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Chromium zirconium corundum mullite brick suitable for burning of waste liquid and wastes of petrochemical industry

A technology of industrial waste liquid and zirconium chromium corundum, which is applied in the field of refractory materials, can solve the problems of high alumina brick peeling, tissue damage, secondary pollution, etc., and achieve the effects of long service life, peeling resistance and good high temperature strength

Inactive Publication Date: 2013-07-17
JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When high chromium corundum bricks exist in an oxidizing atmosphere and a large amount of alkaline oxides, under certain temperature conditions, it is easy to cause secondary pollution. High alumina bricks will expand and react with alkali, resulting in tissue destruction and cracks. Aluminum brick peeling and severe damage

Method used

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  • Chromium zirconium corundum mullite brick suitable for burning of waste liquid and wastes of petrochemical industry
  • Chromium zirconium corundum mullite brick suitable for burning of waste liquid and wastes of petrochemical industry
  • Chromium zirconium corundum mullite brick suitable for burning of waste liquid and wastes of petrochemical industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 6 parts of 3~5mm synthetic mullite aggregate, 24 parts of 1~3mm synthetic mullite aggregate, 12 parts of 1~3mm synthetic zirconia corundum aggregate, 13.5 parts of 0.1~1mm synthetic mullite aggregate, 8 Parts of corundum fine powder, 15 parts of α-alumina fine powder, 7.5 parts of Cr 2 o 3 Fine powder, 14 parts of composite binder, 5.6 parts of water; after kneading, it is pressed on a 3150KN friction brick press, and the bulk density of the semi-finished product is 3.15-3.35g / cm 3 , After baking at 110°C for 24 hours, the residual moisture of the green body is ≤2%. After firing, it can be fired in a pusher kiln or a tunnel kiln, and fired at 1560-1610°C for 3.5 hours to obtain the desired finished zirconium-chromium corundum mullite brick.

Embodiment 2

[0025] 10 parts of 3~5mm synthetic mullite aggregate, 20 parts of 1~3mm synthetic mullite aggregate, 14 parts of 1~3mm synthetic zirconia corundum aggregate, 12 parts of 0.1~1mm synthetic mullite aggregate, 10 parts Part corundum fine powder, 12 parts α-alumina fine powder, 6 parts Cr 2 o 3 Fine powder, 16 parts of composite binder, 4.7 parts of water; after kneading, it is pressed in a 3150KN friction brick press, and the bulk density of the semi-finished product is 3.15-3.35g / cm 3 , After baking at 80°C for 48 hours, the residual moisture of the green body is ≤2%. After firing, it can be fired in a pusher kiln or a tunnel kiln, and fired at 1560-1610°C for 3.5 hours to obtain the desired finished zirconium-chromium corundum mullite brick.

Embodiment 3

[0027] 7 parts of 3-5mm synthetic mullite aggregate, 22 parts of 1-3mm synthetic mullite aggregate, 15 parts of 1-3mm synthetic zircon corundum aggregate, 13 parts of 0.1-1mm synthetic mullite aggregate, 11 Part corundum fine powder, 13 parts α-alumina fine powder, 7 parts Cr 2 o 3 Fine powder, 12 parts of composite binder, 4.5 parts of water; after kneading, it is pressed in a 3150KN friction brick press, and the bulk density of the semi-finished product is 3.15-3.35g / cm 3 , After baking at 90°C for 36 hours, the residual moisture of the green body is ≤2%. Firing can be fired in pusher kiln or tunnel kiln, and fired at 1560-1610°C for 4 hours to obtain the desired finished zirconium-chromium corundum mullite brick.

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Abstract

The invention discloses a refractory material, especially a chromium zirconium corundum mullite brick suitable for burning of waste liquid and wastes of petrochemical industry. The mullite brick is characterized by comprising synthetic mullite aggregate, synthetic corundum aggregate, corundum fine powder, alpha-alumina micropowder, a composite binder, Cr2O3 fine powder and water. According to a formula amount, the materials is mixed by using a planetary mixer and molded by pressing, and the molded adobe is fired under 80-110 DEG C for 24-48 hours, and roasted under 1560-1610 DEG C for 3.5-4.5 hours. The invention further discloses a preparation method of the chromium zirconium corundum mullite brick. The invention is beneficial in that the chromium zirconium corundum mullite brick is relatively high in refractoriness and high-temperature intensity, and has excellent performances of erosion resistance, thermal shock resistance, stripping resistance, and low creep deformation. The brick is suitable for inner liners of a waste liquid incinerator of the petrochemical industry and a waste incinerator of a rotary kiln industry, and is simple in technology and easy to realize the manufacture.

Description

technical field [0001] The invention relates to a refractory material, in particular to a zirconium chromium corundum mullite brick suitable for petrochemical industry waste liquid and waste incineration and a manufacturing method thereof. Background technique [0002] The waste liquid and waste liquid in the petrochemical industry have complex components, and many problems will be encountered in the process of treatment. The waste liquid and waste liquid often contain a certain concentration of acid and alkali, as well as sodium salt and some heavy metal components. Other industrial waste , in the process of treatment, the composition of waste liquid treatment in petrochemical industry is similar. For the treatment of waste liquid in petrochemical industry and other industrial wastes, incinerators are generally used for incineration treatment. During the process, due to the complex composition of waste liquid and waste, high water content, certain acid-base concentration, a...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 刘克毛荣新白元峰毛小平王宏巩传志张木兰毛荣棠毛俊良倪云峰王巍孙亚娣唐玉梅刘佩铭苑颖邓国峰
Owner JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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