride/sialon as a main phase is generated. The coal slime is used as a main raw material, the characteristic that the coal slime is good in formability is fully utilized, all the preparation raw materials do not need to be subjected to pretreatment such as burning carbon removal and acid pickling impurity removal, and the preparation method is simple. The environment is protected, solid waste resource utilization of the coal slime is increased, waste can be turned into wealth, and the high-strength porous ceramic is prepared. The porous ceramic prepared by the invention can be used in the fields of heat insulation and heat preservation of industrial kilns, filtration, catalyst carriers and the like.
本发明公开了一种煤泥制备高强多孔复相陶瓷的方法，属于煤泥固废利用技术领域。制备过程中以煤泥为主原料，通过在煤泥中添加少量硅粉，经过球磨、干燥、过筛和成型等工艺得到生坯，将生坯在气氛保护烧结炉中进行高温烧结。在氩气中，硅粉与煤泥经高温反应烧结生成主相为碳化硅/莫来石的多孔复相陶瓷。在氮气中，生成主相为氮化硅/塞隆的复相陶瓷。本发明以煤泥为主原料，充分利用了煤泥成型性好的特点，而且所有的制备原料不需要经过灼烧除碳、酸洗除杂等预处理，制备方法简单。不仅保护环境，增加煤泥的固废资源化利用，还能变废为宝，制备得到高强多孔陶瓷。本发明制备的多孔陶瓷可以用于工业窑炉隔热保温、过滤、催化剂载体等领域。
Method for preparing high-strength porous composite ceramic from coal slime
The invention discloses a method for preparing high-strength porous composite ceramic from coal slime, and belongs to the technical field of coal slime solid waste utilization. In the preparation process, coal slime serves as a main raw material, a small amount of silicon powder is added into the coal slime, a green body is obtained through the processes of ball milling, drying, screening, forming and the like, and the green body is subjected to high-temperature sintering in an atmosphere protection sintering furnace. In argon, the silicon powder and the coal slime are subjected to high-temperature reaction sintering to generate the porous multiphase ceramic with the main phase being silicon carbide/mullite. In nitrogen, the composite ceramic with silicon nitride/sialon as a main phase is generated. The coal slime is used as a main raw material, the characteristic that the coal slime is good in formability is fully utilized, all the preparation raw materials do not need to be subjected to pretreatment such as burning carbon removal and acid pickling impurity removal, and the preparation method is simple. The environment is protected, solid waste resource utilization of the coal slime is increased, waste can be turned into wealth, and the high-strength porous ceramic is prepared. The porous ceramic prepared by the invention can be used in the fields of heat insulation and heat preservation of industrial kilns, filtration, catalyst carriers and the like.
本发明公开了一种煤泥制备高强多孔复相陶瓷的方法，属于煤泥固废利用技术领域。制备过程中以煤泥为主原料，通过在煤泥中添加少量硅粉，经过球磨、干燥、过筛和成型等工艺得到生坯，将生坯在气氛保护烧结炉中进行高温烧结。在氩气中，硅粉与煤泥经高温反应烧结生成主相为碳化硅/莫来石的多孔复相陶瓷。在氮气中，生成主相为氮化硅/塞隆的复相陶瓷。本发明以煤泥为主原料，充分利用了煤泥成型性好的特点，而且所有的制备原料不需要经过灼烧除碳、酸洗除杂等预处理，制备方法简单。不仅保护环境，增加煤泥的固废资源化利用，还能变废为宝，制备得到高强多孔陶瓷。本发明制备的多孔陶瓷可以用于工业窑炉隔热保温、过滤、催化剂载体等领域。
Method for preparing high-strength porous composite ceramic from coal slime
一种煤泥制备高强多孔复相陶瓷的方法
XIA HONGYAN (author) / SI KANG (author) / WANG YI (author) / BI WENHAN (author) / ZHOU ZIYI (author) / SHI ZHONGQI (author) / PENG KANG (author)
2023-07-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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