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Concrete expansion agent containing circulating fluidized bed combustion coal solid sulfur clinker

A coal-fired sulfur-fixing ash and circulating fluidized bed technology, applied in the field of concrete expansion agent composition, can solve the problems of complex production process and high production cost, and achieve the effects of simple production process, low cost and reduced environmental pollution

Inactive Publication Date: 2012-10-31
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the production of concrete expansion agent generally needs to go through processes such as calcination, the production process is relatively complicated, and the production cost is relatively high

Method used

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  • Concrete expansion agent containing circulating fluidized bed combustion coal solid sulfur clinker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A concrete expansion agent containing coal-fired sulfur-fixing ash in a circulating fluidized bed, its composition and mass percentage examples are: 35% of sulfur-fixing ash, 60% of anhydrite, and 5% of lithium slag.

[0025] Preparation method: take each component according to the stated ratio, after crushing and grinding, mix them evenly in a mixer to obtain the product—concrete expansion agent containing coal-fired sulfur-fixing ash in a circulating fluidized bed .

[0026] The performance of the product has been tested to meet the requirements of GB23439-2009.

Embodiment 2

[0028] A concrete expansion agent containing coal-fired sulfur-fixing ash in a circulating fluidized bed, its composition and mass percentage examples are: 40% of sulfur-fixing ash, 50% of anhydrite, and 10% of lithium slag.

[0029] The preparation method is the same as in Example 1. The product—concrete expansion agent containing coal-fired sulfur-fixed ash of circulating fluidized bed has been tested for limited expansion of clean mortar, and the limited expansion rate in water for 7 days is >0.025%, and the expansion rate in air for 21 days is <-0.02%, which meets GB23439-2009 Require.

Embodiment 3-9

[0031] A concrete expansion agent containing coal-fired sulfur-fixing ash in a circulating fluidized bed, its composition and mass percentage are shown in the following table:

[0032]

[0033] The preparation method of embodiment 3-9 is equal to embodiment 1 or 2, omission.

[0034] In the foregoing embodiment: the main chemical composition and mass percentage of the described sulfur-fixing ash can be SiO 2 25.82~43.66%, SO 3 1.26~12.68%, CaO 2.85~21.35%, Al 2 o 3 11.84~28.62%, Fe 2 o 3 3.41~14.28%, K 2 O 0.54~1.09%, Ti 2 O 0.32~1.42%; for example: SiO 2 31.06%, SO 3 11.60%, CaO 19.45%, Al 2 o 3 12.00%, Fe 2 o 3 11.34%, K 2 O 0.55%, Ti 2 O 0.32%; it can also be composed of other mass percentages of sulfur-fixing ash in the prior art.

[0035] In the above-described embodiment: the main chemical composition and mass percentage of the lithium slag can be SiO 2 47.73~58.28%, Al 2 o 3 17.01~18.88%, Fe 2 o 3 1.22~2.7%, CaO 5.57~10.06%, MgO 0.16~1.0...

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Abstract

The invention discloses a concrete expansion agent containing circulating fluidized bed combustion coal solid sulfur clinker. The concrete expansion agent is characterized by comprising the following components in percentage by mass: 30 to 50 percent of solid sulfur clinker, 40 to 65 percent of anhydrite and 5 to 30 percent of lithium slag. During preparation, after the components are crushed andground, the components are taken according to the proportion and mixed uniformly to obtain a product without calcining. Because industrial wastes such as the solid sulfur clinker, the lithium slag and the like are used as main raw materials, the concrete expansion agent changes the wastes into valuable, has low cost, reduces environmental pollution, has simple production process, low energy consumption and good performance, and has market competitiveness and strong practicability compared with like products.

Description

technical field [0001] The invention belongs to a concrete expansion agent composition containing combustion waste such as sulfide, and relates to a concrete expansion agent containing coal-fired sulfur-fixing ash in a circulating fluidized bed. It is suitable for preparing concrete expansion agent mainly by using waste sulfur-fixing ash and lithium slag. Background technique [0002] Circulating fluidized bed combustion (CFBC for short) technology is an advanced clean coal-fired technology that fixes sulfur during the combustion process. It has wide adaptability to coal types, high combustion efficiency and sulfur fixation efficiency, and good load regulation performance. Low cost of sulfur fixation, etc., can effectively reduce coal-fired sulfur dioxide and NO X emissions, reduce air pollution, and benefit environmental protection, and have been vigorously developed and promoted. Circulating fluidized bed (CFB) coal-fired sulfur-fixed ash is the combustion reaction of su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14
CPCC04B22/008C04B40/0039C04B2111/00215Y02W30/91C04B18/08C04B18/144C04B20/02C04B20/026C04B22/143C04B28/02
Inventor 陈德玉刘欢
Owner SOUTHWEAT UNIV OF SCI & TECH
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