Corundum mullite brick for high-temperaturehigh sulfur petroleum cokecalcining furnace

A high-temperature calcination and mullite brick technology, which is applied in the field of high-temperature calcination equipment, can solve problems such as tank furnace damage and calcination temperature aggravation, and achieve the effects of enhancing erosion resistance, improving surface properties, and blocking erosion reactions

Inactive Publication Date: 2015-03-25
SHANDONG WANQIAO GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the erosion process will be sharply aggravated with the increase of sulfur content of petroleum coke and the increase of calcination temperature, resulting in damage to the tank furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The raw materials of the brick body are composed of 35 parts by weight of mullite particles, 8 parts of mullite powder, 8 parts of fused white corundum, 8 parts of andalusite, 5.5 parts of sillimanite, 5.5 parts of Suzhou soil, and 4.5 parts of α-alumina.

[0017] The physical and chemical indicators of the fired bricks are: SiO 2 The mass percentage content is 17.3%, Al 2 O 3 The mass percentage content is 82.2%, the mass percentage content of other substances is 0.5%, the porosity is 15.51%, the compressive strength at room temperature is 83.0MPa, the softening temperature under load is 1653°C, and the thermal expansion ratio is 0.52. The high temperature stable crystal phase in the brick body accounts for 99.3%.

[0018] The raw materials of the surface high-temperature glaze layer are composed of 20 parts by weight of feldspar, 30 parts of quartz, 5.5 parts of stalactite, 15 parts of cooked talc, 20 parts of Suzhou soil, 4.5 parts of alumina, 16.5 parts of zircon...

Embodiment 2

[0022] The raw materials of the brick body are composed of 30 parts by weight of mullite particles, 8 parts of mullite powder, 8 parts of fused white corundum, 8 parts of andalusite, 8 parts of sillimanite, 8 parts of Suzhou soil, and 6 parts of α-alumina.

[0023] The physical and chemical indicators of the fired bricks are: SiO 2 The mass percentage content is 14.6%, Al 2 O 3 The mass percentage content is 84.98, the mass percentage content of other substances is 0.42%, the porosity is 15.3%, the compressive strength at room temperature is 81.3MPa, the softening temperature under load is 1650°C, and the thermal expansion ratio is 0.53. The high-temperature stable crystal phase in the brick body accounts for 99.2%.

[0024] The raw materials of the surface high-temperature glaze layer are composed of 23 parts by weight of feldspar, 38 parts of quartz, 4.5 parts of stalactite, 17 parts of cooked talc, 23 parts of Suzhou soil, 6 parts of alumina, 14 parts of zircon powder, a...

Embodiment 3

[0028] The raw materials of the brick body are composed of 40 parts by weight of mullite particles, 8 parts of mullite powder, 6 parts of fused white corundum, 6 parts of andalusite, 7 parts of sillimanite, 7 parts of Suzhou soil, and 4 parts of α-alumina; The physical and chemical indicators of the fired brick body are: SiO 2 The mass percentage content is 20.11%, Al 2 O 3 The mass percentage content is 79.78, the mass percentage content of other substances is 0.11%, the porosity is 15.7%, the compressive strength at room temperature is 81.9MPa, the softening temperature under load is 1652°C, and the thermal expansion ratio is 0.51.

[0029] The raw materials of the high-temperature glaze layer on the surface are composed of 25 parts by weight of feldspar, 25 parts of quartz, 4 parts of stalactite, 14 parts of cooked talc, 21 parts of Suzhou soil, 1.5 parts of alumina, 23 parts of zircon powder, and 2 parts of ceria .

[0030]The surface of the brick body is glazed by coa...

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Abstract

The invention discloses a corundum mullite brick for a high-temperature high sulfur petroleum coke calcining furnace, belonging to the technical field of high-temperature calcining equipment. The corundum mullite brick comprises a surface enamel layer and an internal brick body, and is characterized in that the brick body is prepared by taking mullite as particle materials and taking mullite powder, fused white corundum powder, andalusite, sillimanite and Suzhou clays as fine powder materials; modified alpha-aluminum oxide powder is added, and the total mass ratio of the particle materials to the fine powder materials is 25-45 to 22-54. A high-temperature stable crystalline phase in the internal structure of the brick body comprises mullite (3Al2O3.2SiO2) and corundum; a working surface at whichthe brick is in direct contact with petroleum is coated with a special high-temperature glaze with high abrasion resistance and high corrosion resistance, and a dense permeable layerof the glaze on the surface of the brick body reaches about 5mm. According to the brick body structure, the erosion resistance capability of the high sulfur petroleum coke on a tank type calcining furnace in the high-temperature calcining process is improved, and the abrasion capability of the tank body in the high sulfur petroleum coke calcining process is improved at the same time.

Description

technical field [0001] The invention relates to a corundum mullite brick for a high-sulfur petroleum coke high-temperature calcination furnace, which belongs to the technical field of high-temperature calcination equipment. Background technique [0002] Petroleum coke (PETroleum coke) is a product obtained by distilling crude oil to separate light and heavy oil, and then thermally cracking the heavy oil. In recent years, the sulfur content of petroleum coke has gradually increased, and the sulfur content of some high-sulfur coke has reached more than 6%. Petroleum coke calcination is one of the main processes in the production of aluminum anodes. Its purpose is to eliminate the volatile content of raw materials and improve the density, mechanical strength, electrical conductivity and chemical stability of raw materials. During the calcination process, petroleum coke changes from elemental composition to organizational structure, and the physical and chemical properties of r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B41/86
Inventor 张新年高建立孙煜钱玉东张新成
Owner SHANDONG WANQIAO GROUP
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