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Process for manufacturing integral fine crystal alumina ceramic bend pipe

A fine-grained alumina and manufacturing process technology, applied in the field of ceramics, can solve the problems of frequent maintenance and replacement, easy shedding of the ceramic layer, short service life, etc., and achieve the effects of reduced maintenance times, good economic benefits, and good wear resistance

Inactive Publication Date: 2009-02-18
JINGANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: the bonding layer of the ceramic elbow is easy to produce gaps after being washed by powder, it is easy to wear the steel pipe, and the ceramic layer is easy to fall off, the service life is short, and maintenance and replacement are frequent, causing great losses to normal production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The manufacturing process of the integral fine-grained alumina ceramic elbow, the specific steps are:

[0010] (1) Place the sintered fine-grained alumina straight tube on a U-shaped corundum-mullite mold with an arc of 15°. The contact between the fine-grained alumina straight tube and the mold is line contact, and the fine-grained alumina The straight pipe and the mold have a clearance fit, and the height of the mold reaches 1 / 2 of the diameter of the ceramic elbow;

[0011] (2) Put the fine-grained alumina straight tube and the mold into the corresponding shuttle kiln for heating, and when it reaches 1541°C, the alumina straight tube softens;

[0012] (3) Under the action of gravity, the fine-grained alumina straight pipe is slowly embedded on the mold, thereby forming an integral fine-grained alumina bend pipe.

Embodiment 2

[0014] The manufacturing process of the integral fine-grained alumina ceramic elbow, the specific steps are:

[0015] (1) Place the sintered fine-grained alumina straight tube on a U-shaped corundum-mullite mold with a radian of 90°. The contact between the fine-grained alumina straight tube and the mold is line contact, and the fine-grained alumina The straight pipe and the mold have a clearance fit, and the height of the mold reaches 5 / 8 of the diameter of the ceramic elbow;

[0016] (2) Put the fine-grained alumina straight tube and the mold into the corresponding shuttle kiln for heating, and when the temperature reaches 1550°C, the fine-grained alumina straight tube is fired until softened;

[0017] (3) Under the action of gravity, the fine-grained alumina straight pipe is slowly embedded on the mold, thereby forming an integral fine-grained alumina bend pipe.

Embodiment 3

[0019] The manufacturing process of the integral fine-grained alumina ceramic elbow, the specific steps are:

[0020] (1) Place the sintered fine-grained alumina straight tube on a U-shaped corundum-mullite mold with a radian of 165°. The contact between the fine-grained alumina straight tube and the mold is line contact, and the fine-grained alumina The straight pipe and the mold have a clearance fit, and the height of the mold reaches 3 / 4 of the diameter of the ceramic elbow;

[0021] (2) Put the fine-grained alumina straight tube and the mold into the corresponding shuttle kiln for heating, and when it reaches 1570°C, the fine-grained alumina straight tube is fired until softened;

[0022] (3) Under the action of gravity, the fine-grained alumina straight pipe is slowly embedded on the mold, thereby forming an integral fine-grained alumina bend pipe.

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Abstract

The invention belongs to the ceramics field, in particular to a fabrication technology of an entire aplite aluminum oxide ceramics bent pipe, which has the technical scheme that an aplite aluminum oxide ceramics straight pipe is arranged on a U-shaped mould which is matched with the aplite aluminum oxide ceramics straight pipe, the straight pipe and the mould are contacted by lines and are matched by clearance, the height of the mould is 1 / 2 to 3 / 4 of the diameter of the ceramics bent pipe, the straight pipe and the mould are arranged in a shuttle kiln, and the straight pipe is slowly embedded in the mould under gravity action after the ceramics straight pipe is softened. The invention has advantages that the aplite aluminum oxide ceramics bent pipe has no aperture and is comparatively smooth in the process of transporting power, and scouring abrasion in the pipe nipple connector during operation is avoided; the bent pipe is an entirety, no obstacle exists in the transporting process, the self wear-resisting property of the aluminum oxide is good, with little abrasion, the service life of an aluminum oxide elbow is prolonged, and operational maintenance frequency of the device is reduced, which brings better economic benefit to users.

Description

technical field [0001] The invention belongs to the field of ceramics, and in particular relates to a manufacturing process of an integral fine-grained alumina ceramic elbow. Background technique [0002] Alumina ceramics are the most detailed and widely used ceramics in modern ceramics. Alumina ceramics have excellent wear resistance, high temperature strength and oxidation resistance, so they have been more and more widely used, especially in thermal power, It is gradually being used to replace traditional metal and organic materials in the powder conveying system of industries such as iron and steel, smelting, and mining. The ceramic elbow in the existing technology is usually: the inner wall of the steel pipe body is bonded with multiple ceramic elbow nipples or ceramic mosaics, the two ends of the steel pipe body have integral welded joints, and the nipple ends of the ceramic elbow or each There is an adhesive layer around the small magnetic sheet. Its disadvantages a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/64C04B35/111
Inventor 赵友谊崔洪纪淑芸陈勇
Owner JINGANG NEW MATERIALS
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