Patent ID: 7591877
Filing Date: 2009-09-22
Classification: C22B

Abstract:
1. A manufacturing method of briquette for use as metal stock comprising: a molding step of forming a porous mass by compression molding a recyclable material containing a powder metal, wherein the recyclable material is at least one selected from the group consisting of cotton-like aggregates containing iron-based metal grinding dust and a grinding fluid, shot waste including powder metals and a large number of shot beads, and powder dust; an impregnating step of impregnating the just-molded porous mass with a solidification assistant by dipping the porous mass in the solidification assistant having a higher temperature than the porous mass, wherein the solidification assistant is at least one selected from the group consisting of colloidal silica, sodium silicate, aluminum phosphate and asphalt emulsion; and a drying step of drying the just-impregnated porous mass by heating the porous mass in a drying furnace.