thickener is a kind of new high-efficiency thickener developed relying on German technology. This machine has both the advantages of traditional central driving thickeners and peripheral traction thickeners. It is originated in China and is regeneration product of traditional thickener. This type of thickeners is widely used to treat thick industrial slurry such as coal, metal ore dressing water, metallurgical wastewater, and chemical slurry.
Thickener is a continuous concentration and clarification equipment. It’s mainly used for dewatering of fine and tail pulp in wet dressing operation, and also widely used for concentration and purification of solid slurry including coal, steel, chemical industry, building materials, water source and sewage treatment.
Thickener is one of the essential equipment in every large concentrator. The main functions of thickener are concentrated pulp and recycled water reuse. At present, the most commonly used thickeners mainly include common thickener, inclined plate thickener and high efficiency thickener.
Types of Thickener
The common thickener has reliable operation and low operating cost, and can store and buffer the feed. It is the most widely used concentration equipment in concentrator. According to its transmission mode, it can be divided into central transmission type and peripheral transmission type; According to the number of working face, it can be divided into single layer, double layer and multi-layer thickener. Because of its large diameter, this kind of thickener occupies a large area and has low production capacity per unit area.And because it is based on the gravity settlement of particles, the settlement speed is proportional to the square of the diameter of particles,so it has low efficiency to deal with fine materials.
2.Inclined Plate Thickener
The inclined plate thickener is equipped with many inclined plates on the upper part of the cylinder tank of the common thickener. These inclined plates are inclined to the center of the thickener along the circumferential direction, and the included angle with the horizontal is about 60 °. These measures accelerate the separation of ore particles, shorten the settling time of materials, strengthen the separation and settling process, improve the concentration efficiency, reduce the capital investment, and increase the production capacity by about three times.
3.High Efficiency Thickener
In addition to the inclined plate installed in the thickener, the high efficiency thickener has a special flocculant adding mechanism. The diameter of the thickener can be reduced to 1 / 3-1 / 2 of that of the common thickener, and the floor area is only 1 / 9-1 / 4 of that of the common thickener. However, the processing capacity per unit area has increased by dozens of times. It is a new type of high-efficiency thickener which is increasingly widely used.
The above is according the physical structure to divide the thickener. It can also be divided into peripheral drive thickener and central drive thickener accord the drive mode. Different thickeners are suitable for different sites, different pulp, different scales, etc. If you need a thickener, you can consult our mining machinery technicians to select the most suitable thickener according to the actual situation.
Thickener (high-efficiency thickener) is generally composed of concentration tank, rack, transmission device, rack lifting device, feeding device, discharging device and signal safety device.
The concentration and sedimentation of high-efficiency thickener is a new method using slurry and adding appropriate amount of flocculant.
The slurry and flocculant are mixed quickly and evenly to obtain the best flocculation effect, so as to make the flocculation group settle quickly and realize the solid-liquid separation.
Before entering the high-efficiency thickener, the slurry is removed by the degassing device, and then enters the mixing device from the feeding pipe. In the mixing device, the slurry is fully mixed with an appropriate amount of flocculant to form a good flocculation state, and then diffuses from the bottom to the surrounding into the pre formed high concentration sediment layer at the bottom of the concentration tank.
At this time, the flocculated slurry (floc) precipitates to the bottom of the tank; The slurry water rises through the sediment layer. The settling layer acts as a filter to prevent the rise of fine particles. The slurry that has not been fully flocculated will continue to contact with the flocs when it reaches the settling layer, so that the flocs will continue to grow. Finally, the rake frame is driven by the central driving device to push the concentrated material to the central discharge outlet, and the slurry water flows out from the overflow outlet.
Advantages and Features
Increase the particle size of settling solid particles by adding flocculant , thus to accelerate the settling speed;
The settlement distance is shorten and the settlement area is increased by the installation of inclined plate ;
Play the role of flocculation, filtration, compression and increase the treatment capacity of the thick layer of mud deposition;
Complete automatic control facilities are equipped.