TS Decanter Centrifuge
A decanter centrifuge, or solid bowl centrifuge, uses high rotational speed generating centrifugal force to separate materials of different densities.
This equipment is used in solid/liquid and liquid/liquid (liquid phase) separation applications in minerals processing, chemical, oil, food processing and wastewater treatment industries.
Multotec has manufactured and supplied industrial decanter centrifuges and centrifuge equipment to the international mineral, chemical and industrial processing market for over 40 years. These centrifuges are known worldwide for their exceptional versatility and ability to effectively separate very fine solids from liquids of lighter density.
Our range is specifically manufactured for slurries that are traditionally difficult to separate, due to low-density solids or viscous-liquids. All sold bowl centrifuges in the range offer the following benefits:
Multotec has been engineering and producing these centrifuge types for use in mineral processing industries for over 45 years.
Low-density solids or viscous-liquids can make it difficult to separate slurries. Multotec overcome this with exceptional ability of the centrifuge to effectively separate very fine solids from liquids of lighter density. Additional benefits of our range include:
All industrial decanter centrifuges from Multotec are designed to ensure maximum separation efficiency and reduce overall waste content in your water treatment systems and mineral processing applications. This ensures excellent by-product recovery.
Our range of decanter centrifuges is specifically manufactured for slurries that are traditionally difficult to separate, due to low-density solids or viscous-liquids.
Clarification of the liquid inside the centrifuge takes place primarily in the cylindrical section of the centrifuge. The dewatering of the solids takes place by filtering the solids cake (or compressing the solids cake) in the conical part of the bowl.
The centrifuge is bowl-shaped with a tube that can rotate at extremely high pre-determined speeds. This high centrifuge speed facilitates the separation of solids, liquids and gases.
The principle of a decanter centrifuge is based on the gravitational separation theory. However, inside the centrifuge, gravitational acceleration is replaced by much higher centrifugal acceleration – anywhere from 1 000 to 4 000 times the normal gravitational force. This means the required separation time is reduced from hours to seconds.
SIEBTECHNIK decanting centrifuges (manufactured under licence by Multotec) work on the counter-flow principle:
The height of the liquid level in the bowl and the resulting ratio of clear liquid and dry solids can be continuously adjusted. This allows for optimum control of the required separation.
The differential speed between worm and bowl is done with a gear unit. The standard drive arrangement is via V-belts. Depending on the required rotating speed combination, the centrifuge is equipped with either a single drive or double drive design.
These types of centrifuges are used primarily in the solid/liquid separation processes in mineral processing applications.
There are numerous possible applications and processing methods for these centrifuges in minerals. These include from the ceramics industry through to cosmetics for the paint industry; from straightforward mechanical processing through to use in chemical processes.
For solid/liquid separation in the minerals processing industry, decanter centrifuges are used for:
• Calcium carbonate
• Titanium dioxide
• Zinc sulphate
• Aluminium hydroxide
In addition to mineral processing, the decanter separator is used in the chemical, oil, and food processing industries as well as for wastewater treatment.
Decanters of the TS series are typically used in gastight process systems. The closed process housing in combination with proven sealing designs at the small shaft diameters and the design, coordinated with the precise operating conditions, give this centrifuge series a very high degree of reliability.
The DZ series can also be supplied in a vapour-tight and gastight design. For these applications, the product housings are manufactured in two pieces and sealed with chamber rings. The geometry of the rotating parts is designed for the specific separation requirement.
The rotating assembly is carried by pedestal bearings located outside the product housing. Machines with bowl diameters greater than 1 000 mm are standard design in the DZ series.
The screen decanter is a combination of a solid bowl decanting centrifuge and a screen worm centrifuge (screen scroll) with exceptional dewatering results for crystalline and granular products.
In the decanter component, the feed suspension is first pre-thickened, i.e. it is extensively dewatered in the conical part of the solid bowl. The liquid is clarified in the cylindrical part and finally discharged. The pre-thickened solids are transported into the cylindrical screen section by the worm where additional dewatering is achieved.
A special SIEBTECHNIK washing system allows particularly efficient washing in the screen area of this machine. The original liquor and washing fluid can be separately discharged.
Due to the low residual liquid entering the screening section, fine solids losses are low and can be further reduced by returning the filtrate to the inlet of the centrifuge.
Manufactured from abrasion-resistant 430 stainless steel, or 304 stainless steel for corrosive applications, Multotec Optima centrifuge baskets are used across the world in coal, chemicals, food and beverage and other industries.
They incorporate accelerator bars to assist in calibrating the speed of the material to the speed of the rotating basket.
Optional extras include a
The feed end flange is fully machined, ensuring a perfectly symmetrical mounting flange and the correct length for the basket. Centrifuge baskets are dynamically balanced to provide peak performance and to minimise the wear and tear on your industrial centrifuge.
Designed to increase separation efficiency for all particle sizes, these centrifuges are serviced and supported internationally. The entire range has been tested in real-field conditions at optimal centrifugal force in order to ensure optimised separation efficiency.
These centrifuge machines are programmed to follow the ‘counter-flow’ principle, where separation begins from the bowl centre. The stream is then transported to the smaller-diameter scroll that rotates at a different speed to the bowl, while the clarified liquid flows out the bowl via the large-diameter scroll.
A specialised double-bearing design on each side of the rotating parts facilitates high rotational speeds with high gravitational force required for sedimentation separation. This rotational speed is achieved with an optimised gear unit.
In addition, the height of the liquid level in the bowl can be continuously adjusted in the centrifuge, enabling optimum control of the required separation.
Multotec supplies a range of heavy-duty, high-performance, universal SIEBTECHNIK industrial decanter centrifuges that separate very fine solids from liquids of lighter density.
Used by both the municipal and industrial sectors these centrifuges offer extreme versatility to a wide range of applications and are designed to increase separation efficiency for all particle sizes.
All equipment and products from Multotec are designed and manufactured to the most stringent quality standards in our ISO 9001 manufacturing facilities.
Founded in 1973, the Multotec Group is active in 100 countries and partner to some of the world’s largest mining houses. Some of these are BHP Billiton, Glencore, RIO Tinto, First Quantum Minerals Ltd, Anglo American, and many others.
We use Computational Fluid Dynamic simulations, pilot plant and online test work to improve the metallurgical performance of the process equipment. Detailed Finite Element Analysis (FEA), 3D design, as well as the correct specifications of wear resistant materials are all used to develop all product and equipment designs.
Developed in response to the challenges our customers face in improving their mineral processing efficiency, Multotec products are proven n the toughest commodity processing applications across the world.
Find out more about our manufacturing capabilities.