在线矿浆品位分析仪的设计与现场应用

发布时间：2019-04-08 15:59

【摘要】：钢铁是国民经济的基础,钢铁产量是衡量一个国家工业发展程度的主要标志。冶炼钢铁离不开选矿,选矿厂铁精粉的质量和产量是决定钢铁产量的决定性因素。没有足够的铁精粉,不可能炼出大量的钢铁。生产出的铁精粉矿浆的品位太低,就会造成大量的产品不合格；矿浆产品的品位太高,选出的产品数量太少,又会使产量大大降低。所以关键位置全铁品位的监测至关重要。选矿厂生产过程矿浆的铁品位是选矿工艺中需要控制的主要技术参数。射线检测技术在进行物质组分分析中具有其独特的优势,在工作中尝试采用双能量Y射线吸收技术进行铁矿浆品位在线分析。首先,通过理论分析研究射线与物质之间的相互作用,建立铁矿浆品位测量的数学模型,设计出合适测量的测量装置。然后,将品位仪应用于工业现场进行标定,得到大量的基础数据,对数据进行深入分析,找出规律,总结出适合现场应用的标定方法。最后,对品位仪的现场应用情况进行总结,针对仪表存在的问题进行完善和升级,提高品位仪适应现场的能力。通过对品位仪的现场标定,其对铁品位的检测精度达到±0.5%(1δ),可满足于选矿厂对矿浆品位的精度要求；通过对大量的现场数据进行分析,总结出一套适合现场的标定技巧,使现场调试标定更加简单,维护更加方便；通过对品位仪的完善和升级,品位仪的适应性得到了大幅度提升,可以适应不同的选矿工艺,为实时调节生产提供依据。经过不断的改进和完善,矿浆品位仪已经从实验产品发展成为用户可信赖的产品。矿浆品位仪能够满足选矿行业的需要,解决了其在生产过程中遇到的铁品位化验结果不及时的实际难题。同时也是一款具有自主知识产权,价格适中的在线品位分析仪器,利于在选矿厂进行推广。目前品位仪还没有与选矿自动化相结合,参与自动控制,随着矿山自动化的不断发展和矿浆品位仪的不断完善升级,品位仪参与选矿厂闭环控制这个目标一定可以实现。
[Abstract]:Iron and steel is the basis of national economy, and the output of iron and steel is the main symbol to measure the degree of industrial development of a country. The quality and output of fine iron powder in concentrator are the decisive factors to determine the output of iron and steel. Without enough iron powder, it is impossible to produce a great deal of steel. If the grade of the iron concentrate pulp produced is too low, a large number of products will not be qualified, the grade of the pulp product is too high, the quantity of the selected product is too little, and the output will be greatly reduced. Therefore, the monitoring of all-iron grade at the key position is very important. The iron grade of ore pulp in the production process of concentrator is the main technical parameter which needs to be controlled in the process of mineral processing. X-ray detection technology has its unique advantages in material composition analysis. In the work, dual-energy Y-ray absorption technique is used for on-line grade analysis of iron ore slurry. Firstly, through the theoretical analysis of the interaction between ray and matter, the mathematical model of grade measurement of iron ore slurry is established, and a suitable measuring device is designed. Then, the product level meter is used to calibrate the industrial site, and a large number of basic data are obtained. The data is analyzed deeply, the rule is found out, and the calibration method suitable for the field application is summarized. Finally, the field application of the level meter is summarized, and the problems existing in the meter are improved and upgraded, so as to improve the adaptability of the level meter to the field. The precision of iron grade detection is 卤0.5% (1 未), which can meet the precision requirement of ore pulp grade in concentrator by calibrating the grade meter on the spot. The precision of the grade of iron is up to 卤0.5% (1 未). Through the analysis of a large number of field data, a set of calibration techniques suitable for the site is summarized, which makes the field debugging and calibration simpler and the maintenance more convenient. Through the improvement and upgrading of the product level meter, the adaptability of the product level meter has been greatly improved, which can adapt to different mineral processing processes and provide the basis for real-time adjustment of production. After continuous improvement and perfection, pulp level meter has been developed from experimental products to reliable products. The pulp level meter can meet the needs of mineral processing industry and solve the practical problem that the iron grade test results encountered in the production process are not timely. At the same time, it is also an on-line grade analysis instrument with independent intellectual property right and moderate price, which is beneficial to popularize in concentrator. At present, the grade meter has not been combined with mineral processing automation to participate in automatic control. With the continuous development of mine automation and the continuous improvement and upgrading of pulp level meter, the goal of grade meter participating in closed-loop control of concentrator can be achieved.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TD463;TD928.9

【参考文献】