Novel converter magnesia carbon brick and preparation method thereof

A converter magnesia-carbon brick and magnesia-carbon brick technology, which is applied in the field of refractory materials, can solve the problems of thinning profit of converter magnesia-carbon bricks, too late to eliminate, waste of recycled materials, etc., so as to improve utilization, reduce production pressure, and reduce energy consumption. Effect

Active Publication Date: 2013-11-20
WUGANG REFRACTORY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, on the one hand, due to the increasingly tight resources of various mines at home and abroad, the profits of converter magnesia-carbon brick products have been decreasing day by day, and some companies have even sold at a loss; During the dismantling and replacement process, although it was found that there are still a large number of areas of the product that have not been eroded and damaged, it should be able to continue to be used as recycled materials after processin

Method used

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  • Novel converter magnesia carbon brick and preparation method thereof
  • Novel converter magnesia carbon brick and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0037] The preparation method of the novel converter magnesia carbon brick of the present invention includes the following steps:

[0038] 1) Picking: Picking magnesia carbon brick recycled materials, removing the metamorphic layer and surface impurities of recycled materials;

[0039] 2) Crushing: After the sorted recycled materials are crushed to ≤12mm, they are subjected to magnetic separation to remove the iron contained in the recycled materials; then sieving is performed to remove powders ≤1mm.

[0040] 3) Heat treatment: heat and dry the reclaimed material treated in step 2) at a heating rate of 8~15℃ / min. After heating up to 350℃, keep it for 6~10h, select MgO≥75%, SiO 2 ≤3.6%, CaO≤2.2%, Fe 2 O 3 ≤1.9%, Al 2 O 3 ≤4.5% of recycled materials are reserved;

[0041] 4) Part of the recycled materials processed in step 3) are further crushed and then sieved together with the rest of the recycled materials. Two types of recycled materials with particle sizes of 1mm

Example Embodiment

[0053] Example 1:

[0054] In this embodiment, the new converter magnesia carbon brick is formed from 1 / 4 part of material a and 1 part of material b, wherein the weight parts of each component in each part of material a are:

[0055] Fused magnesia, in the fused magnesia, fused magnesia with a MgO content ≥97.0% and a particle size of 3mm

[0056] Graphite: 10 parts by weight;

[0057] Phenolic resin: 2 parts by weight.

[0058] In each part b, the weight parts of each component are:

[0059] Recycled materials that have been sorted, crushed, heat-treated, and further crushed. Among them, 35 parts by weight are those with a particle size of 1mm

[0060] Fused magnesia, the MgO content of the ...

Example Embodiment

[0064] Example 2:

[0065] In this embodiment, the new converter magnesia carbon brick is formed from 1 part of material a and 1 part of material b, wherein the weight parts of each component in each part of material a are:

[0066] Fused magnesia. In the fused magnesia, fused magnesia with a MgO content ≥ 97.0% and a particle size of 3 mm

[0067] Graphite: 9 parts by weight;

[0068] Phenolic resin: 6 parts by weight.

[0069] In each part b, the weight parts of each component are:

[0070] Recycled materials that have been sorted, crushed, heat-treated, and further crushed, of which 20 parts by weight are those with a particle size of 1mm

[0071] Fused magnesia, the MgO content of t...

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Abstract

The invention discloses a novel converter magnesia carbon brick and a preparation method thereof. The method comprises the following steps: 1) sorting and roguing; 2) crushing, and removing false granules; 3) carrying out heat treatment, and selecting a reclaimed material, which contains at least 75% of MgO, at most 3.6% of SiO2, at most 2.2% of CaO, at most 1.9% of Fe2O3 and at most 4.5% of Al2O3, for later use; 4) further crushing part of the reclaimed material subjected to the step 3), and screening the part of the reclaimed material and the rest of reclaimed material; and 5) carrying out pressure molding by a gradient molding technique. The method disclosed by the invention can obviously enhance the utilization ratio of renewable resources, and sufficiently implements reutilization of resources and reduces waste of nonrenewable resources, thereby reducing the energy consumption and the lowering the production pressure of the enterprise. The novel converter magnesia carbon brick prepared by the method has favorable properties, and can well satisfy the production requirements.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a novel converter magnesia-carbon brick and a preparation method thereof. Background technique [0002] Steelmaking converter is a vertical cylindrical furnace that mainly uses liquid pig iron as raw material for steelmaking without external heat source. Its main features are: relying on the physical heat of liquid pig iron in the converter and the heat generated by the chemical reaction of various components in the pig iron (such as carbon, manganese, silicon, phosphorus, etc.) Ingredients and temperature required. According to the properties of lining refractories, it can be divided into two types: acidic converter and basic converter; according to the position where the gas is blown into the furnace, the converter is divided into bottom blowing, top blowing, side blowing and top-bottom composite blowing converter. Magnesia-carbon bricks have high ref...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 雷中兴周辉周勇龚仕顺刘良兵徐志华秦常杰洪学勤田先明
Owner WUGANG REFRACTORY CO LTD
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