Assessment of dual-energy X-ray transmission image analysis process on sulphide ore and coal cases
department or school: Applied Science, Faculty of
department or school: Mining Engineering, Keevil Institute of
data provider: DSpace
degree campus: UBCV
creator: Zhang, Yi Ran
issued: 2023-04-24T19:12:22Z
issued: 2023
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Dual Energy X-ray Transmission (DE-XRT) technology has been widely used for hard rock ore sorting as well as for coal beneficiation purposes. Although there is an abundance of publications on research conducted using the DE-XRT system, there is a very limited number of publications discussing how the results are generated from the raw X-ray signal responses. Since the relative density values generated from the raw X-ray images could potentially alter the final DE-XRT result, it is important to study the image processing methods used to produce the relative density from raw X-ray images. In this thesis, the two known methodologies, the single curve method and dual material decomposition method (the name is used interchangeably with “dual curve method” in this study) were discussed and compared in two studies: a sulphide classification and sortability study (case 1) and a coal washability study (case 2). This thesis also attempts to use a more mathematical approach that takes into account all pixel values of the studied samples. In both case studies, the calibration curves used in single and dual curve methods are generated by evaluating the high and low pixel intensities on the H-L graph. The two sets of relative density results generated from the single curve and dual curve method are used to compare with the equivalent gold assay grades to classify rocks and perform sortability analysis in case 1. In case 2 they are used to compare with ash content and specific gravity (S.G.) plots to develop washability correlations. The results for case 1 show nearly identical performance on sulphide classification and sortability studies between the single curve and dual curve methods with the dual curve method slightly outperforming the single curve method. However, the DE-XRT results generated from both methods were not able to perform effectively “equivalent gold-grade” prediction. In case 2, although the dual material decomposition method outperformed the single curve method…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/84457
note: ASSESSMENT OF DUAL-ENERGY X-RAY TRANSMISSION IMAGE ANALYSIS PROCESS ON SULPHIDE ORE AND COAL CASES by Yi Ran Zhang B.A.Sc., The University of British Columbia, 2016 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Mining Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) April 2023 © Yi Ran Zhang, 2023 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, the thesis entitled: Assessment of Dual-Energy X-Ray Transmission Image Analysis Process on Sulphide Ore and Coal Cases submitted by Yi Ran Zhang in partial fulfilment of the requirements for the degree of Masters of Applied Science in Mining Engineering Examining Committee: Dr. Maria E. Holuszko, Associate Professor, Mining Engineering, UBC Supervisor Dr. Bern Klein, Professor, Mining Engineering, UBC Supervisory Committee Member Dr. Marek Pawlik, Professor, Mining Engineering, UBC Supervisory Committee Member iii Abstract Dual Energy X-ray Transmission (DE-XRT) technology has been widely used for hard rock ore sorting as well as for coal beneficiation purposes. Although there is an abundance of publications on research conducted using the DE-XRT system, there is a very limited number of publications discussing how the results are generated from the raw X-ray signal responses. Since the relative density values generated from the raw X-ray images could potentially alter the final DE-XRT result, it is important to study the image processing methods used to produce the relative density from raw X-ray images. In this thesis, the two known methodologies, the single curve method and dual material decomposition method (the name is used interchangeably with “dual curve method” in this study) were discussed and compared in two studies: a sulphide classification and sortability study (case 1) and a coal washability study (…
has type: Thesis/Dissertation
date issued: 2023-05
is shown at: 10.14288/1.0431384
language: eng
degree discipline: Mining Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Holuszko, M. E.
type: Text
type: Still Image
identifier URI: http://hdl.handle.net/2429/84457