Patent ID: 8303159
Filing Date: 2012-11-06
Classification: B01F,B28B,B28C,C04B

Abstract:
1. A method for preparing a starch pre-dispersion in a gauging water line for the production of gypsum wallboard, comprising: (a) feeding a dry starch at an adjustable rate to a venturi mixer; (b) wetting the starch with water in the venturi mixer to form a starch slurry at a concentration of from about 2% to about 10% based on the weight of the starch; (c) delivering the starch slurry from the venturi mixer to the gauging water line outside the venturi mixer to form a starch pre-dispersion in the gauging water line; and (d) delivering the starch pre-dispersion in the gauging water line to a board mixer on a production line.