Light-weight refractory material and preparation method thereof

A refractory material and lightweight technology, applied in the field of refractory materials, can solve problems such as affecting the thermal insulation effect, human and environmental pollution, and wall breaking.

Active Publication Date: 2018-08-14
SHANGHAI BAOMING REFRACTORIES CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, alumina hollow spheres are mainly added to achieve the above functions. Since the alumina hollow spheres have a hollow structure, when they are added to the ladle castable and vibrated during construction, the hollow spheres are easy to float to the upper part of the castable, causing pouring The distribution of the hollow ball particles on the upper and lower parts of the material is uneven, which leads to the difference in the thermal insulation performance of the ladle at different heights (the height of the ladle is 4-6m), w

Method used

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  • Light-weight refractory material and preparation method thereof
  • Light-weight refractory material and preparation method thereof

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Embodiment 1

[0016] Lightweight refractory materials include: 0.001-0.074mm starch 2%; 0.1-1.5mm sawdust 80%; 50-100 nanometer alumina powder 10%; 50-100 nanometer fused spinel powder 8% , as shown in Table 1 below.

[0017] Mix the ingredients according to the proportions of the above components, and stir them evenly in the mixer, then add water at a ratio of 100-120 kg of water per 1000 kg of the mixture, and stir again; transfer the stirred material after adding water into the The granulator is granulated to obtain spherical granules with a particle diameter of 0.5-5 mm; the obtained spherical granules are baked at a temperature of 90-120 degrees for 20-30 hours to remove moisture, and the finished product can be obtained.

[0018] The lightweight refractory material obtained by using the above-mentioned ingredients and process was tested for thermal conductivity at 1000°C and found that the thermal conductivity was 1.06 (w / m.k), which was 1.15 ( w / m.k)) is significantly lower than tha...

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Abstract

The invention provides a light-weight refractory material which is spherical particles and prepared from the materials in weight percentage: 2 to 10% of 0.001 to 0.0074mm starch, 70 to 80% of 0.1 to 1.5mm sawdust, 5 to 10% of 50 to 100 nanoscale aluminum oxide powder and 5 to 10% of 50 to 100 nanoscale electric smelted spinel powder.

Description

technical field [0001] The invention relates to a refractory material, in particular to a lightweight refractory material used in the production of castables for ladle permanent layers. Background technique [0002] The ladle permanent layer castables in the ladle must not only withstand high temperature, but also have a good heat preservation effect. Therefore, it is necessary to add lightweight refractory materials in the production process of the ladle permanent layer castables, thereby reducing the volume of the ladle permanent layer castables Density, so as to play a good role in heat preservation. [0003] In the prior art, alumina hollow spheres are mainly added to achieve the above functions. Since the alumina hollow spheres have a hollow structure, when they are added to the ladle castable and vibrated during construction, the hollow spheres are easy to float to the upper part of the castable, resulting in pouring The distribution of the hollow ball particles in th...

Claims

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Application Information

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IPC IPC(8): C04B35/101C04B38/06
CPCC04B35/101C04B38/0645C04B38/0675C04B2235/3222C04B2235/9607
Inventor 唐龙燕周文杰
Owner SHANGHAI BAOMING REFRACTORIES CO LTD
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