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Low-cost magnesium gunning material and its preparation method

A gunning material and low-cost technology, applied in the field of refractory materials, can solve the problems of high material consumption and poor bonding of gunning materials, and achieve the effect of improving particle size composition, low rebound rate and reducing production cost.

Active Publication Date: 2013-06-26
山西高科耐火材料股份有限公司
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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 overcome the above shortcomings and provide a low-cost magnesium gunning material, which is suitable for hot repair of ladles, especially the repair of slag lines, and can not only solve the above problems of poor bonding of gunning materials and high material consumption , the more important thing is to optimize the batching and production process of the gunning material, reduce the production cost and improve the service life of the ladle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] After recovering, sorting, removing impurities, burning and removing carbon from waste magnesia-carbon refractory materials, after crushing, regenerated magnesia and 200-mesh regenerated magnesium powder with a particle size of 1-3mm and 0.088-1mm are obtained, and the weighing preparation is 1-3mm 35 parts of regenerated magnesia aggregate, 37 parts of 0.088-1mm regenerated magnesia aggregate, 8 parts of regenerated magnesium powder, 10 parts of sintered magnesium powder, 2.5 parts of sodium silicate, 1 part of slaked lime, poured into a mixer and fully mixed to obtain dry Material A; Al 2 o 3 Micropowder, sodium hexametaphosphate, and water were weighed according to the weight ratio of 40%, 20%, and 40%, respectively, and then poured into a high-efficiency ball mill for co-grinding until the average particle size was less than 1 μm, and a dispersed, suspended, uniform and stable slurry B was obtained. Measure 6.5 parts for later use; when using, first pour the dry ma...

Embodiment 2

[0024] After recovering, sorting, removing impurities, burning and removing carbon from waste magnesia-carbon refractory materials, after crushing, regenerated magnesia and 200-mesh regenerated magnesium powder with a particle size of 1-3mm and 0.088-1mm are obtained, and the weighing preparation is 1-3mm 35 parts of regenerated magnesia aggregate, 35 parts of 0.088-1mm regenerated magnesia aggregate, 5 parts of regenerated magnesium powder, 15 parts of sintered magnesium powder, 2.5 parts of sodium silicate, 1 part of slaked lime, poured into a mixer and fully mixed to obtain dry Material A; Al 2 o 3 Micropowder, sodium hexametaphosphate, and water are weighed according to the weight ratio of 45%, 20%, and 35%, respectively, and then poured into a high-efficiency ball mill for co-grinding until the average particle size is less than 1 μm, and a dispersed, suspended, uniform and stable slurry B is obtained; use First pour the dry material A into the mixer, add water and mix, ...

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Abstract

The invention discloses a low-cost magnesium gunning material and its preparation method. The low-cost magnesium gunning material is prepared from the following components of: by weight, 25-38 parts of recycled magnesia of 1-3mm, 32-42 parts of recycled magnesia of 0.088-1mm, 6-12 parts of a recycled magnesium powder of 200 meshes, 8-12 parts of a sintered magnesium powder, 1-5 parts of sodium silicate, 1-5 parts of calcium hydroxide and 3-10 parts of ultrafine slurry. When in use, the above magnesium gunning material is sprayed onto ladle damaged positions by the use of a spray gun so as to complete the repairing work. The magnesium gunning material has characteristics of low cost, good fluidity, high adhesive rate, rapid reaction, fast hardening, low spring rate, erosion resistance, anti-stripping capacity and the like, is applicable to hot repairing of ladle, especially to hot repairing of slag line portions, and can be used to effectively prolong service life of ladle.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a low-cost magnesium gunning material and a preparation method thereof. Background technique [0002] With the development and progress of high-temperature industry, high-temperature production conditions are becoming more and more harsh, which also prompts refractory manufacturers to continuously research and develop low-cost, long-life refractory materials. In the high-temperature production process, local damage caused by uneven erosion of the refractory lining will directly lead to a decrease in the service life of the refractory material and a serious waste of the refractory material. In order to improve the service life of refractory materials and maximize the utilization rate of refractory materials, various thermal gunning technologies and gunning materials have been developed. The gunning material can be directly sprayed on the damaged part of the refract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 高峰孙旭峰王虹
Owner 山西高科耐火材料股份有限公司
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