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

acid consumption and can readily be overlooked in comparison to more obvious sources of acid consumption such as carbonates. The review is intended to serve as a refresher on the role of ore and gangue minerals in leaching and to encourage greater attention to mineralogy assessment in future heap leaching projects. 2.

Low Consumption Oxide Copper Ore. Study on recovery of associated copper oxide ore by,minerals, acid consumption is greatly increased and economically unreasonable. strengthening the It is an economically acceptable reagent for treating low-grade copper oxide ore. leaching sites are mostly located on impervious hillsidesthe ore mined or crushed to a certain

With the addition of 6.2% water, the acid treatment resulted in agglomeration. Magnesium, iron, copper, zinc and etc. were dissolved as sulfates and enriched in the fine fraction of the ore. With increasing acid dosage, the copper extraction increased while the acid consumption in leaching decreased.

453 Acid leaching of oxide–sulfide copper ore prior the flotation – A way for an increased metal recovery Miroslav D. Sokić1, Vladan D. Milošević1, Velizar D. Stanković2, Vladislav Lj.Matković1, Branislav R. Marković1 1Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia 2University of Belgrade, Technical Faculty, Bor, Serbia

Table 6.8 Copper recovery and acid consumption..... 76 Table 7.1 Copper content of the Zaldivar ore for curing modeling..... 80 Table 7.2 Experimental conditions of the curing process to locate the optimum sulfuric ... Figure 3.1 Acid curing of mixed copper ores is a batch process..... 33 Figure 4.1 Column leach of mixed copper ores is a ...

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 ...

The African operations have the advantage of high ore grades (3 to 5% acid-soluble Cu), and consequently signifi-cantly higher PLS copper grades than found in other regions (43 g/L Cu design at Kamoto Copper Company, for example). Although the predominant oxide minerals, such as malachite, chrysocolla, and heterogenite, are easily leachable, acid

Processes: copper mining and production. Copper is found in natural ore deposits around the world. This page explains copper mining: the production route taken from ore-containing rock to a final product that is the highest-purity commercial metal in existence and used in a wide variety of applications essential to modern living.

20 % of the world copper production is gained by hydrometallurgical leaching processes, mainly by leaching of oxide copper ores with sulphuric acid and subsequent SX/EW-treatment. Several trials on the use of wetting agents in heap leaching of Chilean oxide copper ores have been

The present work is carried out to recover copper from lean grade copper ore (0.3% Cu) of Malanjkhand Copper Project (MCP). In Malanjkhand Copper mine rich ore containing 0.9 to 1.0% Cu is currently beneficiated. Lean grade ore with 0.3-0.4% copper, which is adjacent to the rich grade ore, may be utilized to meet the growing demand of the country.

treating acid consumption of copper ore . You may also like. Copper Mining and Extraction: Oxide Ores ... Great strides have been accomplished in the conventional treatment of copper ores, ... acid to produce copper from oxidized ores ... Made Copper the "Green" Metal; Water Consumption at Copper Mines in Arizona - AZ.

The leaching reagent (dilute sulfuric acid) is sprayed through sprinklers on top of the heap pile and allowed to trickle down through the heap, where it dissolves the copper from the ore. The resulting solution of sulfuric acid and copper sulfate is collected in a small pool. Copper concentration is around 65%. Next step is solvent extraction.

The acid consumption can be easily calculated using the leach operating parameters of SX-EW efficiency, lift height, bulk density, irrigation rate, primary leach cycle time, acid cure dose and acid concentration in the raffinate. The column leach test results and a column to heap efficiency factor are used to define the copper extraction.

instability, Caro's acid is produced on-site and used immediately for cyanide detoxification with only minimal or no storage. The reaction of Caro's acid with cyanide (and WAD cyanides) does not require a catalyst such as copper as the reaction is rapid and typically complete within a few minutes. H 2 SO 5 + CN → OCN + H 2 SO 4 − (5)

treatment of transition or sulphidic ores gave poor gold recovery and required higher reagent concentrations (Muir, 2011). Moreover, both cyanide and ammonia have detrimental environmental effects. Muir et al. (1989) reported that there arefive methodologies for treating copper–gold ores: (1) float and produce a copper–gold con-

In an effort to reduce acid consumption, the ore was pretreated by desliming followed by flotation in order to reject acid consuming dolomites and non-copper bearing micas. However, 15–20% of copper was lost to the slimes fraction, and non-copper bearing mica minerals floated faster than the cupriferous mica (such as phlogopite and chlorite).

Uses of Copper Sulphate. Copper sulphate, blue stone, blue vitriol are all common names for pentahydrated cupric sulphate, CuSO 4 5H 2 O, which is the best known and the most widely used of the copper salts. Indeed it is often the starting raw material for the production of …

at room temperature. Thus, the sulfuric acid consumption dosage is the main economy factor in the leaching process. Depending on the characteristic of the ores, sulfuric acid consumption could range from 0.4 to 0.7 Mg for every Mg of copper recovered (Wu et al., 2013). However, energy consumption

Copper - From Beginning to End. Copper is a major metal and an essential element used by man. It is found in ore deposits around the world. It is also the oldest metal known to man and was first discovered and used about 10,000 years ago. And as alloyed in bronze (copper-tin alloy) about 3000 BC, was the first engineering material known to man.

gangue acid consumption when gangue constituents (specifically dolomite) are ground to finer product sizes. Metallurgical test work indicated a potential saving in gangue acid consumption of over 20 kg/t ore when leaching at a P80 of 625 μm as opposed to leaching at a P80 of 150 μm. No benefit in copper leaching was evident in leaching at the ...

Water Consumption at Copper Mines in Arizona by Dr. Madan M. Singh ... where the lixiviating solution percolates through the ore to release the copper ions into solution. If agglomeration is used the sulfuric acid starts to dissolve the copper ... It takes about 500 gallons of water to treat a ton of copper (0.25 gallons/lb of Cu) in the ...

Treating Acid Consumption Of Copper Ore. Treating Acid Consumption Of Copper Ore If the leaching Wen JK et al Acid equilibrium during bioleaching of alkaline lowgrade sulfide copper ore 685 time of bacteria is prolonged auxiliary agent 2 will be completely oxidied When the dosage of auxiliary agent 2 is 1189 the problem of acid consumption for bacterial leaching of copper ore

Keywords: roasting, sulfidic concentrates, copper ores, cobalt ores, fluid-bed furnace ... A sulfuric acid plant is standard for the final offgas treatment. ... of heat recovery to reduce the fuel consumption. Gold ore roasters that treat the whole ore

Treatment of copper-rich gold ore by cyanide leaching ... the copper minerals because they are not collectable with xanthates (Woods, 2003). Since the beginning of the operations in 2004, millions of tons of mixed oxide/sulphide copper-gold ores with a high gangue acid consumption (GAC) were disposed on stockpiles, as they were uneconomic to treat through the old circuit configuration.

EP1838883A1 Reduction of lime consumption when treating refractory gold ores or concentrates 10/03/2007 EP1627087B1 A process for the recovery of value …

Jan 01, 2020 For hydrometallurgical treatment the economics of the process is dependent on ore mineralogy, ore grade, acid consumption, copper extraction efficiency and process unit operations. The ore analysis for the low-grade chalcopyrite ore at …

The acid is added grad u-ally to the precipitate and the whole mixture is kept well stirred in a steel tank. Due to the formation of gases, an appropriate fume hood must be used. The precipitate or sludge is washed with warm acid water after acid leach-ing treatment for removing the soluble copper-zinc sulfates and other salts.

The nitric acid pre-treatment improved the extraction of. gold and silver in subsequent cyanide leaching (1.5 g/L NaCN) to 82% Au an d 87.5% Ag with a concomitant decrease. (up to 54 %) in cyanide ...

This new copper technology utilizes smelter acid to produce copper from oxidized ores and mine wastes. Today, worldwide, approximately 20% of all copper produced is produced by this is process. In Latin America, the total is closer to 40% whereas in the United States the total is approaching 30%.

Similar solution for treatment of partially oxidized copper ore, called LPF process (leaching–precipitation–flotation), was described by Glembockij et al. (1961) and Iwasaki (1976). After leaching of flotation pulp by sulfuric acid, the iron filings were subsequently added to the pulp for copper cementation, and finally the xanthate ...

solution. The electrolyte is copper sulfate (0.7 molar) and sulfuric acid (2 molar) and the way in which the purification of the copper occurs can be seen by considering the metals likely to be found. as impurities : 3) Ag, Au and Pt are more noble than copper and therefore will not dissolve anodically.