摘要
节能环保是现代化工业生产的新指标,这不仅可以达到环境保护的目的,同时还能带来可观的经济效益。工业中碱法生产氧化铝产生了大量的滤液,可通过水热合成法除去滤液中的硅杂质并合成雪硅钙石,经煅烧后,得到结晶度较好的硅灰石,从而变废为宝,应用于各种领域。本试验将脱硅滤液做为原料,通过水热合成法制备硅灰石。根据正交试验的条件设定,确定水热合成硅灰石的最适宜n(Ca)/n(Si)为0.6,最适宜合成温度为180℃,在此条件下合成出的硅灰石产品,纯净度和结晶度最好。
Energy saving is the new target of many modern industries,and it can not only protect environment but also bring economic benefits.The production of alumina brings a great amount of filtrate,which can be hydrothermal synthesized to eliminate silicon and obtain tobermorite.After calcinations,tobermorite becomes wollastonite which is useful in mang fields.The optimum conditions are obtained by orthogonal tests.The Ca /Si ratio of the reactant is 0.6,the reaction temperature is 180 ℃.Under this condition,wollastonite with high purity and good crystallity is produced.
出处
《化学工业与工程》
CAS
2010年第6期490-494,共5页
Chemical Industry and Engineering
基金
北京市大学生创新性实验项目基金(51900265029)
关键词
脱硅滤液
硅灰石
水热合成法
合成条件
desilication filtrate
wollastonite
hydrothermal synthesis
synthesis conditions
