Author: Rixiang MuPublisher:
ISBN:
Category :
Languages : en
Pages : 258
Book Description
Water Wetting Properties of Coal and Spectral Deconvolution
Some Properties of the Water in Coal
Author: Horace Chamberlain PorterPublisher:
ISBN:
Category : Coal
Languages : en
Pages : 30
Book Description
On the Possibility of Improving the Wettability of Coal by Water
Author: E. L. RauchvargerPublisher:
ISBN:
Category : Coal mines and mining
Languages : en
Pages : 12
Book Description
Some Properties of the Water I Coal (Classic Reprint)
Author: Horace C. PorterPublisher: Forgotten Books
ISBN: 9780666698285
Category : Science
Languages : en
Pages : 34
Book Description
Excerpt from Some Properties of the Water I Coal Different kinds of coal contain, in the air dried condition, widely different percentages of water. In other words, in order to produce a given aqueous vapor tension the different coals require different contents of so -called combined or inherent water. As ordinarily found in the market, coal, when superficially dry, con tains water; an Appalachian coal in this condition contains possibly 2 per cent of water, a middle-western or western bituminous coal, 6 to 10 per cent, and a subbituminous coal, 14 to 18 per cent. Even finely crushed or powdered coal does not become dry in ordinary air and requires an artificially and thoroughly dried atmosphere to remove all of its content of water. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Wetting Characteristics of Herrin Coal and Its Application for Improved Dust Control
Author: Durga Devika RelangiPublisher:
ISBN:
Category :
Languages : en
Pages : 214
Book Description
This thesis has developed wetting characteristics of coal dust from Herrin coal seam in Illinois for improved respirable coal and quartz dust control. Wetting characteristics were assessed by a wettability technique called Fixed Time Wettability (FTW) method which simulates the actual underground wetting environment. Immediate roof and immediate floor materials bulk samples were found to be 100% wettable by water alone, whereas coal seam samples were 55-90% wettable. Two variables: contact time between water droplets and dust particles and, the temperature of the water were found to affect the degree of wettability. FTW was carried out at as a function of water temperature (7.2°C to 40.5°C) and contact time (10 to 25 seconds) which increased wettability 2-18% and 8-32%, respectively. In addition, the wetted and un-wetted samples collected from wettability experiments were subjected to Scanning Electron Microscopy (SEM) and particle size distribution analyses. It was found that particles are irregular in shape in both wetted and un-wetted fractions and some agglomeration of fine particles was observed in a few un-wetted fraction samples. The concept of increased contact time was incorporated in engineering controls by increasing the wet scrubber filter screen inclination (which is a function of the screen surface area). The filter screen inclination was minimizing the pressure drop across it using Computational Fluid Dynamics (CFD) analysis. It was found that 60 degree (with respect to the vertical) would provide minimal pressure drop and should be considered for implementation. Additional research should be conducted on assessing selective wetting of different particle sizes of coal and quartz in airborne dust, developing data on wettability as a function of particle size and implementing the developed concepts such as contact time and temperature in the field for improved dust control.
Some Properties of the Water in Coal
Author: United States. Bureau of MinesPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publications of the National Institute of Standards and Technology ... Catalog
Author: National Institute of Standards and Technology (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 492
Book Description
Publications
Author: United States. National Bureau of StandardsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 492
Book Description
Energy Research Abstracts
Author: Publications of the National Bureau of Standards ... Catalog
Author: United States. National Bureau of StandardsPublisher:
ISBN:
Category :
Languages : en
Pages : 492
Book Description