Production method of red mud complexed polyvinyl chloride colorized rigid plastic

Abstract

The invention relates to a production method of modified red mud complexed polyvinyl chloride colorized rigid plastic. The method is characterized in that: graded red mud with a specification of -800 meshes is modified by using a titanate coupling agent; 35-45 parts of the modified red mud, 100 parts of polyvinyl chloride, 5-10 parts of an impact modifier, 3-5 parts of a stabilizing agent, and 0.2-0.8 parts of a lubricating agent are subject to high-speed mixing, melt extrusion and filming, such that the colorized rigid plastic is obtained. According to the invention, red mud is subject to a modification treatment, such that the compatibility of the red mud and polyvinyl chloride is substantially improved. When the plastic is subject to the filming treatment, a monotonic brownish red color of the red mud complexed polyvinyl chloride substrate plastic is changed, a woody pattern is provided, the color is diversified, and the plastic is provided with a good appearance.

Description

technical field [0001] The invention relates to a production method of compounding polyvinyl chloride colored rigid plastics with red mud. Background technique [0002] Red mud is the solid waste generated during the alkaline production of alumina from bauxite. The discharge, composition and characteristics of red mud vary with the type of bauxite and the change of production process. In the Bayer process, 1-1.5t of red mud is discharged for every 1t of alumina produced. For sintering and combined processes, 1.5 - 2.5 tons of red mud are discharged for every 1 ton of alumina produced. According to statistics, the total annual production of red mud in the world reaches more than 70 million tons, of which China produces more than 30 million tons per year. Although extensive research has been done on the comprehensive utilization technology of red mud, the utilization rate of red mud is still very low, and the comprehensive utilization rate of red mud in my country is only 4...

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Problems solved by technology

Chinese invention patent CN 1369515A discloses a color treatment method for red mud plastic profiles. In this method, the red mud plastic profiles are soaked in 75°C-100°C high-temperature water for 4-160 minutes, or heated with 75°C-100°C high-temperature gas 4-160 minutes, then take it out from high-temperature water or high-temperature gas, and after natural cooling treatment, the surface color of the red mud plastic profile changes from dark red to silver gray. This method is simple to implement, but it cannot solve the problem of monotonous color , and the color of red mud plastic is iron oxide in red mud, and the high temperature treatment at 75°C-100°C cannot change its structure, so it is difficult to ensure the stability of red mud plastic silver gray

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