Process for producing a solid, finely divided fuel based on coal
OwnerFriedrich H. Franke, Michael J. Paerschinventors
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Abstract
Water resistant coal briquettes are obtained by mixing finely divided coal with a first starchy binder in an amount of 0.5 to 3 wt % and with a second binder that contains molasses or fermented molasses (vinasse) and water in an amount of 1 to 4 wt %, and the green briquettes produced from this mixture are subjected to a heat treatment in at least two steps, whereby the green molded articles are first pretreated at 80.degree. to 150.degree. C. and optionally dried and then hardened at 200.degree. to 300.degree. C.
Claims6
A process for producing a substantially water resistant coal briquettes comprising:
- (a) heating a green molded coal briquette comprising a mixture of finely divided coal, a first binder containing starch in an amount of 0.5 to 3 wt% and a second binder comprising molasses and water in an amount of 1 to 4 wt% to a first temperature between 80.degree. C. to 150.degree. C. for a time sufficient to convert said starchy binder to a paste, and
- (b) heating said green molded coal briquette to a second temperature between 200.degree. C. to 300.degree. C. for a time sufficient to convert said green molded coal briquette into a substantially water resistant coal briquette.
A process for producing a substantially water resistant coal briquette comprising:
- (a) heating a green molded coal briquette comprising a mixture of finely divided coal, a first binder containing a starch that has been converted into a paste, and a second binder containing molasses and water to a temperature between about 200.degree. C. to 300 .degree. C. for a time sufficient to produce substantial water resistant coal briquette.
Dependencies are inferred from the claim text.