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Tile with thermal shock resistance, pressure resistance and acid resistance as well as its manufacturing method

A technology of thermal shock resistance and pressure resistance, which is applied in the field of ceramic tiles and its production, can solve the problems of increasing the corrosion area of ​​strong acid medium, failing to meet technical requirements, reducing acid corrosion resistance, etc., achieving good chemical stability and excellent resistance to rapid cooling Rapid heat performance, the effect of overcoming poor corrosion resistance

Inactive Publication Date: 2012-11-21
邓宗禹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although traditional acid-resistant tiles have good acid corrosion resistance and certain mechanical strength, they are poor in resistance to sudden temperature changes and cannot meet the technical requirements of the autoclave lining for this project.
At present, domestic autoclaves and some imported autoclaves use pottery bricks, which can improve the resistance to sudden temperature changes of bricks to a certain extent by using more pores in the body of the pottery bricks, but this improvement is very limited.
At the same time, because of the large porosity of ceramic bricks, the corrosion area of ​​bricks by strong acid medium is increased, the acid corrosion resistance of bricks is reduced, and the mechanical properties of bricks are significantly reduced, and the aging of bricks is accelerated, thereby shortening the life of bricks. service life

Method used

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  • Tile with thermal shock resistance, pressure resistance and acid resistance as well as its manufacturing method
  • Tile with thermal shock resistance, pressure resistance and acid resistance as well as its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: Prepare raw materials according to the following weight percentage distribution ratio, containing Al 2 o 3 40wt% of gangue-40, cordierite-5, mullite-5, containing Al 2 o 3 15wt% of clay-8, fused quartz 40, lithium feldspar 2, according to the production process, carry out pulverization—mixing—stale—dry powder making—dry pressing molding—firing. After testing, the fired tiles are water-cooled at 1200-25°C for 5 times without cracking. Its coefficient of thermal expansion is 0.92×10 -6

Embodiment 2

[0032] Embodiment 2: prepare raw materials according to the following weight percentage distribution ratio, containing Al 2 o 3 48wt% coal gangue-30, cordierite-10, mullite-15, containing Al 2 o 317wt% of clay-10, fused quartz 30, and lithium feldspar 5, according to the production process, it is pulverized—mixed—stale—dried powder—dry pressing—fired. After testing, the fired tiles are water-cooled for 5 times at 1200°C to 25°C without cracking. Its coefficient of thermal expansion is 1.1×10 -6 .

[0033] The dimensional deviation and deformation of the heat-resistant and acid-resistant bricks produced by high-pressure pressing are very small, which fully meet the specific requirements of the national standard JC / T424-2005 "Acid-resistant and heat-resistant bricks". The specific content is shown in the following table:

[0034] Table 3. Acid resistance temperature deviation and deformation

[0035] Unit: mm

[0036]...

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Abstract

The invention relates to a tile with thermal shock resistance, pressure resistance and acid resistance, which is prepared by processing the raw material raw materials of coal gangue, cordierite, mullite, clay containing 15-18wt% of Al2O3, fused silica and lithium feldspar. The coal gangue is used after calcining and milling, the invention is characterized in that the weight percentage of the raw materials comprises: 30-40 parts of coal gangue, 5-10 parts of cordierite, 5-20 parts of mullite, 5-15 parts of clay, 2-5 parts of lithium feldspar and 30-50 parts of fused silica, the method comprises the following steps: weighting the raw materials, crushing, mixing, aging, drying and pulverizing, dry-pressing moulding and roasting to obtain the product, wherein the thermal expansion coefficient can reach 0.92-1.2*10<-6>. The tile of the invention can be widely used in a high pressure autoclave, and possesses sharp quenching and sharp heating characteristics, and has the advantages of long service life and the like.

Description

[0001] Field [0002] The invention relates to ceramic tiles and a manufacturing method thereof, in particular to a heat-shock-resistant, pressure-resistant and acid-resistant ceramic tile used in an autoclave and a manufacturing method thereof. Background technique [0003] From the outside to the inside of the autoclave, there are generally shell steel plates, anti-corrosion lead layers (about 6mm thick), anti-corrosion diaphragms, and two layers of acid-resistant bricks lined (the thickness of the outer layer of bricks is 50mm, and the thickness of the inner layer of bricks is 114mm). The surface temperature between the cement and the anti-corrosion diaphragm layer shall not exceed 110°C. [0004] When the autoclave is working normally, the inside of the autoclave is generally in a state of high pressure and high temperature. For example, the working pressure of the autoclave is 1.6Mpa, and the working temperature is 150°C; the design pressure is 2.0Mpa, and the design tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/622
Inventor 邓宗禹
Owner 邓宗禹
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