CAJ | 학술논문

种分氢氧化铝中碱含量变化规律关系到氢氧化铝的质量和碱耗，通过测定溶液浓度和电导率、氢氧化铝中碱含量和粒度分布以及分析粒子形貌，研究种分氢氧化铝中碱含量的变化规律。结果表明，溶液组分浓度高、球磨晶种循环、种分温度低、初始分解速率快或产品比表面积大都会导致氢氧化铝中碱含量升高；在低硅铝酸钠溶液种分过程中，粒子的附聚得到抑制，超细氢氧化铝中碱主要以晶格碱形式存在，以钠硅渣形式存在的碱含量极低；同时，升高初始分解温度，晶种老化，降低分解速率，延长种分时间，都有利于产品中碱含量的降低。结果还表明：种分过程中，-+4)Na Al(OH 离子可能对产品中碱含量有很大的影响。
충분경양화려중감함량변화규률관계도경양화려적질량화감모，통과측정용액농도화전도솔、경양화려중감함량화립도분포이급분석입자형모，연구충분경양화려중감함량적변화규률。결과표명，용액조분농도고、구마정충순배、충분온도저、초시분해속솔쾌혹산품비표면적대도회도치경양화려중감함량승고；재저규려산납용액충분과정중，입자적부취득도억제，초세경양화려중감주요이정격감형식존재，이납규사형식존재적감함량겁저；동시，승고초시분해온도，정충노화，강저분해속솔，연장충분시간，도유리우산품중감함량적강저。결과환표명：충분과정중，-+4)Na Al(OH 리자가능대산품중감함량유흔대적영향。
High soda content in fine alumina trihydrate(ATH) limits its application and increases the soda consumption. The variation of soda content in the fine ATH by seeded precipitation was determined by detection of electric conductivity of solution, soda content in ATH, measurement of particle size distribution and microscopic analysis. The results show that high concentration of sodium aluminate solution, ground circulative seed, low temperature or fast initial precipitation rate increases the soda content in ATH. Soda mainly exists in lattice soda and less soda in desilication product (DSP) exists in the fine ATH precipitated from sodium aluminate solution with concentration of Al2O3 (ρAl2O3) more than 160 g/L and mass ratio of alumina to silica (μSiO2) of 400, and lattice soda decreases with increasing initial precipitation temperature, aging seed, and low precipitation rate and precipitation time. Results also imply that -+ 4)Na Al(OH ion-pair influences lattice soda content in ATH on the basis of electric conductivity variation.