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Circulating fluidized bed sulfur fixation ash aerated concrete and preparation method thereof
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A circulating fluidized bed and air-entrained concrete technology, which is used in the manufacture of tools, ceramic products, solid waste management, etc. environment, reducing large-scale stacking, and the effects of excellent finished product performance
Inactive Publication Date: 2012-10-10
SOUTHWEAT UNIV OF SCI & TECH
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Problems solved by technology
In the existing technology, there are few utilization technologies of circulating fluidized bed (CFB) sulfur-fixing ash, and a large amount of sulfur-fixing ash is in a state of simple stacking and random discharge, which not only occupies a lot of land resources, but also pollutes the atmosphere, water, soil and biological environment , and even endanger human health
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Embodiment 1
[0035] A method for preparing a circulating fluidized bed sulfur-fixed ash aerated concrete, comprising the following steps:
[0036] a. Grinding: Grinding the sulfur-fixed ash (equipment in the prior art such as ball mill, vibrating mill, jet mill, etc.) to a particle size of 0.08mm and a sieve residue of 4.3-7.9%, with a median particle size of 10.394-13.928um ;
[0037] B. Weighing: Weigh quicklime, air-entraining agent aluminum powder 0.14% (that is, the consumption of aluminum powder is 0.14% of other raw materials weight) by 12% of sulfur-fixed ash (percentage by weight, the same below), water and other raw materials The ratio by weight is 0.59; the total amount of powder prepared in this embodiment is 1010g, and the specific data are weighed as follows:
[0038] Fluidized bed sulfur-fixed ash 900g; quicklime 110g; aluminum powder 1.4g; water 595g;
[0039] c. Stirring: first put the sulfur-fixed ash and quicklime powder into the mixer and stir for 1mim. After the powd...
Embodiment 2
[0046] A circulating fluidized bed sulfur-fixed aerated concrete is composed of fluidized bed sulfur-fixed ash, quicklime, aluminum powder and water, and the specific data are weighed as follows:
[0047] Fluidized bed sulfur-fixed ash 900g; quicklime 110g; aluminum powder 1.3g; water 590g;
[0048] The preparation method and steps of the air-entrained concrete are the same as in Example 1;
[0049] Measure the strength of the present embodiment air-entrained concrete to be 4.18MPa, and the density is 623kg / m 3 .
Embodiment 3
[0051] A circulating fluidized bed sulfur-fixed aerated concrete is composed of fluidized bed sulfur-fixed ash, quicklime, aluminum powder and water, and the specific data are weighed as follows:
[0052] Fluidized bed sulfur-fixed ash 900g; quicklime 110g; aluminum powder 1.4g; water 590g;
[0053] The preparation method, steps and curing conditions of the air-entrained concrete are the same as in Example 1;
[0054] Measure the strength of the air-entrained concrete of this embodiment to be 3.81MPa, and the dry density is 617kg / m 3 .
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Abstract
The invention discloses circulating fluidized bed sulfur fixation ash aerated concrete, which is characterized in that the circulating fluidized bed sulfur fixation ash aerated concrete comprises the following ingredients by weight parts: 65 to 95 parts of fluidized bed sulfur fixation ash, 5 to 20 parts of quicklime, 0 to 15 parts of cement, 0.12 to 0.18 part of aluminum powder and 56 to 65 parts of water. A preparation method of the aerated concrete comprises the following steps of powder grinding of the sulfur fixation ash, material preparation according to the composition and the mixture ratio, mixing and stirring, air bleeding and the like. The invention uses the sulfur fixation ash as major raw materials, no or little cement is added into the materials, and alkali is added into the materials for excitation. Products are in sealed porous structures, and have the characteristics of light weight, high intensity, small heat conductive coefficient, good thermal preservation and heat insulation performance, and the like. When being adopted, the invention is favorable for realizing the reutilization of resources, can reduce the environment pollution caused by sulfur fixation ash piling, and can protect the environment.
Description
technical field [0001] The invention belongs to a concrete composition containing combustion waste such as sulfide and a preparation method thereof, and relates to a circulating fluidized bed sulfur-fixed ash aerated concrete and a preparation method thereof. It is suitable for mainly using waste to prepare a low-carbon emission lightweight building material. Background technique [0002] With the rapid development of economic construction and the continuous improvement of people's living standards, the energy consumed by buildings is increasing day by day, of which the energy consumption of heating and air conditioning accounts for a large proportion, especially in hot summer and cold winter areas in our country. Energy saving has become the key point of today's building materials Direction of development. The current building energy-saving external wall insulation system mainly uses raw materials such as polystyrene board, extruded plastic board, and foamed silicate board...
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