Expanded perlite insulation board and preparation method thereof

Abstract

The invention discloses an expanded perlite insulation board and a preparation method thereof.The preparation process includes the steps that perlite ore sand serves as a raw material and is heated and expanded through an electric heating shaft furnace to form closed expanded perlite, the closed expanded perlite is conveyed to a mixing section through wind power, 15-20 wt% of mixed liquid is addedfor uniform mixing, and then the mixture is quantitatively conveyed into a mold to be pressed into the expanded perlite insulation board. The preparation method of the expanded perlite insulation board belongs to a short process, perlite ore sand electric heating puffing, hot mixing (the residual temperature of expanded perlite is 80-90 DEG C), hot pressing into a board and curing (60-80 DEG C) are carried out, and compared with a traditional board cold pressing process taking expanded perlite as a raw material, the finished product quality is excellent; the preparation process is high in energy utilization rate; the process is continuous, compact and closed, and flying dust pollution is avoided; the heat conductivity coefficient is as low as 0.05-0.06 W / (m*K), the compressive strength reaches 0.5-1.0 MPa, the heat preservation and insulation performance is good, and the comprehensive cost performance is high. An outer wall external thermal insulation system composed of the expanded perlite thermal insulation board is convenient to construct, stable in quality, energy-saving, fireproof, long in service life and wide in application prospect.

Description

technical field [0001] The invention relates to a building material, more specifically to an expanded perlite insulation board and a short-process preparation method thereof. Background technique [0002] The use of thermal insulation boards in the construction industry is an important method to save energy and improve energy utilization. At present, external wall insulation technology is a necessary and key measure for energy conservation of building envelopes. Expanded perlite insulation board has a good development prospect because of its light weight and low thermal conductivity, and it can be prepared into larger boards. However, the preparation process of expanded perlite insulation boards currently on the market is complicated and the cost is too high, which limits its development and application. [0003] For example, the publication number CN107082621A is a preparation method of a new type of building energy-saving thermal insulation material, first mixing expanded...

AI Technical Summary

Problems solved by technology

Among them, the production and transportation of expanded perlite raw materials produce dust pollution, and the plate preparation is completed in multiple steps. The high quality of the prepared plates is not conducive to large-scale use.

[0004] For example, the previous work patent No. ZL201210234157.1 inorganic lightweight aggregate fire-proof thermal insulation board and its preparation method needs to be cured at 150-220°C for 5-12 hours at a low temperature after molding, and the preparation of the insulation board takes a long time. Many, comprehensive cost performance is not high

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