| (19) |
 |
|
(11) |
EP 0 120 499 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
02.10.1985 Bulletin 1985/40 |
| (43) |
Date of publication A2: |
|
03.10.1984 Bulletin 1984/40 |
| (22) |
Date of filing: 27.03.1984 |
|
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
28.03.1983 AU 864883
|
| (71) |
Applicant: JAPAN AUSTRALIA PROCESS COAL COMPANY |
|
() |
|
| (72) |
Inventors: |
|
- Lloyd, Robert
()
- Turner, Maxwell James
()
|
|
| |
|
| (54) |
Method for the removal of iron pyrites from coal and carbon structures during ash
removal by chemical means |
(57) The invention relates to a method for the removal of iron pyrites from coal and carbon
structures during ash removal by chemical means. The method includes crushing raw
coals to a proper particle size, leaching said crushed coals with hydrofluoric acid,
and separating said leached solids.