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

A technology for coating materials and furnace doors, applied in the heating of coke ovens, doors/closers of coke ovens, coatings, etc., can solve the problems of low melting point of glazes and inapplicability of glazes, and achieve high hardness of glazed surfaces , Excellent thermal shock resistance and good long-term durability

Active Publication Date: 2009-12-09
BAOSHAN IRON & STEEL CO LTD
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  • Description
  • Claims
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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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  • Coating material preventing carbon deposition of coke oven and method for making same

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Embodiment Construction

[0025] Select raw materials of the following specifications:

[0026] Li in lepidolite 2 O≥3.5%, fineness2 O+Na 2 O is 11-15%, K 2 O:Na 2 O>2, Fe 2 o 3 +TiO 2 2 ≥60%, fineness2 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]

[0030] The above mixture is stirred to form a slurry, which is manually applied or sprayed on the inner lining substrate of the furnace door with special equipment, and the thickness of the coating is controlled at 1.5-3.0mm. After natural drying and firing, the surface of the furnace door can form a solid, smooth and dense enamel layer with excellent thermal shock resistance and obvious anti-carbon effect. The conditions for the coating material to form a glaze layer are also very fle...

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Abstract

The invention relates to a refractory coating material and a preparation method thereof. The main raw material weight ratio of the coating material is: lepidolite 35-55%, potassium feldspar 5-15%, talcum powder 10-20%, soft clay 15-25%, activated alumina powder 3-7%, quartz powder 5-10%. When preparing this coating material, add sodium carboxymethyl cellulose + 0.3-1.0%, water glass solution + 3-7%, water + 30-40%, stir the above mixture into a uniform slurry, smear or spray On the lining material of the furnace door, after drying, it can be obtained by firing at 1200°C to 1300°C for 4 to 12 hours. The invention provides a coke oven door refractory coating material with remarkable anti-carbonization effect and long-term durability and its preparation method. The coating material is close to the matrix material in composition and has similar thermal expansion performance, so it is not easy to use in use. Flaking can be pre-fired in advance or directly form a glaze during use, which reduces the labor intensity of workers and environmental pollution during carbon removal.

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 various 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 refractory materials 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 doo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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