Method for producing light building material by using ardealite and waste paper pulp

Abstract

The invention relates to a method for producing a light building material by using ardealite and waste paper pulp. The building material is prepared from the following raw materials: hemihydrate gypsum, waste paper pulp, water and binder; the hemihydrate gypsum is prepared by taking industrial waste phosphogypsum dihydrate as a raw material and then dehydrating; the use amount of water is 10%-200%of the mass of ardealite; the use amount of waste paper pulp is 5%-100% of the mass of ardealite; the use amount of binder is 1%-10% of the mass of mixture of ardealite and waste paper pulp. The method comprises the following steps: uniformly mixing hemihydrate gypsum, waste paper pulp, water and binder at 20-160 DEG C; mixing for 1h-12h; molding the acquired mixture in a mold, thereby acquiringthe light building material. The method has the following beneficial effects: after water is added into hemihydrate gypsum, the plastic slurry is gradually turned into hard solids and then the hard solids and plant fibers in the waste paper pulp can be fully natural degraded; a soundproof light building material with porous interior made from the ardealite and waste paper pulp has light-weight andheat-insulating effects.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste and domestic waste recycling, in particular to a method for producing light-weight building materials from phosphogypsum and waste paper pulp. Background technique [0002] At present, the roof and wall building materials used in the construction market are generally based on thermal insulation materials formed by compounding aluminum foil, plastic middle layer, and polyethylene foam cotton. The thermal insulation material described has the following disadvantages: polyethylene foam is a high-foamed polyethylene product produced by physical foaming and extrusion, and is composed of numerous single bubbles. The plastic foaming material is easy to burn and has poor flame retardancy. There are potential safety hazards in terms of fire performance; the middle layer of the insulation material is a plastic layer, although the plastic layer increases the tensile strength of the insulation ...

AI Technical Summary

Problems solved by technology

The thermal insulation material described has the following disadvantages: polyethylene foam is a high-foamed polyethylene product produced by physical foaming and extrusion, and is composed of numerous single bubbles. The plastic foaming material is easy to burn and has poor flame retardancy. There are potential safety hazards in terms of fire performance; the middle layer of the insulation material is a plastic layer, although the plastic layer increases the tensile strength of the insulation material and facilitates construction, but the plastic layer makes the flame retardancy of the insulation material poor; in addition, the existing Insulation materials have poor sound-absorbing and noise-proof effects

The annual discharge of phosphogypsum in my country has exceeded 20 million tons, but the utilization rate is less than 10%. The main reason is that the existence of impurities has an adverse effect on the performance of phosphogypsum, and the discharge of phosphogypsum occupies a large amount of land, which is harmful to soil, Serious pollution of the atmosphere and water environment, affecting the living environment of human beings