process of refining copper o ide acid leach

Copper Mining and Extraction: Oxide Ores

extraction process employs a strong acid to strip the copper from Crushed ore in the leach pad. The pregnant leach pond is in the distance. The crushed ore rests on a leak-proof membrane to protect the underlying ground and prevent the acid and copper ions polluting the local water table. The pregnant leach pond contains copper

Selective leaching process for the recovery of copper and ...

A selective acid leaching process was then used to recover the copper content of the residue after filtration. In the second stage, an additional 1 N of sulphuric acid was added to the suspension in the selective leaching process, and the pH value was controlled at 1.5-2.0. The reagent sodium hydroxide (2 N) was used as leachate at a pH greater ...

COPPER-REFINING PROCESS - FRANK D. CHEW

My process comprises a combination of steps of leaching the copper-bearing materials with dilute sulfuric acid to produce a dilute pregnant solution of copper and impurity metal sulfates; contacting the pregnant solution with ferrous scrap in a cementation zone to produce a raw cement copper product; separating portions of the ferrous ...

Acid leaching of oxide–sulfide copper ore prior the ...

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 cop-per over 90%. Compared with the copper leaching effi-ciency of about 35% in the mill running technology the leaching process has achieved a better economic result.

US3630722A - Copper-refining process - Google Patents

In an integrated process, copper-bearing materials are leached with dilute sulfuric acid and the dilute pregnant leach solution is reacted with ferrous scrap to produce cement copper precipitate containing copper metal, ferrous impurities and normally refractory metal impurities. The raw cement copper is preliminarily treated to separate portions of the ferrous impurities and is then melted ...

Recent Developments in Copper Hydrometallurgy

Leaching (Oxide) (Chalcocite) Solution Extraction Milling (Chalcocite) (Chalcopyrite) Smelting Electro-Refining Electro-Winning Acid Flotation Primary Crushing Stockpile Leaching (Oxide) (Chalcocite) Sec/Tert Crushing Customers Technology development efforts under way to reduce energy consumption in electrowinning by 15-35% Technology not yet ...

Copper Mining and Extraction: Oxide Ores

The smelter for sulfide ores produces sulfur dioxide gas. This is scrubbed from the flue gases to make sulfuric acid for leaching copper from oxide ores. Scrubbing sulfur dioxide also protects the environment. A by-product of the smelting and converting furnaces is sulfuric acid. In what looks like a lucky coincidence, sulfuric acid is needed ...

Pressure Leaching of Copper Concentrates

8 October 25th, 2004 Drivers for Concentrate Leaching Cost effective alternative to conventional smelting & refining Capital cost versus greenfield smelter/refinery projects $1,000-2,000 versus $3,000-6,000/annual tonne Ability to utilize existing SX capacity ($300-400/annual mt) Ability to utilize spare EW capacity ($500-600/annual mt) Ability to utilize existing infrastructure

Acid Leaching - Copper Ore Treatment Method

The flowsheet discussed in this study is for treatment of 100 tons per day oxide-sulfide copper ore by the leaching process using sulfuric acid-ferric sulfate solvent. This flowsheet would also be suitable for a larger tonnage by proper sizing of the various units of equipment. The flowsheet contemplates a six to seven day leach …

Selective Copper Recovery by Acid Leaching from Printed ...

95% copper from the leach liquor [12]. Another leaching process used a spent acid etching solution with the assistance of ultrasound at 300 W and further adjustment of pH by lime to 2.5, obtaining a high Cu leaching efficiency of 93.76% and a noticeably low Fe extraction of 2.07% [9]. Sulfuric leaching

LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY …

Oxide copper ore, mixed oxide-sulphide ores and low-grade 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

A STUDY OF LEACHING OF COPPER OXIDE ORE BY SULPHURIC ACID

A required amount of 75 g/L. sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as leaching time from 0.25 – 4 ...

Copper Mining and Processing: Processing Copper Ores ...

Copper processing is a complicated process that begins with mining of the ore (less than 1% copper) and ends with sheets of 99.99% pure copper called cathodes, which will ultimately be made into products for everyday use.The most common types of ore, copper oxide and copper sulfide, undergo two different processes, hydrometallurgy and pyrometallurgy, respectively, due to the different ...

Leaching of copper oxide with different acid solutions ...

In this study, the dissolution of CuO in HCl, H 2 SO 4, HNO 3 and citric acid solutions was investigated in a batch reactor employing parameters expected to affect the dissolution rate of copper such as stirring speed, temperature and acid concentration. It was found that 99.95% of copper was dissolved after 14 min with inorganic acids at 0.5 M, 25 °C and l/s . = 10 ml/g while more drastic ...

Copper recovery using leach/solvent extraction ...

processes using dilute sulphuric acid. The first process, vat leaching of high-grade copper oxide ore followed by EW of copper from the leach solution, produced low quality copper cathode at relatively high cost. In 1968 the tonnage of high-grade oxide ores was decreasing and vat leaching was on the decline.

Copper Leaching Method - Metallurgist & Mineral Processing ...

Copper Leaching Practices. For centuries small amounts of copper have been recovered from acid mine-drainage waters. In recent years, the expansion of copper-bearing waste dump leaching for copper recovery has established a technological basis that is rapidly converting the art of copper leaching into a science.