Method and device for extracting non-magnetic ores

US8342336B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Michael Diez · Lausanne, CH
• Imme Domke · Mannheim, DE
• Werner Hartmann · Hamburg, DE
• Hartmut Hibst · Schriesheim, DE
• Wolfgang Krieglstein · Roßtal, DE
• Alexej Michailovski · Ludwigshafen, DE
• Norbert Mronga · Dossenheim, DE
• Michael Riebensahm · Santiago, CL
• Wolfgang Schmidt
• Thomas Servay · Ludwigshafen am Rhein, DE

Key dates

• Filing date: Feb 10, 2009
• Grant date: Jan 1, 2013
• Expiry date: May 16, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P10/20
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In a device and a method for extracting non-magnetic ores from a pulp comprising non-magnetic ore particles and having a solid fraction of at least 30 mass percent, the pulp flows continuously through a reactor in the direction of flow and magnetic or magnetizable magnet particles that form ore magnetic particle agglomerations with the non-magnetic ore particles are added to said pulp. The ore magnetic particle agglomerations are moved by a magnetic field into an accumulation range of the reactor, and are then discharged out of reactor range and separated into ore and magnetic particles. In a device and a method, the separated magnetic particles are treated, in particular hydrophobized, such that during a new interaction with non-magnetic ore particles, new ore magnetic particle agglomerations are formed. Accordingly, a high yield of ores can be obtained and the mine can be operated in an economical and environmentally friendly manner.