Ceramic tile prepared from waste fly ash and preparation method thereof

A waste fly ash and ceramic technology is applied in the field of solid waste environmental protection disposal and construction material production, which can solve the problems of high cost of chemicals, cracking strength of products, and strong dependence on natural resources, so as to ensure a healthy and safe environment and meet the requirements of sticky Bonding and strength, the effect of ensuring the uniformity of properties

Active Publication Date: 2019-05-07
JIANGSU ZHONGYI ECOLOGICAL SOIL INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a pursuit of a large amount of fly ash, and the adverse effects of a large amount of calcium oxide in fly ash on the product are not considered; at the same time, it is highly dependent on natural resources, and the compatibility of raw materials is out of touch with the actual production process, especially for sintered products. Compatibility with plastic correction materials may cause cracking or low strength of the product; there is secondary treatment of waste water in wet press molding, especially som

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] 1. Preparation of stabilized fly ash: 84 parts of fly ash, 3 parts of roasted hydrotalcite, 13 parts of tap water, mixed and aged for 3 days to obtain stabilized fly ash;

[0037]2. Composite powder: 42 parts of stabilized fly ash, 8 parts of spontaneous combustion coal gangue powder, 12 parts of third-grade fly ash, 10 parts of construction waste brick powder, 14 parts of dredging and drying sludge powder, shale Powder 14 ingredients, mixed into composite powder, in which CaO+Na 2 O+K 2 O+MgO) / (Al 2 o 3 +SiO2 2 +SO 3 ) is 0.9; CaO / SiO 2 is 1.0; the moisture content of the composite powder is 5.8%.

[0038] 3. Green body preparation: the composite powder is added to the mold, and it is pressed and formed by a universal testing machine with a forming pressure of 8 MPa;

[0039] 4. Green body drying: natural drying into green body to be fired;

[0040] 5. Firing: The body to be fired is heated up to 1250°C at a heating rate of 3°C / h, and kept at this temperature f...

example 2

[0044] 1. Preparation of stabilized fly ash: 77 parts of fly ash, 6 parts of roasted hydrotalcite, 17 parts of tap water, mixed and aged for 2.5 days to obtain stabilized fly ash;

[0045] 2. Composite powder: 35 parts of stabilized fly ash, 15 parts of tertiary fly ash, 8 parts of construction waste brick powder, 12 parts of waste tile powder, 13 parts of unburned coal gangue powder, dredging and dredging and drying sludge 10 parts of powder and 7 parts of construction slag powder are mixed into a composite powder, in which CaO+Na 2 O+K 2 O+MgO) / (Al 2 o 3 +SiO2 2 +SO 3 ) is 1.2; CaO / SiO 2 is 0.7; the moisture content of the composite powder is 6.0%.

[0046] 3. Green body preparation: the composite powder is added to the mold, and it is pressed and formed by a universal testing machine with a forming pressure of 10 MPa;

[0047] 4. Green body drying: natural drying into green body to be fired;

[0048] 5. Firing: The body to be fired is heated up to 1150°C at a heatin...

example 3

[0052] 1. Preparation of stabilized fly ash: 76 parts of fly ash, 4 parts of roasted hydrotalcite, 20 parts of tap water, mixed and aged for 0.5 days to obtain stabilized fly ash;

[0053] 2. Composite powder: 30 parts of stabilized fly ash, 8 parts of tertiary fly ash, 13 parts of construction waste brick powder, 10 parts of waste tile powder, 16 parts of unburned coal gangue powder, 7 parts of shale powder, construction 7 parts of muck powder, mixed into composite powder, in which CaO+Na 2 O+K 2 O+MgO) / (Al 2 o 3 +SiO2 2 +SO 3 ) is 0.6; CaO / SiO 2 It is 0.8; the moisture content of the composite powder is 6.7%.

[0054] 3. Green body preparation: the composite powder is added to the mold, and it is pressed and formed by a universal testing machine with a forming pressure of 12 MPa;

[0055] 4. Green body drying: natural drying into green body to be fired;

[0056] 5. Firing: The body to be fired is heated up to 1300°C at a heating rate of 6°C / h, and kept at this temper...

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Abstract

The invention belongs to the technical field of solid waste environmental protection treatment and building material production, the invention discloses a preparation method of a ceramic tile from waste fly ash, the preparation method comprises: the incineration waste fly ash is mixed with a stabilizer and aged to obtain stabilized fly ash; a composite powder material is prepared from, by weight,25-45% of the stabilized fly ash , 22-55% of a ridge material and 15%-48% of a correcting material by uniformly mixing; the composite powder material is subjected to dry-press molding and natural drying to obtain a to-be-sintered body; and the to-be-sintered body is sintered at a high temperature, and then cooled to obtain the ceramic tile, wherein the stabilizer is roasted hydrotalcite. The method provided by the invention realizes the treatment of fly ash, and harmless and resource utilization of fly ash disposal and utilization are taken into consideration; the dependence on natural resources is reduced from the designed angle of the material, and the fly ash and other solid wastes can be treated and utilized cooperatively, so that harmless and resource synchronization of the bulk solidwaste can be realized.

Description

technical field [0001] The invention relates to the technical fields of solid waste environmental protection disposal and building material production, in particular to a ceramic brick prepared from garbage fly ash and a preparation method thereof. Background technique [0002] The main component of waste incineration fly ash is SiO 2 、Al 2 o 3 , CaO, MgO, Fe 2 o 3 , CuO, K 2 O, Na 2 O, etc., is a useful material that can be utilized as a resource. Through the batching and supporting technology, the resource utilization of waste can be realized, and huge fly ash treatment costs can be saved. For the harmless disposal and resource utilization of fly ash, the current direction of resource utilization of fly ash is mainly the utilization of building materials. By adding a large amount of chemical reagents, clay, industrial waste residue, natural sand, etc., adding water to mix, molding, drying, and sintering at about 1000 ° C to prepare bricks for building materials, th...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/135
CPCY02P40/60
Inventor 张少华薛强陈亿军奉向东王平陈新姜利国席本强
Owner JIANGSU ZHONGYI ECOLOGICAL SOIL INST
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