Colloidal Mixing Method for Slurries

摘要

Colloidal mixing of cementitious material into a liquid such as water to form a grout slurry for pumping to a location for use includes a mixing tank and a colloidal mixing mill which grinds and pumps the mixed material with the material being repeatedly circulated between the mill and the tank. The colloidal mixing mill includes a housing defining a generally cylindrical chamber containing a rotor shaped to define a clearance of the order of 3 mm between the front and rear wall of the housing and the rotor with holes from a dished front face of the rotor to the rear face to carry the mixed materials to the clearance where a shearing action takes place to shear the particles in the mixed materials prior to exit through the outlet.

主权项

1. A method for colloidal mixing of a particulate material into a liquid to form a slurry comprising:
supplying the particulate material and the liquid to a mixing tank for mixing to form a mixed material; providing a colloidal mixing mill which grinds and pumps the mixed material; and communicating the mixed particulate material and the liquid from an outlet of the mixing tank to an inlet of the colloidal mixing mill; the colloidal mixing mill acting to pump the mixed material back to the to the mixing tank such that the material is repeatedly circulated between the colloidal mixing mill and the mixing tank; the colloidal mixing mill comprising;
a housing defining a chamber with a generally cylindrical outer wall surrounding an axis of the chamber, an inlet arranged at one end of the chamber and an outlet in the outer wall;a rotor mounted in the chamber for rotation about the axis of the chamber so as to carry the mixed materials from the inlet to the outlet so as to pump the mixed materials through the outlet;the rotor and the housing being shaped to define a clearance between a stationary wall of the housing and a rotating wall of the rotor and to carry the mixed materials to the clearance where a shearing action takes place to shear the particles in the mixed materials prior to exit through the outlet.