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A kind of converter flue discharge chute castable and preparation method thereof

A castable and chute technology, which is applied in the field of refractory materials for the converter flue blanking chute in the iron and steel industry, to achieve the effects of wide sources, cost reduction and prolongation of service life

Active Publication Date: 2017-10-03
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a casting material for converter flue feeding chute with low cost and excellent performance. The casting material has low cost, high strength, high temperature resistance, friction resistance, slag resistance and high temperature gas erosion ability. , long life and other advantages, compared with the existing steel, the service life of the blanking chute is greatly improved, the cost is greatly reduced, and there is no water leakage problem

Method used

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  • A kind of converter flue discharge chute castable and preparation method thereof
  • A kind of converter flue discharge chute castable and preparation method thereof
  • A kind of converter flue discharge chute castable and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A castable for preparing converter flue blanking chute, its raw material formula is shown in Table 1:

[0035] Weigh various materials according to the proportions stated in Table 1, put them into a mixer and mix and stir for 3 to 5 minutes, then add water (the amount of water added is 4% to 6% of the total weight of the materials) and mix and stir for 2 to 3 minutes, inject the fixed Vibration molding in a good mold. After pouring and curing for 2 days, it is demoulded, baked at 110°C for 48 hours, and then kept in a high-temperature furnace at 1650°C for 24 hours, and can be put into use after natural cooling. Its main physical and chemical indicators are as follows:

[0036]

Embodiment 2

[0038] A castable for preparing converter flue blanking chute, its raw material formula is shown in Table 1:

[0039] The method for preparing the blanking chute with this castable is the same as in Example 1, and its main physical and chemical indicators are as follows:

[0040]

Embodiment 3

[0042] A castable for preparing converter flue blanking chute, its raw material formula is shown in Table 1:

[0043] The method for preparing the blanking chute with this castable is the same as in Example 1, and its main physical and chemical indicators are as follows:

[0044]

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PUM

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Abstract

The invention belongs to the field of refractory materials for a converter flue blanking chute in the iron and steel industry, and in particular relates to a casting material for a converter flue blanking chute and a preparation method thereof. The casting material of the present invention contains 10-25% of mid-range magnesia with a particle size of 3-5mm, 20-40% of mid-grade magnesia with a particle size of 1-3mm, 10-25% of high-bauxite with a particle size of 0-3mm, and 5-20% of magnesium-aluminum spinel with a particle size of 0-1mm, 5-15% of industrial alumina with a particle size of ≤50μm, 3-8% of SiC with a particle size of 80-120 mesh, and 2-2% of pure calcium aluminate cement with a particle size of ≤0.088mm 8%, water glass 2-6%, water reducer 0.5-1.5%. The castable can meet the conditions of use on both sides of the furnace mouth section of the converter flue, and the converter flue discharge chute made of it has the advantages of low cost, high strength, high temperature resistance, friction resistance, strong resistance to slag and high temperature gas erosion, and long service life Etc. At the same time, the overall solid pouring does not require water cooling, which completely solves the problem of water leakage that plagues the discharge chute and saves a lot of water resources.

Description

technical field [0001] The invention belongs to the field of refractory materials for a converter flue blanking chute in the iron and steel industry, and specifically relates to a castable for a converter flue blanking chute and a preparation method thereof. Background technique [0002] The converter flue feeding chute is also called the feeding chute, the feeding water jacket or the feeding chute, which is installed on both sides of the mouth section of the converter flue. The main function is to add raw materials for removing phosphorus, sulfur and other impurities during the converter smelting process. The heating surface of the discharge chute bears the erosion and wear of solid materials, the corrosion of acid gas and the oxidation of high-temperature water vapor. The splashed high-temperature slag is easy to blow and splash to the heating surface to form high-temperature erosion slag, and the water vapor and SO in the high-temperature flue gas 2 , SO 3 1. Serious c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 王长宝
Owner SHANDONG IRON & STEEL CO LTD