By D.V. Subba Rao, T. Gouricharan
This publication is a right away outgrowth of sessions that the authors gave over a interval of 3 many years to a college viewers taking a Mineral Beneficiation path as a huge that integrated coal processing and usage. it's designed for use as a student’s (or layman’s) first creation to coal processing and usage, motivating the techniques earlier than illustrating them via concrete occasions. As such, this ebook supplies an built-in review of coal processing and usage in addition to fresh coal know-how, providing all of the easy ideas, conception and perform in a scientific approach. each subject lined is handled in a self-explanatory demeanour in order that any new reader may well locate this ebook fascinating and straightforward to appreciate.
The e-book makes on hand the tough middle of basics of coal processing and usage in a kind that is common adequate to fulfill the desires of many and but is unburdened by way of extra luggage top mentioned in examine journals. The salient characteristic is that each one the technical terminology utilized in this e-book has been sufficiently defined which will enable the
reader to appreciate the ideas successfully with no need to refer to extra literature.
Problems are brought now not quite a bit to be solved as to be tackled. a few of them are integrated to put the floor paintings for the next conception and may support the readers in instructing, examine and working vegetation. total, this publication could be of curiosity to pros and engineers within the fields of power, mining, mineral, metallurgical and geological engineering, in addition to to engineering geologists and earth sciences professionals.
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Additional info for Coal processing and utilization
Other constituents identified are carbonates, sulphides, oxides, chlorides and sulphates. 3 shows coal minerals and their frequency of occurrence. When coal burns, shale and other hydrated minerals lose water of hydration while sulphides, sulphates and carbonates usually decompose, resulting in loss of weight, hence the ash of coal is always less than the mineral matter content. Sulphur occurs in coal in three forms. It is present in organic combination as part of the coal substance, as pyrites or marcasite, and as sulfates.
This is true because theoretically all extraneous mineral matter can be removed. The extraneous mineral matter is due to the substances which got associated with the decaying vegetable material during its conversion into coal, and also due to the rocks and dirt getting mixed up during mining and handling of coal. The former of extraneous mineral matter is in a fine state and intimately associated with the organic mass of coal. Hence difficulties are experienced in removing this from coal by mechanical methods.
The second type of extraneous mineral matter is more amenable to coal cleaning methods. The major portion of mineral matter of commercial coal is extraneous. In Indian coals, the mineral matter content is not only high but is of intimately associated due to the drift origin. The bulk of the mineral matter of coal is due to clay or shale consisting of alumino-silicates of different composition. Other constituents identified are carbonates, sulphides, oxides, chlorides and sulphates. 3 shows coal minerals and their frequency of occurrence.