具有复杂非一阶破碎特性的铝土矿球磨过程建模与粒度分布预测方法研究

项目名称： 具有复杂非一阶破碎特性的铝土矿球磨过程建模与粒度分布预测方法研究

项目编号： No.61273187

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 王雅琳

作者单位： 中南大学

项目金额： 81万元

中文摘要： 选矿拜耳法为我国首创，是处理占我国80%铝资源的难处理铝土矿的有效方法。铝土矿球磨是该法生产的重要环节，其产品粒度及其分布直接关系到整个流程的经济技术指标。因矿物非均质，铝土矿表现出复杂非一阶破碎动力学特性，现有磨矿模型和仿真软件以一阶特性为基础，不能真实反映其产品粒度分布，导致过程控制盲目，生产波动大、能源资源浪费严重。为此，本项目拟在基于半监督聚类的铝土矿可磨度分类基础上，结合分批磨矿实验，分析异类非均质铝土矿非一阶破碎特性，给出统一描述形式；提出非一阶破碎特性下低求解复杂度的铝土矿破碎分布函数确定方法、基于有限可用信息的停留时间分布在线预估方法以及融合机理和数据的非一阶连续破碎速率函数一体化建模方法，建立非一阶连续磨矿总体平衡模型；采用模型多尺度修正方法，实现产品粒度分布准确预测；为铝土矿球磨过程精细化控制和节能降耗提供源头创新，并为其他具有非一阶破碎特性的磨矿过程建模仿真提供借鉴。

中文关键词： 非一阶破碎；非均质；粒度分布预测；铝土矿球磨过程；一体化建模

英文摘要： Bayer process with dressing, developed initiatively in China, is an effective method to deal with the diasporic bauxite which is difficult to handle and takes up 80% of the aluminum minerals in China. Ball milling process of bauxite is an important part in the process, and its product's particle size and size distribution are directly related to the economic and technical index of the whole process. For the non-homogeneity of the minerals, the diasporic bauxite presents the complex non-first order breakage dynamic characteristics. The existing grinding model and simulation software developed based on first-order breakage are not adequate to truly reflect its particle size distribution, which results in the blindness in process control, the large process fluctuation and the serious energy and resource waste. Therefore, this project aims to conduct the following research to provide original innovations for the energy saving and cost reducing as well as the precise control of the ball milling process of bauxite and inspire the modeling and simulation of other grinding process with non-first order breakage: first, analyze the non-first order breakage of heterogeneous and non-homogeneity bauxite based on the grindability partition of ores using semi-supervised clustering and the batch grinding experiments, and propos

英文关键词： non-first order breakage；non-homogeneity；particle size distribution prediction；ball milling process of bauxite；integrated modeling