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Pouring material for steel ladle

A castable and ladle technology, which is used in casting molten material containers, manufacturing tools, metal processing equipment, etc., can solve the problems of reduced service life of ladle lining, failure to meet use requirements, and carbonization of molten steel, and achieves long service life, Good slag erosion resistance and slag penetration resistance, long life effect

Inactive Publication Date: 2010-11-24
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] When smelting pure steel, carbon-containing materials such as aluminum-magnesium-carbon bricks contain high carbon, which leads to carbonization of molten steel, thereby polluting molten steel, so it cannot meet the requirements of use
When the existing aluminum spinel or aluminum-magnesium castables are used to smelt aluminum-killed steel-based ladles, there is a serious sticky slag phenomenon, resulting in less molten steel loading and polluting the next batch of molten steel; Increased residence time and high alkalinity of some refining slags significantly reduce the service life of aluminum spinel or aluminum-magnesium castable ladle linings

Method used

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Effect test

Embodiment 1

[0033] According to the content of the components described in Table 1, each raw material is weighed in turn, and the castable for ladle of the present invention can be prepared through forced kneading.

[0034] Various components involved in the present invention are common raw materials, which can be purchased conveniently in the chemical raw material market.

[0035] Wherein, the Al-Mg spinel is purchased from Kaifeng Tonai Co., Ltd. or Qingdao Anmai Aluminum Co., Ltd., with a magnesium oxide content greater than 8%, and a combined amount of magnesium oxide and aluminum oxide greater than 97%.

[0036] The corundum mentioned above is brown corundum, purchased from Kaifeng Tenai Co., Ltd. or Qingdao Anmai Aluminum Co., Ltd., with an alumina content greater than 94%.

[0037] The pure calcium aluminate cement is purchased from Kainuosi (China) Aluminate Technology Co., Ltd.

[0038] The hydrated alumina powder is purchased from Qingdao Anmai Aluminum Co., Ltd.

Embodiment 2

[0040] According to the content of the components described in Table 1, each raw material was weighed in sequence, and put into a mixer for forced kneading to obtain the castable for ladle of the present invention.

Embodiment 3

[0042] According to the content of the components described in Table 1, each raw material is weighed in turn, and the castable for ladle of the present invention can be prepared through forced kneading.

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PUM

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Abstract

The invention discloses a pouring material for a steel ladle. The pouring material consists of the following components in part by weight: 40 to 75 parts of alumina-magnesia spinel (between 25 and 0.074 mm), 10 to 20 parts of alumina fine powder, 3 to 7 parts of magnesia powder of which the magnesia content is over 95 percent, 1 to 5 parts of pure calcium aluminate cement, 0.5 to 1.5 parts of silicon dioxide fine powder, 0.05 to 0.5 part of water reducing agent, 1 to 35 parts of corundum (between 25 and 0.074 mm) and 0.5 to 5 parts of hydrated alumina powder. The pouring material for the steel ladle has the advantages of extremely high molten steel corrosion resistance, slag corrosion resistance, slag penetration resistance, no pollution to molten steel when taken as a refractory material for the liner of a molten steel accommodating container for smelting pure steel, slag bonding resistance and very long service life.

Description

technical field [0001] The invention relates to an unshaped refractory material, in particular to a pouring material for a ladle. Background technique [0002] The existing lining refractories for ladles mainly include alumina-magnesia-carbon bricks and castables, such as aluminum spinel or aluminum-magnesium castables. [0003] The Chinese invention patent CN1337376A published on February 27, 2002 discloses a casting material for ladles, the weight ratio is: 75-95% of fused white corundum, 5-15% of fused magnesia, 1-15% of chrome green 5%, SiO 2 1%, pure calcium aluminate cement 1%. [0004] The Chinese invention patent CN1640590A published on July 20, 2005 discloses a ladle aluminum-magnesium-densified fused corundum castable, which is composed of three parts A, B and C, wherein the weight % of each component is expressed in terms of casting The total weight of the material is 100% by weight: Part A is a uniform mixture of the following components: dense fused corundum...

Claims

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Application Information

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IPC IPC(8): C04B35/66B22D41/02
Inventor 金从进李泽亚顾德仁
Owner BAOSHAN IRON & STEEL CO LTD
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