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Coating material preventing carbon deposition of coke oven and method for making same

A coating material and furnace door technology, which is applied in the heating of coke ovens, doors/closures of coke ovens, coatings, etc., can solve the problems of unsuitable glaze, low melting point of glaze, etc., and achieve thermal shock resistance and stability Excellent properties, high glaze hardness, and long-term durability

Active Publication Date: 2008-03-05
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the glaze of this Chinese patent cannot be applied to the cordierite-mullite coating of the coke oven door, and the glaze of this invention must be melted in advance, and the final firing temperature is below 1000°C. Glaze has a low melting point

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Select raw materials of the following specifications:

[0026] Li in lepidolite 2 O≥3.5%, fineness 2 O+Na 2 O is 11-15%, K 2 O:Na 2 O>2, Fe 2 o 3 +TiO 2 2 ≥60%, fineness 2 o 3 ≥35%, fineness ≤0.045mm; Al in activated alumina powder 2 o 3 ≥98%, the average diameter of powder 2 ≥95%, fineness <0.088mm.

[0027] The embodiment coating material that will meet above requirement is according to following table proportioning:

[0028] The composition of table 1 embodiment

[0029] Raw materials and specifications

Example, wt%

1

2

3

Lepidolite <0.1mm

35

45

55

Potassium feldspar <0.088mm

15

10

5

Talc <0.088mm

20

15

10

Activated alumina powder <8μm

5

7

3

Soft clay <0.045mm

15

16

22

Quartz powder <0.088mm

10

7

5

Sodium carboxymethyl cellulose

+1.0

+0.5

+0.3

water glass solution

+3

+5

+7

...

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PUM

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Abstract

The present invention relates to one kind of refractory coating material and its preparation process. The coating material is prepared with lepidolite 35-55 wt%, potassium feldspar 5-15 wt%, talcum powder 10-20 wt%, soft clay 15-25 wt%, active alumina powder 3-7 wt%, and quartz powder 5-10 wt%, and through mixing into slurry after being added with sodium carboxymethyl cellulose 0.3-1.0 wt%, water glass solution 3-7 wt% and water 30-40 wt%, painting or spraying onto the lining of furnace, drying and sintering at 1200-1300 for 4-12 hr. The refractory coating material has obvious carbon preventing effect, high durability, heat expansion performance similar to that door material of coke oven and other advantages.

Description

technical field [0001] The invention relates to a refractory coating material and a preparation method thereof, in particular to a coating material for preventing coke oven doors from being carbonized and a preparation method thereof. Background technique [0002] Coke oven doors have used a variety of refractory materials, such as clay bricks, cordierite bricks, fused silica bricks and clay castables, clay-cordierite castables, etc., but the primary performance of coke oven door refractories is to resist Good thermal shock resistance and anti-coking, when removing carbon, it not only requires hard work, but also brings environmental pollution problems. The treatment method for the carbonation problem of the furnace door can be to add a surface coating to the inner lining. After the surface coating treatment, the surface porosity will decrease and it will be impermeable to foreign impurities, thereby preventing or reducing the carbonation on the surface of the furnace door. ...

Claims

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Application Information

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IPC IPC(8): C09D1/00C10B25/02C10B43/00
Inventor 甘菲芳程乐意徐志栋田守信姜伟忠
Owner BAOSHAN IRON & STEEL CO LTD
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