Full-solid-waste burn-free foamed concrete based on tail gas carbonization and preparation method and application thereof

A foamed concrete and exhaust technology, which is applied in application, solid waste management, other household appliances, etc., can solve the problems of insignificant solid waste treatment, unfavorable sustainable development, low solid waste content, etc., to solve the problem of exhaust gas utilization. problems, significant economic benefits, effects of utilizing existing resources

Active Publication Date: 2019-09-06
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method needs to consume a large amount of natural minerals such as limestone, which is not conducive to the ...

Method used

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  • Full-solid-waste burn-free foamed concrete based on tail gas carbonization and preparation method and application thereof

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Embodiment 1

[0039] A method for preparing all-solid waste burning-free foamed concrete based on exhaust gas carbonization, comprising the following steps:

[0040] (1) Put red mud, calcium carbide slag, fly ash, and desulfurized gypsum into the carbonization device first, and pass it into the exhaust gas of the power plant (the concentration of acid gases such as carbon dioxide and sulfur dioxide is between 15-25%), at a temperature of 80 ° C, Carbonization treatment for 3 hours under the conditions of humidity 50% and gas pressure 0.1MPa;

[0041] (2) Mix red mud, calcium carbide slag, fly ash, desulfurized gypsum and chemical waste according to 45%, 35%, 8%, 2%, and 10% carbonized in step (1), and grind to obtain a solid For the mixture, add the solid mixture into the stirring tank, add warm water at 40°C according to the water-cement ratio of 0.2, and add 0.5% of the solid mass of hydrogen peroxide foaming agent and 0.5% of polycarboxylic acid system into the warm water After the water ...

Embodiment 2

[0047] A method for preparing all-solid waste burning-free foamed concrete based on exhaust gas carbonization, comprising the following steps:

[0048] (1) Put red mud, calcium carbide slag, fly ash, and phosphogypsum into the carbonization device first, and pass it into the exhaust gas of the power plant (the concentration of acid gases such as carbon dioxide and sulfur dioxide is between 15-25%), at a temperature of 75 ° C, Carbonization treatment for 2 hours under the conditions of humidity 50% and gas pressure 0.13MPa;

[0049] (2) Red mud, calcium carbide slag, fly ash, phosphogypsum and chemical waste (salt mud) after carbonization in step (1), its main component is: Mg(OH) 2 , CaCO 3 , BaSO 4 and silt, etc.) according to the ratio of 35%, 50%, 6%, 2%, 4%, mixed evenly, pulverized, and then passed through a 180-mesh square hole sieve to obtain a solid mixture, which was added to the mixing tank, according to Add 0.18 water-cement ratio to warm water at 20°C, add 1.5% ...

Embodiment 3

[0051] A method for preparing all-solid waste burning-free foamed concrete based on exhaust gas carbonization, comprising the following steps:

[0052] (1) Put red mud, calcium carbide slag, fly ash, and fluorogypsum into the carbonization device first, and then pass it into the exhaust gas of the power plant (the concentration of acid gases such as carbon dioxide and sulfur dioxide is between 15-25%), at a temperature of 95 ° C, Carbonization treatment for 3.5 hours under the conditions of humidity 55% and gas pressure 0.18MPa;

[0053] (2) Red mud, calcium carbide slag, fly ash, fluorogypsum and chemical waste (salt mud) after carbonization in step (1), its main component is: Mg(OH) 2 , CaCO 3 , BaSO 4 and silt, etc.) according to the ratio of 62%, 25%, 2%, 11%, 10%, mixed uniformly, ground, and then passed through a 150-mesh square hole sieve to obtain a solid mixture, and the solid mixture was added to the mixing tank, according to Add warm water at 50°C to a water-ceme...

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Abstract

The invention belongs to the technical field of full-solid-waste burn-free foamed concrete, and particularly relates to full-solid-waste burn-free foamed concrete based on tail gas carbonization and apreparation method and application thereof. The foamed concrete is prepared from, by weight, 35-62% of red mud, 25-50% of carbide slag, 2-12% of fly ash, 2-18% of industrial gypsum, 4-15% of an alkali activator, 0.5-2% of a foaming agent, 0.5-1% of a water reducing agent and the balance warm water. By adopting chemical waste as the alkali activator, in combination with the red mud, the carbide slag, the fly ash and the industrial gypsum, the foamed concrete with a thermal insulation function is prepared, comprehensive utilization of multiple solid waste is achieved, the problems of low resource utilization of solid waste and utilization of industrial tail gas are solved, more economical and environment-friendly effects are achieved, and the preparation process is easier and more convenient.

Description

technical field [0001] The invention belongs to the technical field of all-solid waste burning-free foamed concrete, and in particular relates to a full-solid waste burning-free foaming concrete based on tail gas carbonization and its preparation method and application. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] With the rapid development of my country's economy, while consuming a lot of resources, it also produces a lot of waste. The key bottleneck restricting its large-scale utilization is the contradiction between product performance and price, low added value and other problems. Utilization methods and product forms are urgently needed. innovation. ...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B38/02C04B38/10C04B20/02C04B18/04C04B18/08C04B18/06
CPCC04B20/023C04B28/006C04B18/0409C04B18/08C04B18/0481C04B18/064C04B22/0006C04B22/068C04B2103/302C04B38/02Y02W30/91
Inventor 彭少杰李召峰张微梦迟民良万盼盼赖靖淇张健
Owner SHANDONG UNIV
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