Process for beneficiating oxide ores

In a process for the beneficiation of a metal oxide ore wherein the ore is treated with an iron carbonyl compound under conditions which cause the iron carbonyl compound to react substantially at the surface of the metal oxide particles to the substantial exclusion of the gangue particles so as to alter the surface characteristics of the metal values thereby causing a selective enhancement of the magnetic susceptibility of one or more metal oxide values of the ore to the exclusion of the gangue in order to permit a physical separation between the values and the gangue, the improvement comprising:

• treating the ore with heat prior to its treatment with the iron carbonyl.

In a process for the beneficiation of a metal oxide ore wherein the ore in a specific system is treated with from about 0.1 to about 100 kilograms of a metal containing compound per metric ton of ore at a temperature within a range of 125.degree. C. less than the general decomposition temperature of the metal containing compound in a specific system for the ore being treated for a period of time from about 0.05 to about 4 hours to cause the metal containing compound to react substantially at the surface of the metal oxide particles to the substantial exclusion of the gangue particles so as to alter the surface characteristics of the metal values thereby causing a selective enchancement of the magnetic susceptibility of one ore more metal oxide values contained in the ore to the exclusion of the gangue in order to permit a physical separation, the improvement comprising:

• heat treatment of the ore prior to treating it with the metal containing compound.

In a process for the beneficiation of a metal oxide ore selected from the group consisting of carnotite, apatite, scheelite, cuprite, cassiterite, bauxite, and hematite wherein the ore in a specific system is treated with from about 2 to about 20 kilograms of an iron containing compound per metric ton of ore at a temperature within a range of 125.degree. C. less than the general decomposition temperature of the iron containing compound in a specific system for the ore being treated to cause the iron containing compound to react substantially at the surface of the metal oxide particles to the substantial exclusion of the gangue particles so as to alter the surface characteristics of the metal values thereby causing a selective enhancement of the magnetic susceptibility of one ore more metal oxide values contained in the ore to the exclusion of the gangue in orddr to permit their magnetic separation, the improvement comprising:

• heating the ore to a temperature of from about 125.degree. C. to about 500.degree. C. for a time period of from about 0.25 to about 1 hour prior to its treatment with the iron containing compound.

In a process for the beneficiation of a metal oxide ore wherein the ore for the specific system is treated with from about 0.1 to about 100 kilograms of an iron containing compound selected from the group consisting of ferrous chloride, ferric chloride, ferrocene, ferrocene derivatives, ferric acetylacetonate and ferric acetylacetonate derivatives per metric ton of ore at a temperature within a range of 125.degree. C. less than the general decomposition temperature of the metal containing compound in a specific system for the ore being treated for a period of time from about 0.05 to about 4 hours to cause the iron containing compound to react substantially at the surface of the metal oxide particles to the substantial exclusion of the gangue particles so as to alter the surface characteristics of the metal values thereby causing a selective enhancement of the magnetic susceptibility of one or more metal oxide values contained in the ore to the exclusion of the gangue in order to permit a physical separation between the values and gangue, the improvement comprising:

• heat treatment of the ore prior to treating it with the iron containing compound.