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Method for improving microwave curing efficiency of artificial stone

A microwave curing and artificial stone technology, applied in the field of artificial stone preparation, can solve the problems of poor microwave thermal effect, high energy consumption, and small dielectric loss, and achieve the effects of shortening microwave curing time, high thermal conductivity, and reducing microwave power

Pending Publication Date: 2022-04-12
GUANGXI ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the process of microwave solidification of artificial stone, due to the low dielectric constant of organic polymer binder, styrene solvent and inorganic aggregate, the dielectric loss is small, resulting in poor microwave thermal effect, and high power input is required. Microwaves can make blocks achieve rapid solidification, so the energy consumption is relatively large

Method used

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  • Method for improving microwave curing efficiency of artificial stone
  • Method for improving microwave curing efficiency of artificial stone
  • Method for improving microwave curing efficiency of artificial stone

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A method for improving the efficiency of microwave solidified artificial stone, comprising the following steps:

[0024] (1) Mix vinylsilane, lower alcohol and deionized water evenly to obtain a mixed solution, the mass concentration of vinylsilane in the mixed solution is 3wt%, and the mass ratio of lower alcohol and deionized water is 2:1, and then the mixed solution is used Adjust the pH to 5 with glacial acetic acid, and stir and react at 30°C for 90 minutes to obtain a silane hydrolysis solution; add silicon carbide to the silane hydrolysis solution, stir and react at 30°C and a stirring speed of 300r / min for 45 minutes, and then After standing for 40 minutes, the modified silicon carbide particles were obtained by filtration, and then washed twice with absolute ethanol and deionized water to remove excess vinyl silane on the surface of the silicon carbide particles, and then the modified silicon carbide particles were placed in an oven at 65°C Internal heating and...

Embodiment 2

[0028] A method for improving the efficiency of microwave solidified artificial stone, comprising the following steps:

[0029] (1) Mix vinylsilane, lower alcohol and deionized water evenly to obtain a mixed solution. The mass concentration of vinylsilane in the mixed solution is 5wt%, and the mass ratio of lower alcohol and deionized water is 3:1, and then the mixed solution is used Adjust the pH to 4 with glacial acetic acid, and stir the reaction at 25°C for 120 minutes to obtain a silane hydrolysis solution; add silicon carbide to the silane hydrolysis solution, stir and react at 40°C and a stirring speed of 200r / min for 30 minutes, and then After standing for 30 minutes, filter the modified silicon carbide particles, then wash them twice with absolute ethanol and deionized water to remove excess vinyl silane on the surface of the silicon carbide particles, and then place the modified silicon carbide particles in an oven at 50°C Internal heating and solidification for 30 m...

Embodiment 3

[0033] A method for improving the efficiency of microwave solidified artificial stone, comprising the following steps:

[0034](1) Mix vinylsilane, lower alcohol and deionized water evenly to obtain a mixed solution, the mass concentration of vinylsilane in the mixed solution is 4wt%, and the mass ratio of lower alcohol and deionized water is 4:1, and then the mixed solution is used Adjust the pH to 6 with glacial acetic acid, and stir and react at 35°C for 60 minutes to obtain a silane hydrolysis solution; add silicon carbide to the silane hydrolysis solution, stir and react at 45°C and a stirring speed of 400r / min for 60 minutes, and then After standing for 50 minutes, the modified silicon carbide particles were obtained by filtration, and then washed three times with absolute ethanol and deionized water to remove excess vinylsilane on the surface of the silicon carbide particles, and then the modified silicon carbide particles were placed in an oven at 75°C Internal heating...

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Abstract

The invention discloses a method for improving microwave curing efficiency of artificial stone, which comprises the following steps: uniformly mixing a vinyl silane coupling agent, low alcohol and deionized water, adjusting the pH value to 4-6 by using glacial acetic acid, preparing a silane hydrolysis solution, adding silicon carbide into the silane hydrolysis solution, stirring for reaction, standing, and filtering to obtain modified silicon carbide particles; washing to remove redundant vinyl silane on the surfaces of the silicon carbide particles, heating and curing the modified silicon carbide particles, and cooling to normal temperature for later use; marble particles and modified silicon carbide particles are evenly mixed to obtain aggregate, then a binder and an auxiliary are added into the aggregate to be stirred into a cluster, then the cluster is injected into a mold, and uncured artificial stone quarry stone is obtained through vacuum vibration compression molding; and curing the artificial stone block under a microwave condition to obtain the artificial stone. The heating rate of the artificial stone in microwave treatment is effectively improved, so that the curing time is shortened, the energy consumption is reduced, and meanwhile, the mechanical strength of the artificial stone is improved.

Description

technical field [0001] The invention belongs to the technical field of artificial stone preparation, and in particular relates to a method for improving the efficiency of microwave solidified artificial stone. Background technique [0002] Artificial stone is made of natural marble, dolomite, quartz sand, calcite, glass or other inorganic fillers as aggregate, unsaturated polyester resin and organic polymer materials such as methyl methacrylate as binder, and then added in a certain proportion Initiators, accelerators and pigments, etc., are processed through stirring and mixing, curing and molding, sawing and polishing. At present, artificial stone curing methods mainly include normal temperature placement, steam curing, tunnel furnace, ultraviolet curing and microwave curing. Studies have shown that using microwaves to post-cure large-scale artificial stone blocks can shorten the curing time of artificial stone from 10 to 15 days in the traditional normal temperature plac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/04C04B20/10C04B40/02C04B14/32C04B14/28
Inventor 黄志民莫秋凤徐梦雪黄译锋马蓝宇赖文钦郑益华谢松伯房严严黎演明
Owner GUANGXI ACAD OF SCI
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