Unburned magnesia-carbon brick and preparation method thereof

A technology of magnesia-carbon bricks and complexed magnesium, which is applied in the field of advanced refractory materials, can solve the problems of mastering the details of the preparation process, high product costs, explosions, etc., and achieve the effects of improving workers' working conditions, saving economic costs, and overcoming high prices

Inactive Publication Date: 2017-08-29
孙光 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, in order to reduce smog and protect the environment, in the preparation method of magnesia carbon bricks, natural gas is used instead of fuel oil to provide heat energy during the firing process. Therefore, a large amount of natural gas is required to provide heat energy during the firing process. 600-800 yuan, the product cost is still high, and the burning of natural gas still produces a certain amount of greenhouse gases during the firing pro

Method used

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  • Unburned magnesia-carbon brick and preparation method thereof
  • Unburned magnesia-carbon brick and preparation method thereof
  • Unburned magnesia-carbon brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw materials were weighed according to the components specified in Table 1 below, and the preparation method was as follows.

[0031] (1) Raw material processing: Weigh the fused magnesia according to the weight and put it into the jaw crusher for crushing. After crushing into large particles, it will be crushed by double rollers, and then the aggregate with a particle size of 0.1-5mm will be screened out with a vibrating screen. , and then according to the proportion of the formula according to the weight of particle size 0.1-1mm, particle size 0.01-0.088mm, particle size 1-3mm, and particle size 3-5mm, the corresponding parts are screened out, and then reasonably distributed for the next step of crushing, it will take two times Put the pulverized fused magnesia into the Raymond mill for preparation, weigh high-temperature asphalt, metal aluminum powder, magnesium-aluminum alloy, boron carbide, rare earth oxides and ceramic binders to the above materials, and crush...

Embodiment 2

[0044] The method of Example 1 was repeated at the contents of each component specified in Table 1 below, and the test results are listed in Table 3.

Embodiment 3

[0046] The method of Example 1 was repeated at the contents of each component specified in Table 1 below, and the test results are listed in Table 3.

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Abstract

The invention belongs to the technical field of high-duty refractory for electric furnace and converter linings and ladle linings and in particular relates to an unburned magnesia-carbon brick and a preparation method thereof. The unburned magnesia-carbon brick is characterized by comprising the following components in parts by weight: 80-90 parts of fused magnesite (more than or equal to 97% of MgO, the granularity of 0.1-5mm and the moisture content of less than or equal to 4%), 12-16 parts of graphite (more than or equal to 98% of C, the granularity of less than or equal to 400 meshes, and the moisture content of less than or equal to 0.15%), 0.5-1.5 parts of metal aluminum powder (more than or equal to 98% of Al and the granularity of less than or equal to 400 meshes), 1-3 parts of an aluminum magnesium alloy (more than or equal to 98% of Al+Mg and the granularity of less than or equal to 400 meshes), 0.2-0.8 part of boron carbide (more than or equal to 99% of BC4 and the granularity of 200-325 meshes), 1-2.5 parts of high temperature pitch (softening temperature of more than or equal to 150 DEG C, more than or equal to 50% of residual carbon and the granularity of 100-200 meshes), 0.2-0.5 part of a rare earth oxide (the granularity of 300-350 meshes), 3-5 parts of ceramic bond, 3-4 parts of a complex magnesium-aluminum cementing agent and 1-3 parts of water. The unburned magnesia-carbon brick disclosed by the invention has the advantages of simple and safe preparation method, low cost, no need of high-temperature firing, high density, high strength, high corrosion resistance, molten metal resistance, high oxidation resistance, energy conservation and emission reduction and the like.

Description

technical field [0001] The invention belongs to the technical field of high-grade refractory materials for electric furnaces, converter linings and ladle linings, and in particular relates to a non-fired magnesia carbon brick and a preparation method thereof. Background technique [0002] Magnesia carbon brick is a new type of refractory material that emerged in the middle of the 20th century. It is a refractory material made of high-temperature sintered magnesia or fused magnesia and carbon materials and various carbonaceous binders. Due to its high refractoriness, Excellent thermal shock resistance and strong corrosion resistance are widely used in converter steelmaking and electric furnace steelmaking. Although the current magnesia carbon bricks meet certain requirements for use, they still have problems such as high price and short service life. Therefore, how to reduce costs and develop green and environmentally friendly refractory materials with high efficiency and lon...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/043C04B35/63C04B35/626
CPCC04B35/043C04B35/62655C04B35/63C04B35/6303C04B2235/3224C04B2235/3227C04B2235/3229C04B2235/3821C04B2235/40C04B2235/402C04B2235/425C04B2235/48C04B2235/5427C04B2235/608C04B2235/61
Inventor 孙光郭全营洪学勤
Owner 孙光
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