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Leaching of iron from copper tailings by sulfuric acid ...

Its main components are fayalite (Fe 2 SiO 4) and magnetic iron oxide (Fe 3 O 4), accounting for more than 55% of the copper tailings. 1 In 2015, it is estimated that 68.7 million tons of copper tailings were produced worldwide. 2 Copper tailing is often discarded into stock dumps or sold for use in cement and roadbed production. 3,4 These ...

Leaching of iron from copper tailings by sulfuric acid ...

In this study, the kinetics and mechanism of the leaching of iron from copper tailings using sulfuric acid were studied. Under optimal conditions (40 °C, sulfuric acid concentration of 0.53 mol L −1 , stirring speed of 400 rpm, solid/liquid ratio of 1 : 10 and leaching time of 120 min), 66.45% of Fe, along with 65.32% of Zn and 59.95% of Cu ...

Tailings - Wikipedia

The effluent from the tailings from the mining of sulfidic minerals has been described as "the largest environmental liability of the mining industry". These tailings contain large amounts of pyrite (FeS2) and Iron(II) sulfide (FeS), which are rejected from the sought-after ores of copper and nickel, as well as coal. Although harmless underground, these minerals are reactive toward air in the presence of microorganisms, which if not properly managed lead to acid mine drainage.

Geotechnical Properties of Mine Tailings

for the iron and copper tailings, respectively, and finally saturated under a vacuum. The specimens for the permeability tests were 10 cm in diameter and 10 cm in height. Except for the specimen preparation, tests were completely conformed to ASTM standard D5084

How to generate value from tailings with reprocessing to ...

Oct 15, 2019  Due to growing mining volumes, global tailings generation was estimated to total ~3.2 bn tons for copper and ~1.8 bn tons for iron in 2018. It is well known by the mining industry that the cost of tailings management and reclamation are significant for business profitability and long-term survival.

Mine tailings: reprocess, recover recycle – The ...

Sep 13, 2019  According to research by mineral processing firm Metso, the quantity of tailings generated each year by the copper industry alone amounts to 2.9 billion tonnes, and iron-ore production adds a further 1.6 billion tonnes.

RECOVERY OF COPPER FROM COPPER SLAG AND COPPER

copper dissolution is accompanied with higher iron dissolution. That is, higher copper and iron extractions were observed with the slag rather than slag flotation tailings. Thus, the maximum copper and iron extractions achieved with the slag were 26.0% and 62.5%, respectively, as opposed to the slag flotation tailings where the maximum copper ...

Geotechnical Properties of Mine Tailings Journal of ...

The engineering properties of tailings are important for the safety evaluation and engineering design of tailing dams. In the present study, laboratory experiments were performed to investigate the geotechnical properties of four different tailings, including two iron tailings (coarse and fine) and two copper tailings (coarse and fine).

Conflicted Over Copper: How the Mining Industry Developed ...

Jun 05, 2020  Copper stamp mines crushed the copper out of the surrounding rock and produced massive amounts of sand, or tailings. “Iron waste was less toxic than copper tailings, but the refining process added significant quantities of mercury to the watershed,” environmental historian Nancy Langston wrote in “ Sustaining Lake Superior: An ...

Leaching of iron from copper tailings by sulfuric acid ...

In this study, the kinetics and mechanism of the leaching of iron from copper tailings using sulfuric acid were studied. Under optimal conditions (40 °C, sulfuric acid concentration of 0.53 mol L −1 , stirring speed of 400 rpm, solid/liquid ratio of 1 : 10 and leaching time of 120 min), 66.45% of Fe, along with 65.32% of Zn and 59.95% of Cu ...

Leaching copper tailings

the solution on scrap iron, the method that is at the present time used on copper bearing mine waters. There is very little information on the leaching ... case for testing the possibility of leaching the copper tailings. The ore used,was a low grade copper tailing. The are is highly si1icous, which fact is favorable to

How to generate value from tailings with reprocessing to ...

Oct 15, 2019  Due to growing mining volumes, global tailings generation was estimated to total ~3.2 bn tons for copper and ~1.8 bn tons for iron in 2018. It is well known by the mining industry that the cost of tailings management and reclamation are significant for business profitability and long-term survival.

RECOVERY OF COPPER FROM COPPER SLAG AND COPPER

copper dissolution is accompanied with higher iron dissolution. That is, higher copper and iron extractions were observed with the slag rather than slag flotation tailings. Thus, the maximum copper and iron extractions achieved with the slag were 26.0% and 62.5%, respectively, as opposed to the slag flotation tailings where the maximum copper ...

Recovering Iron from Iron Ore Tailings and Preparing ...

Recently, a method involving direct reduction followed by magnetic separation has been used to recover iron from red mud, vanadium tailings, pyrite slag, copper slag, cyanide tailings, and IOTs [14,15,16,17,18,19]. This method has the advantage of high iron recovery, and is especially suitable for ore with a low iron grade.

Conflicted Over Copper: How the Mining Industry Developed ...

Jun 05, 2020  Copper stamp mines crushed the copper out of the surrounding rock and produced massive amounts of sand, or tailings. “Iron waste was less toxic than copper tailings, but the refining process added significant quantities of mercury to the watershed,” environmental historian Nancy Langston wrote in “ Sustaining Lake Superior: An ...

How to generate value from tailings with reprocessing to ...

Jun 02, 2020  In gold, copper sulfide and iron ore tailings, the potential of extracting minerals is an opportunity. Reprocessing tailings to collect the valuable minerals can be a cost-effective approach ...

Economic Potential for reprocessing Copper Mine Tailings ...

A total of 81 tailings samples were analyzed using XRF, during the survey sampling. The copper grade of the tailings varied between 0.1 % and 1.7 %. Further elements of interest were iron, gold, molybdenum and zinc. This data and the tonnage of the tailings ponds was the basis to select four sites for a more detailed

Santo Domingo Iron-Copper-Gold Mine, Region III - Mining ...

Iron is recovered from the copper flotation rougher tailings through magnetic separation and floatation circuit. Recovered magnetite is filtered and stored at the magnetite stockpile. Tailings from the ore processing is sent to the tailings storage facility. Transportation and handling of processed copper and iron concentrate

Environmental Risks From Mine Tailings

Aug 10, 2018  Tailings from copper and uranium mining often produce measurable levels of radioactivity. Tailing Ponds . Some mining wastes become very fine after they have been ground up during processing. The ...

Recovery of iron from copper tailings via low-temperature ...

Currently, the majority of copper tailings are not effectively developed. Worldwide, large amounts of copper tailings generated from copper production are continuously dumped, posing a potential environmental threat. Herein, the recovery of iron from copper tailings via low-temperature direct reduction and magnetic separation was conducted; process optimization was carried out, and the ...

New global tailings standard guidelines aim for zero harm ...

Aug 06, 2020  The first-ever Global Industry Standard on Tailings Management is aimed at strengthening ... The mining windfall is the latest sign of a boom in iron ore, copper

Copper extraction - Wikipedia

Copper ores containing chalcopyrite can be concentrated to produce a concentrate with between 20% and 30% copper-in-concentrate (usually 27–29% copper); the remainder of the concentrate is iron and sulfur in the chalcopyrite, and unwanted impurities such as silicate gangue minerals or other sulfide minerals, typically minor amounts of pyrite ...

Experimental Study of the Sulphatizing Roasting of ...

Mar 01, 2021  The effect of temperature, duration of sulphatizing roasting, as well as the amount of iron sulfates on the conversion of zinc, copper, iron and other components in the tailings into water-soluble sulfate compounds were studied. The experiments have shown that there is no significant difference between using of both iron sulfates.

Leaching of iron from copper tailings by sulfuric acid ...

Its main components are fayalite (Fe 2 SiO 4) and magnetic iron oxide (Fe 3 O 4), accounting for more than 55% of the copper tailings. 1 In 2015, it is estimated that 68.7 million tons of copper tailings were produced worldwide. 2 Copper tailing is often discarded into stock dumps or sold for use in cement and roadbed production. 3,4 These ...

Recovery of iron from copper tailings via low-temperature ...

R.M. Jiao et al., Recovery of iron from copper tailings via low-temperature direct reduction and 975 the industrial scale requires further examination. Numer-ous laboratory-scale studies have ...

Leaching copper tailings

the solution on scrap iron, the method that is at the present time used on copper bearing mine waters. There is very little information on the leaching ... case for testing the possibility of leaching the copper tailings. The ore used,was a low grade copper tailing. The are is highly si1icous, which fact is favorable to

Base Metal and Iron Ore Mining

base metals (copper, lead, nickel, and zinc) and of iron. The documents on Aluminum and on Coal Mining and Production also deal with min-ing activities. ... the tailings generated also have to be managed. Ores with a low metal con-tent, say, less than 0.4%, generate significant

How to generate value from tailings with reprocessing to ...

Jun 02, 2020  In gold, copper sulfide and iron ore tailings, the potential of extracting minerals is an opportunity. Reprocessing tailings to collect the valuable minerals can be a cost-effective approach ...

Economic Potential for reprocessing Copper Mine Tailings ...

A total of 81 tailings samples were analyzed using XRF, during the survey sampling. The copper grade of the tailings varied between 0.1 % and 1.7 %. Further elements of interest were iron, gold, molybdenum and zinc. This data and the tonnage of the tailings ponds was the basis to select four sites for a more detailed

Copper extraction - Wikipedia

Copper ores containing chalcopyrite can be concentrated to produce a concentrate with between 20% and 30% copper-in-concentrate (usually 27–29% copper); the remainder of the concentrate is iron and sulfur in the chalcopyrite, and unwanted impurities such as silicate gangue minerals or other sulfide minerals, typically minor amounts of pyrite ...

New global tailings standard guidelines aim for zero harm ...

Aug 06, 2020  The first-ever Global Industry Standard on Tailings Management is aimed at strengthening ... The mining windfall is the latest sign of a boom in iron ore, copper

Experimental Study of the Sulphatizing Roasting of ...

Mar 01, 2021  The effect of temperature, duration of sulphatizing roasting, as well as the amount of iron sulfates on the conversion of zinc, copper, iron and other components in the tailings into water-soluble sulfate compounds were studied. The experiments have shown that there is no significant difference between using of both iron sulfates.

Santo Domingo Iron-Copper-Gold Mine, Region III - Mining ...

Iron is recovered from the copper flotation rougher tailings through magnetic separation and floatation circuit. Recovered magnetite is filtered and stored at the magnetite stockpile. Tailings from the ore processing is sent to the tailings storage facility. Transportation and handling of processed copper and iron concentrate

PAPER OPEN ACCESS Comprehensive Utilization of Iron ...

Iron tailings are the waste residue discharged from iron ore after they are selected by the ore dressing process. With the rapid development of iron and steel industry, the scale of iron ore development has ... the copper elements, and obtained copper concentrate with copper grade of 23.7% and recovery rate of 68.9%. In order to fully recover ...

TENORM: Copper Mining and Production Wastes Radiation ...

Copper mining waste storage piles may be as large as 1,000 acres and typically include three types of waste; tailings, dump and heap leach wastes, and waste rock and overburden. The amount of marketable copper produced is small compared to the original material mined.

Clean energy technology to come from ‘waste’ at Whitehorse ...

Dec 22, 2020  The tailings are a byproduct of the former mine’s milling operation and are rich in magnetite iron ore, Greetham found. Most commercially viable deposits of magnetite ore contain between 50 and 60 per cent iron. The copper mine site ore presented as 68 per cent iron, making it “ultra clean” and valuable to global markets, Greetham said.

Does copper sulphate+fine iron filings produce an ...

1. Measure 10 ml of the blue copper sulphate solution. 2. Measure out about 4.0 grams of black iron filings. 3. Pour the blue copper sulphate solution into the test tube. 4. Add the black iron filings. 5. Put the stopper in the test tube and shake...