Environmental protection based red mud combination modification synergism fire-retardant polyethylene

Abstract

The invention relates to an environmental protection based red mud combination modification synergism fire-retardant polyethylene, and belongs to the technical field of compressive utilization and fire-retardant plastics. The fire-retardant polyethylene is suitable for fire safety protection in important public places in the fields of electric products, building materials and transportation. The fire-retardant polyethylene consists of the following components in percentage by weight: 30 to 35 percent of polyethylene, 34 to 39 percent of red mud, 6 to 13 percent of red phosphorus, 5 to 17 percent of zinc borate, 3 to 8 percent of ethylene-vinyl acetate copolymer, 2 to 7 percent of grafted polyethylene, and 2 to 8 percent of silicone oil. The preparation process comprises the following steps of: grinding and drying the red mud; blending the ground red mud with other raw materials according to the blending ratio; mixing the mixture with polyethylene resin by fully stirring at a high speed; fusing, co-mixing and processing the mixture; and preparing a sample. The processing conditions comprise that: the roll temperature of a double-roller mixing mill is between 140 and 150 DEG C; and the forming temperature of the flat vulcanizing machine sample is between 120 and 130 DEG C, the heating time is between 4 and 8 minutes, and the pressure is between 10 and 20MPa. The fire-retardant system meets the requirements of industrial application on mechanical property, and simultaneously has comprehensive properties such as good fire-retardant effect, low cost, environmental protection and the like; moreover, the application field of the red mud is widened, and the red mud product with high added value is prepared.

Description

technical field [0001] The invention relates to the technical fields of comprehensive utilization of red mud, environmental protection and flame-retardant plastics. The red mud compound modified synergistic flame-retardant polyethylene composite material provided by the invention is especially suitable for fire safety protection of important public places in the fields of electronic appliances, building materials and transportation. Background technique [0002] Red mud is formed during the process of refining alumina from bauxite, and its main component is SiO 2 , CaO, Al 2 o 3 , Fe 2 o 3 , and the content of each component varies with the origin of bauxite and the production process of alumina. [0003] Red mud is the largest industrial waste produced in the alumina production process, which has brought serious burdens to society and the environment. As the fourth largest producer of alumina in the world, my country discharges millions of tons of red mud every year. ...

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