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Method for quickly sintering ceramsite

A rapid sintering and ceramsite technology, applied in the field of traditional technological innovation, can solve the problems of great influence of ceramsite sintering, high loss on ignition, large bulk density of ceramsite, etc., and achieves wide access, simple process and convenient operation. Effect

Active Publication Date: 2020-09-04
浙江慧科环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that in addition to the matching of raw materials, the heating technology has a great influence on the firing of ceramsite
At present, ceramsite is generally fired by heating kiln, which has problems such as slow heating of raw materials, long firing time, high bulk density of fired ceramsite and high loss on ignition.

Method used

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  • Method for quickly sintering ceramsite
  • Method for quickly sintering ceramsite
  • Method for quickly sintering ceramsite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The influence of embodiment 1 sodium phosphate and sodium silicate mass ratio on the performance of sintered ceramsite

[0018] The sintered ceramsite of the present invention: mechanically grind silicon carbide for 1 hour, and pass through a 200-mesh sieve to obtain silicon carbide powder. Weigh sodium phosphate and Sodium silicate, mixed to obtain nine groups of alkali-activated powders. According to the solid-to-liquid ratio of 0.2:1 mg / mL, the nine groups of alkali-activated powders were mixed with water, and stirred until the sodium phosphate and sodium silicate were completely dissolved to obtain nine groups of bonding solutions. According to the solid-to-liquid ratio of 0.5:1mg / mL, the silicon carbide powder and the bonding solution were mixed and stirred evenly to obtain nine sets of thermal conductive pastes. Apply the nine groups of heat-conducting paste evenly on the nine groups of ceramsite to be sintered, then dry them, and finally perform high-frequency ...

Embodiment 2

[0031] Example 2 Effect of solid-liquid ratio of silicon carbide powder and bonding solution on properties of sintered ceramsite

[0032]The sintered ceramsite of the present invention: mechanically grind silicon carbide for 2 hours, and pass through a 300-mesh sieve to obtain silicon carbide powder. Sodium phosphate and sodium silicate were weighed according to the mass ratio of sodium phosphate and sodium silicate of 12:100, and mixed to obtain an alkali-activated powder. According to the solid-to-liquid ratio of 0.6:1 mg / mL, mix the alkali-activated powder with water and stir until the sodium phosphate and sodium silicate are completely dissolved to obtain a bonding solution. According to the solid-liquid ratio 0.25:1mg / mL, 0.35:1mg / mL, 0.45:1mg / mL, 0.5:1mg / mL, 1.0:1mg / mL, 1.5:1mg / mL, 1.6:1mg / mL, 1.8:1mg / mL mL, 2.0:1 mg / mL Mix the silicon carbide powder with the bonding solution and stir evenly to obtain nine sets of thermal paste. Apply the nine sets of thermal paste eve...

Embodiment 3

[0037] Embodiment 3 The influence of the thickness of thermally conductive paste coating on the performance of sintered ceramsite

[0038] The sintered ceramsite of the present invention: mechanically grind silicon carbide for 3 hours, and pass through a 400-mesh sieve to obtain silicon carbide powder. Sodium phosphate and sodium silicate were weighed according to the mass ratio of sodium phosphate and sodium silicate of 12:100, and mixed to obtain an alkali-activated powder. According to the solid-to-liquid ratio of 1:1 mg / mL, mix the alkali-activated powder with water and stir until the sodium phosphate and sodium silicate are completely dissolved to obtain a bonding solution. According to the solid-liquid ratio of 1.5:1mg / mL, the silicon carbide powder was mixed with the bonding solution, and stirred evenly to obtain a thermally conductive paste. The thermal conductive paste is evenly coated on the nine groups of ceramsite to be sintered according to nine different coating...

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Abstract

The invention discloses a method for quickly sintering ceramsite, and the method comprises the following steps: mechanically grinding silicon carbide for 1-3 hours, and sieving with a 200-400-mesh sieve to obtain silicon carbide powder; weighing sodium phosphate and sodium silicate, and mixing to obtain alkali-activated powder; mixing water with the alkali-activated powder, and stirring until thesodium phosphate and the sodium silicate are completely dissolved to obtain a bonding solution; mixing the silicon carbide powder with the bonding solution, and uniformly stirring to obtain heat-conducting slurry; uniformly coating to-be-sintered ceramsite with the heat-conducting slurry, then drying, and finally performing high-frequency induction heating on the dried ceramsite for 2-8 minutes toobtain the sintered ceramsite. The method is simple in process, convenient to operate and wide in raw material obtaining way. Compared with a traditional ceramsite firing mode, the ceramsite firing method has the advantages that the consumed time is short, the ceramsite compaction density is reduced by 45.86% to the maximum extent, the fired ceramsite strength is improved by 56.97% to the maximumextent, and the ceramsite ignition loss is reduced by 35.92% to the maximum extent.

Description

technical field [0001] The invention relates to the field of traditional technical innovation, in particular to a method for rapidly sintering ceramsite. Background technique [0002] As a light aggregate in building materials, ceramsite has been widely used in the construction of sponge cities. Specific application methods include ceramsite brick preparation, urban wastewater purification, urban traffic noise isolation, road rain storage, and ecological lake foundation construction. Ceramsite lightweight aggregates usually have the characteristics of low apparent density and high mechanical properties. The raw materials used for the preparation of ceramsite come from a wide variety of sources, such as: river bottom mud, various municipal sludge, industrial waste, iron tailings, etc. [0003] At present, the sintering method is the most common industrial production technology of ceramsite light aggregate. At present, the production of ceramsite is inseparable from two con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/87C04B33/135C04B33/13
CPCC04B41/87C04B41/5059C04B33/1352C04B33/131C04B41/009C04B2235/3208C04B2235/3427C04B2235/77C04B2235/96C04B41/5015C04B41/5024C04B41/4584C04B41/4539Y02P40/60
Inventor 黄涛宋东平金俊勋刘龙飞张树文周璐璐
Owner 浙江慧科环保科技有限公司
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