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Method for manufacturing silicate product by ceramic waste hydrothermal process

A technology of ceramic waste and ceramic waste powder, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of high grinding energy consumption, low product strength, etc., and achieve product strength improvement and good performance , cost reduction effect

Inactive Publication Date: 2008-09-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, sand powder is made of sand through grinding. As a natural material, sand mining has been restricted in many places, and the grinding process requires high grinding energy consumption; although fly ash can be used for autoclaved aerated concrete masonry blocks, autoclaved bricks, and plates, but under similar hydrothermal and proportioning conditions, the product strength is lower than that of the products prepared by the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0018] Examples 1-4: Utilizing ceramic waste to manufacture autoclaved aerated concrete blocks and plates

Embodiment 1

[0019] Embodiment 1 Utilizes ceramic polished brick powder to manufacture autoclaved aerated concrete block

[0020] Add 1.10 tons of polished brick powder, 0.42 tons of lime, 0.10 tons of cement, 0.04 tons of gypsum, 0.6 kg of aluminum powder, add 1.0 tons of water, stir well, and inject the stirred material into a 6.07m×1.5m×1.25m steel mold, and send After airing, stop for 2 hours, cut into blocks and put them in an autoclave, and autoclave at a constant temperature of 210°C for 10 hours with a steam pressure of 1.3 MPa to obtain an autoclaved aerated concrete block. After testing, the performance of the autoclaved aerated concrete block is excellent, the volume density level is B06, and the average compressive strength is 6.0Mpa. The compressive strength of the prepared product is 30% higher than that of the air-entrained concrete with the same bulk density made of fly ash. In addition, the use of hydrothermal method does not require high-temperature firing, and consumes ...

Embodiment 2

[0021] Embodiment 2 Utilizes ceramic polished brick powder to manufacture autoclaved aerated concrete blocks

[0022] Add 0.55 tons of polished brick powder, 0.55 tons of fly ash, 0.46 tons of lime, 0.18 tons of cement, 0.06 tons of gypsum, 0.3 kg of aluminum powder, add 1.3 tons of water, stir well, and inject the stirred material into 6.07m×1.5m×1.25 In the m steel mold, stop for 1.5 hours after gas generation, cut into blocks and put them in an autoclave, and autoclave at a constant temperature of 200 ° C for 6 hours, with a steam pressure of 1.15 MPa, to obtain autoclaved aerated concrete blocks. After testing, the performance of the autoclaved aerated concrete block is excellent, the volume density level is B06, and the average compressive strength is 5.5Mpa. The compressive strength of the prepared product is 18% higher than that of the air-entrained concrete with the same bulk density made of fly ash.

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Abstract

The invention discloses a method for preparing silicate products under the hydrothermal conditions of ceramic wastes. The silicate products mainly refers to autoclaved aerated concrete blocks or plates, autoclaved sand-lime bricks, autoclaved silicate pipe pile prefabricated parts and autoclaved silicate bricks. The method includes: evenly mixing waste ceramic particles and powder with raw materials such as lime and gypsum in proportion; preparing silicate products such as aerated concrete blocks, bricks, plates and prefabricated parts under autoclaved or steam curing hydrothermal condition. The autoclave is for 4-10 hours at a constant temperature of 175-210 DEG C and under the vapor pressure of 1.0-1.3 Mpa; steam curing is to steam cure 24-48 hours at a constant temperature of 70-100 DEG C. The invention makes good use of the waste of ceramics generated in the process. The silicate products has advantages of high intensity, saved soil and energy, environmental friendliness and waste-utilization and has remarkable economic benefit and social effect.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of ceramic waste, and mainly refers to the production of silicate products under autoclaved or steam-cured hydrothermal conditions by using waste ceramic grains and powders and raw materials such as lime, cement, sand, stone and gypsum. The silicate products of the present invention mainly refer to autoclaved aerated concrete blocks or plates, autoclaved lime-sand bricks, silicate pipe pile prefabricated parts and autoclaved silicate bricks. Background technique [0002] With the rapid development of social economy and ceramic industry, ceramic industry waste is increasing day by day. Currently, these waste residues are mainly disposed of in landfills. This treatment method consumes manpower and material resources, pollutes groundwater quality, and also occupies a large amount of land resources. How to turn waste into wealth and turn waste into resources has become a research h...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B28/04C04B18/16C04B18/08C04B22/14C04B22/04C04B14/06
CPCC04B2111/00017C04B28/18Y02W30/91C04B7/00C04B14/02C04B18/08C04B18/165C04B22/04C04B22/143C04B40/024C04B2103/302C04B24/18C04B24/226C04B24/2641
Inventor 苏达根钟明峰王功勋张志杰赵一翔
Owner SOUTH CHINA UNIV OF TECH
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