| Project/Area Number |
03650515
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
資源開発工学
|
|---|
| Research Institution | YAMAGATA UNIVERSITY |
|---|
Principal Investigator |
KANDA Yoshiteru Yamagata Univ. Dept. Materials Sci. and Eng. Prof., 工学部, 教授 (40007034)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Masahiro Yamagata Univ. Dept. Materials Sci. and Eng. Assoc. Prof., 工学部, 助教授 (50007209)
|
|---|
| Project Period (FY) |
1991 – 1992
|
| Project Status |
Completed (Fiscal Year 1992)
|
| Budget Amount *help |
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1992: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1991: ¥1,000,000 (Direct Cost: ¥1,000,000)
|
|---|
| Keywords | Compressive crushing of powder bed / Ball mill gringing / Shape index / Control of particle shape / 形状調整 / 撹拌ミルの自生粉砕 / 形状分離 |
|---|
| Research Abstract |
The powdered and granular materials which are processed in industries range widely in particle sizes. Particle shapes as well as particle size of these materials are not uniform. It s well known that differences in particleshapes influence in the behavior of material during processing and handling. The particle shape affects the brindability of powdered or granular materials. In this study, In order to examine the possibility of the separation of differently shaped particles by grinding. The sample used was quartzglass. the feed sizes are 5.66-4.76mm, 0.232-0.174mm and 0.174-0.153mm. The ball mill grinding and the compressive crushing of powder beds were performed. The particle shape were evaluated by the shape index, the degree of circularity and the elongation.
The results were summarized as follows:
1. In the compressive crushing of powder beds, the mean shape index of unfractured particles decreased with increase in the applied load, that is, the energy input.
2. In the ball mill grinding, the mean shape index of unfractured particles decreased also decreased with increase in the grinding time
3. It was found that the grinding process which has a shape classification process is effective for comminution.
|
