Preparation method for high-temperature lightweight tough mullite aggregate

A technology for mullite and high temperature, applied in applications, household utensils, ceramic products, etc., to avoid brittle fracture, reduce the introduction of impurity elements, and improve thermal insulation performance

Active Publication Date: 2019-07-23
RUITAI MATERIALS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention relates to a lightweight tough mullite aggregate for high temperature, which mainly solves the problem that the bulk density of the current lightweight aggregate is less than or equal to 1.0g / cm 3 The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In parts by weight, 45 parts of mullite powder, 15 parts of microsilica powder with a mass fraction of 94.0%, 40 parts of soft clay, and 0.2 parts of water reducer are mixed with water, and the stirring speed is 500r / min. Mix well to form a homogeneous slurry.

[0032] Add 10 parts of TR-WLFP and 0.3 parts of foam stabilizer to the homogeneous slurry. The stirring steps are as follows: Step 1: The stirring speed is 700r / min, and the stirring time is 8 minutes;

[0033] The second step: the stirring speed is 400r / min, and the stirring time is 3min;

[0034] After the foaming slurry is prepared, the stirring speed is controlled at 200 r / min, 10 parts of chopped refractory fibers and 15 parts by mass of silica sol are added, and stirring is continued for 3 minutes. The prepared fiber composite foam slurry was poured into a mold, placed in a drying oven at 70°C for 8 hours, and then the temperature of the oven was increased to 110°C. After being dried for 12 hours, it was ...

Embodiment 2

[0036] In parts by weight, 45 parts of mullite powder, 15 parts of microsilica powder with a mass fraction of 94.0%, 40 parts of soft clay, and 0.2 parts of water reducer are mixed with water, and the stirring speed is 500r / min. Mix well to form a homogeneous slurry.

[0037] Add 20 parts of TR-WLFP and 0.2 parts of foam stabilizer to the homogeneous slurry. The stirring steps are as follows: Step 1: The stirring speed is 700r / min, and the stirring time is 8 minutes;

[0038] The second step: the stirring speed is 400r / min, and the stirring time is 3min;

[0039] After the foaming slurry is prepared, the stirring speed is controlled at 200 rad / min, 10 parts of chopped refractory fibers and 15 parts by mass of aluminum sol are added, and stirring is continued for 3 minutes. The prepared fiber composite foam slurry was poured into a mold, placed in a drying oven at 70°C for 8 hours, and then the temperature of the oven was increased to 110°C. After being dried for 12 hours, it ...

Embodiment 3

[0041] In parts by weight, 45 parts of mullite powder, 15 parts of microsilica powder with a mass fraction of 94.0%, 40 parts of soft clay, and 0.2 parts of water reducer are mixed with water, and the stirring speed is 500r / min. Mix well to form a homogeneous slurry.

[0042] Add 25 parts of TR-WLFP and 0.2 parts of foam stabilizer to the homogeneous slurry. The stirring steps are as follows: the first step: the stirring speed is 700r / min, and the stirring time is 8min;

[0043] The second step: the stirring speed is 400r / min, and the stirring time is 3min;

[0044] After the foaming slurry is prepared, control the stirring speed at 200 rad / min, add 10 parts of chopped refractory fiber, 10 parts by mass of aluminum sol and 5 parts by mass of silica sol, and continue stirring for 3 minutes. The prepared fiber composite foam slurry was poured into a mold, placed in a drying oven at 70°C for 8 hours, and then the temperature of the oven was increased to 110°C. After being dried ...

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Abstract

The invention relates to a preparation method for a high-temperature lightweight tough mullite aggregate. According to the technical scheme, the preparation method comprises the following steps: mixing 40-65 parts of mullite powder, 5-25 parts of 94.5% silica powder, 20-55 parts of soft clay and 0.3-0.5 part of water reducer in parts by weight with water while stirring at a stirring rate of 500 rad/min, thereby fully mixing main materials and forming into a uniform slurry; adding 10-40 parts of foaming agent and 0.1-0.6 part of foam stabilizer into the uniform slurry. According to the invention, a manner of one-step foaming is combined with a unique stirring process, for fully and uniformly distributing the foaming agent into the slurry and lastly forming a foam slurry; the production process is simple and practicable; volume density of aggregate body is 0.5kg/m3-0.6kg/m3; volume density of sintered aggregate is 0.3kg/m3-0.4kg/m3.

Description

technical field [0001] The invention relates to a lightweight tough aggregate used in the field of refractory materials, in particular to an ultra-light mullite aggregate for high temperature and a preparation method thereof. [0002] technical background [0003] High temperature industry has always been a high energy consumption and high pollution industry. The massive consumption of fuel energy has caused a huge negative impact on the natural environment and social life, and the thermal insulation and energy saving of thermal kilns has increasingly attracted the attention of the industry. [0004] At present, the preparation methods of lightweight aggregate mainly include loss-on-burn method, chemical method and foaming agent method. Among them, patent CN108793911A discloses "a method for preparing magnesium lightweight aggregate by foaming method". In this patent, oleate is used as foaming agent, calcium stearate is used as foam stabilizer, and magnesium oxide powder is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B35/185C04B35/622C04B38/10
CPCC04B18/027C04B35/185C04B35/622C04B38/10C04B2235/3418C04B2235/349C04B2235/6022C04B2235/606C04B2235/656C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 魏瀚尹超男徐如林赵洪亮徐琳琳王俊涛胡建辉闫昕周严敦
Owner RUITAI MATERIALS TECHNOLOGY CO LTD
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