Method for manufacturing briquetted solid fuel using porous coal as starting material
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United States of America Patent
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Sep 3, 2013
Grant Date -
Nov 22, 2012
app pub date -
Oct 9, 2009
filing date -
Oct 14, 2008
priority date (Note) -
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Abstract
Provided is a manufacturing method for a briquetted solid fuel that can reduce the briquetting cost while maintaining the strength of the briquetted product. A mixed oil that includes a heavy oil and a solvent oil, and a porous coal are mixed to obtain a slurry. The slurry is dewatered by heating to obtain a dewatered slurry. Solvent oil is separated from the dewatered slurry to obtain a cake, the cake is heated, and solvent oil is further separated from the cake to obtain a modified coal. Moisture is added to the modified coal to obtain a moist modified coal with a moisture content of 3 wt % to 10 wt %, and then the moist modified coal is briquetted under pressure.
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