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Low-cost magnesium-zirconium-carbon converter tapping hole brick and preparation method thereof

A magnesium-zirconium-carbon, low-cost technology, applied in the field of refractory materials, can solve the problems of poor thermal shock resistance, limited tap life, easy to produce cracks, etc., to improve thermal shock resistance, reduce overall costs, and promote crystal growth. Effect

Pending Publication Date: 2021-04-06
MAANSHAN LIER KAIYUAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, domestic magnesia resources have been continuously decreasing, resulting in large fluctuations in the price of domestic high-grade magnesia raw materials, especially the high price of high-purity large-crystal magnesia. The following problems: 1. The carbon in the material is easy to oxidize and lose carbon at high temperature, which leads to the loss of the corrosion resistance of the material and limits the life of the taphole. The service life of the converter has become the main factor restricting the production efficiency of the converter; 2. The raw material selected for the magnesia-carbon taphole brick is large crystal magnesia, and th

Method used

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  • Low-cost magnesium-zirconium-carbon converter tapping hole brick and preparation method thereof
  • Low-cost magnesium-zirconium-carbon converter tapping hole brick and preparation method thereof
  • Low-cost magnesium-zirconium-carbon converter tapping hole brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0052]Example 1

[0053]A low-cost magnesium zirconal carbonaceous converter in this embodiment, the composition and weight percentage:

[0054]20 parts of high quality regenerated magnesium carbon, 20 parts of 98 major crystalline magnesium granules, 5 parts of electric melt magnesium zircon granules, 4 parts of scale graphite, 31 copies of co-grinding, and 3 parts of the phenolic resin. Among them, the particle size of co-grinding is less than 180 mesh, from 18.8 parts of 98 major crystalline magnesium sand powder, 5 parts of electro-melted magnesia sand powder, 5 parts of metal aluminum powder, 0.2 parts of carbide, 1.5 parts of high temperature asphalt powder And 0.5 parts of Al-Mg alloy powder is mixed uniform, as shown in Table 1.

[0055]The high quality regenerated magnesium carbon is recovered using a rear magnesium carbon brick, and the present embodiment is the recycled utilization of the converter lining brick or high-grade slag.

[0056]The high quality regenerated magnesium carbon...

Example Embodiment

[0074]Example 2

[0075]The present embodiment is a low-cost magnesium carbonaceous converter out of steel brick, and its composition ingredients and weight percentages are prepared in Example 1 according to the formulation shown in Table 1.

Example Embodiment

[0076]Example 3

[0077]The present embodiment is a low-cost magnesium carbonaceous converter out of steel brick, and its composition ingredients and weight percentages are prepared in Example 1 according to the formulation shown in Table 1.

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Abstract

The invention discloses a low-cost magnesium-zirconium-carbon converter tapping hole brick and a preparation method thereof, and belongs to the technical field of refractory materials. The converter tapping hole brick comprises granular aggregate, co-grinding powder, a binding agent and crystalline flake graphite, the granular aggregate comprises a high-quality recycled magnesia carbon material, 98 macrocrystalline magnesia particles and fused magnesia-zircon sand particles, wherein the high-quality recycled magnesia carbon material is a recycled magnesia-carbon brick, the particle size of the co-grinding powder is 0-0.074 mm, and the co-grinding powder comprises 98 macrocrystalline magnesia powder, electric smelting magnesium-zirconium sand powder, metal aluminum powder, boron carbide, high-temperature asphalt powder and Al-Mg alloy powder; and the binding agent is phenolic resin. The preparation method comprises the following steps: preparing the co-grinding powder, preparing the granular aggregate, performing mixing, molding and drying, preparing the tapping hole adhesive, and performing reassembling, inspecting and packaging to obtain the finished product. On the premise that the service life of the tapping hole is not shortened, the overall cost of the tapping hole brick is greatly reduced, and meanwhile, the thermal shock resistance and the erosion resistance of the tapping hole brick are improved.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a low-cost magnesium-zirconium carbonaceous converter taphole brick and a preparation method. Background technique [0002] Taphole brick is an important part of the refractory material of the converter tapping slag retaining system, and its overall life affects the production efficiency of the converter. The taphole is the channel for the molten steel to flow from the converter to the ladle. It is the key refractory material of the converter. Its service life and safety directly affect the safety and production efficiency of the converter. During the use of the taphole, it not only has to withstand the mechanical erosion of high-temperature molten steel, but also has to withstand the penetration and chemical erosion of molten steel and slag. At the same time, due to the intermittent production of the converter, it is necessary for the taphole brick to ha...

Claims

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Application Information

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IPC IPC(8): C04B35/043C04B33/132C21C5/46F27D1/06
CPCC04B35/043C04B33/1324C21C5/4653F27D1/063C04B2235/402C04B2235/3821C04B2235/401C04B2235/425C04B2235/9607C04B2235/9676Y02P10/20Y02P40/60
Inventor 张远红余西平徐昆波周亮纪恺汪玉娇刘辉
Owner MAANSHAN LIER KAIYUAN NEW MATERIAL
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