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Spiral aluminum oxide ceramic nozzle for flue gas desulfurization slurry atomization and manufacturing method thereof

A technology of alumina ceramics and alumina ceramic powder, which is applied in chemical instruments and methods, separation methods, injection devices, etc., can solve the problems of uneven density, low strength and high nozzle price of the green body, and improve the density and size. Accuracy, overcoming the uneven density of the green body, and improving the effect of flue gas desulfurization efficiency

Inactive Publication Date: 2010-11-03
山东省环保陶瓷工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, due to the inherent free silicon of about 20% or even higher in reaction sintered silicon carbide ceramics, the wear resistance, erosion resistance and corrosion resistance of this material are not ideal; on the other hand, the silicon carbide nozzle blank The body is formed by the solid grouting process of the plaster mold, which has the phenomenon of uneven density, low strength, easy deformation, easy cracking, and low yield of the green body, which leads to the problems of high nozzle price and unsatisfactory atomization effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The basic ratio of the alumina ceramic powder is: 90 parts by weight of alumina powder, 1.5 parts by weight of calcium carbonate, 1.5 parts by weight of talcum powder, 1 part by weight of boron carbide, and 6 parts by weight of kaolin.

[0025] Add 25 g of acrylamide monomer and 1 g of N,N'-methylenebisacrylamide cross-linking agent to 100 g of deionized water and stir until dissolved, then add 1 g of tetramethylammonium hydroxide to prepare a mixed solution. Subsequently, 450g of alumina powder, 7.5g of calcium carbonate, 7.5g of talc, 5g of boron carbide and 30g of kaolin were added to the mixture to prepare a ceramic composite slurry, and ball milled for 10 hours to obtain a slurry with good fluidity. After vacuum defoaming at room temperature for 10 minutes, 0.25 g of ammonium persulfate initiator was added to the slurry and uniformly dispersed. The above ceramic composite slurry is injected into the mold, heated at 60°C, solidified and demolded after 50 minutes, an...

Embodiment 2

[0027] The basic ratio of the alumina ceramic powder is: 94 parts by weight of superfine high-purity alumina powder, 1 part by weight of calcium carbonate, 1.5 parts by weight of talcum powder, 1 part by weight of boron carbide, and 2.5 parts by weight of kaolin.

[0028] 21 g of methacrylamide and 1 g of N,N'-methylenebisacrylamide crosslinking agent were added to 100 g of deionized water and stirred until dissolved, and then 1.5 g of polyvinylpyrrolidone was added to prepare a mixed solution. Subsequently, 470g of alumina powder, 5.0g of calcium carbonate, 7.5g of talcum powder, 5.0g of boron carbide, and 12.5g of kaolin were added to the above mixture to prepare a ceramic composite slurry, and ball milled for 15 hours to obtain a slurry with good fluidity. After vacuum defoaming at room temperature for 10 minutes, 0.25 g of ammonium persulfate initiator was added to the slurry and uniformly dispersed. Inject the above-mentioned ceramic composite slurry into the mold, heat a...

Embodiment 3

[0030] The basic ratio of the alumina ceramic powder is: 96 parts by weight of superfine high-purity alumina powder, 1 part by weight of calcium carbonate, 0.5 parts by weight of talcum powder, 0.5 parts by weight of boron carbide, and 2 parts by weight of kaolin.

[0031]Add 18 g of methacrylamide and 1 g of N,N'-methylenebisacrylamide cross-linking agent into 100 g of water and stir until dissolved, then add 1.5 g of polyammonium methacrylate to prepare a mixed solution. Subsequently, 480g ultrafine high-purity alumina powder, 5g calcium carbonate, 2.5g talcum powder, 2.5g boron carbide, and 10g kaolin were added to the above mixed solution to prepare a ceramic composite slurry, and ball milled for 18 hours to obtain a slurry with good fluidity. material. After vacuum defoaming at room temperature for 10 minutes, 0.25 g of ammonium persulfate initiator was added to the slurry and uniformly dispersed. The above ceramic composite slurry was injected into the mold, heated at 8...

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Abstract

The invention discloses a spiral aluminum oxide ceramic nozzle for flue gas desulfurization slurry atomization and a manufacturing method thereof. The spiral aluminum oxide ceramic nozzle is made of aluminum oxide ceramic powder by a gel injection molding process, wherein the aluminum oxide ceramic powder comprises the following components in parts by weight: 90-98 parts of superfine high-purity aluminum oxide powder, 1-1.5 parts of calcium carbonate, 2-7 parts of kaolin, 0.5-2 parts of burned talcum and 0.5-1 part of boron carbide. The nozzle has the characteristics of high wear resistance, high shock resistance, high corrosion resistance, low cost and long service life. In the invention, a spiral aluminum oxide ceramic nozzle blank with accurate size is prepared by the gel injection molding process and a blank cold machining process, thus overcoming the defects of the blank shaped by the traditional grouting molding method such as nonuniform density, cracking, low strength of the blank, difficult machining and the like, and improving the consistency and the size accuracy of the blank and a sintering body.

Description

technical field [0001] The invention relates to a limestone slurry atomized alumina ceramic nozzle for wet flue gas desulfurization and a manufacturing method thereof, belonging to the technical field of environmental protection. Background technique [0002] The spiral desulfurization nozzle refers to a desulfurization nozzle in which the slurry continuously changes direction after being tangent to the helix or is sprayed into concentric cones in sheets with the continuously shrinking helix. Due to the abrasiveness and corrosion of limestone slurry, atomizing nozzles for flue gas desulfurization are often made of ceramic materials with high hardness and high wear resistance. At present, domestic and foreign flue gas desulfurization atomizing nozzles basically use reaction sintered silicon carbide nozzles, and some domestic silicon carbide ceramic manufacturers have produced flue gas atomization reaction sintered silicon carbide ceramic nozzles. Chinese patent CN20041003543...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/80B01D53/48B05B1/00C04B35/10C04B35/622
Inventor 赵友谊张玉军纪淑芸王晋槐李忠光宋友杰汲素娟吴洽阔
Owner 山东省环保陶瓷工程技术研究中心
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