Low-temperature solidification spray coating and construction method thereof

Abstract

The invention discloses low-temperature solidification spray coating, comprising a dry material and an inorganic binding agent, wherein the dry material is formed by stirring and mixing flint clay granules, electric ceramic granules, mullite granules, mullite fine powder, white corundum powder, activated aluminium oxide powder, nanoscale silicon micro powder, Guangxi white mud and a PT organic binding agent, wherein the inorganic binding agent is liquid sodium silicate. The scientific grain size distribution is adopted, and the materials such as the nanoscale silicon micro powder, the activated aluminium oxide powder and the inorganic binding agent which are added in a compounding way enable the spray coating to be solidified under a low temperature condition, so as to form a whole high-intensity low-temperature solidification lining body; the inorganic binding agent and the organic binding agent mutually react to improve the construction performance of the spray coating, so that the rebound is lowered to10 percent. After being used during the construction of a large sintering flue, a warm-air pipeline, a dust removal pipeline and the like in practice, the spray coating can be solidified to form the whole high-intensity lining body by self-combination under lower temperature without sintering, thus obviously reducing material consumption and achieving the aim of energy conservation and emission reduction.

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.