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Method for recycling waste refractory materials

A technology for waste refractory materials and granular materials, applied in the field of environmental protection, can solve the problems of low recycling rate, unreasonable treatment methods, waste of resources, etc., and achieve the effects of recycling and added value improvement, considerable economic benefits, and waste reduction.

Inactive Publication Date: 2018-05-08
长兴科创科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of unreasonable domestic waste refractory treatment methods, resource waste and low recycling rate, the present invention provides a method for recycling waste refractory materials with high recycling rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Divide waste refractories into four categories: magnesia-carbon, aluminum-magnesium-carbon, aluminum-carbon and aluminum-silicon-carbide-carbon;

[0031] (2) Select the waste refractory materials that have been sorted in step (1), based on the total mass of recycled materials, and make ingredients according to the following composition ratio: 85% Al 2 o 3 , 0.5% SiO 2 , 1.5% MgO, 0.5% ZrO 2 , and the balance is impurities to obtain recycled materials;

[0032] (3) Crushing the recycled materials to obtain recycled pellets, and magnetically separating the recycled pellets to remove iron;

[0033] (4) Classify the regenerated pellets after magnetic separation and iron removal. Based on the total mass of the regenerated pellets, the particle size and mass percentage of the regenerated pellets obtained after the middle particle classification are: 5~3mm Particles account for 35%, 3~1mm particles account for 55% and 0.5~0.1mm particles account for 10%;

[0034] (5) ...

Embodiment 2

[0038] (1) Divide waste refractories into four categories: magnesia-carbon, aluminum-magnesium-carbon, aluminum-carbon and aluminum-silicon-carbide-carbon;

[0039] (2) Select the waste refractory materials that have been sorted in step (1), based on the total mass of recycled materials, and make ingredients according to the following composition ratio: 90% Al 2 o 3 , 3.5% SiO 2 , 4.5% MgO, 1.5% ZrO 2 , and the balance is impurities to obtain recycled materials;

[0040] (3) Crushing the regenerated material after magnetic separation and iron removal to obtain regenerated pellets, and performing magnetic separation and iron removal on the regenerated pellets;

[0041](4) Classify the recycled pellets. Based on the total mass of the recycled pellets, the particle size and mass percentage of the recycled pellets obtained after classification of the medium pellets are: 5~3mm particles account for 30%, 3 ~1mm particles accounted for 45% and 0.5~0.1mm particles accounted for 25...

Embodiment 3

[0046] (1) Divide waste refractories into four categories: magnesia-carbon, aluminum-magnesium-carbon, aluminum-carbon and aluminum-silicon-carbide-carbon;

[0047] (2) Select the waste refractory materials that have been sorted in step (1), based on the total mass of recycled materials, and make ingredients according to the following composition ratio: 8,7% Al 2 o 3 , 2% SiO 2 , 3% MgO, 1% ZrO 2 , and the balance is impurities to obtain recycled materials;

[0048] (3) Crushing the regenerated material after magnetic separation and iron removal to obtain regenerated pellets, and performing magnetic separation and iron removal on the regenerated pellets;

[0049] (4) Classify the recycled pellets. Based on the total mass of the recycled pellets, the particle size and mass percentage of the recycled pellets obtained after grading the medium particles are: 5~3mm particles account for 25%, 3 ~1mm particles accounted for 52% and 0.5~0.1mm particles accounted for 23%;

[0050]...

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Abstract

The invention relates to the technical field of environmental protection, in particular to a method for recycling waste refractory materials. The method comprises the following technological processes: classifying and selecting the waste refractory materials; on a basis of the total weight of reclaimed materials, preparing a material with the following ingredients at a ratio: 85%-90% of Al2O3, 0.5%-3.5% of SiO2, 1.5%-4.5% of MgO, 0.5%-1.5% of ZrO2 and the balance of impurities, crushing the material, removing iron by magnetic separation, performing size grading, heating and drying, feeding inthe material for mixing, firing the material at high temperature for forming, and cooling, so as to obtain a regenerated high-alumina brick. According to the method, the regenerated high-alumina brickis generated by adopting the waste refractory materials, so that the process is simple, the waste of the waste refractory materials can be reduced, the recycling of the waste refractory materials andthe increase of the added value are facilitated; the regenerated high-alumina brick produced by taking the waste refractory materials as raw materials is good in thermal shock resistance and pressureendurance and has considerable economic benefits.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for recycling waste refractory materials with a high recycling rate. Background technique [0002] In recent years, with the rapid growth of my country's steel production, the consumption of domestic refractory materials has also increased greatly. Among them, the proportion of waste refractory materials has reached 45% of the total consumption of refractory materials, and the current processing method of waste refractory materials is still Most of them are buried as industrial waste, and only a small amount is roughly utilized. It is a pity that waste refractory materials are treated as garbage, which not only increases the processing cost, but also causes some pollution to the environment and wastes precious resources. At present, the recycling rate of waste refractory materials in China is not high, and its utilization method is too simple and simplis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/106C04B35/622C04B35/66
CPCC04B35/106C04B35/62204C04B2235/3206C04B2235/3418
Inventor 赵志云
Owner 长兴科创科技咨询有限公司
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