微粉脱水用連続遠心脱水機の操業成績について
1955 年 71 巻 807 号 p. 547-552
詳細
1955 年 71 巻 807 号 p. 547-552
Several tests have been made with continuous centrifuges for the purpose of dewatering the flotation froth of fine coal at Sakito (Nagasaki) and Bibai (Hokkaido) collieries, Mitsubishi Coal Mining Co., Ltd.
The results of the tests and performances in actual operations are summarized as follows:
1) The continuous centrifuges tested were proved to be applicable for dewatering fine coal froth.
2) The effectiveness of dewatering and capacity of the machine are greatly affected by the percentage of minus 300-mesh particles in the feed.
3) The ash content of the dewatered coal is about 4 percent lower than that of the feed, owing to the desliming action of the machine.
4) Considering the lives of wearing parts, the speed of rotation and the difference between the speed of outer bowl and inner screw should be preferably low.
5) The dewatering cost is about 170 to 200 yen per ton of dewatered coal.
