关键词:

腐殖酸钠, 熟料, 二次反应, 硅酸二钙, 烧结法

Abstract:

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.

Key words:

腐殖酸钠, 熟料, 二次反应, 硅酸二钙, 烧结法