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US 4,494,962 AGranted
Fuel product
OwnerGeorge M. Christie, James M. Holmesinventors
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Abstract
A coal fines log comprising a composite log made of a mixture of 90 to 98% coal particles having a size of roughly 10 microns, the log also containing paper and other cellulosic fibers such as bark in the range of 2 to 10% and grounded limestone is also provided in the log to neutralize the sulfur dioxide while burning. The log is contained in a hermetically sealed polyethylene envelope, the product so-formed is readily ignited and can sustain combustion over a relatively long period of time.
Claims2
A method of producing a composite fuel log comprising the steps of preparing a slurry of water and used newsprint paper fibers;
- grinding coal to a mesh size of between 10 microns and 3 mm;
- adding the coal particles to the slurry to a proportion of between 1% and 10% paper fibers and 90% to 98% coal particles;
- mixing the coal slurry;
- adding powdered limestone to the slurry in an amount of 1% to 10% by weight;
- pouring the slurry into an open ended mould;
- applying negative pressure at least to the open end of the mould to reduce the water content to at least 50% humidity;
- removing the so-formed log from the mould;
- and drying the log to reduce the moisture content below 30% humidity and placing the log in a hermetically sealed envelope.
5 more elements
Dependencies are inferred from the claim text.