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Filter element and a method for manufacturing a filter element

A filter element and filter process technology, applied in the direction of mobile filter element filter, filter separation, separation method, etc., can solve the problems of expensive replacement and increased operating time of filter plates, etc.

Active Publication Date: 2016-02-03
METSO OUTOTEC (FINLAND) OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because plate replacement can be expensive, it is important to increase the operating time of each filter plate

Method used

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  • Filter element and a method for manufacturing a filter element
  • Filter element and a method for manufacturing a filter element
  • Filter element and a method for manufacturing a filter element

Examples

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Embodiment Construction

[0029] The principles of the present invention can be used to dry or dehydrate fluid materials in any industrial process, especially in the ore and mining industries. In the embodiment described here, the material to be filtered is called slurry, but the embodiment of the present invention is not limited to this fluid material. The slurry can have a higher solid concentration, such as base metal concentrates, iron ore, chromite, ferrochromium, copper, gold, cobalt, nickel, zinc, lead, and pyrite. The following will illustrate exemplary embodiments of filter plates used for rotating vacuum disc filters, but the principle of the present invention can also be applied to filter media of other types of vacuum filters, such as rotating vacuum drum filters.

[0030] figure 1 It is a top perspective view showing an example disc filter device in which the filter plate according to the embodiment of the present invention can be used. The exemplary disc filter device 10 includes a cylindri...

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Abstract

A microporous ceramic capillary-action filter plate (22) made of recrystallized silicon carbide, i.e. pure silicon carbide. Silicon carbide (SiC), also known as carborundum, is a compound of silicon and carbon with chemical formula SiC. Grains of silicon carbide can be bonded together at elevated temperatures to form very hard ceramics. Unlike other types of silicon carbide materials, which uses additives (binders) to help bond the silicon carbide particles together, re-crystallized silicon carbide ceramics are produced from pure silicon carbide powder having bimodal grain size distribution, e.g. extremely fine and coarse grains. A filter plate based on pure crystallized silicon carbide is extremely corrosion resistant material which enables significantly longer lifetime of the filter plate also in filtration application wherein fluorine is present.

Description

Technical field [0001] The present invention relates generally to ceramic filter elements. Background technique [0002] Filtration is a widely used process. Through filtration, a slurry or solid-liquid mixture is forced to pass through a medium, and the solid remains on the medium while the liquid phase passes through the medium. This process is generally well understood in the industry. Examples of filtration types include depth filtration, pressure and vacuum filtration, and magnetic, gravity, and centrifugal filtration. [0003] Pressure and vacuum filtration are used for the dewatering of concentrate. The principle difference between pressure and vacuum filters is the way of generating the driving force for filtration. In pressure filtration, an overpressure is generated in the filter chamber by means of, for example, a diaphragm, a piston or an external device (such as a feed pump). Therefore, solids are deposited on the filter medium, and the filtrate flows through and r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D33/23B01D29/00
CPCB01D33/23B01D33/466
Inventor B·埃克贝格
Owner METSO OUTOTEC (FINLAND) OY
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