Integrated continuous production type clay dissociation-modification-drying method

Abstract

The invention discloses an integrated continuous production type clay dissociation-modification-drying method. The method comprises the following steps: fully mixing and soaking clay in a dispersion solvent; uniformly adding the pretreated clay and a modifier in a meshed co-rotating twin screw extruder, adjusting the extrusion parameter, and utilizing strong shearing force of the meshed co-rotating twin screw extruder at a meshed position to loosen and tear clay aggregate; and further drying the extruded clay to obtain micro-nano clay powder in the soft gathering state, and recycling the solvent at the same time. According to the invention, the strong shearing force of the meshed co-rotating twin screw extruder at the meshed position is utilized to loosen and tear the clay aggregate, so that the requirements for equipment are low, the process is easy to control, environmental friendliness is realized, the energy consumption and the cost are low, and large-scale continuous environmental-friendly production can be realized.

Description

technical field [0001] The invention relates to a clay dissociation method, in particular to an integrated clay dissociation-modification-drying method capable of continuous production. Background technique [0002] Clay is a natural micro-nano material, and the structural units mainly form dense aggregates through hydrogen bonds and physical forces. In recent years, from the traditional purely dry or wet dissociated clay, a new process of dissociated clay that combines dry and wet processes has gradually been developed, such as extrusion-freezing-thawing, freezing-milling and roller extrusion- Dry-wet combination technology such as high-pressure homogenization can better dissociate clay and realize the micro-nanoization of clay. However, processes such as freeze-thawing and high-pressure homogenization still have defects such as high energy consumption and secondary agglomeration, and the amount of wastewater is large, or a large amount of organic solvents are required, ma...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple, efficient and low-cost continuous production clay dissociation-modification-drying integrated method, on the basis of maintaining the original shape of the clay structural unit, to realize clay micro-nano to overcome the shortcomings of existing technologies such as high energy consumption, high cost, low efficiency, and environmental protection