The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1977
Filed:
Sep. 24, 1973
Lars Alrik Anttila, Malmberget, SW;
Per Anders Fahlstrom, Akers Runo, SW;
Ernst Olov Fagremo, Boliden, SW;
Verner Herbert Hedman, Boliden, SW;
Sven Goran Aberg, Boliden, SW;
Boliden Aktiebolag, Stockholm, SW;
Abstract
A flotation concentrate in the form of a water suspension is treated with a reagent that nullifies the effect of previously used collectors. The suspension is filtered, and subjected to a mechanochemical treatment that includes chemical conditioning of the mineral surfaces and producing fresh surfaces by grinding with grinding bodies which additionally provide ions that promote selectivity. Grinding efficiency is controlled by the amount of material fed to the mill. The quantity of pulp flowing to the filter is determined and the supply of collector reagent to the filter and the rotary speed of the mill are regulated in response to the flow values.