High-strength lightweight heat insulation material taking granite waste as raw material and preparation method thereof

Abstract

The invention relates to a high-strength lightweight heat insulation material taking granite waste as a raw material and a preparation method thereof. The technical scheme is as follows: the high-strength lightweight heat insulation material taking the granite waste as the raw material is prepared by firstly taking 60-80wt% of granite waste fine powder, 13-25wt% of talcum powder, 1-5wt% of sodium chloride and 5-10wt% of industrial sodium carbonate as raw materials, uniformly mixing, performing heat treatment for 2-5h at the temperature of 800-1100 DEG C, and grinding to the particle size of less than 0.045mm so as to prepare a powder ground material; then adding 10-30wt% of alumina particles, 8-15wt% of quartz sand particles, 1-5wt% of limestone powder, 0.5-5wt% of silicon carbide powder, 1-10wt% of silicon micro-powder and 3-10wt% of water relative to the raw materials, and stirring to prepare a blank; and performing heat treatment on the blank after drying at the temperature of 600-900 DEG C for 0.5-5h, and further performing heat treatment at the temperature of 800-1200 DEG C for 0.5-5h. The high-strength lightweight heat insulation material provided by the invention has the characteristics of extensive raw material sources, simple process, low production cost and low firing temperature, is conductive to comprehensive utilization of resources and is environment-friendly; and the prepared high-strength lightweight heat insulation material has the advantages of small volume density, low heat conduction coefficient and high compressive strength.

Description

technical field [0001] The invention belongs to the technical field of high-strength and light-weight thermal insulation materials. Specifically, it relates to a high-strength light-weight thermal insulation 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. Granite has the characteristics of not easy weathering, high hardness and wear resistance, and is usually 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 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 properly utilized, their large discharge and accumulation will seriously p...

AI Technical Summary

Problems solved by technology

my country is a large stone processing country. With the increase in 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 properly utilized, their large discharge and accumulation will seriously pollute the environment and the environment. Waste of resources, not conducive to the protection of the environment and resources

[0003] At present, there are many researches on the comprehensive utilization of granite waste as raw material: for example, the patented technology of "a fireproof and sound insulation board made of granite waste" (201020227547.2), which is made of granite waste through foaming Square or wavy fire-proof and sound-insulating panels with holes, but they are only used as decorative materials, not in the technical field of thermal insulation materials; another example is the patent of "Manufacturing Method of Recycled Foaming Material Using Granite Powder as Raw Material" (201210286364.1) Technology, using granite powder as raw material, after high temperature firing at 1100~1400℃, the density is 0.3~1.2 tons / m 3 However, the high firing temperature and high energy consumption of this technology lead to the high density of the foamed material, which affects the application effect of the produced 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 in the prior art, such as high bulk density, high thermal conductivity and low compressive strength, which cannot meet the requirements of light material products in the fields of heat insulation, sound insulation, and fire prevention. requirements