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Microwave sintering method for granite rock flour ceramsite

A technology of granite powder and microwave sintering, applied in the field of materials, can solve the problems that have never been seen before, and achieve the effects of good economic benefits, saving energy consumption for sintering, and good social benefits

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

AI Technical Summary

Problems solved by technology

However, at present, the research on sintering granite stone powder ceramsite by microwave method has never been seen in domestic and foreign literature.

Method used

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  • Microwave sintering method for granite rock flour ceramsite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) The impurity in the granite stone powder is removed by water washing and sedimentation to obtain a granite stone powder sediment with a particle size less than 0.08mm;

[0029] 2) Dehydrating, drying and drying the granite stone powder sediment and red mud respectively;

[0030] 3) Add 75 parts by weight of granite stone powder and 25 parts by weight of red mud to the mixing bin, add water and stir for 12 minutes, so that the water content is controlled at 11wt%;

[0031] 4) Extrude the mixed material obtained in 3) into raw meal balls with a particle size of 10-15 mm by extruding a ball machine;

[0032] 5) Put the raw material balls into a microwave oven with a frequency of 2.45GHZ, continuously heat up to 300°C at a heating rate of 10°C / min, and dry for 20 minutes; then continuously heat up to 1050°C at a heating rate of 20°C / min , roasted for 5 minutes; then immediately lower the temperature to 750 ° C, and finally let it cool to obtain spherical ceramsite with ...

Embodiment 2

[0035] 1) The impurity in the granite stone powder is removed by water washing precipitation method to reach the granite stone powder sediment whose particle size is less than 0.08mm;

[0036]2) Dehydrating, drying and drying the granite stone powder sediment, red mud and sea mud respectively;

[0037] 3) Stir 10 parts by weight of sea mud and 0.2 parts by weight of microwave induction agent in a dry mixing mixer for 3 minutes to make it evenly stirred;

[0038] 4) Add 64.8 parts by weight of granite stone powder treated in 2), 25 parts by weight of red mud and the material obtained in 3) into the mixing bin, add water and stir for 12 minutes, so that the water content is controlled at 11wt%;

[0039] 5) Extrude the mixed material obtained in 4) into raw meal balls with a particle size of 10-15mm with a ball extrusion machine;

[0040] 6) Put the raw material balls into a microwave oven with a frequency of 2.45GHZ, continuously heat up to 400°C at a heating rate of 12°C / min, ...

Embodiment 3

[0043] 1) The impurity in the granite stone powder is removed by water washing precipitation method to reach the granite stone powder sediment whose particle size is less than 0.08mm;

[0044] 2) Dehydrating, drying and drying the granite stone powder sediment, red mud and sea mud respectively;

[0045] 3) Grinding the high-carbon cinder in a ball mill to obtain a dry powder with a particle size less than 0.06mm;

[0046] 4) Stir 0.2 parts by weight of microwave sensing agent and 9.8 parts by weight of high-carbon cinder treated in 3) in a dry blender for 3 minutes to make them evenly stirred;

[0047] 5) Add 60 parts by weight of granite stone powder, 15 parts by weight of red mud and 15 parts by weight of sea mud treated in 2) and the dry powder obtained in 4) into the mixing bin, add water and stir for 15 minutes, so that the water content is controlled at 16wt %;

[0048] 6) Extrude the mixed material obtained in 5) into raw meal balls with a particle size of 10-15mm wit...

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Abstract

The invention discloses a microwave sintering method for granite rock flour ceramsite. The granite rock flour ceramsite is prepared from the following raw materials in mass percent: 60% to 80% of granite rock flour, 10% to 30% of red mud, 0% to 29% of sea mud, 0% to 20% of high-carbon coal cinder and 0.15% to 0.3% of microwave sensing agent. Bulk density of the prepared high-performance ceramsite is 430 to 1200kg / m<3>, apparent density is 850 to 1700kg / m<3>, water absorption is 5% to 19%, and cylinder compressive strength is 3.5MPa to 9.5MPa. According to the granite rock flour ceramsite disclosed by the invention, waste granite rock flour generated by stone processing plants, sea mud generated by sea dredging and metro construction, industrial solid waste red mud drained by aluminum manufacturers and the like are utilized as the raw materials, and waste utilization rate can be 95% or more; the microwave sintering method has high sintering efficiency, can save sintering energy consumption by 20% to 30% and has better social and economical benefits.

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 granite powder as the main material. Background technique [0002] In recent years, with the rapid development of long-span and high-rise buildings, the research on high-performance lightweight aggregate concrete has attracted more and more attention, and at the same time, it has brought unprecedented market prospects to lightweight aggregate. It is precisely because of the unique porous and lightweight structure of lightweight aggregate that endows lightweight aggregate concrete with a series of excellent properties such as light weight, high strength, thermal insulation, etc. Because of its many excellent properties, ceramsite has an irreplaceable role in other materials, and stands out in light aggregates, and is widely used in light aggregate concrete. Especially the impor...

Claims

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Application Information

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IPC IPC(8): C04B18/02
Inventor 代学灵
Owner FUJIAN JIANGXIA UNIV
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