Coal comminution and recovery process using gas drying

Details Coal comminution and recovery process using gas drying Coal comminution and recovery process using gas drying

1981-02-09

1983-08-23

Novosad, Stephen J.

Mining or in situ disintegration of hard material

In situ conversion of solid to fluid

Dissolving or chemical reaction

166259, 166307, 241 1, 241 18, 299 4, B02C 1900, E21C 4104

Patent

active

044000340

ABSTRACT:
This invention is a comminution process for treating coal with a drying gas to form fractures which weaken the structure of the coal and make it easier to disintegrate mechanically, chemically or by fluid force. Another aspect of this invention is a process for treating an underground formation of coal with a dry gas for a time sufficient to form cracks and fractures in a portion of the formation in order to increase the permeability of the coal formation to the flow of fluids therethrough. Processes for in-situ combustion of the coal formation are therefore more efficient since the coal formation is more permeable to the flow of gas therethrough.

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patent: 4191425 (1980-03-01), Davis
patent: 4239496 (1980-12-01), Cochran

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