By distilling bituminous coal in retorts to obtain gas for illumination, or by burning it in kilns or pits, the residue left behind is called coke, which is simply coal charcoal, and is nearly ...

Corsa released an update on its internal lab analysis that suggests the presence of PGMs in its coal refuse disposal material. According to a Corsa corporate report, a South African mineral research ...

As a by-product from the manufacture of gas and coke from coal, another one million tons were obtained. The quantity obtained from home-produced natural petroleum was only about two million tons.