Fuel and related compositions – Liquid fuels – Aluminum or heavy metal – other than lead – containing
Patent
1985-04-15
1987-04-28
Reese, Randolph A.
Fuel and related compositions
Liquid fuels
Aluminum or heavy metal, other than lead, containing
75 7, 201 17, 209 8, 209 11, 423152, 423154, C22B 111, C01G 4908, B03C 100
Patent
active
046611185
ABSTRACT:
A method for increasing the magnetization of pyrite-containing pulverized coal comprises heating the coal in an atmosphere of inert gas, desirably nitrogen, containing 3 to 60 torr, preferably 12 to 16 torr, partial pressure of air to a temperature in the range 390.degree. to 455.degree. C., desirably 400.degree. to 410.degree. C., for a time sufficient, preferably 2 minutes to 2 hours, for converting enough pyrite to magnetite to allow separation of at least 50% by weight of the pyrite from the coal in a low-strength magnetic field. The sulfur content of coal treated in accordance with this method can be reduced by subjecting the treated coal to a low-strength magnetic field for moving at least 50% by weight of the pyrite from the coal although a smaller fraction, about 5 to 25%, of the pyrite is actually converted to magnetite.
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Alexander Corrinne C.
Senftle Frank E.
Thorpe Arthur N.
Koltos E. Philip
Reese Randolph A.
The United States of America as represented by the Secretary of
Wacyra Edward M.
Zack Thomas
LandOfFree
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