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Method for sintering and curing industrial waste residue

A technology for industrial waste residue and solidification treatment, applied in building components, buildings, building structures, etc., can solve problems such as difficulty and complex production process, and achieve the effect of reducing sintering temperature and optimizing process parameters.

Active Publication Date: 2010-07-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these processes for producing wall materials have made great progress and are widely used in the construction industry, the production process of using manganese slag to solidify bricks is complicated and difficult, and it requires considerable technology to fully develop and master its production technology and product quality. Strength and practical experience in production, there is no precedent for using manganese slag to make bricks to solidify industrial waste in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A certain amount of manganese slag, shale and fly ash are dried to constant weight at 95°C, and the mass ratio of manganese slag: shale: fly ash: cadmium slag: iron slag: calcium magnesium slag = 20:55:5 : 3:11:6 mixed together and ground to the gradation requirements (the maximum particle size of the raw material particles does not exceed 2.5mm, more than 95% of those below 2mm, more than 90% of those below 1mm, and more than 70% of those below 0.5mm) , the material under the sieve is the raw material, then add a certain amount of sodium humate stabilizer (accounting for 3% of the mass of the raw material) and clear water (accounting for 25% of the mass of the raw material) and mix well, after indoor aging for 3 days, the vacuum extrusion mechanism Form a sample block with a size of 240mm×115mm×53mm, then dry it at 120°C for 24h (or place it outdoors to dry naturally for 1 week), and finally put it in a muffle furnace and raise the temperature to 950°C at a rate of 60°C...

Embodiment 2

[0033] Dry a certain amount of manganese slag, shale, fly ash, cadmium slag, iron slag and calcium-magnesium slag to constant weight at 110°C, and then grind them separately to meet the gradation requirements (the maximum particle size of raw material particles shall not exceed 2.5mm , account for more than 95% below 2mm, account for more than 90% below 1mm, and account for more than 70% below 0.5mm), take the material under the sieve according to the mass ratio of manganese slag: shale: fly ash: cadmium slag: iron slag: Calcium magnesium slag = 30:46:4:2:13:5 mixed into raw materials, then add a certain amount of sodium humate stabilizer (accounting for 4% of raw material mass) and clear water (accounting for 30% of raw material mass) and stir well After indoor aging for 2 days, a sample block with a size of 240mm×115mm×53mm was made by a vacuum extruder, then dried at 130°C for 16 hours (or placed outdoors for 6 days), and finally placed in a muffle furnace for 50 Raise the ...

Embodiment 3

[0035]Dry a certain amount of manganese slag, shale, fly ash, cadmium slag, iron slag and calcium-magnesium slag to constant weight at 125°C, and then grind them separately to meet the gradation requirements (the maximum particle size of raw material particles shall not exceed 2.5mm , account for more than 95% below 2mm, account for more than 90% below 1mm, and account for more than 70% below 0.5mm), take the material under the sieve according to the mass ratio of manganese slag: shale: fly ash: cadmium slag: iron slag: Calcium magnesium slag=40:37:3:1:15:4 mixed into raw materials, then add a certain amount of sodium humate stabilizer (accounting for 5% of raw material mass) and clear water (accounting for 35% of raw material mass) and stir well After indoor aging for 1 day, a sample block with a size of 240mm×115mm×53mm was made by a vacuum extruder, then dried at 140°C for 8 hours (or placed outdoors for 8 days), and finally placed in a muffle furnace for 40 The temperature...

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Abstract

The invention discloses a method for sintering and curing industrial waste residue, in which manganese residue, shale, fly ash, cadmium residue, iron residue and calcium and magnesium residue which are dried to constant weight are mixed and ground according to a certain ratio or mixed after being ground respectively, and then are screened in accordance with a certain grading requirement to obtain preparation raw materials of waste residue mixed and cured sintered bricks, and then a certain amount of sodium humate stabilizer and water are added into the raw materials, the mixture is stirred evenly, aged for some time and then made into a sample block via a vacuum extruder, and finally the sample block is treated by the heat treatment processes of drying, roasting, cooling and the like to obtain a waste residue mixed and cured sintered product. The invention takes electrolytic manganese dioxide residue as main curing material, and takes the shale as an auxiliary curing material, various industrial solid wastes such as coal ash, cadmium residue, iron residue and the like are cured via the processes of burdening, pretreatment, moulding, drying, roasting and cooling, the sintering temperature is reduced via optimizing process parameters, and a waste residue fixed and cured sintered brick which can cure heavy metal waste residue is produced.

Description

technical field [0001] The invention belongs to the technical field of harmless treatment and resource utilization of industrial solid waste. Process solidification is a method for treating various industrial waste residues, and at the same time, the sintered solidified products are utilized in the form of wall bricks. Background technique [0002] Since the 1980s, my country's economy has entered a period of rapid growth, and the amount of industrial solid waste generated and accumulated has been increasing year by year. Since 1992, the annual output of industrial solid waste has been more than 600 million tons. After 2000, the annual output has exceeded 1 billion tons. It is estimated that by 2015, the solid waste and hazardous waste generated by Chinese industrial enterprises (including township enterprises) will reach 23.1 100 million tons and 57 million tons. Over the years, my country has accumulated more than 7 billion tons of industrial waste, occupying more than 1 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C1/00
Inventor 彭兵柴立元王佳张金龙张强闵小波王云燕杨志辉王海鹰
Owner CENT SOUTH UNIV
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