Cold-resistant insulation building gypsum powder and preparation method thereof

Abstract

The invention discloses a cold-resistant insulation building gypsum powder. Aluminum nano-powder is added into raw materials, and water is added into the materials and all the materials are blended to generate hydrogen, and the hydrogen is released to form a porous structure. In addition, phosphogypsum is creatively roasted, crushed and air-blasted to boiling state, and a vaporous hydrochloric acid solution is sprayed. After improved acid pickling technology for modification, contents of other impurities are reduced, content of CaSO4.2H2O is increased, and cost of traditional acid pickling is reduced. The economical benefit is remarkable. By adding the product into natural gypsum, with compatibility of other effective compound additives and through grinding, lap joint between crystals of a gypsum hardened specimen is denser, and gap between crystals is correspondingly reduced. The prepared insulation building gypsum powder has cold resistance, high strength, large porosity and remarkable insulation effect. Grain size gradation, adhesive property, flowing property, setting time and the like of the insulation building gypsum powder are improved. The whole preparation process is simple. Industrial wastes are fully utilized. Thus, the environment is protected, and natural gypsum resources are saved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cold-resistant and heat-retaining building gypsum powder and a preparation method thereof. Background technique [0002] In recent years, fire accidents in the external wall insulation system of organic thermal insulation materials have occurred frequently, which has brought great losses to people's lives and property. It is imminent to develop low-carbon and non-combustible thermal insulation materials. Building gypsum has the excellent characteristics of light weight, fire prevention and heat preservation. At present, the most commonly used gypsum is natural gypsum. However, the consumption of chemical gypsum is growing rapidly. Phosphogypsum is the most researched chemical gypsum. Because phosphogypsum contains a certain amount of impurities, it has a great impact on its comprehensive utilization. In recent years, the emission of phosphogypsum in my country has in...

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Problems solved by technology

However, the cost of pickling in this article is too high, and it has the disadvantages of high heat consumption and long processing time. The obtained building gypsum powder has low comprehensive performance and does not have the functions of heat preservation and noise reduction. It is necessary to modify the existing production process and ingredients. Improve it to produce building gypsum powder with high efficiency, low cost, waterproof, high strength and excellent thermal insulation effect