Claims
- 1. A high-density coal-water mixed fuel comprising pulverized coals produced by grinding a coal so as to provide a predetermined particle size distribution, water, dispersant, and hydrophilic colloid which caused a protective effect with respect to the pulverized coals and is present in an amount of 10.sup.-4 ppt to 10.sup.6 ppt of the water.
- 2. A high-density coal-water mixed fuel according to claim 1, wherein an amount of the hydrophilic colloid is 1 ppt to 10.sup.3 ppt of the water.
- 3. A method for producing a high-density coal-water mixed fuel comprising mixing pulverized coals produced by grinding a coal to a predetermined particle size distribution, with water to form a mixture; adding to the mixture hydrophilic colloid which causes a protective effect with respect to the pulverized coals and whose amount is 10.sup.-4 ppt to 10.sup.6 ppt of the water to form a gel; and then adding a dispersant to the gel to form a sol.
- 4. A method for producing the high-density coal-water mixed fuel according to claim 3, wherein the pulverized coals obtained by dry milling are further abraded so as to be pushed and rubbed together so that the pulverized coals are spheroidized by scraping off their angles and superfine particles are generated.
- 5. A method for producing the high-density coal-water mixed fuel according to claim 3, wherein an amount of the hydrophilic colloid is 1 ppt to 10.sup.3 ppt of the water.
- 6. A method for producing the high-density coal-water mixed fuel according to claim 4, wherein an amount of the hydrophilic colloid is 1 ppt to 10.sup.3 ppt of the water.
- 7. A method for producing a high-density coal-water mixed fuel comprising the steps of: obtaining pulverized coals having a particle size substantially equal to or less than a predetermined value by dry-milling a coal by a mill; using a spheroidizing apparatus for pushing and rubbing the pulverized coals to rub the pulverized coals together in order to spheroidize the pulverized coals by scraping off their angles and generate superfine particles; adding water to the pulverized coals after using the spheroidizing apparatus, to form a mixture, and adding to the mixture hydrophilic colloid which causes a protective effect with respect to the pulverized coals in the amount of 10.sup.-4 ppt to 10.sup.6 ppt of the water.
Priority Claims (2)
Number |
Date |
Country |
Kind |
7-255806 |
Sep 1995 |
JPX |
|
8-53377 |
Mar 1996 |
JPX |
|
Parent Case Info
This application is a 371 of PCT/JP96/025446 filed on Sep. 6, 1996.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/JP96/02546 |
9/6/1996 |
|
|
3/5/1998 |
3/5/1998 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO97/09399 |
3/13/1997 |
|
|
US Referenced Citations (11)
Foreign Referenced Citations (9)
Number |
Date |
Country |
113517 |
Jan 1983 |
JPX |
225955 |
Jan 1983 |
JPX |
248035 |
Jan 1984 |
JPX |
59-43093 |
Jan 1984 |
JPX |
59-30894 |
Jan 1984 |
JPX |
596288 |
Jan 1987 |
JPX |
63-20276 |
Jan 1988 |
JPX |
6264075 |
Jan 1994 |
JPX |
63113098 |
Jan 1998 |
JPX |
Non-Patent Literature Citations (1)
Entry |
PCT/JP96/02546 Search Report Dec. 10, 1996. |