Automatic Iron Ore Assayer

Author:  Halsey, H. P.
Source:  US Patent 3,433,057
Doc ID:  1969000
Year of Publication:  1969
Abstract:  
Apparatus for continuously and automatically computing the amount of magnetic iron relative to the amount of ore in a slurry of ore and water. The ore itself is a mixture of gangue and magnetite, with the magnetite containing a known percentage of magnetic iron. The present system continuously measures two characteristics of the constantly changing slurry, the specific gravity of the slurry and the amount of magnetite in the slurry. These two characteristics are represented as usable signals, and apparatus is provided to combine these signals with various constants, including a constant representative of the specific gravity of the gangue, to develop the desired information.