High-strength magnesium refractory mortar for refining steel ladle

A high-strength refractory mud technology, which is applied in the field of refined ladle refractory mud, can solve the problems of brick joints being easily corroded, and achieve the effects of enhanced erosion resistance and permeability, high strength, and reduced water addition

Active Publication Date: 2022-03-18
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0007] The object of the present invention is to provide a high-strength magnesia refractory mud for refining ladles. The refractory mud has good bonding strength and still has high strength, high temperature resistance and erosion resistance under the ladle refining process and high temperature conditions, so as to solve the problem of ladle application. The problem that the brick joints are most likely to be corroded

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  • High-strength magnesium refractory mortar for refining steel ladle
  • High-strength magnesium refractory mortar for refining steel ladle

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific examples.

[0024] A high-strength magnesia refractory mud for refining ladles, the raw materials of the refractory mud include: 79-87% of magnesia, 5-10% of aluminum-magnesium spinel fine powder, active α-Al 2 o 3 Micropowder 3~8%, SiO 2 Micropowder 0.5-3%, magnesium aluminate gel powder 1-5%; plus sodium hexametaphosphate + 0.2-0.6%, carboxymethyl cellulose + 1-5%. Since the various refractory bricks used for masonry and refining ladles mainly involve magnesia, aluminum, and magnesia-aluminum refractory bricks, and the service temperature exceeds 1600°C, the chemical composition of the refractory mud in the present invention is mainly MgO. The brick has good bonding performance, high strength, good resistance to high-temperature molten steel erosion, and less low-melt in the composition, and has better high-temperature resistance, and the chemical composition of refractory mud is more...

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Abstract

The invention relates to high-strength magnesium refractory mortar for refining a steel ladle. The refractory mortar is prepared from the following raw materials in percentage by weight: 79 to 87 percent of magnesia, 5 to 10 percent of aluminum-magnesium spinel fine powder, 3 to 8 percent of active alpha-Al2O3 micro powder, 0.5 to 3 percent of SiO2 micro powder and 1 to 5 percent of magnesium aluminate gel powder, and 0.2-0.6% of sodium hexametaphosphate and 1-5% of carboxymethyl cellulose are additionally added. The steel ladle bonding agent has good bonding strength, still has high strength, high temperature resistance and scouring resistance under the conditions of a steel ladle refining process and high temperature, and solves the problem that brick joints are most easily eroded in steel ladle application.

Description

technical field [0001] The invention relates to refining ladle refractory mud, in particular to a high-strength magnesia refractory mud suitable for building refining ladle refractory bricks. Background technique [0002] High-quality steel usually undergoes molten steel refining and must be contained in refining ladles. Most of the working lining of the ladle is made of refractory bricks. The commonly used refractory bricks include magnesia carbon bricks, aluminum magnesia carbon bricks, magnesia aluminum carbon bricks, corundum prefabricated bricks, and aluminum magnesium prefabricated bricks. And these refractory bricks must be bonded with refractory mud to form a complete lining. If the performance of the fireclay is not good, the refractory brick joints will become the weakest link in the refining process. Expansion and falling of refractory bricks are important reasons for the penetration of molten steel into the working lining or the leakage of ladles. [0003] Chin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B22D41/02
CPCC04B35/66B22D41/02C04B2235/3206C04B2235/3222C04B2235/3217C04B2235/3418C04B2235/447C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/96C04B2235/9615C04B2235/9607Y02P10/20
Inventor 甘菲芳舒友亮
Owner BAOSHAN IRON & STEEL CO LTD
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