Howard W Hilshorst

US Patent:

8545594, Oct 1, 2013

Filed:

Aug 1, 2011

Appl. No.:

13/195430

Inventors:

Howard W. Hilshorst - Britt MN, US
Gregory D. Lindahl - Hibbing MN, US
James A. Hecimovich - Mountain Iron MN, US

Assignee:

Superior Mineral Resources LLC - Hibbing MN

International Classification:

C22B 1/00
B03C 1/30

US Classification:

75 1067, 75749, 209 39, 241 2414, 241 2425

Abstract:

A method of enriching the iron content of low grade iron ore bearing materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low grade iron ore bearing materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron bearing materials into a high grade ore stock.

US Patent:

20130032004, Feb 7, 2013

Filed:

Jul 27, 2012

Appl. No.:

13/560143

Inventors:

Howard W. Hilshorst - Britt MN, US
Gregory D. Lindahl - Hibbing MN, US
James A. Hecimovich - Mountain Iron MN, US

Assignee:

Superior Mineral Resources LLC - Hibbing MN

International Classification:

C22B 1/00

US Classification:

75 1067

Abstract:

A method of enriching the iron content of low-grade iron-bearing ore materials has been developed which produces a high iron ore concentrate suitable for processing into pig iron and steel. The process includes reducing the low-grade iron-bearing ore materials to a fine particulate form and treating a water slurry of this material by applying a combination of ultrasonic treatments in a plurality of high and low intensity magnetic separation operations to remove interfering materials and concentrate magnetic and paramagnetic iron-bearing materials into a high-grade ore stock.