Thickener
PHOTO


NXZ type thickener is the new concentrating machine applying the theory of high efficient sedimentation. It is used for thickening, the preprocess of liquid-solid separation. in order to improve solid matter content from liquid-solid mixture, to reduce the volume of the mixture and the load of dewatering process. This machine has good features of higher efficiency, larger capacity, higher solids recovery compared with the traditional thickeners. It has been widely used in coal preparation, mineral processing, chemical, metallurgy, electric power, building materials and other industries.


Features of thickener


1.Simple and convenient installation & maintenance

2.The simple internal structure is convenient for the layout of hydraulic and electric control system.

3.Control the speed of rake by regulating oil volume of oil pump, so as to achieve the best state.

4.Automatic rake lifting and dropping.

5.Can be equipped with automatic reagent dosing system.


Working principle of thickener


NXZ thickener is composed of bridge frames, scraping rake, steady flowing barrels, transmission part, lifting rake part, railings, steel tank and others. Bridge frames are fixed to the supporting frames of thickening tank to bear the total loading of equipment and offer access for working staff to enter the concentrator’s center; vertical transmission using direct-cycloid reducer drive, through the gear pair driving large slewing ring gear which is installed in transmission, thereby stimulating the central axis of rotation, scraping rake frame and scraper system are connected with the central axis, through the rotation of the scraper to promote and realize the concentration of sediment material to the collection center of the pool.


Center drive type thickener


The Center drive thickener specifications are relatively small, generally less than 20m in diameter. In the case of the diameter below 12m, the manual raking method is generally adopted, and the automatic raking method is generally adopted in the case of the diameter above the 12m. Center drive type thickener is mainly composed of thickening pool, rake frame, transmission device, rake lifting device, feeding device,  discharge device and signal safety device etc. The structure is shown below.


thickener


As a general thickener concentrates before filtration or as tailings dewatering.  Used as a thickener concentrates, its products are discharged from the discharge port at the bottom of the concentrate, the concentration index is below 75%. Used as a thickener dewatering of tailings, it is the product of overflow water discharged from the upper overflow groove, the solid content index is less than 0.5%, and the sludge discharge index of 20%-30%.



Traction type thickener


Traction type thickener series, general diameter 15-100m, shrinkage pool made of concrete, the center has a reinforced concrete pillar, with the help of the end of the harrow frame bearing at the center pillar special, and the other end of the drive car is connected by roller supporting carriage on the rail track along the concentrated pool laying on the circumference. The roller is driven by a motor fixed on a transmission car through a reducer and gear rack transmission device, so that it rolls on the track and drives the rake rack to rotate to scrape the sediment. The structure is shown below.


thickener


Traction thickener is large, suitable for processing large amount of applications, mainly used to concentrate and tailings Concentrate Dewatering, can be widely used in condensed liquid containing solid particles of coal, chemical industry, building materials, water and wastewater treatment industry and purification.


Main parts of traction type thickener


1.Thickening pool


The pool structure according to its specifications, to the thickener operation requirements of material properties, the underflow discharging and terrain conditions, can be made of steel, concrete or masonry lining with matter in the earth. The wall and bottom of the groove can be made of the same or different material (or masonry). In order to prevent corrosion, the inner wall of the groove can be painted or lined with rubber or plastic.


2.Feeding way of traction type thickener


This thickener generally uses the center feed, slurry was sent to the center for ore thickener pool, and then slowly into the settlement area. In addition, there are around feeding and feeding at the bottom of the thickener. The surrounding material thickener to pulp distributor immersed in the pulp, installed in the thickener surrounding a certain depth from the overflow weir. Compared with the center feed, the feed processing amount is large.


3.Safeguard


Overload protection device and signal are important measures to ensure the normal operation of the large-scale thickener. At present, there are three types, hydraulic pressure, mechanical and electronic control safety protection device.


4.The transmission mechanism of thickener


Because of fine material settling speed is slow, in order to reduce the settlement process of interference, the rake type thickener rake arm speed must be slow, so the transmission speed ratio is large. General use of worm gear and three gear reducer can meet the requirements; in order to ensure the safe operation of the transmission mechanism of thickener, there must be a safety device to prevent precipitation too thick or excessive feeding and mechanical damage or motor.


Specification of thickener


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1.Simple and convenient installation & maintenance.

2.The simple internal structure is convenient for the layout of hydraulic and electric control system.

3.Control the speed of rake by regulating oil volume of oil pump, so as to achieve the best state.

4.Automatic rake lifting and dropping.

5.Can be equipped with automatic reagent dosing system.


NXZ thickener is composed of bridge frames, scraping rake, steady flowing barrels, transmission part, lifting rake part, railings, steel tank and others. Bridge frames are fixed to the supporting frames of thickening tank to bear the total loading of equipment and offer access for working staff to enter the concentrator’s center; vertical transmission using direct-cycloid reducer drive, through the gear pair driving large slewing ring gear which is installed in transmission, thereby stimulating the central axis of rotation, scraping rake frame and scraper system are connected with the central axis, through the rotation of the scraper to promote and realize the concentration of sediment material to the collection center of the pool.


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