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Anti-oxidation coating for working lining of iron ditch and preparation method thereof

An anti-oxidation coating and working lining technology is applied in the field of preparation of blast furnace iron trench protective materials, and can solve the problems affecting the thermal shock resistance stability of iron and iron trench linings, deterioration of structural strength, and shortening of service life of iron trench inner linings, etc. , to achieve the effect of improving service life, good protection and not easy to fall off

Active Publication Date: 2021-06-22
武汉市科达耐火有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon raw material in the castable is basically amorphous carbon, which will be oxidized in the oxidizing atmosphere at this baking temperature, resulting in poor thermal shock resistance and structural strength of the lining of the iron trench, and eventually leads to The service life of the lining is shortened, which affects the iron production

Method used

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  • Anti-oxidation coating for working lining of iron ditch and preparation method thereof
  • Anti-oxidation coating for working lining of iron ditch and preparation method thereof
  • Anti-oxidation coating for working lining of iron ditch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: An anti-oxidation coating for iron ditch working lining, the content of the formula components is shown in Table 1. Wherein the carpentry glue adopts polyvinyl acetate adhesive, its viscosity is 500cps, pH value is 4, and solid content is 40%. Among them, the fixed carbon content of carbon black is 99.8%, and the particle size d1 is 250nm; the fixed carbon content of coke powder is 90%, and the particle size d2 satisfies 0<d2≤1nm; the light-burned magnesium oxide is in powder form and the particle size d3 is 180 mesh. The preparation method of the anti-oxidation coating for the working lining of the iron ditch comprises the following steps:

[0035] S1. Ammonium acetate is dissolved in water to form an aqueous solution of ammonium acetate;

[0036] S2. Stir the wood glue at a speed of rotating speed v=120r / min, add brown sugar, light-burned magnesia, aluminum powder, coke powder and carbon black while stirring in order to form an initial mixture;

[0037] S3....

Embodiment 2

[0038] Example 2: An anti-oxidation coating for the working lining of iron trenches. The difference between this example and Example 1 lies in that the content of the formula components in this example is shown in Table 1. Wherein the carpentry glue adopts polyvinyl acetate adhesive, its viscosity is 600cps, pH value is 5, and solid content is 45%.

Embodiment 3

[0039] Example 3: An anti-oxidation coating for working lining of iron trenches. The difference between this example and Example 1 is that the content of the formula components in this example is shown in Table 1. Wherein the carpentry glue adopts polyvinyl acetate adhesive, its viscosity is 700cps, pH value is 6, and solid content is 50%.

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Abstract

The invention discloses an anti-oxidation coating for iron ditch working lining and a preparation method thereof, and relates to the technical field of preparation of blast furnace iron ditch protective materials. Its formula includes the following weight components: 50-60 parts of wood glue, 15-20 parts of brown sugar, Lightly burned magnesia 40-66 parts, carbon black 2-4 parts; water 40-45 parts. The preparation method of the anti-oxidation coating for the working lining of the iron ditch includes the following steps: S1. dissolving ammonium acetate in water to form an ammonium acetate aqueous solution; S2. stirring the wood glue at a speed of v=120r / min, and stirring in sequence Add brown sugar, lightly burned magnesia, aluminum powder, coke powder and carbon black to form a primary mixture; S3. add the ammonium acetate aqueous solution prepared in the S1 step while stirring to the primary mixture obtained in the S2 step, and stir Uniformly obtained finished paint. The invention has the technical effect of reducing the oxidation degree of carbon in the pouring material of the working lining of the iron trench, thereby improving the working performance of the lining of the iron trench and prolonging the service life of the lining of the iron trench.

Description

technical field [0001] The invention relates to the technical field of preparation of blast furnace iron ditch protective materials, in particular to an anti-oxidation coating for iron ditch working lining and a preparation method thereof. Background technique [0002] Blast furnace tapping trough, also called iron trough, is a channel for leading out high-temperature molten iron or slag, and is also an important part of the blast furnace. The inner lining of blast furnace tapping hook generally includes permanent lining and working lining. At present, there are mainly two kinds of working lining: one is integrally poured with castables, and the other is built with high alumina bricks or clay bricks. [0003] Among them, the working layer casted by the iron channel castable needs to be baked with blast furnace gas because of its high moisture content. The maximum baking temperature of the gas can reach 677°C. The carbon raw material in the castable is basically amorphous ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/04
CPCC04B26/04C04B2111/00482C04B2111/763C04B24/38C04B14/304C04B14/022
Inventor 周胜蒋宇雄
Owner 武汉市科达耐火有限责任公司
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