Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 17
Book Description
The development of an automated image analysis method to estimate pyrite particle liberation in crushed coal
Author: Validation of Image Analysis and Sample Pellet Preparation Methods for Estimating Pyrite Particle Size Distribution in Crushed Coals
Author: Gino A. IrdiDevelopment of an On-line Image Analysis for Assessment of Pyrite Liberation. Final Technical Report, 1 September, 1992--31 August, 1993
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 31
Book Description
The degree of pyrite liberation is a key to determine whether a batch of ground coal obtained through a grinding process is acceptable. Currently, the liberation analysis is conducted manually through a microscope with a commercial image analysis software. This procedure is very labor intensive and time consuming. As a result, an automation procedure based on the principles of image processing is proposed to perform the analysis of pyrite/minerals liberation of coal. To make the automated image analysis system possible, a data base of the light reflectance characteristics of different coal constituents must be established and implemented into a computer program. Characterization of coal images through the analysis of histograms has been conducted. To be specific, this research effort, during the past one year, has led to (1) the development of the flowchart of an on-line automated image analysis system, (2) the construction of an X-Y stage and the corresponding controlling software, (3) the development of rule based criteria from the image characteristics of coal particles, (4) the development of an image analysis computer software for analyzing coal particles without any human operator's intervention. The initial verification of this program has indicated that the automated image analysis process has met the proposed objectives.
Advanced Coal Preparation and Beyond
Author: S. Komar KawatraPublisher: CRC Press
ISBN: 1000763544
Category : Technology & Engineering
Languages : en
Pages : 572
Book Description
Updating content from the author’s 2001 book Coal Desulfurization, this new title focuses on CO2 sequestration and utilization. It includes information on the theory and practical approaches to CO2 capture and recent advances in the use of sequestered CO2. Avoiding these pollutants requires either forgetting about the 250 billion tons of coal reserves the United States possesses or capturing and utilizing the pollutants in a profitable and environmentally responsible fashion. The book covers postcombustion and precombustion capture approaches for coal, and postcombustion capture can be generalized to many other fuels. Recent practical implementations at full-scale power facilities around the world are discussed. The book covers sequestering CO2 via underground, oceanic, biological, and other long-term CO2 storage methods. It also includes recent advances in utilizing CO2 for enhanced oil recovery, advances in storage with depleted oil and gas reservoirs and deep saline aquifers, and additional topics. The book also examines specific applications of pure CO2 and covers chemical conversion of CO2 to useful compounds. It answers questions like "Can we create methanol from coal?" or "Can we create ethanol from coal?" It is found that methanol and ethanol cannot be sustainably produced from coal power alone. However, oxalic acid can be created at a much lower energy cost than methanol or ethanol. Oxalic acid can be used to extract rare earths, which are not currently produced anywhere in the United States, but are typically concentrated in coal ash. Aimed at researchers and industry professionals in chemical, environmental, and energy engineering, this book provides insight and inspiration into capturing CO2 not merely as a response to regulatory pressure and climate change but as an inherently profitable and valuable venture.
Coal Desulfurization
Author: S. K. KawatraPublisher: Taylor & Francis
ISBN: 9789056996963
Category : Science
Languages : en
Pages : 376
Book Description
This book was written to provide a comprehensive survey of the current state-of-the-art information in coal preparation, with particular emphasis on coal desulfrization. The primary audience for this book will be practising coal preparation engineers who need complete information about all of the coal preparation and desulphurization technologies that are available now, or that may be available in the future. It will also be valuable for coal researchers who need details and comparative data for cutting-edge technologies that are still under development. The main emphasis is on physical coal preparation, but chapters also include chemical and biological technologies that are under development, but not yet used in industrial practice. Along with the successful technologies, also included are details of processes and techniques that were attempted, but were subsequently abandoned, along with discussions of the reasons they were abandoned.
Energy Research Abstracts
Author: Development of an On-line Image Analysis for Assessment of Pyrite Liberation. Technical Report, December 1, 1992--February 28, 1993
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 24
Book Description
An automation procedure based on the principles of image processing is proposed to perform the analysis of pyrite/minerals liberation of coal. To make the automated image analysis system possible, a data base of the light reflectance characteristics of different coal constituents must be established. Characterization of coal images through the analysis of their histogram was conducted. In general, it was found that the distinction of coal particles or particle groups may be accomplished by determining the gray levels of zero pixel or by taking average gray level of each particle. In particular, when the gray level averaging is applied, the spread of gray levels of a given maceral becomes smaller. In other words, the spread in gray level among different maceral group becomes larger. This has led to a distinct boundary between different material group of coal. Two computer programs based on these findings are being developed. The implementation of these criteria will cover most of the coal samples that are previously analyzed. Consideration of special cases will require additional data analysis of histogram.
Coal Abstracts
Author: Automated Microscopy Methods for Measuring Pyritic Sulfur Content of Coal and Determining Degree of Liberation of Pyrite in Coal
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The objective of this project is to develop an automated procedure, to be implemented in an IBAS image analyzer, to determine size, shape and degree of liberation of pyrite particles in a coal matrix. This procedure is to work in real time conditions and with minimal intervention from the operator. Our approach is to create from the original microscopic image a three level image with the following components: epoxy, coal macerals and pyrite to simplify the calculations. Enhancing the original image by histogram scaling and median filtering, we segment it and form the three level image. After the boundaries of the pyrite particles are defined, we mask the surroundings of the particle to estimate the degree of liberation. The percentage of epoxy included in the mask is defined as the degree of liberation of the particle. Size and shape factor values are simultaneously calculated for each of the analyzed particles. These particles are classified according to their maximum diameter, shape factor and degree of liberation by the program. 6 refs., 18 figs.
A Microscope System Using Automated Reflectance Scanning to Study Coal Components
Author: James Thomas McCartneyPublisher:
ISBN:
Category : Coal
Languages : en
Pages : 24
Book Description