Method for producing plastic filling master batch through papermaking waste white mud

Abstract

The invention provides a method for producing a plastic filling master batch through a papermaking waste white mud. The method comprises the following steps of: transferring papermaking waste white mud with greater than 85% of CaCo3 content and 1 to 5% of residual NaOH into a size mixing barrel to mix into the size with 10 to 30% of solid content; heating the size to reach 60 to 80 DEG C; agitating at a high speed, and synchronously adding melting stearic acid amount to 0.5 to 1.5% of the solid content to react the stearic acid and the NaOH residual in the white mud to obtain sodium stearate to be absorbed on the surface of the CaCO3; and dewatering, drying, crushing, sieving, and preparing into active calcium carbonate; and then transferring the active calcium carbonate into a high-speed mixture, and adding 5 to 10% of polyethylene and 5 to 10% of polyethylene wax based on the weight of the active calcium carbonate to be mixed at the high speed to obtain a mud-block shaped material; adjusting the running speed of the high-speed mixture into a slow state; opening a material outlet valve to discharge the material, and cooling, crushing, and transferring into a double screw extrusion machine to be extruded and pelletized so as to obtain the plastic filling master batch as required. The method can reduce the pollution to the environment, and also can change harmful substance to useful substance.

Description

technical field [0001] The invention relates to a method for producing plastic filling masterbatch by using white mud, which is waste papermaking material, and belongs to the technical field of plastic filling modification. Background technique [0002] Papermaking waste white mud is a by-product of the alkali recovery process in the pulp production process, and its main component is CaCO3. Because its by-product CaCO3 contains 1 to 5% NaOH residue, and NaOH is a strong alkali, which seriously affects the use of its waste. It is generally treated as waste deep burial. A large amount of deep burial of waste seriously pollutes the land. Plants cannot grow, which will cause serious damage to the environment in the long run. Contents of the invention [0003] The invention discloses a method for producing plastic filling masterbatch by using white mud which is waste material from papermaking, which can not only utilize the waste, but also effectively overcome the environmenta...

AI Technical Summary

Problems solved by technology

Because its by-product CaCO3 contains 1 to 5% NaOH residue, and NaOH is a strong alkali, which seriously affects the use of its waste. It is generally treated as waste deep burial. A large amount of deep burial of waste seriously pollutes the land. Plants cannot grow, which will cause serious damage to the environment in the long run