copper ore acid recovery

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US3793429A Nitric acid process for recovering metal values

a sulfide ore material containing sulfide iron and values of one or more metals in the group consisting of copper nickel cobalt and silver is subjected to leaching with an aqueous solution of nitric acid under conditions controlled to insure the formation of easily filterable hydrogen jarosite 3fe2o3.so3.4so3.9h3o or a similar butless desirable iron compound 2fe2o3.so3.5h2o which in

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Recovery of Copper by Solution Mining Methods

Recovery of Copper by Solution Mining Methods David F. Briggs Economic Geologist 3514 West Blacksill Drive Tucson Arizona 85741 Phone 5207444195 Cell 5207843954 Introduction Solution mining is a mining practice that employs solutions i.e. water or dilute acid to recover a desired commodity from an ore deposit where it stands without

Acid Leaching Copper Ore Treatment Method

PREPARATION OF THE COPPER ORE. This study is limited in general to percolation leaching as it is the most widely used method to give proper contact of solvent with the ore to effect extraction of the copper. One of the important factors in percolation leaching is the size reduction necessary for copper recovery within reasonable time limits. It

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PDF A Review of the Flotation of Copper Minerals

Oxidic ore can be concentrated using flotation or if it has a low acid demand it may be economic to acid heap leach the stockpile. The recovery of these copper minerals by flotation or

Heap leaching Wikipedia

This method is an acid heap leaching method like that of the copper method in that it utilises sulfuric acid instead of cyanide solution to dissolve the target minerals from crushed ore. The amount of sulfuric acid required is much higher than for copper ores as high as 1000 kg of acid per tonne of ore but 500 kg is more common.

Acid leaching of oxidesulfide copper ore prior the flotation

and the copper recovery is about 35 during the mill running process. Sun at al. 14 performed the copper leaching from low grade copper oxide ore by sulphuric acid and they have obtained leaching percent of copper over 90. Compared with the copper leaching efficiency of about 35 in the mill running technology the

Heap Leaching Oxide and Sulfide Copper Ores

The copper recoveries on minus3mesh ores 1 and 2 were 75 and 89. 5 percent respectively at acid consumptions of less than 4. 50 pounds of sulfuric acid per pound of copper dissolved. The ultimate economic recoveries obtained in largescale field tests on minus6inch size ores 1 and 2 were 55 and 45 percent at acid consumptions of 6.5 and

LEACHING OF LOWGRADE COPPER ORES: A STUDY FOR KRAKU

Oxide copper ore mixed oxidesulphide ores and lowgrade copper sulphide ore which for economic reasons cannot be enriched by flotation may be processed by leaching methods. Agents for leaching copper can be acid base or salt solutions. Of all of these agents sulphuric acid has been given the

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