Formation kinetics of Na2SnO3 from SnO2 and Na2CO3 roasted under CO-CO2 atmosphere

Q1 Earth and Planetary Sciences

International Journal of Mineral Processing Pub Date : 2017-08-10 DOI:10.1016/j.minpro.2017.06.002

Bingbing Liu, Yuanbo Zhang, Zijian Su, Guanghui Li, Tao Jiang

引用次数: 10

Abstract

A novel method for Na₂SnO₃ preparation from SnO₂ and Na₂CO₃ roasted under CO-CO₂ atmosphere in a solid state has been successfully developed. In this study, the formation kinetics of Na₂SnO₃ was investigated. The formation of Na₂SnO₃ was controlled by the first-order interfacial chemical reaction at 800 °C under 10 vol% CO content; as the temperature increased to 850 °C–900 °C, it was controlled by the three-dimension (Ginstling and Brounshtein) diffusion through the product layer at the early reaction stage. The rate constant increased with the increasing of temperature. Furthermore, the rate controlling characterizations of three-dimension diffusion were also discussed.

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SnO2和Na2CO3在CO-CO2气氛下焙烧生成Na2SnO3的动力学研究

研究了以SnO2和Na2CO3为原料，在CO-CO2气氛下以固态焙烧法制备Na2SnO3的新方法。本文研究了Na2SnO3的形成动力学。Na2SnO3的生成受一级界面化学反应控制，温度为800℃，CO含量为10 vol%;当温度升高到850℃- 900℃时，反应初期受产物层三维(Ginstling和bronshtein)扩散控制。速率常数随温度的升高而增大。此外，还讨论了三维扩散的速率控制特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Mineral Processing 工程技术-工程：化工

CiteScore

3.02

自引率

0.00%

发文量

审稿时长

11.1 months

期刊介绍： International Journal of Mineral Processing has been discontinued as of the end of 2017, due to the merger with Minerals Engineering. The International Journal of Mineral Processing covers aspects of the processing of mineral resources such as: Metallic and non-metallic ores, coals, and secondary resources. Topics dealt with include: Geometallurgy, comminution, sizing, classification (in air and water), gravity concentration, flotation, electric and magnetic separation, thickening, filtering, drying, and (bio)hydrometallurgy (when applied to low-grade raw materials), control and automation, waste treatment and disposal. In addition to research papers, the journal publishes review articles, technical notes, and letters to the editor..