Light-weight heat-insulating material taking granite waste as raw material and preparation method thereof

Abstract

The invention relates to a light-weight heat-insulating material taking granite waste as a raw material and preparation method thereof. The technical scheme comprises the following steps: mixing 50-65wt% of granite waste fine powder, 10-20wt% of chunk glass powder, 1-5wt% of limestone powder, 5-13wt% of potassium chloride, 5-15wt% of sodium chloride used as raw materials; performing heat treatment at 800-1200 DEG C for 0.5-2 hours, and grounding until the particle size is less than 0.045mm; adding limestone powder, industrial sodium carbonate, white carbon black and sodium sulfate which respectively account for 0.5-3wt%, 5-10wt%, 1-5wt% and 1-10wt% of the raw materials into the ground material, and performing ball milling for 2-5 hours; and adding water which accounts for 3-10wt% of the raw materials into the ball milled material, stirring, pressing into a blank, drying, performing heat treatment at 800-1200 DEG C for 2-5 hours, naturally cooling, soaking with water, and drying at 80-110 DEG C, thus preparing the light-weight heat-insulating material taking granite waste as a raw material. The invention is simple in process, low in production cost, beneficial to comprehensive utilization of resources and friendly to environment; and the product is low in volume density, low in heat conductivity coefficient and high in compression strength.

Description

technical field [0001] The invention belongs to the technical field of lightweight thermal insulation materials. In particular, it relates to a light heat insulating material using granite waste as a raw material and a preparation method thereof. Background technique [0002] Granite is a plutonic acidic igneous rock with a high silica content, mainly composed of dark minerals such as quartz, feldspar and a small amount of mica. Due to the characteristics of not easy weathering, high hardness and wear resistance, granite is widely used in the fields of architectural decoration engineering, ground stone materials and carving materials. my country is a large stone processing country. With the increase in the demand for granite in recent years, a large amount of waste stones and waste stone powder have been produced in the stone processing process. If they are not used rationally, a large amount of waste will be discharged and accumulated. Serious pollution The environment and...

AI Technical Summary

Problems solved by technology

But = high firing temperature and high energy consumption, resulting in high density of the foamed material, which seriously affects the application effect of the product in the fields of heat insulation, sound insulation and fire prevention.

[0004] Therefore, there are some deficiencies in the comprehensive utilization of granite waste as raw materials, such as high bulk density, high thermal conductivity and low compressive strength, which cannot meet the requirements for lightweight material products in the fields of heat insulation, sound insulation, and fire prevention.