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›› 2013, Vol. 13 ›› Issue (6): 992-997.

• 过程与工艺 • Previous Articles     Next Articles

Crystallization Process of Sodium Aluminate Enhanced by Ultrasonic Wave

SUN Wen-le ZHANG Yang, MA Shu-hua WANG Yue-jiao DING Jian TANG Zhen-hua ZHENG Shi-li   

  1. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, CAS Institute of Process Engineering, Chinese Academy of Sciences Key laboratory of Green Process and Engineering, Institute of Process Engineering, CAS (1. Key laboratory of Green Process and Engineering, Institute of Process Engineering, CAS Beijing University of Technology, Metallurgical and Ecological Engineering Institute of Process Engineering, Chinese Academy of Sciences
  • Received:2013-08-19 Revised:2013-10-08 Online:2013-12-20 Published:2013-12-20

超声波强化铝酸钠结晶工艺

孙文乐 张扬 马淑花 王月娇 丁健 唐振华 郑诗礼   

  1. 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室 中国科学院过程工程研究所 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室 北京科技大学冶金与生态工程学院 中国科学院过程工程研究所

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Abstract: The effects of ultrasonic frequency and power on the crystallization efficiency and morphology of sodium aluminate crystal were examined, and the optimum process conditions obtained: crystallization temperature 60℃, ultrasonic frequency 45 kHz and power 100 W. At these conditions, the crystalline product was monosodium aluminate hydrate (4NaAlO2×5H2O), the crystal morphology had flaky, eight-face, irregular and other forms. Ultrasound could significantly shorten the crystallization induction period by 66%, the conductivity of the solution increased 1.5 times, and the SiO2 concentration decreased to 5 g/L.

Key words: monosodium aluminate hydrate, crystallization, ultrasonic wave, conductivity

摘要： 实验考察了超声波强化铝酸钠结晶过程中超声波频率和功率对铝酸钠结晶和晶体形貌的影响，获得了超声波强化铝酸钠溶液结晶的最优工艺条件. 结果表明，超声波能显著强化铝酸钠结晶过程，在结晶温度60℃、超声频率45 kHz、功率100 W的最优工艺条件下，结晶产品为水合铝酸钠，分子式为4NaAlO2×5H2O，晶体随反应条件不同可呈现片状、八面体、无规则等多种形貌. 超声波作用使结晶诱导期缩短66%，溶液的电导率提高1.5倍，溶液中SiO2浓度降至5 g/L.

关键词: 水合铝酸钠, 结晶, 超声波, 电导率

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