Gold tailing flame-retardant foaming thermal insulation board and preparation method thereof

Abstract

The invention relates to a gold tailing flame-retardant foaming thermal insulation board and a preparation method thereof. The board is prepared from the following raw materials: gold tailing powder, a resin material, a foaming agent, a flame retardant, a solvent, a surface modifier and a dispersing agent, the preparation method comprises the following steps: 1) grinding the gold tailings into fine powder; 2) adding a surface modifier spray into the gold tailing powder, mixing and pre-activating; (3) pre-mixing the pre-activated gold tailing powder with a resin material, a foaming agent, a flame retardant and a dispersing agent, and then adding a solvent into a mixing machine for blending and pre-swelling; 4) pumping the slurry into a mold and closing the mold; pressurizing, heating, cooling to normal temperature, and removing pressure to obtain an elastic foaming body; 5) heating the elastic foaming body for secondary foaming to obtain a secondary foaming body; and (6) heating the secondary foaming body to prepare the flame-retardant foaming thermal insulation board. According to the method, efficient utilization of the gold tailings is achieved, pollution to the environment is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to building thermal insulation materials, in particular to a flame-retardant foamed thermal insulation board for gold tailings and a preparation method thereof. Background technique [0002] The stock of gold tailings in my country is 400 million tons, and it is increasing at a rate of 25 million tons per year. The annual economic loss caused by pollution is more than 30 billion yuan. The tailings occupy a large amount of land, and some toxic waste and heavy metals Ions have caused varying degrees of impact on water resources, and the tailings composed of fine particles are piled up and there are serious safety hazards. Except a small amount is used to extract and recover valuable components, its secondary emissions are still very considerable. Realizing the reduction and harmlessness of gold tailings until they are fully resourced is an important way to fundamentally build a green mine, manage the mine environment, and take the r...

AI Technical Summary

Problems solved by technology

At present, a large number of resin organic polymer foam materials such as polyurethane are used in the market. Most of these materials are formed by extrusion foaming or injection foaming. Due to the characteristics of the molding process and the hydrophobicity of the resin material, the main body of the foam material is made of resin. The material is the main material, and the amount of inorganic substances is generally below 20%, or even lower. Therefore, although the thermal insulation foam board prepared by this kind of material has light specific gravity and excellent thermal insulation performance, its flame retardancy is relatively poor, and it is easy to cause fire. The disadvantages seriously endanger people's personal and property safety; at the same time, the high content of organic components causes poor wettability between the board and inorganic cement mortar, resulting in poor construction sagging, and poor integration with the wall is also likely to cause safety hazards. Therefore, the application of this type of thermal insulation board in the field of industrial thermal insulation and building thermal insulation is greatly limited, and it is of great application significance to prepare foamed thermal insulation materials with good comprehensive performance.