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Production process of ultra-light high-temperature calcium silicate thermal insulation products

A production process, calcium silicate technology, applied in the direction of silicate, alkaline earth metal silicate, etc., can solve problems such as high density, large drying shrinkage, and use temperature below 1000°C

Active Publication Date: 2019-01-11
SHENGZHOU QIUSHI ENERGY SAVING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our country has been able to produce density of 170 ~ 260kg / m 3 xonotlite type calcium silicate insulation material with a density of 135kg / m 3 According to reports, the following ultra-light products are still in trial production. The commonly used production process is to mix calcium raw materials (lime) and silicon raw materials (quartz sand) in a certain proportion at one time, and then dynamically stir and react under high temperature and pressure to produce slurry It is also possible to add 40% to 60% of the lime to make a preliminary reaction, and then add the rest of the lime at one time to react the slurry. The high-temperature calcium silicate insulation products made of such slurry often shrink when dried. , high density, the use temperature can not reach 1000 ℃

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The production process of ultra-light high-temperature calcium silicate thermal insulation products. The raw materials include siliceous raw materials, lime and water. According to the weight percentage of raw materials, siliceous raw materials account for 50kg, lime accounts for 50kg, and water accounts for 900kg; the production process steps are: 1. The siliceous raw material is activated by ball milling; 2. Mix the activated siliceous raw material and 5kg of lime into water, mix and stir evenly in the dynamic reaction kettle, and at the same time, raise the temperature of the reaction kettle to 210°C, and the pressure rises To 2.0MPa for heat preservation and pressure; 3. Gradually and continuously add the remaining lime to the dynamic reactor within 2 hours for mixing and stirring, and at the same time to obtain a slurry after high temperature reaction; 4. Naturally cool down the dynamic reactor to normal pressure Finally, the slurry is released and pressed to form a...

Embodiment 2

[0013] The production process of ultra-light high-temperature calcium silicate thermal insulation products. The raw materials include siliceous raw materials, lime and water. According to the weight percentage of raw materials, siliceous raw materials account for 60kg, lime accounts for 60kg, and water accounts for 880kg; the production process steps are: 1. The silicon-calcium raw material is activated by ball milling; 2. Mix the activated siliceous raw material and 15kg of lime into water, and mix and stir evenly in the dynamic reaction kettle. To 2.5MPa for heat preservation and pressure; 3. Gradually and continuously add the remaining lime to the dynamic reactor within 3 hours for mixing and stirring, and at the same time to obtain a slurry after high temperature reaction; 4. Naturally cool down the dynamic reactor to normal pressure Finally, the slurry is poured out and pressed to form a wet embryo; 5. The wet embryo is dried to obtain a finished product, which can be pack...

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Abstract

The invention discloses a production process of an ultralight high-temperature calcium silicate insulation product. The product comprises the following raw materials by weight percent: 2%-10% of silica raw materials, 2%-9% of lime and 88%-92% of water. The production process comprises the following steps: 1, activating the silica raw materials; 2, adding the activated silica raw materials and 0.1%-30% of the lime into the water, uniformly mixing in a dynamic reaction kettle, heating the reaction kettle to 150-230 DEG C, increasing the pressure intensity to 1.0-2.5MPa, and preserving heat and pressure; 3, gradually and continuously adding the rest lime into the dynamic reaction kettle, mixing, and reacting at a high temperature to obtain slurry; 4, naturally cooling the dynamic reaction kettle until the pressure is reduced to atmospheric pressure, discharging the slurry and performing pressure forming to obtain a wet blank; and 5, drying the wet blank to obtain the finished product, packaging and warehousing. According to the product prepared by adopting the process, the density is less than 135kg / m<3>, the drying shrinkage rate is small, the performance is stable at high temperature of 1,000 DEG C, and the blank in China is filled.

Description

technical field [0001] The invention relates to a production process of a high-temperature calcium silicate thermal insulation product, in particular to a production process of an ultra-light high-temperature calcium silicate thermal insulation product. Background technique [0002] High-temperature calcium silicate thermal insulation products are an important type of thermal insulation material, and their service temperature can reach 1000°C, and can be divided into 220kg / m2 according to the product density 3 Ordinary type and less than 135kg / m 3 Two types of ultra-light. Due to the unique and excellent performance of ultra-light, it has been widely concerned, and many scholars at home and abroad have conducted in-depth research on it, so that its manufacturing technology has been developed to varying degrees. [0003] my country is one of the most active countries in the world in the research of high-temperature calcium silicate thermal insulation materials. Our country...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/24
Inventor 裘喜淼
Owner SHENGZHOU QIUSHI ENERGY SAVING MATERIALS CO LTD