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Low-temperature wear-resistant castable used for inner liner of forced heat exchanger of light calcined MgO electrical kiln

A heat exchanger and castable technology, applied in the field of refractory materials, to achieve the effects of good formability, strong scouring ability and excellent thermal shock stability

Inactive Publication Date: 2018-05-18
鞍山澳海耐火材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of the kiln wall lining material in the forced heat exchanger area of ​​the existing light-fired MgO electric kiln, and propose a magnesia castable for the inner lining of the forced heat exchanger of the light-fired MgO electric kiln, which can have good Low temperature wear resistance

Method used

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  • Low-temperature wear-resistant castable used for inner liner of forced heat exchanger of light calcined MgO electrical kiln
  • Low-temperature wear-resistant castable used for inner liner of forced heat exchanger of light calcined MgO electrical kiln
  • Low-temperature wear-resistant castable used for inner liner of forced heat exchanger of light calcined MgO electrical kiln

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A low-temperature wear-resistant castable for light-burned MgO electric heating shaft kiln forced heat exchanger, this embodiment includes the following composition and its content:

[0015]

[0016] The magnesia particles are sintered magnesia, and the MgO content in the magnesia particles is more than or equal to 92wt%. 18wt%, and those with a particle size of 0.1-1mm accounted for 22wt%.

[0017] The magnesia fine powder is sintered magnesia, the content of MgO in the magnesia fine powder is more than 95wt%, and the particle size of the magnesia fine powder is less than or equal to 88 μm, accounting for 20-25wt%.

[0018] The binder magnesium cement is magnesium oxysulfide cement, accounting for 10 wt%.

[0019] The white mud described is Guangxi white mud with a particle size of ≤88 μm.

[0020] The additive is any metal Al powder.

[0021] Use effect: The material has good molding effect, high strength at room temperature after drying, excellent thermal shock...

Embodiment 2

[0023] A low-temperature wear-resistant castable for light-burned MgO electric heating shaft kiln forced heat exchanger, this embodiment includes the following composition and its content:

[0024]

[0025] The magnesia particles are sintered magnesia, and the MgO content in the magnesia particles is more than or equal to 92wt%. 12wt%, and those with a particle size of 0.1-1mm accounted for 30wt%.

[0026] The magnesia fine powder is sintered magnesia, the content of MgO in the magnesia fine powder is more than 95wt%, and the particle size of the magnesia fine powder is less than or equal to 88 μm, accounting for 20-25wt%.

[0027] The binder magnesium cement is magnesium oxysulfide cement, accounting for 15 wt%.

[0028] The white mud described is Guangxi white mud with a particle size of ≤88 μm.

[0029] The additive is metal sodium hexametaphosphate.

[0030] Use effect: The material has good molding effect, high strength at room temperature after drying, excellent th...

Embodiment 3

[0032] A low-temperature wear-resistant castable for light-burned MgO electric heating shaft kiln forced heat exchanger, this embodiment includes the following composition and its content:

[0033]

[0034] The magnesia particles are sintered magnesia, and the MgO content in the magnesia particles is ≥92wt%. 15wt%, and those with a particle size of 0.1-1mm accounted for 25wt%.

[0035] The magnesia fine powder is sintered magnesia, the content of MgO in the magnesia fine powder is more than 95wt%, and the particle size of the magnesia fine powder is less than or equal to 88 μm, accounting for 20-25wt%.

[0036] The binder magnesium cement is magnesium oxysulfide cement, accounting for 5 wt%.

[0037] The white mud described is Guangxi white mud with a particle size of ≤88 μm.

[0038] The additive is any one of metal Al powder, sodium hexametaphosphate, sodium lignosulfonate, citric acid and paper fiber.

[0039] Use effect: The material has good molding effect, high str...

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Abstract

The invention discloses a low-temperature wear-resistant castable used for an inner liner of a forced heat exchanger of a light calcined MgO electrical kiln. The castable comprises magnesia particles,fine magnesia powder, magnesium cement taken as a binder, alpha-Al2O3 micropowder, white clay, sodium hexametaphosphate, paper fiber, an additive, calcium lignin sulphonate and citric acid. The obtained castable is good in moulding performance and low temperature wear resistance, great in scouring resistance to magnesian materials, and excellent in thermal shock stability at an operating temperature. The castable is used for a kiln wall of a forced heat exchange area of a pre-heating zone and a cooling zone of a light calcined MgO electrical heating shaft kiln, and has an obvious use effect.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a low-temperature wear-resistant castable for the inner lining of a forced heat exchanger of a light-burned MgO electric heating shaft kiln. Background technique [0002] The forced heat exchange area of ​​light-burned MgO electric heating shaft kiln materials is mainly the pre-tropical material heat exchange area and the cooling belt material heat exchange area, and 2-20 pairs of pre-tropical material heat exchange devices and cooling belt material heat exchange devices are respectively installed . The working temperature of the lining material of the heat exchange device is 300-500°C. When the material is descending, it will severely scour the area of ​​the forced exchanging belt, which will bring great gravity impact and mechanical wear to the lining material of the part. The preheating belt is in contact with the cold material added from the feeding area and the hot air f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3217C04B2235/349C04B2235/5427C04B2235/5436
Inventor 李春光罗旭东李婷杨孟孟
Owner 鞍山澳海耐火材料有限公司