Desulfurization gypsum industrial waste slag molded external light stone and method

Abstract

Desulfurized gypsum industrial waste slag molding external light stone, by weight percentage, desulfurized gypsum 40.0% ~ 50.0%, magnesium oxide 29.85% ~ 40.25%, magnesium sulfate 10.0% ~ 15.0%, citric acid 0.15% ~ 0.25%, water reducing agent 0.10%-0.25%, polymer powder, 0.50%-0.80%, fiber 2.50%-3.20%, pigment 0.5%-1.0%; the magnesium oxide is selected from the industrial grade purity with calcination temperature of 400 degrees and mesh number of 400 It is more than 90% white powder. It improves the water resistance of magnesium oxysulfate cement and the toughness and strength of artificial stone. It contains a large number of micropores, which greatly reduces the density of artificial stone and realizes the multi-functionality of artificial stone such as thermal insulation, humidity control and sound insulation. Realize the recycling of industrial waste, the safe and reliable treatment of industrial waste desulfurization gypsum, and the utilization rate is as high as 40%.

Description

technical field [0001] The invention belongs to IPC classification C04B building materials similar to artificial stones, and relates to a molding stone preparation technology, in particular to molding and hanging lightweight stones and methods using desulfurized gypsum industrial waste residue. Background technique [0002] In modern architectural decoration projects, represented by public buildings, the exterior walls of buildings tend to be decorated with external stone materials. However, some inherent defects of natural stone, such as large specific weight and poor processability, make its application cost in external decoration projects more and more expensive, and natural stone resources are gradually scarce, which also makes related industries and consumption unsustainable. Correspondingly, artificial stones continue to emerge and become a substitute for natural stones. [0003] After searching the documents of the prior art, it is found that relevant patent document...

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Problems solved by technology

[0004] Chinese patent application CN101007727A discloses an external cement-based artificial molded stone material. A molded stone material is prepared by casting and molding with white cement, limestone crushed material, zeolite powder, resin powder and pigments. It has good texture and durability, but Due to the use of cement and gravel as the main materials, its specific gravity is relatively large and its function is single

[0009] However, from the point of view of manufacturing raw material technology and cost, these existing artificial stones are expensive and do not have a competitive advantage in the market