呋喃糖类添加剂对铝酸钠溶液种分过程的影响  

Effect of Ribose Additive on the Seeded Precipitation of Sodium Aluminate Solution

作　　者：董楠娅[1] 陈启元[1] 尹周澜[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《有色金属（冶炼部分）》2008年第3期19-22,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(20476107);国家重点基础研究发展规划资助项目(2005CB623702)

摘　　要：选用核糖作为铝酸钠溶液种分过程的添加剂,在αk=1.40、温度75℃、搅拌速度140 r/min、晶种添加量为80 g/L条件下,研究不同添加量和不同苛碱浓度下铝酸钠溶液种分分解率及产品粒度的变化,结果表明:当添加量为150 mg/L、苛碱浓度为160 g/L时,核糖对种分过程的抑制作用最大。随着核糖添加量的增大,产品氢氧化铝粒度减小,但是核糖的添加并不能完全抑制氢氧化铝的附聚。核糖的加入改变了种分过程,且随着苛碱浓度的增大,种分过程出现成核现象,成核现象持续的时间也越长。Ribose was adopted as additive in seeded precipitation process. The effect of the dosage and sodium hydroxide concentration on the decomposition ratio of sodium aluminate solution and particle size distribution （PSD） of gibbsite was investigated, with the condition that initial αk was 1.40, the temperature was 75℃, agitate speed was 140 r/min and the quantity of crystal seed was 80 g/L. Experimental results indicate that the inhibitory effect is obviously when the additive concentration is 150 mg/L and the sodium hydroxide concentration is 160 g/L. When the additive concentration increases, the particle size of gibbsite products increases, but agglomeration process can not be inhibited completely. The crystallization processes changes when ribose is added. When the sodium hydroxide increases, nucleation appears and lasts longer.

关 键 词：核糖 铝酸钠溶液 分解率 粒度分布 成核 

分 类 号：TQ133.1[化学工程—无机化工]