Studies on a Shaking Separator (I)
Physical Property of Grain and Separating Performance
1981 Volume 43 Issue 1 Pages 73-82
Details
1981 Volume 43 Issue 1 Pages 73-82
The objective of this study was to find out the relationship between separating performances and physical properties of grain, using a shaking separator of which frequency and feeding rate were 240cpm and 200kg/h respectively. The difference of size and frictional coefficient of grain might be principal factors related to separation of the grains, and a feeding material used were trimmed with a combination of processed grain and some kinds of grain. And the separating performance in the range of the discharge end would be illustrated with the value of recovery and Newton's efficiency.
The main results were as follows:
1) When both the difference of the frictional coefficient and that of the grain size in the feeding material were nearly equal to zero, it was quite impossible to get the desirous grains and tailings in the discharge end separately. Therefore, the value of Newton's efficiency was zero. And it is clear that there is also no separating possibility when only the difference of the frictional coefficient of grain is in a feeding material.
2) When both the difference of the frictional coefficient and that of the grain size in a feeding material were larger than zero, the recovering of the desirous grain and tailings was very easily practicable in the upper and lower portion in the range of the discharge end separately. It is tendency that in this case, the value of Newton's efficiency increases proportionally with the increase of the range of the discharge end, and it arrives at the peak value, and then it gradually decreases. Generally speaking, the increase both the difference of the frictional coefficient and that of the grain size among grains makes the value of Newton's efficiency increase.
3) When only the difference of the grain size in a feeding material were larger than zero, the value of Newton's efficiency was considerably higher.
4) In the case of the separation of grain using the shaking separator, the difference of the grain in a feeding material might be induced the segregation of grain, and that of the frictional coefficient of grain might be induced the movement of grain on the separating surface. It is clear that the separating performance of the shaking separator is materially improved by the action of above these factors.
