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A refractory self-flowing castable

A castable and refractory technology, applied in the field of refractory materials, can solve the problems of reducing the service life of castables, poor fluidity, poor temperature resistance, etc.

Active Publication Date: 2021-08-27
HUNAN RAMON SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is difficult to find a balance between the raw material composition and ratio of self-flowing castables and the performance of castables, which makes the formulation design of castables more difficult. Usually, when adding corresponding additives to improve a certain aspect of performance, it will often Destruction of other aspects of performance, such as adding fluidity aids to improve self-flowing properties, often affects the strength and thermal stability of the castable, etc.
In the existing self-flowing refractory castables, various additives are often added to reconcile the performance of the castables, but there are still disadvantages such as poor temperature resistance, poor fluidity, and slow construction and solidification; in order to speed up the construction, it is often required to shake or add a lot of water Water can be used to achieve this, which will cause large porosity, low strength and poor thermal stability of the castable, which will reduce the service life of the castable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1.1 Sample preparation

[0044] raw material:

[0045] 25 parts of sintered corundum, 18 parts of alumina hollow spheres (particle size 0.2mm), 18 parts of α-alumina powder (particle size 500 mesh), 8 parts of silicon micropowder, 8 parts of fused magnesia (particle size 400 mesh), 6 parts of binder (the mass ratio of silica sol:trimethoxysilane is 10:0.1).

[0046] Preparation:

[0047] Sintered corundum, aluminum oxide hollow spheres, α-alumina powder, silicon micropowder, and fused magnesia are weighed and mixed, then poured into a mixer, and then a binder is added and stirred evenly to obtain a refractory self-flowing castable.

[0048] 1.2 Performance test

[0049] The self-flow value of the obtained refractory castable was tested at 20°C (tested according to the self-flow method specified in the national standard GB / T 3003-2006), the test results are shown in Table 1, and Table 1 is the castable obtained from the practical examples and comparative examples of t...

Embodiment 2

[0052] 15 parts of sintered corundum, 15 parts of alumina hollow spheres (particle size 0.1mm), 15 parts of α-alumina powder (particle size 325 mesh), 5 parts of silicon micropowder, 5 parts of fused magnesia (particle size 200 mesh), 5 parts of binder (the mass ratio of silica sol:triethoxysilane is 10:0.08).

[0053] Prepare according to the formula of Example 1 to obtain a refractory self-flowing castable.

[0054] According to the performance test method of Example 1, the performance test of the obtained refractory self-flowing castable was carried out, and the test results are shown in Table 1.

Embodiment 3

[0056] 30 parts of sintered corundum, 20 parts of alumina hollow spheres (particle size 0.3 mm), 20 parts of α-alumina powder (particle size 800 mesh), 10 parts of silicon micropowder, 10 parts of fused magnesia (particle size 600 mesh), 10 parts of binder (the mass ratio of silica sol:γ-glycidyl etheroxypropyl trimethoxysilane is 10:0.12).

[0057] Prepare according to the formula of Example 1 to obtain a refractory self-flowing castable.

[0058] According to the performance test method of Example 1, the performance test of the obtained refractory self-flowing castable was carried out, and the test results are shown in Table 1.

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Abstract

The invention provides a refractory self-flowing castable, which is prepared from the following raw materials in parts by weight: 5-40 parts of corundum, 5-20 parts of alumina hollow spheres, 5-20 parts of α-alumina powder, 1-15 parts of silicon micropowder, 1-15 parts of magnesia, 5-10 parts of binder, the binder is silica sol and silane coupling agent. The present invention obviously improves the fluidity, refractoriness, strength and other properties of the casting material through the combination of the above specific components and dosage, thereby prolonging the service life of the casting material.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a refractory self-flowing castable. Background technique [0002] Refractory castable is a mixture composed of refractory aggregates, binders and admixtures, etc., mixed with water or liquid binders, and is a mud material for pouring construction. The production process of refractory castables is simple, labor-saving and energy-saving, and can be prepared on site according to needs. Therefore, refractory castables are medium-unshaped refractory materials that are used in large quantities in furnace construction projects and have a wide range of applications. Due to the advantages of strong operability, low capital investment and convenient construction, it is widely used in metallurgy and other industries. [0003] According to different construction methods, refractory castables can be divided into two categories: vibration construction type castables and self-flow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/101
CPCC04B35/101C04B2235/3206C04B2235/3418C04B2235/528C04B2235/5436C04B2235/96
Inventor 田陆
Owner HUNAN RAMON SCI & TECH
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