Method for making rotary pipe

A rotary tube and grouting molding technology, which is applied in glass manufacturing equipment, manufacturing tools, glass molding, etc., can solve the problems of uneven density distribution, limited use range, low compressive strength, etc., and achieve strong production continuity, Improved service life and low porosity

Inactive Publication Date: 2003-10-29
ZIBO GT INDAL CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing rotary tube is made of sillimanite, mullite and water glass binder, and the molding method adopts the grouting method and the ramming molding method, and the product has the following defects: (1) The firing shrinkage is large, and the product deformation is large; (2) The density distribution is uneven, the top and bottom are dense, and the product quality is poor; (3) The porosity is high, 21-25%, the density is small, the compressive strength is low, only 30-40MPa, the erosion resistance is poor, and the service life is short
Because of this, the existing rotary tubes are generally small in size, with a diameter of less than 200mm and a length of less than 1000mm, so the scope of use is greatly limited

Method used

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with embodiment.

[0020] The rotary tube of the present invention, the test batching weight composition is: 35-50% of sintered alumina, 30-40% of mullite, 15-25% of plastic clay, 2.5-3% of additional binder, 7-9% of water .

[0021] The binder is composed of ammonia water and sodium hydroxide, and the weight ratio of ammonia water to sodium hydroxide is 30-35:1.

[0022] The preparation method control parameters are respectively:

[0023] The weight gradation of mullite and alumina granules in the batching is:

[0024] Coarse material: 1mm

[0025] Medium coarse material: 0.15mm

[0026] Fine material: powder with d≤0.15 35~50%

[0027] The vacuum degree of vacuum treatment is 0.094~0.098MPa;

[0028] The pressure of grouting molding is 70~120Kg / cm 2 ;

[0029] The curing humidity is 70-90 degrees...

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Abstract

A process for preparing the rotary tube used to prepare glass tube includes proportionally mixing raw materials to become sludge, vacuumizing, pressure moulding for shaping, and firing. Its advantages are high quality, resistance to heat shock and corrosion, density, strength and size precision, big diameter and long service life.

Description

technical field [0001] The invention relates to a method for preparing a rotary tube for producing glass tubes. Background technique [0002] The rotating tube is a special tool for producing glass tubes, and its quality directly affects the quality of the glass tubes. The existing rotary tube is made of sillimanite, mullite and water glass binder, and the molding method adopts the grouting method and the ramming molding method, and the product has the following defects: (1) The firing shrinkage is large, and the product deformation is large; (2) The density distribution is uneven, the top and bottom are dense, and the product quality is poor; (3) The porosity is high, 21-25%, the density is small, the compressive strength is low, only 30-40MPa, the erosion resistance is poor, and the service life is short . Because of this, the existing rotating tubes are generally small in size, with a diameter of less than 200mm and a length of less than 1000mm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B17/04C04B35/18C04B35/185C04B35/622
CPCY02P40/57
Inventor 张启山孙兆刚张瑛董田有蒋绪贵
Owner ZIBO GT INDAL CERAMICS
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