Pore forming agent granule, preform, foam metal and preparation method thereof

A metal foam and pore-forming agent technology, applied in the field of metal foam, can solve the problems of difficult removal of pore-forming particles, low porosity of open-cell aluminum foam, etc., to improve high-temperature burst resistance, good spherical shape, and increase bulk density Effect

Active Publication Date: 2020-10-30
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a pore-forming agent particle, prefabricated body, metal foam and a preparation method thereof for the problems that traditional pore-forming particles are difficult to remove and the porosity of open-cell aluminum foam is not high.

Method used

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  • Pore forming agent granule, preform, foam metal and preparation method thereof
  • Pore forming agent granule, preform, foam metal and preparation method thereof

Examples

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preparation example Construction

[0041] The embodiment of the present invention also provides a preparation method of the pore-forming agent particles, comprising the following steps:

[0042] mixing the water-soluble inorganic salt, kaolin and bentonite to obtain a mixture;

[0043] Put the mixture into the granulation container of the agglomeration granulation equipment, spray water to granulate, wherein, the rotation speed of the agglomeration granulation equipment is 20r / min~50r / min, and the inclination angle of the granulation container is 40° ~50°;

[0044] After the mixture in the agglomeration granulation equipment forms granules, increase the speed of the agglomeration granulation equipment by 5r / min to 20r / min, and increase the inclination angle of the granulation container by 1° to 5° , last for 3min~5min;

[0045] The granules in the agglomeration granulation equipment are taken out for drying.

[0046] In some embodiments, the mixing of the water soluble inorganic salt, kaolin and bentonite ma...

Embodiment 1

[0066] The components are NaCl microparticles, kaolin and bentonite and are uniformly mixed with a mixer to obtain a mixture. Add the mixed material into the disc of the disc granulator, spray water to granulate, wherein, the rotating speed of the granulator is 20r / min, and the inclination angle of the granulation container is 40°. After the mixture in the disc granulator forms granules, increase the rotational speed of the granulator by 10r / min, and increase the inclination angle of the granulator by 2° for 5 minutes. The granules in the granulator are taken out for drying. The mass percentages of NaCl particles, kaolin and bentonite in the solids in the pore-forming particles were 20%, 75% and 5% respectively, and the mass ratio of water and solids in the process of preparing the pore-forming agent particles was 1:7. The moisture content in the obtained pore former particles was about 9%.

[0067] Use a sieve to sieve the granules within a range of 2 mm for later use, and ...

Embodiment 2

[0073] Divide components into CaCl 2 The powder, kaolin and bentonite are uniformly mixed with a mixer to obtain a mixture. Put the mixture into the disc of the disc granulator, spray water to granulate, wherein, the rotational speed of the granulator is 20r / min-50r / min, and the inclination angle of the granulation container is 40°-50°. After the mixture in the disc granulator forms granules, increase the rotational speed of the granulator by 5r / min to 20r / min, and increase the inclination angle of the granulator by 3° for 3min to 5min. The granules in the granulator are taken out for drying. CaCl in pore-forming particles 2 The mass percentages of powder, kaolin and bentonite in solid are 40%, 55% and 5% respectively. The mass ratio of water and solids during the preparation of pore-forming agent particles is 1:10. The moisture content in the obtained pore former particles was about 7%.

[0074] Use a sieve to screen the granules within a range of 3 mm for use, and stack...

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Abstract

The invention discloses a pore forming agent granule. The granule comprises water soluble inorganic salts, kaolin and bentonite. The mass percentage of water-soluble inorganic salt in the pore formerparticles is 10% to 70%, the mass percentage of kaolin in the pore former particles is 25% to 80%, and the mass percentage of bentonite in the pore former particles is 5% to 10%. The invention furtherdiscloses a preparation method of the pore forming agent granule. The invention further discloses a preform prepared by the pore forming agent granule. The invention further discloses a preparation method of the preform. The invention further discloses a foam metal and a preparation method thereof.

Description

technical field [0001] The invention relates to the technical field of metal foam, in particular to a pore-forming agent particle, a prefabricated body, metal foam and a preparation method thereof. Background technique [0002] Open-cell aluminum foam is a new type of lightweight material that has developed rapidly in recent years, combining structure and functionality. Due to its light weight, high specific stiffness, low density, corrosion resistance, sound absorption performance, energy absorption, It has the advantages of good seismic effect, etc., and has broad application prospects in aerospace, national defense, energy, transportation, machinery, chemical industry, environment and other fields, and has attracted widespread attention at home and abroad. Typical applications include impact shields for aerospace vehicles, rockets, and automobiles, sound-absorbing panels for buildings and traffic, filters in the chemical industry, and radiators. [0003] So far, the pore...

Claims

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Application Information

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IPC IPC(8): C22C1/08B22D25/00
CPCC22C1/08B22D25/005C22C1/082
Inventor 刘源徐法庭万坦王新磊陈祥张华伟
Owner TSINGHUA UNIV
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