单个粗颗粒矿石自由沉降速度和浮游速度试验研究

发布时间：2018-07-10 12:28

本文选题：粗颗粒铜矿石 + 自由沉降速度　；参考：《昆明理工大学》2017年硕士论文

【摘要】：单个粗颗粒矿石在流体中的自由沉降速度和浮游速度直接关系到深部开采粗颗粒矿石垂直管道水力提升速度的确定,同时,也为后续研究矿石颗粒群的沉降速度和浮游速度提供一定的理论基础,因此,本文先深入的研究探索单个粗颗粒矿石在流体中的自由沉降运动和浮游运动的力学运动特性规律。本文试验所采用的粗颗粒矿石来自普朗铜矿,铜矿石经过粗碎、中碎和细碎后筛分得到的。本文以试验研究方法为主,首先采用“比重瓶法”对2～4mm、4～5mm和5～6mm三种不同粒径以及块状、柱状、片状和锥状四种不同形状共360个粗颗粒铜矿石进行密度测定,再使用数显游标卡尺对所有试验颗粒进行三维几何尺寸进行测量,获得粗颗粒铜矿石的形状系数和几何粒径,然后对所有试验颗粒进行自由沉降试验和浮游试验,并利用视频图像处理技术获得单个粗颗粒铜矿石的自由沉降速度值和浮游速度值。为了保证试验数据的准确可靠,在对试验数据分析处理前,本文首先利用Minitab数学统计软件对所有的试验数据进行正态性检验和奇异值检验,检验试验数据的标准差是否保证在10%以内以及试验数据中是否存在奇异值,剔除所有试验数据的奇异值外,最终得到287个精确可靠的粗颗粒铜矿石试验数据值。对这287个不同形状、不同粒径和不同密度的粗颗粒铜矿石的自由沉降速度和浮游速度值进行数据统计分析,给出了单个粗颗粒铜矿石的自由沉降速度和浮游速度的经验计算公式。自由沉降速度经验计算公式:浮游速度经验计算公式:最后通过40个4～5mm和5～6mm不同形状与不同粒径的粗颗粒铜矿石自由沉降试验和浮游试验,对单个粗颗粒铜矿石的自由沉降速度和浮游速度的经验计算公式进行了验证,证明了本文所给出的单个粗颗粒铜矿石的自由沉降速度和浮游速度的经验计算公式在实际工程领域应用中是精确可靠的。
[Abstract]:The free settling velocity and floating velocity of a single coarse particle ore in fluid are directly related to the determination of hydraulic lifting speed of vertical pipeline in deep mining coarse-grained ore, at the same time, It also provides a theoretical basis for the further study of the settlement velocity and the floating velocity of the ore particle group. Therefore, in this paper, the characteristics of the free subsidence and the floating motion of a single coarse ore in the fluid are studied in depth. The coarse-grained ore used in this paper comes from Plang Copper Mine, and the copper ore is sifted through coarse, medium and fine crushing. In this paper, the test method is used to measure the density of 360 coarse grained copper ores of four shapes, I. e., 2mm, 4mm, 4mm and 5mm and 5~6mm, and four shapes, I. e., block, columnar, flake and conical, by using the method of "specific gravity bottle", which is mainly used to measure the density of three kinds of coarse grained copper ores. Then the three-dimensional geometric size of all the tested particles is measured by using the digital display caliper to obtain the shape coefficient and geometric particle size of the coarse particle copper ore, and then the free subsidence test and the floating test of all the test particles are carried out. The free subsidence velocity and float velocity of single coarse copper ore were obtained by video image processing. In order to ensure the accuracy and reliability of the test data, before analyzing and processing the test data, this paper first uses Minitab mathematical statistics software to test all the test data for normality test and singular value test. Whether the standard deviation of test data is within 10% or not and whether there are singular values in the test data, 287 accurate and reliable test data of coarse copper ore are obtained after all the singular values of test data are excluded. The free subsidence velocity and floating velocity of these 287 coarse copper ores with different shapes, different particle sizes and different densities are statistically analyzed. The empirical formulas of free subsidence velocity and floating velocity of a single coarse copper ore are given. The empirical formula of free settlement velocity: the empirical formula of floating velocity: finally, through 40 4~5mm and 5~6mm different shapes and different diameter of coarse copper ore free settlement test and floating test, The empirical formulas of free subsidence velocity and floating velocity of a single coarse-grained copper ore are verified. It is proved that the empirical formula of free subsidence velocity and floating velocity of a single coarse-grained copper ore given in this paper is accurate and reliable in practical engineering application.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD923;TD952

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