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Antisticking coating mixture for steel-smelting and preparation method threreof

A smear and anti-adhesive technology, which is applied in the fields of unshaped refractories, anti-adhesive smears for steelmaking and their preparation, can solve the problems of increased refractory materials, damage to refractory smears, and short service time, so as to reduce porosity High efficiency, not easy to hang slag, cost saving effect

Inactive Publication Date: 2008-10-15
PANZHIHUA SHUNTENG GRP METALLURGY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, the refractory smear is severely damaged, resulting in a short service life, and the service life of the smear is generally less than 10 hours, which increases the amount of refractory material consumed per ton of steel produced, and increases to a certain extent cost

Method used

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  • Antisticking coating mixture for steel-smelting and preparation method threreof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The mass percentages of the main chemical components of the anti-stick coating material for steelmaking are: MgO 74.80%, Al 2 o 3 3.11%, CaO 2.13%, C 10.98%, SiO 2 3.45%, Fe 2 o 3 1.26%.

[0030] The specific ratio (percentage by weight) of each raw material is: 75% of waste magnesia carbon sand with a particle size of 0-3mm, 10% of waste magnesia carbon powder, 6% of fused magnesia powder, 3.5% of silicon micropowder, α-Al 2 o 3 2.0%, sodium hexametaphosphate 0.6%, calcium lignosulfonate 0.4%, soft clay 2.5%.

[0031] Weigh according to the above weight percentage, first put the fine powder into the mixer for pre-mixing for 10 minutes, then add 0-3mm granular material and stir to mix. The total kneading time is 20 minutes after discharge, sampling inspection, weighing and packaging. spare.

Embodiment 2

[0033] The mass percentages of the main chemical components of the anti-stick coating material for steelmaking are: MgO 79.16%, Al 2 o 3 3.77%, CaO 1.63%, C 9.08%, SiO 2 3.85%, Fe 2 o 3 1.69%.

[0034] The specific ratio (percentage by weight) of each raw material is: 70% of waste magnesia carbon sand with a particle size of 0-3mm, 8% of waste magnesia carbon powder, 12% of fused magnesia powder, 3.0% of silicon micropowder, α-Al 2 o 3 3.0%, sodium hexametaphosphate 0.6%, calcium lignosulfonate 0.4%, soft clay 3.0%

[0035] Weigh according to the above weight percentage, first put the fine powder into the mixer for pre-mixing for 10 minutes, then add 0-3mm granular material and stir to mix. The total kneading time is 20 minutes after discharge, sampling inspection, weighing and packaging. spare.

Embodiment 3

[0037] The smear provided by the present invention is compared with the performance, application and economic benefit of the previously used smear:

[0038] 1. Performance comparison

[0039] Take an appropriate amount of anti-stick coating material for steelmaking produced in Example 1, add an appropriate amount of water and stir evenly, mold it in a triple mold of 160×40×40mm and a crucible mold with an inner hole size of φ25mm×40mm, place it at room temperature for 24 hours, and demould , bake at 110°C for 24 hours, and test the drying performance indicators. Put 30g of slag material into the crucible, perform heat treatment at 1500℃φ×3h in a high-temperature furnace, cool naturally, and detect the depth of slag corrosion. The slag used in the slag resistance test is the final steelmaking slag of Panzhihua Iron and Steel Corporation. The comparative example is a conventional product. The detection indicators are as follows:

[0040]

[0041] 2. Application

[0042] ...

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Abstract

The invention relates to an anti-sticking daubing material applied in steelmaking as well as the preparation method thereof, and is characterized in that the daubing material is composed of the following components by weight percentages as follows: 65 to 80 percent of 0 to 3 mm waste magnesia-carbon brick powder, 10 to 30 percent of waste magnesia-carbon brick powder, 5 to 30 percent of fused magnesia powder, 1 to 4 percent of fine silica powder, 1 to 4 percent of fine Alpha-Al2O3 powder, 0.1 to 1 percent of sodium hexameta phosphate, 0.1 to 0.8 percent of calcium lignosulfonat and 1 to 5 percent of soft clay. The daubing material can prevent the penetration of molten slag by utilizing the lubricating property of graphite in the waste magnesia-carbon bricks, and the slag is not easy to be hung on the surface, thereby not only effectively utilizing the waste magnesia-carbon bricks, but also prolonging the service life and reducing the cost.

Description

technical field [0001] The invention relates to an anti-adhesive smear for steelmaking and a preparation method thereof. It is mainly used for lining surface coating of RH refining furnace, LF refining furnace and other high-temperature thermal equipment for steelmaking. It belongs to the category of unshaped refractories. Background technique [0002] Refractory smear is one of the important varieties of unshaped refractory materials. It was used earlier in my country and has developed rapidly in the past ten years. On kilns and thermal equipment, this type of material can be used to coat new linings, or to coat used linings, or to repair local damage to brick linings to protect the original linings. It is widely used because of its simple construction and good economic benefits. [0003] At present, such products mainly use magnesia corundum and silicon as raw materials, and there are various types. However, in actual use, the refractory smear is severely damaged, resu...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 徐宏武
Owner PANZHIHUA SHUNTENG GRP METALLURGY MATERIAL
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