A kind of low temperature curing spray coating and construction method thereof

Abstract

The invention discloses a low-temperature curing spray coating, comprising dry material and inorganic binder. Aluminum powder, nano-scale silicon powder, Guangxi white mud, and PT organic binder are stirred and mixed; the inorganic binder is liquid water glass. The invention adopts scientific particle size grading, and the composite materials such as nano-scale silicon powder, activated alumina and inorganic binder are added to promote the curing of the spray coating at low temperature to form a high-strength low-temperature curing integral lining; the use of inorganic The binder and the organic binder react with each other to improve the construction performance of the spray coating and reduce the rebound rate to 10%. After being practically used in the construction of sintering large flues, hot air ducts, dust removal ducts, etc., the present invention can be solidified to form a high-strength integral lining body through self-bonding without sintering at low temperature, which significantly reduces material consumption and achieves energy saving and emission reduction. Purpose.

Description

technical field [0001] The present invention relates to refractory materials, in particular to a low-temperature curing spray coating used for hot air ducts, flue ducts, dust removal ducts, triangular areas of cement kilns, permanent linings of high-temperature tanks and repair spraying of some high-temperature linings. The present invention It also relates to a construction method of the low-temperature curing spray paint. Background technique [0002] Refractory materials are materials that serve high-temperature industries. Due to the complex and diverse specific environments of high-temperature industries, refractory materials have formed a variety of product categories during the development process. According to the construction method, there are refractory bricks, castables, ramming materials, plastics, spray coatings, etc. With the continuous development of science and technology, there are more and more construction methods of refractory materials, and spraying is ...

AI Technical Summary

Problems solved by technology

However, there are three problems with traditional spray coatings: First, due to the large amount of water added in the construction, it needs to be baked after construction to achieve the strength of use, resulting in poor material integrity. After baking, cracking and peeling often occur, which affects the service life The second is that the material has a high rebound rate, which can be as high as 30%. That is, when the material is sprayed, due to the reaction force of the object, after the material is sprayed onto the construction body, some of it will bounce back, and most of the rebounded material cannot be recycled. , resulting in a great waste of materials; the third is that the traditional spray coating needs to be baked after the construction is completed to form the surface strength, and the material must be sintered under the high temperature of the application environment to achieve good performance. Post-processing such as baking causes a large energy consumption. On the other hand, some medium and low temperature parts cannot reach the sintering temperature required by the material, which leads to loosening and falling off of the material under long-term operation and mechanical vibration.