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Low-cost ramming material for RH and preparation method thereof

A low-cost, ramming material technology, used in the field of smelting refractory materials, can solve the problems of waste disposal environmental pollution, narrow application scope, environmental pollution, etc., and achieve the effects of low cost, cost reduction, and satisfaction of use requirements.

Inactive Publication Date: 2020-02-28
PANZHIHUA GANGCHENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the magnesia-chrome bricks in this method are chromium-containing products, and the conversion of low-priced Cr ions to high-priced Cr ions will cause great pollution to the environment, and waste disposal also has environmental pollution problems, resulting in a narrow range of applications.

Method used

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  • Low-cost ramming material for RH and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0022] After the used waste refractory materials are recycled, sorted and sorted, the residual iron, residual steel and metamorphic layer on the surface are removed; the used waste refractory materials (Al 2 o 3 content is 91.69wt%, MgO content is 7.66wt%) and is ground into three different particle sizes of 3

[0023] According to the mass percentage content, 3<particle size≤5mm used waste refractory material 20%, 1<particle size≤3mm used waste refractory material 25%, particle size≤1mm used waste refractory material 30%, particle size≤0.088 mm magnesia 22%, high alumina cement 2.8%, sodium tripolyphosphate admixture 0.2%;

[0024] Add it into a blender, stir and mix until uniform, and get ramming material for RH.

Embodiment 2

[0026] After the used waste refractory materials are recycled, sorted and sorted, the residual iron, residual steel and metamorphic layer on the surface are removed; the used waste refractory materials (Al 2 o 3 The content is 89.32wt%, the MgO content is 8.02wt%), please supplement the component content data) and be crushed into three different particle sizes: 3

[0027] According to the mass percentage content, 25% of used waste refractory materials for 3<particle size≤5mm, 22% of used waste refractory materials for 1<particle size≤3mm, 25% of used waste refractory materials for particle size≤1mm, particle size≤0.088 mm magnesia 24%, high alumina cement 3.8%, sodium tripolyphosphate admixture 0.2%;

[0028] Add it into a blender, stir and mix until uniform, and get ramming material for RH.

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Abstract

The invention discloses a low-cost ramming material for RH and a preparation method thereof and belongs to the technical field of smelting refractory materials. The low-cost ramming material for RH comprises, by mass, 20-25% of a used waste refractory material with particle sizes of greater than 3mm and less than or equal to 5mm, 20-25% of a used waste refractory material with particle sizes of greater than 1mm and less than or equal to 3mm, 25-30% of a used waste refractory material with particle sizes of less than or equal to 1mm, 20-25% of magnesia, 2-5% of a binding agent and 0.1-0.5% of additives. After the ramming material is used, refractory material resources are reasonably applied, and environmental pollution caused by solid waste emission is reduced. The ramming material for RH has the characteristics of low cost, stable high-temperature performances and no new pollution.

Description

technical field [0001] The invention belongs to the technical field of smelting refractory materials, and in particular relates to a low-cost RH ramming material and a preparation method thereof. Background technique [0002] Refractories are an important part of the production of iron and steel enterprises, and the treatment of used refractories has always been one of the problems faced by the industry. In order to reduce the discharge of waste, the reuse of used refractory materials has become a research topic. Refractory materials such as ladle breathable bricks (seat bricks) and RH castables are all high-quality corundum materials. Through appropriate treatment processes, they can replace new materials and be used in environments with harsh conditions to maximize their value. [0003] The RH vacuum circulating molten steel refining process is a necessary process for smelting high-grade steel grades. The construction of the vacuum chamber insertion tube requires a refrac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3206C04B2235/3217C04B2235/447
Inventor 卓胜严翀毛朋张远春
Owner PANZHIHUA GANGCHENG GROUP
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