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Long-service-life honeycomb heat accumulator

A heat storage body and life-span technology, which is applied in the field of silicate material production, can solve problems such as unreasonable formula and short service life, and achieve the effects of easy control of the production process, reduced production costs, and good thermal stability

Active Publication Date: 2013-03-20
山西科德垣环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of short service life caused by the unreasonable formula of existing products, and provide a honeycomb heat storage body with long service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The weight percentage of raw materials: alumina 62%, zircon 17%, Datong soil 12%; flux: magnesia 1.5%, silica powder 1.8%; binder polyvinyl alcohol 2.5%; glycerin 3.2%. Alumina is calcined at 1450-1500°C after adding mineralizers such as boric acid. The main crystal phase is a-phase alumina, the true density is 3.98 g / cm3, and the alumina content is ≥99.8%. The chemical composition of zircon is: 60%-65% zirconia; 30%-35% silicon oxide, and <1% aluminum oxide. The chemical composition of Datong soil is: alumina 33%-37%, silicon oxide 45%-50%, iron oxide <1.5%. Flux magnesium oxide and silicon micropowder are ground into 0.2um micropowder.

[0018] The above raw materials are fully mixed into mud, which is formed after vacuum kneading, dried at 150°C for 10-15 hours, and fired in a high-temperature furnace at 1350°C-1450°C for 4-5 hours, before 800°C during the firing process It is a reduction flame, and it becomes an oxidation flame after 800°C until the end of firing,...

Embodiment 2

[0020] The weight percentage of raw materials: alumina 85%, zircon 8%, Datong soil 3%; flux: magnesia 0.5%, silicon powder 0.6%; binder polyvinyl alcohol 0.8%; glycerin 2.1%. The above raw materials are fully mixed into mud, which is formed after vacuum kneading, dried at 150°C for 10-15 hours, and fired in a high-temperature furnace at 1350°C-1450°C for 4-5 hours, before 800°C during the firing process It is a reduction flame, and it becomes an oxidation flame after 800°C until the end of firing, and a honeycomb regenerator whose main crystal phase is corundum is formed.

Embodiment 3

[0022] The weight percentage of raw materials: 70% alumina, 12% zircon, 10% Datong soil; flux: 1% magnesium oxide, 1.5% silica powder; 2% binder cellulose; 3.5% glycerin. Alumina is calcined at 1450-1500°C after adding mineralizers such as calcium fluoride. The main crystal phase is a-phase alumina, the true density is 3.98 g / cm3, and the alumina content is ≥99.8%. The chemical composition of zircon is: 60%-65% zirconia; 30%-35% silicon oxide, and <1% aluminum oxide. The chemical composition of Datong soil is: alumina 33%-37%, silicon oxide 45%-50%, iron oxide <1.5%. Flux magnesium oxide and silicon micropowder are ground into 0.2um micropowder.

[0023] The above raw materials are fully mixed into mud, which is formed after vacuum kneading, dried at 150°C for 10-15 hours, and fired in a high-temperature furnace at 1350°C-1450°C for 4-5 hours, before 800°C during the firing process It is a reduction flame, and it becomes an oxidation flame after 800°C until the end of firing...

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Abstract

The invention relates to a production method of silicate, and provides a long-service-life honeycomb heat accumulator, which is used for solving the problem of short service life caused by the conventional unreasonable product formula. The long-service-life honeycomb heat accumulator is prepared from the following raw materials in percentage by weight: 62-85 percent of aluminum oxide, 8-17 percent of zirconite, 3-12 percent of Datong clay, 0.5-1.5 percent of magnesia serving as a fluxing agent, 0.6-1.8 percent of silicon micropowder, 0.8-2.5 percent of bonding agent and 1.5-3.5 percent of glycerol. The method comprises the following steps of: fully mixing the raw materials into pug; mulling the pug in vacuum, and molding; drying at the temperature of 150 DEG C for 10-15 hours; and firing in a high-temperature furnace at the temperature of 1,350-1,450 DEG C for 4-5 hours to generate a honeycomb heat accumulator of which the main crystal phase is corundum, wherein reducing flame is adopted at the temperature of below 800 DEG C in the firing process, and oxidizing flame is adopted at the temperature of over 800 DEG C to the end of the firing process. The production process is easy to control, and the honeycomb heat accumulator has the advantages of high thermal stability and high strength.

Description

technical field [0001] The invention belongs to the field of silicate material production, in particular to a honeycomb regenerator used in a regenerative industrial furnace. Background technique [0002] The honeycomb regenerator is the core of high-temperature air combustion technology and a key component for heat exchange in regenerative industrial furnaces. At present, the main problem existing in the use of domestic honeycomb heat storage body is: due to the unreasonable composition of raw materials and auxiliary materials for the production of honeycomb heat storage body, the service life of the honeycomb heat storage body on the regenerative heating furnace stays at At the level of 3-6 months, the user manufacturer has to shut down the furnace frequently due to the replacement of the honeycomb heat storage body and the resulting cost is high, thus affecting the maximum performance of the heating furnace's energy-saving and environmental protection benefits. Therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/10C04B35/622
Inventor 张剑仲张元友
Owner 山西科德垣环保材料有限公司
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