Centrifugal sedimentation is carried out in a centrifugal field. It is characterized by the fact that the centrifugal force of the fine ore particles in the centrifugal field greatly exceeds the gravity, thereby accelerating the sedimentation of the ore particles (ie increasing the radial precipitation rate) and strengthening the dehydration. process. The ore particles move in a circular motion in the centrifugal force field, thus creating a centrifugal force, denoted by the symbol C: Where m is the quality of the ore particles; Where K is the centrifugal separation factor, times; Floating Ball Valve used to shut off or connect medium of pipeline, such as water, chemical solvent, acid, or natual gas etc. Floating ball vavle are generally suitable for small and low pressure systems, with the advantages of simple valve design, long service life etc, easy maintenance, blow-out proof stem, stable sealing performance. The valve size can be from 1/2" to 10" and the valve pressure is from 150 to 600, operated by a lever, pneumatic actuator or hydraulic actuator Flange connection with pipeline is common type for floating Ball Valve. Floating Ball Valve Floating Ball Valve,Casted Steel Valve,Forged Steel Valve,Hydraulic Ball Valve Yongjia South Trading Co.,Ltd , https://www.n-lvalve.com
V——rotary circumferential speed, m/s;
R - radius of gyration, meters;
Ω—the angular velocity of the centrifugal sedimentation machine, radians/second.
The indicator for measuring the increase of the ore force in the centrifugal sedimentation machine is the ratio of the centrifugal acceleration to the gravitational acceleration g, called the centrifugal separation factor K, and its value can be calculated by the following formula:
G——gravity acceleration, m/s 2 ;
n - the number of revolutions, conversion / points;
D - the diameter of the drum, meters.
It can be seen from the above formula that the larger the centrifugal acceleration, the larger the separation factor and the larger the sedimentation velocity of the ore. Therefore, increasing the rotation speed and diameter of the centrifugal sedimentation machine can achieve this purpose. For example, when the rotating speed of the centrifuge of the centrifugal sedimentation machine is 450 rpm, and the average diameter of the drum is 0.842 meters, the separation factor is: . That is to say, the centrifugal acceleration of the ore particles in the centrifugal sedimentation machine is 95 times that of the gravity gravity in the general gravity sedimentation tank, thereby greatly accelerating the sedimentation speed of the ore particles.
The biggest advantage of the centrifugal sedimentation machine is that it can effectively treat the precipitation of fine-grained slurry. For the precipitation of fine particles of the slurry, sedimentation tank or thickener, fine ore particles gravity settling velocity is small, the precipitation process is very slow, often take a large amount of overflow fine mud, resulting in loss of metal, and the precipitate The concentration of the substance is low and the concentration effect is poor. The centrifugal sedimentation machine is a relatively promising dewatering equipment . However, the centrifugal sedimentation machine has large power consumption, complicated equipment structure, and troublesome management and maintenance.