Breakage Distribution Estimation of Bauxite Based on Piecewise Linearized Breakage Rate<sup>*</sup>

王晓丽; 桂卫华; 阳春华; 王雅琳

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Breakage Distribution Estimation of Bauxite Based on Piecewise Linearized Breakage Rate^*

Updated：2026-01-06

- Breakage Distribution Estimation of Bauxite Based on Piecewise Linearized Breakage Rate^*
- Chinese Journal of Chemical Engineering Vol. 20, Issue 6, Pages: 1198-1205(2012)
- Affiliations：
  
  School of Information Science and Engineering, Central South University,Changsha,China,410083
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- Published：2012
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[J]. Chinese Journal of Chemical Engineering, 2012, 20(6): 1198-1205.
DOI：

[J]. Chinese Journal of Chemical Engineering, 2012, 20(6): 1198-1205. DOI：

摘要

Abstract

Laboratory tests were carried out to study the breakage kinetics of diasporic bauxite and determine its breakage distribution function.Non-first order breakage with different deceleration rates for different size intervals is found

which is most probably caused by the heterogeneity of the ore.Piecewise linearization method is proposed to describe the non-first order breakage according to its characteristics.In the method

grinding time is divided into several intervals and breakage is assumed to be first order in each interval.So

the breakage rates are calculated by taking the product of the last interval as feed and then established as a function of particle size and grinding time.Based on the predetermined breakage rate function

the breakage distribution of the ore is back-calculated from the experimental data using the population balance model (PBM).Finally

the obtained breakage parameters are validated and the simulated data are in good agreement with the experimental data.The obtained breakage distribution and the method for breakage rate description are both significant for modeling the full scale ball milling process of bauxite.

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