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Refractory lining material and preparation method thereof

A technology of refractory lining and colloidal sol, which is applied in the field of refractory materials and its preparation in the high temperature zone of cement rotary kiln, can solve the problems of poor high temperature volume stability, environmental hazards, poor alkali resistance, etc. Inexpensive, strong alkali resistance effect

Active Publication Date: 2016-03-23
云南天朗能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of existing refractory materials such as harmfulness to the environment, high price, poor high-temperature volume stability, and poor alkali resistance, the present invention provides a refractory lining material and a preparation method thereof, which can improve the kiln skin hanging performance and thermal shock resistance of refractory materials. stable performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. SnCl 4 ·5H 2 O and water are mixed at a mass ratio of 12:3 to form SnO 2 aqueous solution, and then under stirring conditions, according to SnCl 4 ·5H 2 The mass ratio of O to concentrated ammonia water (mass concentration is 25-28%) is 12︰4 Add concentrated ammonia water dropwise to obtain dark brown SnO 2 Sol;

[0033] B. Prepare the core-shell structure carrier through the following steps:

[0034] (1) Grinding magnesium to nano-scale microspheres of 1-200nm;

[0035] (2) Disperse the nano-microspheres in step (1) at 8 g / mL in the mixture of CTAB and ethanol to form a suspension, and stir the suspension under ultrasonic conditions to make the nano-microspheres evenly dispersed in the solution ; Wherein, the mixed solution of CTAB and ethanol is that CTAB is dissolved in absolute ethanol, so that the concentration of CTAB in the mixed solution is 0.1mol / L;

[0036] (3) Add the suspension obtained in step (2) into TBOT slowly and dropwise together with ammoni...

Embodiment 2

[0050] A. SnCl 4 ·5H 2 O and water are mixed at a mass ratio of 10:2.5 to make SnO 2 aqueous solution, and then under stirring conditions, according to SnCl 4 ·5H 2 The mass ratio of O to concentrated ammonia water (mass concentration is 25-28%) is 10︰2.5 Add concentrated ammonia water dropwise to obtain dark brown SnO 2 Sol;

[0051] B. Prepare the core-shell structure carrier through the following steps:

[0052] (1) Grinding magnesium to nano-scale microspheres of 200-300nm;

[0053] (2) Disperse the nanospheres in step (1) in the mixture of CTAB and ethanol at 1g / mL to form a suspension, and stir the suspension under ultrasonic conditions to disperse the nanospheres evenly in the solution ; Wherein, the mixed solution of CTAB and ethanol is that CTAB is dissolved in absolute ethanol, so that the concentration of CTAB in the mixed solution is 0.08mol / L;

[0054] (3) Add the suspension obtained in step (2) into TBOT slowly and dropwise together with ammonia water unde...

Embodiment 3

[0068] A. SnCl 4 ·5H 2 O and water are mixed at a mass ratio of 15:4 to form SnO 2 aqueous solution, and then under stirring conditions, according to SnCl 4 ·5H 2 The mass ratio of O to concentrated ammonia water (mass concentration is 25-28%) is 15︰6 Add concentrated ammonia water dropwise to obtain dark brown SnO 2 Sol;

[0069] B. Prepare the core-shell structure carrier through the following steps:

[0070] (1) Grinding magnesium to nano-scale microspheres of 400-500nm;

[0071] (2) Disperse the nano-microspheres in step (1) in the mixed solution of CTAB and ethanol at 10g / mL to form a suspension, and stir the suspension under ultrasonic conditions to make the nano-microspheres evenly dispersed in the solution ; Wherein, the mixed solution of CTAB and ethanol is that CTAB is dissolved in absolute ethanol, so that the concentration of CTAB in the mixed solution is 0.25mol / L;

[0072] (3) Add the suspension obtained in step (2) into TBOT slowly and dropwise together w...

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Abstract

The invention relates to a refractory lining material and a preparation method thereof. The refractory lining material is composed of following components, by mass: 10-20 parts of SnO2 sol, 30-50 parts of a core-shell-structured carrier, 50-70 parts of magnesite and 20-40 parts of mullite. The preparation method includes the following steps: uniformly mixing the SnO2 sol and the core-shell-structured carrier, finely grinding the magnesite and the mullite and adding the magnesite and the mullite to the SnO2 sol and the core-shell-structured carrier with mixing, and performing regular mixing, pressing moulding, drying and calcination to obtain the refractory lining material. The refractory lining material has a compact stacked structure, is good in not only kiln coating forming property but also thermal shock stability, has excellent anti-permeation erosion property, can block diffusion of air and flue gas pollutants into the refractory lining material and is effectively prevented from being oxidized at a high temperature. The refractory lining material is long in service life, is low in production cost, is good in high-temperature size stability, is strong in alkaline resistance and is free of any environment pollution after combustion.

Description

technical field [0001] The invention relates to a refractory inner lining material and a preparation method thereof, in particular to a refractory material for a high temperature zone of a cement rotary kiln and a preparation method thereof. Background technique [0002] my country is the world's largest cement producer. At present, magnesia-chrome bricks, magnesia-aluminum spinel bricks, magnesia-calcium bricks or magnesia-zirconium bricks are commonly used in the high-temperature zone of cement rotary kiln, and magnesia-chrome bricks are mainly used in the firing zone. Some of these bricks are harmful to the environment after burning, and some are expensive, have poor high-temperature volume stability, and poor alkali resistance. They not only consume scarce super-grade bauxite, but also consume scarce zircon. [0003] Therefore, it is necessary to develop a refractory material with good kiln skin hanging performance, good thermal shock stability and no harm to the enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/32C04B2235/3206C04B2235/3293C04B2235/3463
Inventor 周庆华刘成苏兆平杨汝林龚贵君冯小勇常骏庾郁凡
Owner 云南天朗能源科技有限公司
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