Process for the preparation of granulated abrasives from fused or sintered refractory inorganic hard substances having a high grain toughness

US4049397A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Gerd-Edzard Bockstiegel
• Manfred Neidhardt
• Gerhard Rehfeld · Aachen, DE
• Werner Umlauf

Key dates

• Filing date: Apr 16, 1975
• Grant date: Sep 20, 1977
• Expiry date: Apr 16, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K3/1409
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for the manufacture of granular abrasives having improved grain toughness from refractory, inorganic hard substances which comprises crushing a lump or block of said refractory inorganic substance, thereafter subjecting the resultant grains to a grind sorting process such that substantially only the porous grains, grains containing flaws or coarsely crystalline grains are comminuted and separating them in the ground condition from the balance of the material.