US1557320A - Fuel briquette and process of making the same - Google Patents

Description

Patented a. 13,1925.

uurrw s'mrss 301m" 1'. ODONNELL, or MORRIS RUN, PENNSYLVANIA.

FUEL BRIQ UETTE AND PROCESS OF MAKING THE SAME.

no Drawing.

To allmihom it may concern:

Be it known that I, JonN F. ODoNNnLL, a citizen of the United States, and a resident of Morris Run, in the county of Tioga Y and State of Pennsylvania, have invented a jeet of the invention is to provide a briquette for fuel, made from grades of coal which ordinarily are low in volatile content, so that the briquettes form a high-grade fuel, smokeless, non-coking, quick to ignite and clean to handle.

Another object concerns the provision of a simple process whereby such briquettes can be quickly and economically manufactured.

lln general'the process includes the inixture of the finer grades of bituminous or anthracite coal in proper proportions with the dust coal of either or both forms. This mixture is placed in suitable molds and firmly packed down and then subjected for a short period of time to more or less definite temperatures, after which it is taken out of the molds and can be stored away for future use. 7

My inventionconcerns the mixture of semibituminous fine and dust coal and-authracite birdseye, barley and dust coal.

One preferred form of mixture would comprise per cent of a mixture of anthracite birdseye coal and anthracite dust coal thoroughly mixed with 50 per cent of a mixture of semibituminous line and dust coal. Preferably the semibituminous coal should have under 23 per cent volatile matter.

Any one of the mixtures above described, either all semibituminous or half anthracite and half semibituminous, preferably after being slightly moistened, can be placedin a metal container and firmly packed'down, said container being made of thin sheet metal capable of withstanding as high a temperature as 1200 F. for a period as long as ten minutes. The container may be divided, if desired, into pockets, each pocket the size and shape of the briquette desired. The container will have a top and bottom which can be assembled and, referably, the top isprovided with small holes to allow gas to escape durin the operation. The container is then p aced in any suitable Application filed April 12,4924. Serial No. 708,172.

furnace or chamber and subjected to temperatures which may range from 800 to 1200 F., depending upon the character of the mixture used. These briquettes will be thoroughly carbonized in from three to six minutes. After-the operation, the gas escaping through the apertures in the cover can be quickly extinguished by running a roller, preferably covered with some noncombustible material, over the vents or openings.

It has been found that in taking the raw coal and manufacturing it into carbonized briquettes the loss in weight will be very small, approximately not more than five per cent. In reference to moistening the coal, this is found to be generally preferable, especially in the case of semibituminous coal.

It will thus be observed that I can take a mixture of anthracite fine-grade coal. and mix it with approximately 50 per cent of anthracite dust coal and semibituminous dust coal and treat it in accordance with the above-mentioned process and get a highgrade briquette having the characteristics mentionedm On the other hand, I can take.

50 per cent seniibituminous line coal and mix it with 50 per cent semibituminous dust coal, slightly 'molstened, and sub ect the approximately fifty per cent proportions,

placing the mixture in a mold under pres sure, and subjecting the material to temperatures in the ncighborhooi'l of 1000 F. for from three to six minutes.

2. The process of producing a higlrgrade fuel briquette, which comprises mixing fifty per cent of fine anthracite coal of barley get a high-grade 'mixtureto the same process. Still further,

size with fifty per cent of a semibituminous dust coal and subjecting this mixture in a mold to pressure 1n a temperature of 1000 F. for several minutes.

JOHN F. UDONNELL.

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