Method for preparing circulating fluidized bed fuel coal solid-state sulfur slag light concrete

A technology for burning coal to fix sulfur ash and lightweight concrete, which is applied in the field of building materials, can solve the problems of difficult utilization, fly ash difference, secondary pollution of water source, soil, sea and atmosphere, etc., achieves environmental protection, low thermal conductivity, Realize the effect of resource reuse

Inactive Publication Date: 2012-08-01
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the circulating fluidized bed boiler belongs to medium-temperature combustion, and a large amount of desulfurization agent is added during the combustion process, resulting in the fly ash produced by it is very different from that of ordinary pulverized coal furnace fly ash, which is difficult to use in conventional ways. If it is not handled properly It will cause secondary pollution to water sources, soil, sea and atmosphere. With the increasing amount of fly ash discharge, the comprehensive application of fly ash is imminent

Method used

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  • Method for preparing circulating fluidized bed fuel coal solid-state sulfur slag light concrete
  • Method for preparing circulating fluidized bed fuel coal solid-state sulfur slag light concrete

Examples

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Effect test

Embodiment 1

[0029] A method for preparing a circulating fluidized bed coal-fired sulfur-fixed ash lightweight concrete, comprising the following steps:

[0030] Weigh respectively 158g, 72g, 490g, 2.88g and 288g of cement, lime, sulfur-fixed ash, water reducing agent and water, first pour 2 / 3 of the water into the mortar mixing pot, then add cement, lime, Sulfur-fixing ash, then start stirring, and gradually add the water reducing agent dissolved in the remaining 1 / 3 water during the stirring process. At the same time, weigh 60g of water and 3g of foaming agent, and make the two mix and foam to 2L. After stirring for 4 minutes, remove the stirring pot, and stir while adding foam until the volume of the stirred slurry is 1.2L, stop adding foam, and continue stirring until no floating foam is visible on the slurry surface, that is, pouring into the mold.

[0031] According to the provisions of GB / T 11971-1997, the cubic compressive strength test and the dry apparent density test according ...

Embodiment 2

[0033] A method for preparing a circulating fluidized bed coal-fired sulfur-fixed ash lightweight concrete, comprising the following steps:

[0034] Weigh respectively 187g, 86g, 446g, 2.88g and 432g of cement, lime, sulfur-fixed ash, water reducing agent and water, first pour 2 / 3 of the water into the mortar mixing pot, then add cement, lime, Sulfur-fixing ash, then start stirring, and gradually add the water reducer dissolved in the remaining 1 / 3 water during the stirring process. At the same time, weigh 60g of water and 3g of foaming agent, and make the two mix and foam to 2L. After stirring for 4 minutes, remove the stirring pot, and stir while adding foam until the volume of the stirred slurry is 1.2L, stop adding foam, and continue stirring until no floating foam is visible on the slurry surface, that is, pouring into the mold.

[0035] According to the provisions of GB / T 11971-1997, the cubic compressive strength test and the dry apparent density test according to the ...

Embodiment 3

[0037]A method for preparing a circulating fluidized bed coal-fired sulfur-fixed ash lightweight concrete, comprising the following steps:

[0038] Weigh respectively 187g, 86g, 446g, 2.88g and 432g of cement, lime, sulfur-fixed ash, water reducing agent and water, first pour 2 / 3 of the water into the mortar mixing pot, then add cement, lime, Sulfur-fixing ash, then start stirring, and gradually add the water reducing agent dissolved in the remaining 1 / 3 water during the stirring process. At the same time, weigh 60g of water and 3g of foaming agent, and make the two mix and foam to 2L. After stirring for 4 minutes, remove the stirring pot, and stir while adding foam until the volume of the stirred slurry is 0.9L, stop adding foam, and continue stirring until no floating foam can be seen on the slurry surface, that is, pouring into the mold.

[0039] According to the provisions of GB / T 11971-1997, the cubic compressive strength test and the dry apparent density test according ...

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Abstract

The invention discloses a method for preparing circulating fluidized bed fuel coal solid-state sulfur slag light concrete. The method is characterized by comprising the following steps of: pre-treating raw materials, namely grinding solid-state sulfur slag and quick lime; mixing, namely taking 60 to 95 mass parts of solid-state sulfur slag, 0 to 15 mass parts of cement, 0 to 20 mass parts of quick lime, 15 to 65 mass parts of water, and 0.1 to 0.6 mass part of water reducer which are taken as raw materials; adding water into a stirrer, sequentially adding solid-state sulfur slag, cement, quick lime and water reducer, and stirring to obtain slurry; and adding light-weight aggregate and mixing, namely adding 15 to 50 mass parts of light-weight aggregate into the stirrer, and stirring and mixing for 1 to 5 minutes to obtain the circulating fluidized bed fuel coal solid-state sulfur slag light concrete. The concrete prepared by the method has the characteristics of light weight, high intensity, low thermal coefficient, high heat insulation performance and the like; and the recycling of resources is facilitated, the pollution of stacking of the solid-state sulfur slag to environment is reduced, and environment is protected.

Description

technical field [0001] The invention belongs to building materials, and relates to a preparation method of circulating fluidized bed coal-fired sulfur-fixed ash lightweight concrete. It is especially suitable for preparing a kind of lightweight concrete that can be used as a retaining wall, produce composite wall panels, or build sports fields and track and field tracks by using the sulfur-fixed ash, which is the waste discharged from the flue of the circulating fluidized bed boiler. Background technique [0002] Circulating fluidized bed (CFB) combustion technology is a new generation of high-efficiency, low-pollution and clean coal-fired technology that has developed rapidly in the past two decades. It has low cost, high-efficiency desulfurization and low NO X Emissions and other advantages are being favored by more and more power plants. However, the circulating fluidized bed boiler belongs to medium-temperature combustion, and a large amount of desulfurization agent is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/10
CPCY02W30/91
Inventor 严云陈雪梅胡志华夏艳晴
Owner SOUTHWEAT UNIV OF SCI & TECH
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