Production process for preparing concrete admixture by using waste incineration fly ash molten glass solidified body

A waste incineration fly ash and molten glass technology, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of fly ash pollution and so on

Inactive Publication Date: 2021-05-18

浙江合力海科新材料股份有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0008] The technical problem to be solved in the present invention is: aiming at various defects and deficiencies in the prior art, to provide a production process for preparing concrete admixture by using waste incineration fly ash to melt glass solidified body, the technical problem to be solved is to combine waste incineration fly ash and The auxiliary raw materials are compo...

Abstract

The invention relates to a production process for preparing the concrete admixture by using the waste incineration fly ash molten glass solidified body, which comprises the following steps: (1) compounding waste incineration fly ash and auxiliary materials, and mixing by using a mixer after compounding, so that the waste incineration fly ash and the auxiliary materials are uniformly mixed; (2) putting the uniformly mixed mixture into a briquetting machine, and pressing the mixture into a fly ash block body with the size of 30cm * 30cm * 30cm to 40cm * 40cm * 40cm under the pressure of 6-10MPa; (3) melting the fly ash blocks in a melting furnace to be melted into liquid slag; (4) enabling the liquid slag to flow into water quenching treatment equipment to be subjected to water quenching treatment, wherein the density is increased, and a glass solidified body is formed; and (5) homogenizing the glass solidified body and the mineral active material, and grinding by a ball mill to obtain the high-performance concrete admixture. The method can turn waste into wealth, saves land resources, improves the comprehensive performance of the product by more than 10%, and reduces the production cost by more than 20%.

Application Domain

Solid waste managementGlass shaping apparatus

Technology Topic

QuenchingProcess engineering +8

Examples

Experimental program(2)

Example Embodiment

[0025] Example 1

[0026] (1) Take 1 ton of waste incineration fly ash, and compound the waste incineration fly ash and auxiliary materials. Among them, waste incineration fly ash: auxiliary material is 80:20, among which boric acid: nitrate: sodium bicarbonate: feldspar in the auxiliary material is 15 : 20:25:40, mix with a mixer after compounding, so that the waste incineration fly ash and auxiliary materials are evenly mixed;

[0027] (2) Put the mixed material into the ball making machine, and press it into a fly ash block of 30cm×30cm×30cm under a pressure of 6MPa;

[0028] (3) Put the fly ash block into the melting furnace for melting, the melting temperature is 1600 ℃, and the melting time is 45 minutes. During the melting process, dioxin and organic matter will burn, decompose and gasify, and the chloride salt will melt at 810 ℃. The liquid is discharged through the slag discharge product to achieve the purpose of dechlorination, and the inorganic matter forms a solidified body; a small part of the heavy metals and salts contained in the fly ash form secondary fly ash, and the other part melts into liquid slag;

[0029] (4) After the melting is completed, the liquid molten slag flows into the water quenching treatment equipment for water quenching treatment, and the density increases to form a glass solidified body with a glass phase of 92%;

[0030] (5) The ratio of the glass solidified body and the mineral active material is 75:25. After homogenization, it is ground by a mill to obtain a high-performance concrete admixture.

[0031] In step (5), the active mineral materials are blast furnace slag, vitrified microbeads, alumite and anhydrite, wherein the ratio of blast furnace slag: vitrified microbeads: alumite: anhydrite is 30:25:30:15.

[0032] The melting negative pressure of the fly ash block in the melting furnace is 900-1000Pa.

[0033] According to GB/T 51003-2014 "Technical Specifications for Application of Mineral Admixtures", the 28d activity index of high-performance concrete admixture is 85%, and the fluidity ratio is 105%.

Example Embodiment

[0034] Example 2

[0035] (1) Take 1 ton of waste incineration fly ash, and compound the waste incineration fly ash and auxiliary materials. Among them, the waste incineration fly ash: auxiliary material is 90:10, and in the auxiliary material, boric acid: nitrate: sodium bicarbonate: feldspar is 20 : 15:30:35, mix with a mixer after compounding, so that the waste incineration fly ash and auxiliary materials are evenly mixed;

[0036] (2) Put the mixed material into the ball making machine, and press it into a fly ash block of 40cm×40cm×40cmm under 10MPa pressure;

[0037] (3) Put the fly ash block into the melting furnace for melting, the melting temperature is 1400°C, and the melting time is 60 minutes. During the melting process, dioxin and organic matter will burn, decompose and gasify, and the chloride salt will melt at 810°C. The liquid is discharged through the slag discharge product to achieve the purpose of dechlorination, and the inorganic matter forms a solidified body; a small part of the heavy metals and salts contained in the fly ash form secondary fly ash, and the other part melts into liquid slag;

[0038] (4) After the melting is completed, the liquid molten slag flows into the water quenching treatment equipment for water quenching treatment, and the density increases to form a glass solidified body with a glass phase of 90%;

[0039] (5) The ratio of the glass solidified body and the mineral active material is 80:20. After homogenization, it is ground by a mill to obtain a high-performance concrete admixture.

[0040] In step (5), the active mineral materials are blast furnace slag, vitrified microbeads, alumite and anhydrite, wherein the ratio of blast furnace slag: vitrified microbeads: alumite: anhydrite is 45:15:20:20.

[0041] The melting negative pressure of the fly ash block in the melting furnace is 1100-1200Pa.

[0042] According to GB/T 51003-2014 "Technical Specifications for Application of Mineral Admixtures", the 28d activity index of high performance concrete admixture is 90%, and the fluidity ratio is 110%.

PUM

Property	Measurement	Unit
Melting temperature	1600.0	°C
Melting temperature	1400.0	°C

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