Method for separating a machining suspension into fractions

US6821437B1 · kind B1 · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Peter Eisner · Freising, DE
• Andreas Malberg · Birkenfeld, DE
• Michael Menner · Jena, DE
• Axel Borcherding · Munich, DE

Key dates

• Filing date: Jul 18, 2002
• Grant date: Nov 23, 2004
• Expiry date: Oct 10, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P70/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The present invention relates to a method of separating a machining suspension into fractions including abrasive grains and attrition material, such as a suspension produced in the course of the mechanical machining of silicon, quartz or ceramic material, from a cutting fluid in which abrasive grains and the attrition material are dispersed that originates from the machined material and from the machining equipment. In the method, the suspension is separated by means of wet classification, with the liquid used for the sizing process being selected in such a way that it can be mixed with the used cutting fluid and with the mixture so formed, which contains the attrition material originating from the machined material in particular, forming a stable suspension.