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Ceramic filter containing carbonaceous material and bonded with silica adhesive and manufacturing method thereof

A technology of silica gel adhesive and carbonaceous material, which is applied to the filter of carbonaceous material and silica gel adhesive. The manufacture of the filter includes the field of refractory materials, which can solve the problem of easy leakage of refractory particle filters, Solve problems such as low flow rate of molten metal and poor refractoriness, and achieve the effects of eliminating the risk of solidification, low scrap rate, and low heat storage

Active Publication Date: 2008-09-17
JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sintered porous ceramic filter successfully developed in the United States in the early 1970s solved the problems of easy particle leakage and inconvenient use of the refractory particle filter, it is different from the straight-hole honeycomb ceramic filter successfully developed in the early 1980s in the United States. Like the device, the porosity is still small, generally less than 50%, and the molten metal flow rate is low
However, carbon binders are soft at room temperature, so filters made with carbon binders are much less refractory than filters made with ceramic binders

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] During the preparation of the slurry, a high-efficiency mixer can be used to mix the solid and liquid in the slurry.

[0049] The disposable mold is a template of the required shape of the open-pored porous material produced by the method of the present invention. "Disposable" means that the material of the mold is eroded and most of it is burned or volatilized during sintering. The form can be, for example, a three-dimensional lattice of reticulated layers, an extruded open-celled reticulated structure, or a reticulated polymeric foam made of a thermoplastic material. For example the thermoplastic material may be polyurethane resin. More preferred is reticulated polyurethane foam. Reticulated polyurethane foam is suitable for use as disposable molds in molten metal filters.

[0050] It is more suitable to use coating for disposable molds. For example, polyurethane foam can be dipped in slurry or sprayed with slurry, and then passed through a pair of rollers to adjus...

Embodiment 1

[0060] Aluminum oxide powder: 80%

[0061] Anthracite: 10%

[0062] Active silicon powder: 10%

[0063] The above-mentioned materials are all commercially available materials, and the stated ratios are all percentages by weight. Add 2% sodium hexametaphosphate and 20% water to the mixture of alumina powder, anthracite and active silicon powder. Mix the powder and water with a high-efficiency mixer to make a slurry. This slurry is used to coat polyurethane foam. The polyurethane foam coated with the slurry was dried at 150°C. Sintering was then performed at 1100° C. in an oxygen-free atmosphere. The polyurethane foam therein is also a commercially available material.

[0064] The size of the filter made according to this formula is 50×50×15mm, and 50kg of molten steel is filtered at 1650°C. As a result, the filter has withstood the testing conditions and the molten steel has been filtered as required.

[0065] After testing with a flexural tester, the flexural strength o...

Embodiment 2

[0067] Aluminum oxide powder: 60%

[0068] Anthracite: 10%

[0069] Active silicon powder: 30%

[0070] The above-mentioned materials are all commercially available materials, and the stated ratios are all percentages by weight. Add 2% sodium hexametaphosphate and 20% water to the mixture of alumina powder, anthracite and active silicon powder. Mix the powder and water with a high-efficiency mixer to make a slurry. This slurry is used to coat polyurethane foam. The polyurethane foam coated with the slurry was dried at 150°C. Sintering was then performed at 1100° C. in an oxygen-free atmosphere. The polyurethane foam therein is also a commercially available material.

[0071] The size of the filter made according to this formula is 50×50×15mm, and 50kg of molten steel is filtered at 1650°C. As a result, the filter has withstood the testing conditions and the molten steel has been filtered as required.

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Abstract

The invention relates to a ceramic filter suitable for filtering metal fused mass, comprising refractory material, carbonaceous material and silica adhesive. The invention also relates to making method for the filter. The ceramic filter has the advantages of more economical making, high mechanical strength not shrinkage during sintering process, more stable performance in memory process and more safe usage.

Description

technical field [0001] The invention relates to a ceramic filter suitable for filtering molten metal, in particular to a filter comprising refractory material, carbonaceous material and silica gel adhesive. The invention also relates to a method of manufacturing said filter. Background technique [0002] In casting production, the casting reject rate caused by casting defects such as non-metallic inclusions is generally as high as 50% to 60% of the total rejects. Inclusion defects not only seriously reduce the mechanical properties of castings, but also have harmful effects on their processing performance and appearance. Purifying liquid casting alloys to reduce or eliminate various non-metallic inclusions is undoubtedly a very important technical measure to obtain high-quality castings. The purpose of purifying liquid casting alloys can be effectively achieved by using filtration technology. [0003] Filtration technology has been used in foundry production for decades, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20C22B9/02
Inventor 祝建勋江成真刘敬浩沈淑丽
Owner JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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