JPS57139188A - Stepwise preparation of deashed coal - Google Patents
Stepwise preparation of deashed coalInfo
- Publication number
- JPS57139188A JPS57139188A JP2473281A JP2473281A JPS57139188A JP S57139188 A JPS57139188 A JP S57139188A JP 2473281 A JP2473281 A JP 2473281A JP 2473281 A JP2473281 A JP 2473281A JP S57139188 A JPS57139188 A JP S57139188A
- Authority
- JP
- Japan
- Prior art keywords
- seed
- pulverized coal
- low
- coal
- deashed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
PURPOSE: To efficiently prepare deashed coals different in deashing degrees from each other, by treating a slurry of ash-contg. pulverized coal stepwise with on insufficient amt. of a low-boiling oil, using a seed.
CONSTITUTION: 1st step deashing: a pulverized coal slurry, a seed such as a hard vinyl chloride resin grannule of particle size of several mm and 5W10wt%, based on the pulverized coal, low-boiling oil such as kerosine or gasoline are mixed, agitated and granulated. Then a granule consisting of the pulverized coal, the low-boiling oil and the seed is separated and washed, which a slurry contg. ungranulated pulverized coal and ash is discharged. Then the low-boiling oil and water are separated by heating the granule, and then the seed is separated to obtain a deashed coal. The low-boiling oil and the seed are recycled for use. 2nd step deashing: the slurry obtd. in the 1st step, contg. the ungranulated pulverized coal and ash is subjected to the same treatment as in the 1st step to obtain a deashed coal of a somewhat lower deashing degree than the deashed coal obtd. at the 1st step.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2473281A JPS57139188A (en) | 1981-02-20 | 1981-02-20 | Stepwise preparation of deashed coal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2473281A JPS57139188A (en) | 1981-02-20 | 1981-02-20 | Stepwise preparation of deashed coal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57139188A true JPS57139188A (en) | 1982-08-27 |
JPS6258398B2 JPS6258398B2 (en) | 1987-12-05 |
Family
ID=12146318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2473281A Granted JPS57139188A (en) | 1981-02-20 | 1981-02-20 | Stepwise preparation of deashed coal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57139188A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03240699A (en) * | 1990-02-15 | 1991-10-28 | Nippon Sutando Service Kk | Vapor recovering device |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3665066A (en) * | 1969-11-28 | 1972-05-23 | Canadian Patents Dev | Beneficiation of coals |
JPS5370076A (en) * | 1976-12-03 | 1978-06-22 | Shell Int Research | Method of aggregating coal powder |
JPS564692A (en) * | 1979-06-19 | 1981-01-19 | Atlantic Richfield Co | Reduction of sulfur and ash of coal |
-
1981
- 1981-02-20 JP JP2473281A patent/JPS57139188A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3665066A (en) * | 1969-11-28 | 1972-05-23 | Canadian Patents Dev | Beneficiation of coals |
JPS5370076A (en) * | 1976-12-03 | 1978-06-22 | Shell Int Research | Method of aggregating coal powder |
JPS564692A (en) * | 1979-06-19 | 1981-01-19 | Atlantic Richfield Co | Reduction of sulfur and ash of coal |
Also Published As
Publication number | Publication date |
---|---|
JPS6258398B2 (en) | 1987-12-05 |
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