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A technology of silicon carbide ceramics and oxides, applied in chemical instruments and methods, filtration separation, gravity filters, etc., can solve the problems of compact structure affecting filtration speed, failure to meet filtration requirements, etc., and achieve fast filtration speed and thermal stability Good performance, good filtering effect
Inactive Publication Date: 2009-01-14
刘启庞
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Such as: corundum, alumina or silicon carbide, etc., although the filter tubes made of these materials can play a filtering role, but due to the compact structure affecting the filtering speed, the filtering effect cannot be achieved.
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Embodiment 1
[0017] The first step is to select the raw materials silicon carbide-90, silicon micropowder-6, kaolin-2, silica sol-1, corundum micropowder-1 according to weight components.
[0018] In the second step, the above raw materials are mixed, and then an appropriate amount of water, a surfactant and a plasticizer are used for kneading, and after kneading, aging is carried out, and the aged raw materials are processed into tubular blanks and dried.
[0019] The third step, coating: choose αAl according to the weight component 2 o 3 Micropowder-20; Al(OH) 3 Micro powder - 70; Kaolin powder - 10 After mixing, add hydroxypropyl methylcellulose to make pulp; plate the prepared pulp on the tubular blank, and dry it.
[0020] The fourth step, firing: put the dried coated pipe fittings into the furnace for firing. During firing, gradually increase the temperature and fire according to the heating stage of 550-1400°C, and combine the fired oxide with silicon carbide ceramics After the f...
Embodiment 2
[0022] The first step is to select the raw materials silicon carbide-85, silicon micropowder-7, kaolin-3, metal silicon micropowder-2, charcoal-3 according to weight components.
[0023] In the second step, the above raw materials are mixed, and then an appropriate amount of water, a surfactant and a plasticizer are used for kneading, and after kneading, aging is carried out, and the aged raw materials are processed into tubular blanks and dried.
[0024] The third step, coating: choose αAl according to the weight component 2 o 3 Micropowder--2O; Al(OH) 3 Micro powder - 70; Kaolin powder - 10 After mixing, add hydroxypropyl methylcellulose to make pulp; plate the prepared pulp on the tubular blank, and dry it.
[0025] The fourth step, firing: put the dried coated pipe fittings into the furnace for firing. During firing, gradually increase the temperature and fire according to the heating stage of 550-1400°C, and combine the fired oxide with silicon carbide ceramics After t...
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Abstract
The present invention relates to a ceramic film tube made of silicon carbide combined with oxide, which is composed of a film (1), a tube body (2) and a filtering frame (3). The integral materials of the ceramic film tube are processed with binder, surfactant, plasticizer, pore-forming agent and preservative. The fabrication processes of the ceramic film tube include the processing of tubular main body materials, the processing of auxiliary processing materials and filming materials. The weight portions of the tubular main body materials are as follows: 85 to 92 portions of silicon carbide, 6 to 12 portions of fine silicon powder, 0 to 5 portions of kaoline, 0 to 3 portions of powdered alumina and 0 to 5 portions of silica sol; the weight portions of the auxiliary processing materials: 0 to 3 portions of fine metallic silicon powder, 2 to 4 portions of binder, 2 to 4 portions of lubricant, 0 to 0.5 portions of surfactant, 0.5 to 1 portions of plasticizer, 3 to 5 portions of pore-forming agent, 0.1 to 0.5 portions of preservative and water; and the weight portions of the filming materials are as follows: 20 portions of fine Alpha Al2O3 powder, 70 portions of fine Al(OH)3 powder and 10 portions of kaoline. The ceramic film tube has the advantages of porosity larger than 40 percent, press resistance, bending resistance, good thermal stability, large strength, high filtering speed and good filtering effect. The ceramic film tube can be widely used in a filtering basin, a filter and other filtering devices.
Description
technical field [0001] The invention relates to the manufacture of an oxide-bonded silicon carbide ceramic membrane tube, which is mainly used in a waste liquid (gas) filter device. technical background [0002] At present, the country attaches great importance to environmental protection, especially the treatment of industrial waste liquid (gas), so researchers have carried out a lot of research work on how to deal with industrial waste liquid (gas). For example, the waste liquid is filtered by filter tanks, filters and other methods. But the key to filter in the filter pool and filter is the filter tube. Therefore, people pay close attention to the research on the filter tube. Recently, most of the filter tubes used by people are processed with ceramic raw materials. Such as: corundum, alumina or silicon carbide, etc., although the filter tubes made of these materials can play a filtering role, but due to the compact structure affecting the filtering speed, the filterin...
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Application Information
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