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Refractory wear-resistant pouring material and preparation method thereof

A fire-resistant and wear-resistant, castable technology, applied in the field of concrete pouring, can solve the problems of stability, poor fluidity, difficulty in mass casting, low demoulding strength, etc., to improve fluidity, improve mechanical strength, and reduce pretreatment. effect of the process

Active Publication Date: 2019-12-13
宜兴市张泽浇注耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability and fluidity of traditional silica sol castables are poor, and the release strength is low, so it is difficult to cast in large quantities

Method used

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  • Refractory wear-resistant pouring material and preparation method thereof

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preparation example Construction

[0044] The preparation method of the fire-resistant and wear-resistant castable, the specific steps are as follows:

[0045] Step 1. Preparation of composite glue

[0046] Take polyvinyl alcohol, water-soluble nano-scale silica sol, kaolin, vinyltriethoxysilane, boron fiber powder, and retarder in an appropriate mass ratio and mix uniformly to prepare a composite glue;

[0047] Step 2. Prepare mixed matrix slurry

[0048] Take finely ground natural river sand, alumina micropowder, microsilica fume, microsteel fiber and dispersant solution in appropriate mass ratio and particle size, and mix them uniformly to form a slurry, which has the fluidity that can be cast in the mold;

[0049] Step 3. Preparation of refractory and wear-resistant castable

[0050] Add the composite glue prepared in step 1 with an appropriate mass ratio to the graded ceramic particles with an appropriate mass ratio, and the composite glue forms a gel around the particles, followed by vacuum filtration a...

Embodiment example 1

[0052] Step 1. Preparation of composite glue

[0053]Get polyvinyl alcohol (35%), water-soluble nano-scale silica sol (44.8%), kaolin (12%), vinyltriethoxysilane (0.2%), boron fiber powder (8%), The retarder (organic acid retarder 0.001%) is mixed evenly to prepare the composite glue;

[0054] Step 2. Prepare mixed matrix slurry

[0055] Take the finely ground natural river sand (15%, 5 μm), alumina micropowder (10%, 5 μm), microsilica fume (15%, 1 μm), microsteel fiber (15%, 0.1mm) and Dispersant solution (45%, 15% sodium citrate solution), mixed evenly to form a slurry, has a fluidity that can be poured in a mold;

[0056] Step 3. Preparation of refractory and wear-resistant castables

[0057] Step 1 of adding an appropriate mass ratio to the graded ceramic particles (8-5mm: 5-3mm: 3-1mm: 1-0mm=35%: 25%: 35%: 5%) using a mass ratio (65%) Prepared composite glue (15%), the composite glue forms a gel around the particles, then vacuum filtration and drying, the gel combines...

Embodiment example 2

[0059] Step 1. Preparation of composite glue

[0060] Get polyvinyl alcohol (20%) of appropriate mass ratio, water-soluble nano-scale silica sol (55%), kaolin (20%), vinyltriethoxysilane (0.8%), boron fiber powder (4.2%), The retarder (organic acid retarder 0.001%) is mixed evenly to prepare the composite glue;

[0061] Step 2. Prepare mixed matrix slurry

[0062] Finely ground natural river sand (20%, 10 μm), alumina micropowder (12%, 8 μm), microsilica fume (20%, 1 μm), microsteel fiber (18%, 0.1mm) and Dispersant solution (40%, 15% sodium citrate solution), mixed evenly to form a slurry, has a fluidity that can be poured in a mold;

[0063] Step 3. Preparation of refractory and wear-resistant castables

[0064] Step 1 of adding an appropriate mass ratio to the graded ceramic particles (8-5mm: 5-3mm: 3-1mm: 1-0mm=40%: 30%: 20%: 10%) using a mass ratio (60%) Prepared composite glue (12%), the composite glue forms a gel around the particles, then vacuum filtration and dryi...

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Abstract

The invention discloses a refractory wear-resistant pouring material and a preparation method thereof. The refractory wear-resistant pouring material comprises the following raw material components in percentage by mass: 60-80% of graded ceramic particles, 5-25% of mixed matrix slurry, 4-15% of an adhesive and 6-10% of water, wherein the graded ceramic particles are divided into four granularity grades, and comprise ceramic particles of 8-5mm, ceramic particles of 5-3mm, ceramic particles of 3-1mm and ceramic particles of 1-0mm; and the mixed matrix slurry comprises milled natural river sand, alumina micro powder of 5-10 microns, silica fume, micro steel fibers and a dispersing agent solution. The fire resistance of silicon carbide ceramics is utilized, the cracking phenomenon caused by excessive CaO doping in the traditional cement refractory castable is avoided by adopting a complex adhesive, and steel fibers and boron fibers are introduced, so that the strength and wear resistance of the pouring material are improved on the basis of ensuring the fire resistance.

Description

technical field [0001] The invention relates to a refractory and wear-resistant pouring material and a preparation method thereof, belonging to the field of coagulation pouring. Background technique [0002] At present, unshaped refractory materials have been widely used, among which low cement and ultra-low cement refractory castables are the main types of unshaped refractory materials. Cement generally refers to calcium aluminate cement. Low cement and ultra-low cement are defined according to the CaO content. The essence of low cement is to avoid too much CaO in the material. Too much CaO will lead to a sharp decline in the high-temperature performance of the material, which will bring a series of adverse effects. influences. The high-temperature liquid phase of the material increases, the thermal strength decreases, and the slag resistance performance deteriorates, etc., and the cement will promote the hydration of the magnesia and increase the chance of product cracki...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3418C04B2235/349C04B2235/5216C04B2235/524
Inventor 张伟良
Owner 宜兴市张泽浇注耐火材料有限公司
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