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Method for preparing wear-resistant refractory castable from aluminum-containing sludge

A technology of refractory castables and aluminum sludge, applied in the field of environmental engineering, can solve the problems of occupying large land resources, waste of aluminum resources, secondary pollution, etc., achieve low production costs, save resources and energy, and improve durability Effect

Active Publication Date: 2017-01-25
广东慧信环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of sludge is directly landfilled after drying treatment is currently the disposal method adopted by most enterprises, which not only occupies a large amount of land resources, but also causes waste of aluminum resources and may cause secondary pollution. Therefore, the pollution of aluminum factories The resource utilization of mud has important environmental protection significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Follow the steps below to prepare wear-resistant refractory castables

[0026] 1. Take 300g of water glass (the mass fraction of silica is 25%) in the reactor, start stirring, and add 250g of aluminum-containing sludge (the mass fraction of alumina is 12%), 10g of lime, and 30g of bauxite in order to increase the Rotate to 6000RPM, stir for 30min to form a suspension;

[0027] 2. Adjust the pH value to 8.8, place the suspension in a microwave reactor, radiate and homogenize it for 30 minutes at a power of 800W, take it out and heat it to dry to obtain raw meal;

[0028] 3. Put the raw material in a high-temperature furnace at 800°C for 4 hours, then cool it and discharge it for grinding to obtain a wear-resistant refractory castable.

[0029] Performance testing:

[0030] Al 2 o 3 Content 60%;

[0031] After drying at 110℃×24h, the bulk density is 2.41g / cm 3 , the compressive strength at room temperature is 55MPa, the flexural strength at room temperature is 7MPa,...

Embodiment 2

[0036] Follow the steps below to prepare wear-resistant refractory castables

[0037] 1. Take 500g of water glass (the mass fraction of silica is 20%) in the reactor, start stirring, and add 1000g of aluminum-containing sludge (the mass fraction of alumina is 5%), 25g of lime, 75g of fly ash and bentonite , increase the speed to 10000RPM, stir for 60min, and form a suspension;

[0038] 2. Adjust the pH value to 8, place the suspension in a microwave reactor, radiate and homogenize it at a power of 800W for 20 minutes, take it out and heat it to dry to obtain raw meal;

[0039] 3. Put the raw material in a high-temperature furnace at 1000°C for 6 hours, then cool it and discharge it for grinding to obtain a wear-resistant refractory castable.

[0040] Performance testing:

[0041] Al 2 o 3 Content 58%;

[0042] After drying at 110℃×24h, the bulk density is 2.55g / cm 3 , the compressive strength at room temperature is 71MPa, the flexural strength at room temperature is 10MP...

Embodiment 3

[0047] Follow the steps below to prepare wear-resistant refractory castables

[0048] 1. Take 300g of water glass (the mass fraction of silica is 22%) in the reactor, start stirring, add 240g of aluminum-containing sludge (the mass fraction of alumina is 15%), 3g of lime, and 6g of clay in sequence, and increase the speed to 8000RPM, stirring for 40min to form a suspension;

[0049] 2. Adjust the pH value to 10, place the suspension in a microwave reactor, radiate and homogenize it for 40 minutes at a power of 500W, take it out and heat it to dry to obtain raw meal;

[0050] 3. Put the raw material in a high-temperature furnace at 9000°C for 8 hours, then cool it and discharge it for grinding to obtain a wear-resistant refractory castable.

[0051] Performance testing:

[0052] Al 2 o 3 Content 61%;

[0053] After drying at 110℃×24h, the bulk density is 2.41g / cm 3 , the compressive strength at room temperature is 68MPa, the flexural strength at room temperature is 9MPa, ...

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Abstract

The invention belongs to the technical field of environmental engineering, and discloses a method for preparing a wear-resistant refractory castable from an aluminum-containing sludge. The aluminum-containing sludge, lime and a filler are sequentially added into water glass while being stirred, the mixture is stirred to form a suspension, the pH value is adjusted to 8-10, the suspension is radiated and homogenized under microwaves, taken out, heated and dried to obtain a raw meal, and the raw meal is calcined for 4-8 hours, cooled, discharged and grinded to obtain the wear-resistant refractory castable. The aluminum-containing sludge, which is a waste hard to process, is fully utilized, the waste is turned to treasure, the resource and the energy are saved, the environment pollution is eliminated, the production cost is low; the wear-resistant refractory castable has the advantages of excellent wear resistance and thermal conductivity, is high in compression resistance and breaking strength, improves the use durability, and is stable and reliable in quality.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and relates to a method for preparing wear-resistant and refractory castables by utilizing aluminum-containing sludge. Background technique [0002] A kiln is a device made of refractory materials for calcining materials or firing products. In many production industries such as building materials, metallurgy, chemical industry, environmental protection, etc., rotary equipment is widely used for mechanical, physical or chemical treatment of solid materials. This type of equipment is called rotary kiln. In social production, the role of rotary kiln is very important. In the design of the rotary kiln, the selection of refractory materials for each part of the kiln body is very important. The designer chooses different refractory materials according to the specific conditions such as thermal stress and mechanical force of each part of the kiln body. At present, in the field of we...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 马琦梁敏锐谭铭卓
Owner 广东慧信环保有限公司