Microwave sintering method of sea mud ceramsite

A technology of microwave sintering and sea mud, which is applied in the field of materials, can solve the problems of production raw materials and production equipment limitations, difficult to guarantee fly ash resources, high pollution, etc., to save sintering energy consumption, increase drying and sintering speed, and sinter high efficiency effect

Inactive Publication Date: 2017-05-31
FUJIAN JIANGXIA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In recent years, with the improvement of building energy saving and earthquake resistance requirements, construction projects need a large amount of lightweight, high-strength, thermal insulation, and high-performance ceramsite as aggregate. The existing ceramsite preparation technology has been able to prepare high-performance ceramsite Performance ceramsite (Huang Shaowen, Guo Canxian, Xu Yuhua, etc. Experimental research on the preparation of light and high-strength spherical ceramsite from red mudstone [J]. Nonmetallic Minerals, 2004, 27(6): 11-13.), but the existing ceramsite mainly It is clay ceramsite and fly ash ceramsite, and the traditional high energy consumption and high pollution fuel type rotary kiln is used
At present, the application of clay is limited, and the extensive application of fly ash in engineering also makes it difficult to guarantee fly ash resources, and a large number of traditional sintering kilns have been shut down due to environmental protection policies
The production raw materials and production equipment of ceramsite are limited, which has become the bottleneck of high-performance ceramsite production

Method used

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  • Microwave sintering method of sea mud ceramsite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Using sea mud with Fujian characteristics, after separation, drying and homogenization, its chemical composition is identified and analyzed. The mass fraction of each chemical composition in sea mud is SiO 2 53.3%, Al 2 o 3 18.2%, Fe 2 o 3 8.35%, CaO2.04%, MgO2.84%, TiO2 2 0.72%, Na 2 O 2.02%, K 2 O 1.58%, Cl - 1.06%, loss on ignition (IL) 8.25%;

[0025] 2) Humidity adjustment of sea mud, that is, first take part of the sea mud and dry it in the drying furnace, then determine the density of the completely dried sea mud, and then dry the sea mud used, when the density is 1.1 times the density of the completely dried sea mud After that, its water content is 10%;

[0026] 3) After homogenizing the sea mud, extrude it into raw meal balls with a particle size of 10~15mm with an extrusion ball machine;

[0027] 4) Put the raw material balls into a microwave oven with a frequency of 2.45GHZ, continuously heat up to 350°C at a heating rate of 12°C / min, and dry f...

Embodiment 2

[0030] 1) Using sea mud with Fujian characteristics, after separation, drying and homogenization, its chemical composition is identified and analyzed. The mass fraction of each chemical composition in sea mud is SiO 2 53.3%, Al 2 o 3 18.2%, Fe 2 o 3 8.35%, CaO2.04%, MgO2.84%, TiO2 2 0.72%, Na 2 O 2.02%, K 2 O 1.58%, Cl - 1.06%, loss on ignition (IL) 8.25%;

[0031] 2) Use the gravity separation method to remove the impurities in the selected sea mud;

[0032] 3) Use a ball mill to grind the waste ceramic bricks to obtain a powder with a particle size of 0.08~0.12mm;

[0033] 4) Mix 10% blast furnace aluminum ore powder, 20% waste ceramic brick powder and 70% sea mud, and stir in the mixing bin for 10 minutes to make it evenly stirred and control the water content at 10%;

[0034] 5) Extrude the mixed material obtained in 4) into raw meal balls with a particle size of 10-15 mm with a ball extrusion machine;

[0035] 6) Put the raw material balls into a microwave oven...

Embodiment 3

[0038] 1) Using sea mud with Fujian characteristics, after separation, drying and homogenization, its chemical composition is identified and analyzed. The mass fraction of each chemical composition in sea mud is SiO 2 53.3%, Al 2 o 3 18.2%, Fe 2 o 3 8.35%, CaO2.04%, MgO2.84%, TiO2 2 0.72%, Na 2 O 2.02%, K 2 O 1.58%, Cl - 1.06%, loss on ignition (IL) 8.25%;

[0039] 2) Use the gravity separation method to remove the impurities in the selected sea mud;

[0040] 3) Use a ball mill to grind the waste ceramic bricks to obtain a powder with a particle size of 0.08~0.12mm;

[0041] 4) Mix 15% blast furnace aluminum ore powder, 20% waste ceramic brick powder and 65% sea mud, and stir in the mixing bin for 15 minutes to make it evenly stirred and control the water content at 10%;

[0042] 5) Extrude the mixed material obtained in 4) into raw meal balls with a particle size of 10-15 mm with a ball extrusion machine;

[0043] 6) Put the raw material balls into a microwave ov...

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Abstract

The invention discloses a microwave sintering method of sea mud ceramsite. The sea mud ceramsite is prepared from raw materials in percentage by mass as follows: 60%-100% of sea mud, 0%-30% of waste ceramic tile powder and 0%-20% of blast-furnace aluminium ore powder. In terms of the prepared high-performance ceramsite, bulk density is 400-1,100 kg / m<3>, apparent density is 800-1,600 kg / m<3>, water absorption is 5%-18% and cylinder compressive strength is 3.0 MPa-10.0 MPa. The raw materials comprise marine sludge produced through marine dredging and metro construction, waste ceramic pulverized powder of a ceramic tile factory and the blast-furnace aluminium ore powder produced in an aluminium factory, utilization rate of waste reaches 95% or higher, and good social benefit is obtained; the microwave sintering method is high in sintering efficiency, can reduce sintering energy consumption by about 25% and has better economic benefit.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a method for sintering high-performance spherical ceramsite using a microwave sintering method with sea mud as the main material. Background technique [0002] In recent years, with the improvement of building energy saving and earthquake resistance requirements, construction projects need a large amount of lightweight, high-strength, thermal insulation, and high-performance ceramsite as aggregate. The existing ceramsite preparation technology has been able to prepare high-performance ceramsite. Performance ceramsite (Huang Shaowen, Guo Canxian, Xu Yuhua, etc. Experimental research on the preparation of light and high-strength spherical ceramsite from red mudstone [J]. Nonmetallic Minerals, 2004, 27(6): 11-13.), but the existing ceramsite mainly It is clay ceramsite and fly ash ceramsite, and the traditional high energy consumption and high pollution fuel type rotary kiln is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B33/132C04B33/138
CPCC04B33/1321C04B33/1324C04B33/1328C04B33/138C04B38/009Y02P40/60
Inventor 代学灵蒋国平郑小青江碧娟代书凝代书剑
Owner FUJIAN JIANGXIA UNIV
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