Process for preparing inorganic nanometer silicon-based calcium silicate heat insulation product

Abstract

The invention discloses a process for preparing an inorganic nanometer silicon-based calcium silicate heat insulation product. The process comprises the following steps: a, preparation before manufacturing; b, grinding and mixing; c, hydration reaction; and d, forming. According to the invention, a nanoscale inorganic siliceous material, namely nanometer silicon is used as a reaction base materialand a calcium raw material are mixed and burdened according to a certain ratio; a certain proportion of aerogel is properly added into ingredients to serve as an additive; and the hydration reactionis conducted under high temperature and high pressure; and therefore, the calcium silicate heat insulation product with low density, small heat conductivity coefficient, corrosion resistance, high strength and stable high-temperature resistance is prepared. According to the calcium silicate heat insulation product, the requirement for long-term stable use of the product in heat insulation of a heat supply network pipeline can be met; the nanometer silicon has the characteristics of high purity, small particle size, uniform distribution, large surface area, high surface activity and low apparent density; and the prepared calcium silicate heat insulation product has the characteristic of low density due to the characteristic of low density of the nanometer silicon, and the preparation efficiency of the calcium silicate heat insulation product is improved due to the characteristic of high surface activity of the nanometer silicon.

Description

technical field [0001] The invention belongs to the technical field of calcium silicate thermal insulation materials, and in particular relates to a process method of an inorganic nanometer silicon-based calcium silicate thermal insulation product. Background technique [0002] Existing thermal insulation products of Rewang are usually fiber materials such as rock wool and aluminum silicate, which block heat loss and reduce energy consumption through a large number of gaps between fibers. [0003] In actual use, most of the thermal insulation products of the thermal network have the problems of easy damage, short service life and poor thermal insulation effect, resulting in a serious decline in the thermal insulation effect of the thermal network, and the increase in pipe loss and temperature drop per kilometer has affected the operation of the entire thermal network. economy. Contents of the invention [0004] The purpose of the present invention is to solve the above-me...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned technical problems existing in the prior art, and to provide a process method for an inorganic nano-silicon-based calcium silicate thermal insulation product. Mix ingredients in a certain proportion to replace the original siliceous raw materials such as diatomite, bentonite, and quartz sand with low purity and poor activity. Calcium raw materials use quicklime, and a certain proportion of airgel is appropriately added as an additive in the ingredients. The hydration reaction is carried out under low temperature, so as to prepare calcium silicate insulation products with low density, small thermal conductivity, corrosion resistance, high strength and stable high temperature resistance, which can meet the long-term and stable use in heat network pipe insulation. Nano silicon has high purity , small particle size, uniform distribution, large surface area, high surface activity, low bulk density, and the low density of nano-silicon makes the prepared calcium silicate insulation products have low density. At the same time, nano-silicon has high The characteristics of surface activity accelerate the preparation efficiency of calcium silicate insulation products

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