Explosion proofing castable for steel ladle working layer

Abstract

The invention belongs to the technical field of a refractory material technology for steel ladles in the ferrous metallurgy industry, and discloses an explosion proofing castable for a steel ladle working layer. The explosion proofing castable is characterized in that a composite explosion-proof agent and a composite water reducing agent are introduced in the castable, and the composition and the mixing ratio of the castable are adjusted, so that the inner structure of a material is improved, the air permeability and the strength at an intermediate temperature of the material are improved, the problem that the castable is peeled, separated and then cracked during being baked can be effectively avoided, the resulting loss of a user can be avoided, and simultaneously, the baking time is reduced, the energy is saved, and the pollution is reduced.

Description

technical field

[0001] The invention belongs to the technological field of refractory materials for ladles in the iron and steel metallurgy industry, and in particular relates to an explosion-proof castable for ladle working layers. Background technique

[0002] With the large-scale, high-efficiency, continuous casting of steelmaking technology equipment and the continuous development of labor saving, energy saving and consumption reduction, higher requirements are put forward for refractory materials for ladles. How to use materials and construction technology freely , constantly seeking to improve the package life, and greatly reduce the unit consumption.

[0003] At present, the promotion and use of low-cement, ultra-low-cement, and cement-free series castables for the ladle working layer, on the one hand, overcomes the shortage of traditional aluminum-magnesium-carbon bricks in increasing the carbon content of molten steel, and ensures the production of low-carbon steel....

Examples

Embodiment 1

[0024] Embodiment one: the explosion-proof castable for the ladle working layer is configured with the following raw material components: high alumina bauxite (Al 2 o 3 : 88.1%, Fe 2 o 3 : 1.1%, CaO: 0.7%, bulk density: 3.22g / cm 3 ): 30%, fused white corundum (Al 2 o 3 : 99.5%, bulk density: 3.53g / cm 3 ): 58%, 97 fused magnesia (MgO: 97.2%, SiO 2 : 1.8%, CaO: 0.5%, bulk density: 3.19g / cm 3 ): 4.5%, 95 silica powder (SiO 2 : 95.6%, Al 2 o 3 : 0.6%): 1.1%, α-alumina fine powder (Al 2 o 3 : 99.7%, Fe 2 o 3 : 0.1%): 6%, composite explosion-proof agent (metal aluminum powder, 0.03%; low melting point explosion-proof fiber, 0.1%, aluminum lactate powder, 0.05%): 0.18%, organic-inorganic composite water reducer (ADW1, 0.1%, ADS1, 0.1%, sodium tripolyphosphate, 0.1%): 0.3%, respectively fully and evenly mix the raw materials according to the proportion. The actual amount of water added on site is 4.5-5.0%.

[0025] The explosion-proof castable for the working layer of ...

Embodiment 2

[0026] Embodiment two: the explosion-proof castable for the ladle working layer is configured with the following raw material components: the explosion-proof castable for the ladle working layer is configured with the following raw material components (WL%): 88 high alumina bauxite (Al 2 o 3 : 88.1%, Fe 2 o 3 : 1.1%, CaO: 0.7%, bulk density: 3.22g / cm 3 ): 66%, fused white corundum (Al 2 o 3 : 99.5%, bulk density: 3.53g / cm 3 ): 18.5%, 96 fused magnesia (MgO: 96.4%, SiO 2 : 2.1%, CaO: 0.6%, bulk density: 3.14g / cm 3 ): 9.5%, 92 silica powder (SiO 2 : 93.3%, Al 2 o 3 : 0.9%): 2%, α-alumina fine powder (Al 2 o 3 : 99.7%, Fe 2 o 3 : 0.1%): 4%, composite explosion-proof agent (metal aluminum powder, 0.03%; low melting point explosion-proof fiber, 0.1%, aluminum lactate powder, 0.05%): 0.18%, organic-inorganic composite water reducer (ADW1, 0.1%, ADS1, 0.1%, sodium tripolyphosphate, 0.1%): 0.3%, respectively fully and evenly mix the raw materials according to the proport...

technical field

[0001] The invention belongs to the technological field of refractory materials for ladles in the iron and steel metallurgy industry, and in particular relates to an explosion-proof castable for ladle working layers. Background technique

[0002] With the large-scale, high-efficiency, continuous casting of steelmaking technology equipment and the continuous development of labor saving, energy saving and consumption reduction, higher requirements are put forward for refractory materials for ladles. How to use materials and construction technology freely , constantly seeking to improve the package life, and greatly reduce the unit consumption.

[0003] At present, the promotion and use of low-cement, ultra-low-cement, and cement-free series castables for the ladle working layer, on the one hand, overcomes the shortage of traditional aluminum-magnesium-carbon bricks in increasing the carbon content of molten steel, and ensures the production of low-carbon steel....

Examples

Embodiment 1

[0024] Embodiment one: the explosion-proof castable for the ladle working layer is configured with the following raw material components: high alumina bauxite (Al 2 o 3 : 88.1%, Fe 2 o 3 : 1.1%, CaO: 0.7%, bulk density: 3.22g / cm 3 ): 30%, fused white corundum (Al 2 o 3 : 99.5%, bulk density: 3.53g / cm 3 ): 58%, 97 fused magnesia (MgO: 97.2%, SiO 2 : 1.8%, CaO: 0.5%, bulk density: 3.19g / cm 3 ): 4.5%, 95 silica powder (SiO 2 : 95.6%, Al 2 o 3 : 0.6%): 1.1%, α-alumina fine powder (Al 2 o 3 : 99.7%, Fe 2 o 3 : 0.1%): 6%, composite explosion-proof agent (metal aluminum powder, 0.03%; low melting point explosion-proof fiber, 0.1%, aluminum lactate powder, 0.05%): 0.18%, organic-inorganic composite water reducer (ADW1, 0.1%, ADS1, 0.1%, sodium tripolyphosphate, 0.1%): 0.3%, respectively fully and evenly mix the raw materials according to the proportion. The actual amount of water added on site is 4.5-5.0%.

[0025] The explosion-proof castable for the working layer of ...

Embodiment 2

[0026] Embodiment two: the explosion-proof castable for the ladle working layer is configured with the following raw material components: the explosion-proof castable for the ladle working layer is configured with the following raw material components (WL%): 88 high alumina bauxite (Al 2 o 3 : 88.1%, Fe 2 o 3 : 1.1%, CaO: 0.7%, bulk density: 3.22g / cm 3 ): 66%, fused white corundum (Al 2 o 3 : 99.5%, bulk density: 3.53g / cm 3 ): 18.5%, 96 fused magnesia (MgO: 96.4%, SiO 2 : 2.1%, CaO: 0.6%, bulk density: 3.14g / cm 3 ): 9.5%, 92 silica powder (SiO 2 : 93.3%, Al 2 o 3 : 0.9%): 2%, α-alumina fine powder (Al 2 o 3 : 99.7%, Fe 2 o 3 : 0.1%): 4%, composite explosion-proof agent (metal aluminum powder, 0.03%; low melting point explosion-proof fiber, 0.1%, aluminum lactate powder, 0.05%): 0.18%, organic-inorganic composite water reducer (ADW1, 0.1%, ADS1, 0.1%, sodium tripolyphosphate, 0.1%): 0.3%, respectively fully and evenly mix the raw materials according to the proport...

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