A preparation method of lightweight tough mullite aggregate for high temperature

A mullite, high-temperature technology, used in applications, ceramic products, household appliances, etc., to improve thermal insulation performance, reduce the introduction of impurity elements, and reduce production costs

Active Publication Date: 2021-10-08
RUITAI MATERIALS TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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

[0030] 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.

[0031] 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;

[0032] The second step: the stirring speed is 400r / min, and the stirring time is 3min;

[0033] 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

[0035] 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.

[0036] 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;

[0037] The second step: the stirring speed is 400r / min, and the stirring time is 3min;

[0038] 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

[0040] 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.

[0041] 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;

[0042] The second step: the stirring speed is 400r / min, and the stirring time is 3min;

[0043] 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

A method for preparing light-weight and tough mullite aggregate for high temperature. Its technical scheme is: by weight, 40-65 parts of mullite powder, 5-25 parts of silicon micropowder whose mass fraction is 94.0%, 20-55 parts of soft clay, 0.3-0.5 parts of water reducing agent Add water and mix, the stirring speed is 500rad / min, and the main materials are fully mixed into a uniform slurry. Add 10-40 parts of foaming agent and 0.1-0.6 parts of foam stabilizer to the homogeneous mud. The invention adopts a one-step foaming method and cooperates with a unique stirring process to fully and uniformly distribute the foaming agent in the slurry, and finally form a foamed slurry, and the production process is simple and easy to implement. The bulk density of the aggregate body is 0.5g / cm 3 ‑0.6 g / cm 3 ;The bulk density of the aggregate after burning is 0.3g / cm 3 ‑0.4 g / cm 3 .

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. Background technique [0002] 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. [0003] 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 used as ...

Claims

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Application Information

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Patent Type & Authority Patents(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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