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Preparation technology of modified fly ash

A preparation process, a technology for fly ash, applied in the directions of alkali metal oxides/hydroxides, inorganic chemistry, water/sludge/sewage treatment, etc. problem, to achieve the effect of excellent modification effect and increase of activation energy

Inactive Publication Date: 2018-04-17
天津海得润滋建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the processing of the fly ash, the basic Ca(OH) 2 Synergistically treat fly ash with gypsum, but in practical applications, the treated fly ash may have weak activity activation, and the low activity of fly ash limits its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation process of modified fly ash, comprising the following preparation steps:

[0034] Step 1: Mix desulfurized gypsum and fly ash and grind them in a ball mill to obtain a mixture, wherein the weight ratio of desulfurized gypsum to fly ash is 1:5;

[0035] Step 2: Treat the mixture with low-temperature plasma;

[0036] Step 3: Add modifier to the mixture after plasma treatment in step 2 and mix evenly, add water to make a slurry, manually stir for 2 minutes, then add it to the cement slurry mixer for automatic stirring, and make it 10cm×10cm after stirring × 40cm blank, placed in a 50 ℃ oven and dried to obtain the finished product.

[0037] The modifier includes 2 parts of montmorillonite, 1 part of graphite powder, 1 part of urotropine, 1 part of fly ash ceramsite and 0.5 part of polyaluminum ferric sulfate.

Embodiment 2

[0039] A preparation process of modified fly ash, comprising the following preparation steps:

[0040] Step 1: Mix desulfurized gypsum and fly ash and grind them in a ball mill to obtain a mixture, wherein the weight ratio of desulfurized gypsum to fly ash is 1:5;

[0041] Step 2: Treat the mixture with low-temperature plasma;

[0042] Step 3: Add modifier to the mixture after plasma treatment in step 2 and mix evenly, add water to make a slurry, manually stir for 2 minutes, then add it to the cement slurry mixer for automatic stirring, and make it 10cm×10cm after stirring × 40cm blank, placed in a 50 ℃ oven and dried to obtain the finished product.

[0043] Modifiers include 2 parts of montmorillonite, 1 part of nano graphite powder, 1 part of urotropine, 1 part of sintered fly ash ceramsite, 0.5 part of polyaluminum ferric sulfate, 1 part of methyl cellulose ether and polypropylene 0.5 part of cellulose ether.

[0044] The preparation process of sintered fly ash ceramsite...

Embodiment 3

[0046] A preparation process of modified fly ash, comprising the following preparation steps:

[0047] Step 1: Mix desulfurized gypsum and fly ash and grind them in a ball mill to obtain a mixture, wherein the weight ratio of desulfurized gypsum to fly ash is 1:6;

[0048] Step 2: Treat the mixture with low-temperature plasma;

[0049] Step 3: Add modifier to the mixture after plasma treatment in step 2 and mix evenly, add water to make a slurry, manually stir for 2 minutes, then add it to the cement slurry mixer for automatic stirring, and make it 10cm×10cm after stirring × 40cm blank, placed in a 50 ℃ oven and dried to obtain the finished product.

[0050] Modifiers include 3 parts of montmorillonite, 1.2 parts of nano-graphite powder, 1.2 parts of urotropine, 1.2 parts of sintered fly ash ceramsite, 0.6 parts of polyaluminum ferric sulfate, 1.2 parts of methyl cellulose ether and polypropylene 0.6 parts of cellulose ether.

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PUM

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Abstract

The invention discloses a preparation technology of modified fly ash. According to key points of the technical scheme of the invention, the preparation technology comprises the following preparation steps: firstly, mixing flue gas desulfurization gypsum and fly ash, and grinding by virtue of a ball grinding mill, thus obtaining a mixed material; secondly, carrying out low temperature plasma treatment on the mixed material; thirdly, adding a modifier into the mixed material subjected to the plasma treatment in the step two, uniformly mixing, adding water, preparing into slurry, artificially stirring for 2-5 minutes, then adding into a cement paste mixer, automatically stirring, preparing into a 10cm*10cm*40cm blank after stirring is completed, placing into a drying oven at the temperature of 50 DEG C, and drying, thus obtaining the finished product. The operation of blending and grinding the flue gas desulfurization gypsum and fly ash can increase activation energy of the fly ash, and then an operation of carrying out low temperature plasma treatment on a blended material can further increase activation energy of the mixed material, so that modification effect in a modifying operation process is excellent.

Description

technical field [0001] The invention relates to the field of fly ash, in particular to a preparation process of modified fly ash. Background technique [0002] Fly ash is solid waste discharged from coal-fired thermal power plants, and it is gradually increasing every year, but its utilization rate is relatively low, and it is mainly used in the construction industry. The accumulation of fly ash in the venue not only occupied a large amount of land resources, but also caused serious environmental pollution. [0003] From the chemical composition of fly ash and the shape of porous particles, it is a good water treatment material. Domestic and foreign studies have shown that fly ash contains more active alumina and silicon oxide, etc., which have strong The adsorption capacity has broad application prospects in wastewater treatment. [0004] The Chinese patent with the notification number CN1115309C discloses a treatment method for fly ash. The process steps of the treatment...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/02B01J20/28C02F1/28
CPCB01J20/02B01J20/28069C02F1/28C02F1/281
Inventor 王卫田刘建顺
Owner 天津海得润滋建材有限公司
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