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Acid resistant prefabricated component for carbonization furnace

A technology of prefabricated parts and carbonization furnaces, which is applied in the field of refractory materials, can solve problems such as lining erosion of carbonization furnaces, and achieve the effects of high-temperature acid corrosion resistance, extended service life, and appropriate strength

Inactive Publication Date: 2015-08-12
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides an acid-resistant prefabricated part for a carbonization furnace, aiming to solve the problem that the flue gas generated during the pyrolysis carbonization process seriously corrodes the inner lining of the carbonization furnace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] An acid-resistant prefabricated part for a carbonization furnace, comprising 20 parts by mass of mullite of 5-8 mm, 10 parts of burnt gemstone of 3-5 mm, 15 parts of burnt gemstone of 1-3 mm, and 6 parts of burnt gemstone of 0-1 mm , 10 parts of alumina hollow spheres of 0.2-1 mm, 15 parts of silicon carbide powder not larger than 200 mesh, 5 parts of coke powder not larger than 200 mesh, 5 parts of calcium aluminate cement, 5 parts of alumina powder, 4 parts of silicon micropowder, 0.10 part of water reducer, 0.02 part of explosion-proof fiber. The mullite is sintered mullite, and Al in the sintered mullite 2 o 3 The mass percentage content ≥ 68%. Al in the calcium aluminate cement 2 o 3 The mass percentage content ≥ 68%. SiO in the microsilica powder 2 The mass percentage content ≥ 94%.

[0015] After mixing various raw materials in proportion, adding 5% water by weight and stirring evenly, then pouring into a mould, curing and drying after demoulding to obtain...

Embodiment 2

[0017] The difference from other embodiments is that: according to the mass parts, it includes 10 parts of 5-8mm mullite, 15 parts of 3-5mm coke gem, 10 parts of 1-3mm coke gem, 10 parts of 0-1mm coke Gemstones, 25 parts of alumina hollow spheres of 0.2-1mm, 8 parts of silicon carbide powder not larger than 200 mesh, 10 parts of burnt gemstone powder not larger than 200 mesh, 3 parts of calcium aluminate cement, 3 parts of alumina powder, 6 parts of silicon micropowder , 0.15 parts of water reducing agent, 0.01 parts of explosion-proof fiber.

[0018] Various raw materials are prepared and mixed according to the proportion, and then 7% by mass of water is added to stir evenly, and then poured into a mould, and after demolding, curing and drying are performed to obtain an acid-resistant prefabricated part for a carbonization furnace.

Embodiment 3

[0020] The difference from other embodiments is: according to the mass parts, it includes 15 parts of mullite of 5-8 mm, 12 parts of coke gem of 3-5 mm, 12 parts of coke gem of 1-3 mm, and 5 parts of coke of 0-1 mm. Gemstones, 22 parts of alumina hollow spheres of 0.2-1mm, 11 parts of silicon carbide powder not larger than 200 mesh, 8 parts of burnt gemstone powder not larger than 200 mesh, 5 parts of calcium aluminate cement, 5 parts of alumina powder, 5 parts of silicon micropowder , 0.10 parts of water reducing agent, 0.02 parts of explosion-proof fiber.

[0021] Various raw materials are prepared and mixed according to the proportion, and then water with a mass percentage of 5.7% is added to stir evenly.

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Abstract

The invention provides an acid resistant prefabricated component for a carbonization furnace, aims to solve the problem of severe erosion of the flue gas generated in the pyrolysis charing process on the inner liner of the carbonization furnace. The acid resistant prefabricated component comprise, by weight, 10-20 parts of 5-8mm mullite, 10-15 parts of 3-5mm of flint clay, 10-15 parts of 1-3mm flint clay, 5-10 parts of 0-1mm of flint clay, 10-25 parts of 0.2-1mm alumina hollow ball, 8-15 parts of silicon carbide powder no more than 200 mesh, 5-10 parts of flint clay powder no more than 200 mesh, 3-5 parts of calcium aluminate cement, 3-5 parts of alumina powder, 4-6 parts of silicon powder, 0.10-0.15 part of a water reducing agent and 0.01-0.02 part of explosion-proof fibers. The acid resistant prefabricated component for carbonization furnace prepared by the invention has good high-temperature acid erosion resistance, suitable strength, low thermal conductivity and excellent thermal shock resistance, can withstand the erosion of strong acidic gases produced in the pyrolysis carbonization process such as nitrogen oxides, sulfur oxides, hydrogen chloride and partial hydrogen fluoride, takes into account of the performance requirements of product strength and thermal conductivity, and can significantly prolong the service life of the carbonization furnace.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to an acid-resistant preform for a carbonization furnace. Background technique [0002] Pyrolytic carbonization technology uses high temperature under anaerobic conditions to pyrolyze organic components to form solid carbonized products. During the pyrolytic carbonization process, a large amount of strong acids such as nitrogen oxides, sulfur oxides, carbon oxides, hydrogen chloride, and hydrogen fluoride will be produced. Gas, coupled with the action of high-temperature water vapor, produces flue gas that severely corrodes the lining of the carbonization furnace. At present, there are very few researches directly on the lining materials of carbonization furnaces, and most of them directly use the materials used in other fields as the lining materials of carbonization furnaces. High-alumina castables can meet the requirements of carbonization furnaces in terms of strength and we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王立旺常正钦朱国平王琪李新明
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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