摘要
Humic acid sodium was used as an inhibitor to the secondary reaction in the process of clinker extraction.When the addition of humic acid sodium to clinker was up to about 0.43%,the extraction efficiency of alumina and caustic from clinker will be increased by 3.87% and 4.51%,respectively.Its inhibition mechanism was studied by the determination of infrared(NIR)spectra and the concentrations of SiO2 and Ca2+ in the extracted solution.The results showed that the big molecules of humic acid sodium enwrapped dicalcium silicate surface,which prevented dicalcium silicate from contacting with the solution.At the same time,the anions dissociating from humic acid sodium could combine with Ca2+,which resulted in the concentration reduction of Ca2+ in the solution.Therefore,it was inhibited to form hydrated aluminosilicate silicate which caused the loss of sodium aluminate.
Humic acid sodium was used as an inhibitor to the secondary reaction in the process of clinker extraction. When the addition of humic acid sodium to clinker was up to about 0.43%, the extraction efficiency of alumina and caustic from clinker will be increased by 3.87% and 4.51%, respectively. Its inhibition mechanism was studied by the determination of infrared （NIR） spectra and the concentrations of SiO2 and Ca^2＋ in the extracted solution. The results showed that the big molecules of humic acid sodium enwrapped dicalcium silicate surface , which prevented dicalcium silicate from contacting with the solution. At the same time, the anions dissociating from humic acid sodium could combine with Ca^2＋, which resulted in the concentration reduction of Ca^2＋ in the solution. Therefore, it was inhibited to form hydrated aluminosilicate silicate which caused the loss of sodium aluminate.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2008年第2期526-530,共5页
CIESC Journal
基金
国家自然科学基金项目(50674028)
中国铝业股份公司资助~~
关键词
腐殖酸钠
熟料
二次反应
硅酸二钙
烧结法
humic acid sodium
clinker
secondary reaction
dicalcium silicate
sintering process
