Method for activating latent activity and improving the quality of fly ash

A kind of fly ash and potential technology, applied in the field of compound activation of the potential activity of fly ash and improving the quality of fly ash, can solve the problems of not mentioning physical-chemical multi-component compound activation, not mentioning fly ash, etc. The effect of improving chemical reaction ability, improving chemical activity and reducing surface energy

Inactive Publication Date: 2006-09-27
UNIV OF SCI & TECH BEIJING
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  • Summary
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  • Description
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AI Technical Summary

Problems solved by technology

However, there is no mention of physical-chemical multi-component activation of low-quality fly ash on the basis of optimizing chemical components such as industrial waste slag and natural inorganic minerals, and it does not mention whether the compound formula can make the various components of fly ash All indicators have reached Class I fly ash standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The undisturbed fly ash is taken from Beijing Shijingshan Power Plant, and its various indicators are: fineness (0.045μm) is 58.6%, water demand ratio is 115%, and burning vector is 1.85%. Add 4.0% gypsum, 4.0% alunite, 10.0% steel slag, 1% seed crystal and 0.3% dispersant by weight of fly ash to the original fly ash. CaSO in gypsum 4 2H 2 The content of O is 85.0Wt.%. The raw material of gypsum should be in the form of small blocks without large blocks larger than 3cm; Al in alunite 2 o 3 The content of 22.0Wt.%, SO 3 The content of alunite is 12.0Wt.%; the raw material of alunite is small block, and there is no large block larger than 3cm; the components in the industrial waste residue are: Al 2 o 3 16Wt.%; SiO 2 35Wt.%; MgO 0.3Wt.%; CaO 40.0Wt.%; Fe 2 o 3 0.5Wt.%; loss on ignition 0.58Wt.%. Then enter into the ball mill to grind together, and the fly ash passing through the 0.045 μm square hole sieve will enter the finished product bin from the sorting eq...

Embodiment 2

[0023] The undisturbed fly ash is taken from Beijing Zhangjiakou Power Plant, and its various indicators are: fineness (0.045μm) is 43.2%, water demand ratio is 108%, and burning vector is 2.98%. Add 2.0% gypsum, 3.0% alunite, 5.0% steel slag, 0.5% seed crystal and 0.25% dispersant by weight of fly ash to the original fly ash. CaSO in gypsum 4 2H 2 The content of O is 91.0Wt.%. The raw material of gypsum should be small lumps without large lumps larger than 3cm; Al in alunite 2 o 3 The content of 24.0Wt.%, SO 3 The content of alunite is 10.5Wt.%; the raw material of alunite should be small blocks, without large blocks larger than 3cm; the components in the industrial waste residue are: Al 2 o 3 11Wt.%; SiO 2 44Wt.%; MgO 2.0Wt.%; CaO 32Wt.%; Fe 2 o 3 1.0Wt.%; loss on ignition 1.80Wt.%. Then enter into the ball mill to grind together, and the fly ash passing through the 0.045 μm square hole sieve will enter the finished product bin from the sorting equipment, and the...

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PUM

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Abstract

The invention discloses a compounding activation coal ash latent active and improving coal ash quality method in the building material domain, which is characterized by the following: using II, III degree coal ash for raw material; adding in 2.0-4.0% calcium sulfate, 3.0-4.0% alum stone, 5.0-10.0% industrial residue(such as steel scoria, slag), 1-2% inoculating crystal and a little disperser in coal ash weight; putting the above material and raw condition coal ash in ball grinder to jevigate; filling coal ash with 0.045 mum square hole screen in stocking yard by separation equipment; grinding the coal ash with larger 0.045 mum square hole screen until the fineness of coal ash (0.045 mum) is smaller than 10%. The method can make the low-grade coal ash to become I-grade or high grade coal ash, which meet the demand of the market.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a method for compoundly activating the latent activity of fly ash and improving the quality of fly ash. Background technique [0002] With the rapid development of commercial concrete industry and high-performance concrete technology, fly ash as a concrete admixture is recognized as the sixth component of commercial concrete. It plays an increasingly important role in improving the performance of fresh concrete, improving the physical and mechanical properties and durability of concrete. It can be said that the admixture technology of fly ash has become a technology that has the greatest impact on the progress of concrete technology after the invention of concrete admixtures. In the final analysis, it is a comprehensive technical measure to reduce the amount of cement, improve construction performance, improve physical and mechanical properties, prolong service life, and improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/08C04B22/14C04B24/18C04B20/00
CPCY02W30/91
Inventor 刘娟红宋少民李政倪文李建平
Owner UNIV OF SCI & TECH BEIJING
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