基于微米CT的磨介对产物三维形貌影响实验设计

谢卫宁; 林生茂; 王帅; 冯芝勇

doi:10.15953/j.ctta.2023.182

基于微米CT的磨介对产物三维形貌影响实验设计

谢卫宁^{1, 2, ,},
林生茂²,
王帅¹,
冯芝勇³

1.
中国矿业大学现代分析与计算中心，江苏徐州221116
2.
中国矿业大学化工学院，江苏徐州221116
3.
JTRI-浩通新材料联创中心，江苏徐州221116

基金项目: 国家自然科学基金（基于物相识别定量的中速磨煤机煤炭混合破碎机理研究（51904295））；中国矿业大学集萃研究生教育教学改革专项（基于分析技术与工程引领融合的工科研究生实践创新能力培养机制研究（2023JCJG009））。

详细信息

通讯作者:
谢卫宁: 男，博士，中国矿业大学现代分析与计算中心高级实验师、硕士生导师，主要从事无损检测与三维体数据分析，以及痕量元素定量分析等方面研究，E-mail: 5718@cumt.edu.cn。

中图分类号: TP 391.41
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出版历程
- 收稿日期: 2023-09-17
- 修回日期: 2023-12-27
- 录用日期: 2024-01-15
- 网络出版日期: 2024-01-30
- 刊出日期: 2024-05-12

Experimental Design of Effect of Grinding Media on Three-Dimensional Morphology of Products Based on Micro-CT

1.
Advanced Analysis & Computation Center, China University of Mining and Technology, Xuzhou 221116, China
2.
School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, China
3.
JTRI Haotong New Materials Joint Innovation Center, Xuzhou 221116, China

摘要

摘要:
本文设计研究球形和六棱柱形研磨介质对煤炭破碎产物三维形貌特征影响的实验，具体过程包括不同时间批次煤炭破碎和筛分，基于高分辨三维X射线显微成像系统的粗粒级煤炭无损检测以及基于Dragonfly三维数据分析软件的完整颗粒分割提取和三维形貌特征参数计算等环节。结果显示：在球磨机转速率较低的前提下，钢球和钢锻的总表面积或总质量相同时，钢球作用下物料的初始粒级破碎速率略高于钢锻，且-1 mm细粒级产率最高。研磨作用促使粗粒级物料的体积和表面积降低，3种研磨条件下表面积最大的钢锻对样品的“磨剥”作用最为明显，颗粒球形度最高。
- 微米CT /
- 三维数据分析 /
- 破碎 /
- 实验设计
Abstract:
Grinding experiments of coal are designed to study the influence of spherical and cylindrical media on the three-dimensional morphology characteristics of grinding products. Details of experiments consist of coal grinding, screening of grinding produces, non-destructive testing of coarse-grained coal based on high-resolution three-dimensional X-ray microscopic imaging system, and particle segmentation extraction and three-dimensional morphology feature parameter calculation based on the Dragonfly software. For the low rotation rate condition of the ball mill, if the total surface area or total mass of grinding media is the same, breakage rate of the top size particles ground by the grinding ball is higher than that of the cylindrical media. Moreover, the yield of −1 mm fines yielded by the ball is the highest. The grinding effect reduces the volume and surface area of coarse materials. For the three grinding conditions, the steel cylindrical media with the largest surface area has a more significant “grinding and stripping” effect on coal and the highest particle sphericity.
- mirco-CT /
- analysis of three-dimensional data /
- grinding /
- experimental design

HTML全文

图 1 本实验流程

Figure 1. Flowsheet of the experimental study

下载: 全尺寸图片幻灯片

图 2 实验样品置于蔡司Xradia 510 Versa系统内部情况

Figure 2. Placement of experimental samples inside the Xradia 510 Versa system

下载: 全尺寸图片幻灯片

图 3 不同研磨条件下初始粒级物料产率随时间变化

Figure 3. Changes in the breakage rate of initial particles over time under various grinding conditions

下载: 全尺寸图片幻灯片

图 4 不同研磨条件下-1 mm粒级物料产率随时间变化

Figure 4. Changes in the yield of -1 mm particles over time under various grinding conditions

下载: 全尺寸图片幻灯片

图 5 利用Dragonfly中分水岭算法处理颗粒群CT图像过程

Figure 5. Treatment on micro-CT images using the watershed algorithm in Dragonfly

下载: 全尺寸图片幻灯片

图 6 利用Dragonfly去除CT图像中非完整颗粒过程

Figure 6. Removal of incomplete particles in micro-CT images using Dragonfly

下载: 全尺寸图片幻灯片

图 7 Dragonfly软件提取的代表性颗粒三维图

Figure 7. 3D images of representative particles extracted using Dragonfly

下载: 全尺寸图片幻灯片

表 1 原煤及不同破碎条件下颗粒的体积、表面积和球形度

Table 1 Volume, surface area, and degree of sphericity of raw coal and particles under various grinding conditions

样品	代表性颗粒编号	体积/mm³	表面积/mm²	球形度
原煤		50.20	18.00	0.6029
钢球60 s	a	45.27	14.15	0.6268
钢球120 s	b	35.73	12.26	0.7205
等质量钢锻60 s	c	43.58	13.79	0.6408
等质量钢锻120 s	d	31.73	11.26	0.7546
等表面积钢锻60 s	e	47.58	15.13	0.6304
等表面积钢锻120 s	f	38.73	13.05	0.6973
注：体积、表面积和球形度均为统计后的平均数据。

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