氧化铝生产中氯的性能研究

A STUDY ON BEHAVIOR OF CHLORINE IN PRODUCTION OF ALUMINA

本文报导用碱法生产氧化铝如碱石灰烧结法中氯的性能,测定了原料中的氯含量,在烧结工艺中含氯矿物进行化学反应转变为 KCl、NaCl,氯在铝酸钠溶液中的含量达到1克/升,在脱硅中生成的产物是方钠石型化合物,Na_2O·Al_O_2·1.8SiO_2·nH_2O·Na_2X,X 是阴离子,如存在于溶液中的氯,氢氧化铝中的氯含量是0.002％,并给出了烧结法中的物料平衡。在拜耳法中含氯矿物的分解约80％,铝酸钠溶液中的氯超过10克/升,氯在赤泥中的产物是方钠石型或钙霞石型化合物。

The behavior of chlorine in producing alumina by alkali processes such as Soda-Lime Sintering Process was reported.the content of chlorine in raw materials was determi- ned.During the sintering technology,through chemical reactions,chlorine containing minerals were transformed into chlorides,KCI,NaC1,and the concentration of chlo- rine in sodium aluminate solution reached 1g/l.The product formed in desilica- tion was sodalite compound,Na_2 O·Al_2O_3·I.8SiO_2·Na_2O·Na_2X,X was an an- ion.The content of chlor...