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Flint clay brick and preparation method

A gemstone, yttrium-mullite technology, applied in the field of refractory materials, can solve the problems of high acid-base atmosphere, high ash concentration, high flow rate, etc., and achieve the effects of anti-flaking, prolonging service life and high service life

Inactive Publication Date: 2014-10-01
山国强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The atmosphere at this part of the calciner is high acid-base atmosphere, high flow rate, high ash concentration, and serious wear, especially due to the erosion of high-speed gas-solid two-phase flow, the wear of this part is very serious

Method used

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  • Flint clay brick and preparation method

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Experimental program
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Effect test

Embodiment 1

[0029] 15 parts of 3~5mm burnt gem aggregate, 30 parts of 1~3mm burnt gem aggregate, 20 parts of 0~1mm burnt gem aggregate, 23 parts of 220 mesh burnt gem fine powder, 5 parts of magnesium iron aluminum tip Crystal pre-synthesized fine powder, 5 parts of yttrium-mullite fine powder, 2 parts of modified Guangxi clay, 9 parts of composite binder, 4 parts of water are mixed and pressed on a 1000-ton friction brick press, and the bulk density of the semi-finished product is 2.10 ~2.30g.cm -3 . After baking at 90°C for 24 hours, the residual moisture of the green body is ≤2%. Firing can be fired in a pusher kiln or a tunnel kiln, and fired at 1350 ° C for 4 hours to obtain the desired burnt gemstone brick.

Embodiment 2

[0031] 10 parts of 3~5mm burnt gemstone aggregate, 36 parts of 1~3mm burnt gemstone aggregate, 15 parts of 0~1mm burnt gemstone aggregate, 26 parts of 220 mesh burnt gemstone fine powder, magnesium iron aluminum spinel pre 6 parts of synthetic fine powder, 6 parts of 320-mesh yttrium-mullite fine powder, 1 part of modified Guangxi mud, 8 parts of composite binder, 5 parts of water are mixed and pressed on a 1000-ton friction brick press, and the bulk density of semi-finished products is 2.1 ~2.3g.cm -3 . After baking at 80°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 1350°C for 3 hours to obtain the desired finished acid and alkali resistant, wear-resistant, heat-shock, and coke-resistant gemstone bricks.

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Abstract

The invention discloses a flint clay brick. The brick comprises the following components in parts by weight: 5 to 15 parts of flint clay aggregate with the diameter of 3 to 5 mm, 30 to 40 parts of flint clay aggregate with the diameter of 1 to 3 mm, 10 to 20 parts of flint clay aggregate with the diameter of 0 to 1 mm, 15 to 25 parts of flint clay fine powder, 5 to 10 parts of hercynite pre-synthesis fine powder, 5 to 7 parts of yttrium mullite fine powder, 1 to 3 parts of modified Guangxi mud, 8 to 10 parts of a composite binding agent, and 4 to 6 parts of water. The invention further discloses a preparation method for the flint clay brick. The flint clay brick is higher in strength and refractoriness, is highly wear-resisting and thermal shock resistant, can prolong the service life by one time or above, is suitable for a dry-method cement kiln decomposing furnace, and is simple in manufacturing technology, and easy to realize.

Description

technical field [0001] The invention belongs to the field of refractory materials, in particular to a burnt gemstone brick for a cement kiln decomposition furnace and a manufacturing method thereof. Background technique [0002] In the new dry process cement kiln, the calciner is one of the most critical components, and the refractories used in these parts must have good acid and alkali resistance, wear resistance and thermal shock stability. Anti-stripping high-alumina bricks or high-alumina castables are most commonly used in these parts. The part of the decomposition furnace has a high acid-base atmosphere, high flow rate, high ash concentration, and serious wear, especially due to the erosion of high-speed gas-solid two-phase flow, the wear of this part is very serious. Contents of the invention [0003] The purpose of this invention is to overcome the above deficiencies, and the technical problem to be solved is to provide an acid and alkali-resistant, wear-resistant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 山国强周宁生
Owner 山国强
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