在线式激光矿浆粒度仪的研究与开发
发布时间：2018-08-06 20:52
【摘要】：矿浆粒度是选矿生产的重要经济参数,但矿浆粒度的在线检测一直是摆在研究人员面前的难题之一。要想保证产品的质量并且优化控制,就必须实现在线粒度的检测,这样才能使得整个生产过程实现闭环控制。在对各种颗粒粒度分布测量方法比较之后发现测量矿浆粒度分布的最佳方法是激光粒度测量法。传统的激光粒度仪存在的主要问题是成本较高和不利于在线检测,为解决这两个问题,在这里设计了一种基于双色激光的磨矿粒度在线分析仪。研究工作如下:首先介绍了粒度分布等相关概念,对米氏散射理论和激光粒度仪的测量原理进行了深入研究;第二,设计了矿浆粒度仪总体结构,包括发射单元,光学系统,接收单元和信号处理与控制单元,并给出了具体的软硬件设计方案,利用MSP430F149单片机驱动线阵型CCD并采集处理CCD产生的光生电信号,设计了显示电路,通讯电路和电源电路等;第三,研究了粒度分布反演算法,即约束算法和非约束算法,并对两种算法进行了比较总结,提出了一种改进的针对矿浆粒度分布测量的约束算法;最后搭建了简单的实验平台,对1~100um矿粉进行了实验测试并对粒度分布结果进行了分析。通过研究,完成了基于双色激光的磨矿粒度在线分析仪的理论和实验研究。实验表明,采用线阵型CCD作为矿浆粒度仪的光电探测器并利用单片机对采集数据进行处理是可行的,满足了磨矿生产对矿浆粒度分布测量的需要。
[Abstract]:Slurry granularity is an important economic parameter in mineral processing, but on-line detection of slurry granularity is one of the difficult problems in front of researchers. In order to ensure the quality of the product and optimize the control, it is necessary to realize the on-line granularity detection, so that the whole production process can be controlled by closed loop. After comparing various particle size distribution measurement methods, it is found that laser particle size measurement is the best method for measuring slurry particle size distribution. The main problems of traditional laser granulometer are high cost and unfavorable to on-line detection. In order to solve these two problems, an on-line analyzer of grinding granularity based on two-color laser is designed. The research work is as follows: firstly, the related concepts, such as particle size distribution, are introduced, and the theory of Michelson scattering and the measurement principle of laser particle size meter are deeply studied. Secondly, the overall structure of slurry granularity meter is designed, including emitter unit, optical system, and so on. The receiving unit and the signal processing and control unit, and the specific hardware and software design scheme are given. The display circuit, communication circuit and power supply circuit are designed by using the MSP430F149 single-chip microcomputer to drive the line formation CCD and to collect and process the photogenerated electrical signals generated by CCD. Thirdly, the granularity distribution inversion algorithm, namely, the constrained algorithm and the unconstrained algorithm, are studied, and the two algorithms are compared and summarized, and an improved constraint algorithm for the measurement of slurry granularity distribution is proposed. Finally, a simple experimental platform was set up, the 1~100um ore powder was tested and the particle size distribution results were analyzed. The theoretical and experimental research of grinding particle size analyzer based on two-color laser is completed. The experimental results show that it is feasible to use linear matrix CCD as the photoelectric detector of slurry granularity meter and to process the collected data by single chip computer, which meets the needs of grinding production for the measurement of slurry particle size distribution.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD45
本文编号：2168951
[Abstract]:Slurry granularity is an important economic parameter in mineral processing, but on-line detection of slurry granularity is one of the difficult problems in front of researchers. In order to ensure the quality of the product and optimize the control, it is necessary to realize the on-line granularity detection, so that the whole production process can be controlled by closed loop. After comparing various particle size distribution measurement methods, it is found that laser particle size measurement is the best method for measuring slurry particle size distribution. The main problems of traditional laser granulometer are high cost and unfavorable to on-line detection. In order to solve these two problems, an on-line analyzer of grinding granularity based on two-color laser is designed. The research work is as follows: firstly, the related concepts, such as particle size distribution, are introduced, and the theory of Michelson scattering and the measurement principle of laser particle size meter are deeply studied. Secondly, the overall structure of slurry granularity meter is designed, including emitter unit, optical system, and so on. The receiving unit and the signal processing and control unit, and the specific hardware and software design scheme are given. The display circuit, communication circuit and power supply circuit are designed by using the MSP430F149 single-chip microcomputer to drive the line formation CCD and to collect and process the photogenerated electrical signals generated by CCD. Thirdly, the granularity distribution inversion algorithm, namely, the constrained algorithm and the unconstrained algorithm, are studied, and the two algorithms are compared and summarized, and an improved constraint algorithm for the measurement of slurry granularity distribution is proposed. Finally, a simple experimental platform was set up, the 1~100um ore powder was tested and the particle size distribution results were analyzed. The theoretical and experimental research of grinding particle size analyzer based on two-color laser is completed. The experimental results show that it is feasible to use linear matrix CCD as the photoelectric detector of slurry granularity meter and to process the collected data by single chip computer, which meets the needs of grinding production for the measurement of slurry particle size distribution.
【学位授予单位】：华北理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD45
【参考文献】
相关博士学位论文 前1条
1 张启兴;火灾烟雾颗粒散射矩阵模拟测量与粒径折射率反演研究[D];中国科学技术大学;2011年
，本文编号：2168951
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