knelson-concentrator is one of high frequency used alluival gold separating machine . Compared with shaking table , it have higher processing capacity ,lower water consumption . Centrifugal concentrator is a batch machine that mean it can not unstopped working for long time . The gold ore after concentrated by gold centrifugal is recommended to separate by shaking table again to improve the grade .
Product Introduction
knelson-concentrator is a gravity separation equipment that separates minerals with a large contrast in the centrifugal force field. It is one of the highly efficient gravity separation equipment and a new type of gravity concentration equipment for concentrating gold and other high density minerals. It’s mainly used in the selection of placer gold, the preliminary enrichment of precious metal concentrates such as rock gold after grinding. So usually it is also called gold centrifugal concentrator or placer gold separator. Compared with other concentration machines, gold centrifugal concentrator has many competitive advantages that create high returns for the investors. So it’s popular in gold mining.
Structure
The knelson-concentrator is composed of feeding pipe, frame, tailing tank, drive motor, vertical shaft and beneficiation parts.
The beneficiation parts are divided into inner and outer layers.
The inner layer is a head-mounted cone. The inner cone is generally made of stainless steel with annular grid bars. There are many small holes on the cone wall.
The outer layer is made of ordinary steel plate. The inner and outer layers form a closed water jacket.
The middle drive shaft is a hollow shaft. The pressure water is fed into the water jacket formed by the inner and outer cones through the hollow shaft. The inner small holes continuously spray water into the grid bars to form backwash water. During the sorting process, the backwash water pressure level is 0.03-0.06MPa.is composed of feeding pipe, frame, tailing tank, drive motor, vertical shaft and beneficiation parts.
The beneficiation parts are divided into inner and outer layers.
The inner layer is a head-mounted cone. The inner cone is generally made of stainless steel with annular grid bars. There are many small holes on the cone wall.
The outer layer is made of ordinary steel plate. The inner and outer layers form a closed water jacket.
The middle drive shaft is a hollow shaft. The pressure water is fed into the water jacket formed by the inner and outer cones through the hollow shaft. The inner small holes continuously spray water into the grid bars to form backwash water. During the sorting process, the backwash water pressure level is 0.03-0.06MPa.
We have two materials of rotor of our centrifugal separator: stainless steel and PU. The commonly used is stainless steel. PU material is more wear-resistant but cost more.
Parameters
Types of knelson-concentrator
1. Common Used Models – Non-automatic Mine Discharge: the gold centrifugal concentrator will be manually stopped after 4-6 hours of operation to clean the concentrate manually, then restart it to work.
2. Timing Automatic Discharge: We can custom according to customer needs. The cost is much higher, but the work efficiency is higher. It needs power distribution control cabinet.
With an electric control cabinet to control the switch of the pipeline gate valve, set the discharge time first (for example, 4 hours or 6 hours, it depends on the taste of the concentrate), install the electromagnetic gate valve on the sand pump pipe and the water pipe to switch automatically. The sand pump pipe with double. The main pipeline gate valve is automatically closed when it comes to the set time. And the side pipeline gate valve is automatically opened at the same time. The slurry is discharged from the side pipeline, and the recoil gate valve is automatically closed to stop feeding backwash water. The water pipe gate valve above the feed port automatically start to inject high pressure water to flush the concentrate inside the rotor. After a few minutes the concentrate is drained, it will automatically restart the equipment to work.
Working Principle
The rotor of the centrifugal concentrator rotates at a high speed at a certain number of revolutions. The slurry is sent to the inner wall of the drum by the ore separator through the ore nozzle in two places. The slurry rotates with the drum at high speed. Under the action of centrifugal force, heavy minerals are deposited on the inner wall of the drum and rotate with the drum. At the same time, it is necessary to continuously feed backwash water from the outside to the middle layer of the centrifugal rotor. A certain differential speed rotates with the drum. In the process of rotation, it rotates and flows along the slope of the drum from the feeding end with a certain helix angle, then to the discharge end, and later discharges through the discharge separator, which is the tailings.
After working for about 4-6 hours, the inner wall of the rotor is enriched with a certain amount of concentrate, stop feeding the ore into the rotor. Wait the tailings are discharged, the ore discharging separator will automatically turn away from the original normal position and prepare to intercept the concentrate. Then the high-pressure flushing water valve is opened, and the high-pressure flushing water washes down the concentrate deposited on the inner wall of the rotor. After the concentrate is drained, the equipment is restarted and the cycle is repeated.
Advantages and Features
1.High Efficiency: Strong centrifugal force produced by high speed spin strengthens the process of gravity separation and effectively recover the fine ore particles.
2.High Recovery Rate: Application shows that the recovery can be higher than 98%. The concentrating ratio is up to 1,000 times. For different mines and particle size, the recovery rate is slightly different. Such as the gold recovery is 97% for 0.04mm in particle size, the gold is up to 98% in recovering the natural gold in lode ore with size -0. 074mm.
3.Small Footprint: only a small leveled place required.
4.Easy to Install: Only need connect the fluidization water and power.
5.Easy to Adjust: You can get the best recovery effect by giving proper water pressure and feeding size because just water pressure and feeding size will affect the recovery result.
6.Easy to Operate: Take the concentrate at the specified time.
7.100% Environment-friendly: chemical and mercury free, and use only recycled water.
Reliable: Our Gold Centrifugal Concentrator gets a simple and tough structure. The main body is made by strong steel and the concentrate cone is made by stainless steel. It can run well by greased the bearing.