Patent · US Expired

Method and device for two-stage classification of granular material

US6508420B2 · kind B2 · utility

0Cited by

2References

12Claims

0Family size

Assignee

KHD Humboldt Wedag GmbH · DE

Inventors

Siegfried Strasser · Much, DE
Albert Sussegger · Eitorf, DE

Key dates

Filing date	Mar 2, 2001
Grant date	Jan 21, 2003
Priority date	—
Expiry date	Mar 2, 2021

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB02C23/14
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

Two-stage classification of a granular material, in particular a cement grinding feed, is accomplished in two classifiers connected in series in such a way that the separative behavior or the separative action and thus the particle-size distribution of the undersized or finished material coming from the second classifier can be modified with simple resources. Part or all of the oversized material of the second classifier is recycled to the second classifier.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.