Flue gas desulphuration gypsum-alkaline residue soil stabilizer

A technology of soil stabilizer and desulfurization gypsum, which is applied in the direction of soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., can solve the problems of unreasonable treatment and utilization, ineffective use of alkali slag, and gelation performance of alkali slag Poor and other problems, to achieve good environmental coordination, ease the pressure of environmental protection and resource shortage pressure of building materials enterprises, the effect of adjustable condensing time

Inactive Publication Date: 2013-01-30
中诚正丰环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of alkali slag has not been properly treated and utilized for a long time, which has caused a great impact on the surrounding environment; in addition, due to the poor gelling performance of the alkali slag itself, the current research is not mature, and the alkali slag has not yet been effectively used. use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The basic composition of desulfurization gypsum alkali slag soil curing agent is: 15% desulfurization gypsum, 40% alkali slag, 20% slag micropowder, 5% admixture (sodium silicate) and 20% fly ash.

[0024] Preparation method: First, mix and grind alkali slag, slag fine powder and fly ash for 15 minutes, then add desulfurized gypsum and admixture for 10 minutes of mechanical mixing to obtain desulfurized gypsum alkali slag soil curing agent.

[0025] The curing agent has a 3-day compressive strength of 16.1 MPa, a 3-day flexural strength of 4.5 MPa, a 28-day compressive strength of 37.5 MPa, and a 28-day flexural strength of 7.5 MPa. The stability of the cake test method and the Ray's clip method are all qualified. The initial setting time is 80 minutes, and the final setting time is 155 minutes.

[0026] The 28-day strength of the soil consolidated with 10% of this desulfurized gypsum alkali slag soil curing agent is 0.85MPa, while the 28-day strength of the same soil ...

Embodiment 2

[0028] The basic composition of desulfurization gypsum alkali slag soil curing agent is: 12% desulfurization gypsum, 33% alkali slag, 30% slag powder, 5% admixture (aluminate) and 20% fly ash.

[0029] Preparation method: First, mix and grind alkali slag, slag fine powder and fly ash for 15 minutes, then add desulfurized gypsum and admixture for 10 minutes of mechanical mixing.

[0030] The curing agent has a 3-day compressive strength of 13.1 MPa, a 3-day flexural strength of 3.2 MPa, a 28-day compressive strength of 40.5 MPa, and a 28-day flexural strength of 8.5 MPa. The stability of the cake test method and the Ray's clip method are all qualified. The initial setting time is 95min, and the final setting time is 160min.

[0031] Using 10% of this desulfurized gypsum alkali slag soil curing agent to consolidate the soil has a 28-day strength of 1.05MPa. The 28-day strength of the same soil consolidated with 10% PC32.5 cement is only 0.7MPa.

Embodiment 3

[0033] The basic composition of desulfurization gypsum alkali slag soil curing agent is 20% desulfurization gypsum, 35% alkali slag, 20% slag micropowder, 5% admixture (sulfoaluminate) and 20% fly ash.

[0034] Preparation method: First, mix and grind alkali slag, slag fine powder and fly ash for 15 minutes, then add desulfurized gypsum and admixture for 10 minutes of mechanical mixing.

[0035] The 3-day compressive strength of the curing agent is 12.1 MPa, the 3-day flexural strength is 3.0 MPa, the 28-day compressive strength is 34.5 MPa, and the 28-day flexural strength is 6.5 MPa. The stability of the cake test method and the Ray's clip method are all qualified. The initial setting time is 70 minutes, and the final setting time is 135 minutes.

[0036] Using 10% of this desulfurized gypsum alkali slag soil curing agent to stabilize the soil has a strength of 0.75MPa in 28 days. However, the 28-day strength of the same soil consolidated with 10% PC32.5 cement is only 0.7...

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Abstract

The invention discloses a FGD (flue gas desulphuration) gypsum-alkaline residue soil stabilizer, comprising the following ingredients: 12-30wt% of FGD gypsum, 20-50wt% of alkaline residue, 0-30wt% of slag, 0-5wt% of additive, and 0-20wt% of fly ash; wherein the summation in weight percentage of the ingredients is 100%. The soil stabilizer disclosed herein has the advantages of alleviating the environmental protection pressure of alkaline and power enterprises and resource shortage pressure of building material enterprises, reducing waste discharge burden of enterprises, increasing income, and improving ecological environment.

Description

technical field [0001] The invention relates to the technical field of soil consolidation, in particular to a soil consolidation agent for desulfurized gypsum alkali slag. Background technique [0002] Alkali slag is the solid waste produced during the production of soda ash by the ammonia-soda method in soda-making enterprises, and is one of the industrial wastes. my country's ammonia-soda soda production can reach 4.21 million tons per year. Due to the characteristics of the ammonia-soda soda ash production process, 0.3t of soda slag must be discharged for every 1 ton of soda ash produced. A large amount of alkali slag has not been properly treated and utilized for a long time, which has caused a great impact on the surrounding environment; in addition, due to the poor gelling performance of the alkali slag itself, the current research is not mature, and the alkali slag has not yet been effectively used. use. Invention content: [0003] Aiming at the above-mentioned de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/12C09K17/08C09K103/00
Inventor 孙家瑛顾昕王藐民张敏杰余楠
Owner 中诚正丰环保科技有限公司
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