ore processing sulfuric acid

ore processing sulfuric acid

The sulfuric acid bake and leach route for processing of ...

2019-9-1  The sulfuric acid bake is currently used in the processing of concentrates from two major rare earth deposits, namely Bayan Obo in China and Mt. Weld in Australia (with processing facility in Kuantan, Malaysia) operated by Lynas (Gupta and Krishnamurthy, 2005).

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(PDF) Kinetics of Leaching Process Using Sulfuric Acid for ...

The leaching of uranium from Sella uranium ore using sulfuric acid solution has been studied. The effect of different parameters such as leaching time, sulfuric acid concentration, ore

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Leaching Process by Sulfuric Acid Reactions

2020-5-27  Leaching with sulfuric acid cannot ensure complete recovery of titanium from this ore due to the chemical inertness of rutile with respect to concentrated sulfuric acid. The undissolved rutile in the composition of the sludge after processing of ilmenite ores moves into dumps, which leads to accumulation of waste products in

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Sulfuric acid extraction of uranium from its ores (Patent ...

The ore is wet ground, and the ground ore is dewatered. The dewatered ground ore is then mixed with sulfuric acid so that the initial concentration of sulfuric acid in the moist ore is less than 4N. The moist acidified ore is then cured at a temperature of from 50 to 100/sup 0/C while an oxidizing gas is passed through the moist ore.

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(PDF) Leaching of rare earth elements with sulfuric acid ...

Dissolution of rare earth elements from bastnasite ores was studied using sulfuric acid at the atmospheric pressure. The one step strategy with sulfuric acid was studied further

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Germanium Gallium Ore Leaching with Sulfuric Acid

2018-9-23  Sulfuric acid leaching of Apex ore was initially tested at 20% solids for 2 hr at 80°C. Figure 1 shows the effect of increasing the initial sulfuric acid concentration on germanium, gallium, and

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Some Features of the Sulfuric Acid Leaching of the

2020-12-30  The reduced ore (cinder) was leached with a weak solution of sulfuric acid (10% solution of H 2 SO 4) on a Mettler Toledo 750 setup (Switzerland) equipped with a software. During leaching, the pH of the solution was maintained within pH 1.5–2.5 for a specified time of 15–120 min, and the consumption of H 2 SO 4 was simultaneously detected.

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Acid Pressure Leaching of Nickeliferous Laterite Ore

2018-8-13  The AMAX sulfuric acid leaching process involves countercurrent digestion of nickeliferous laterite ore at high pressure and at atmospheric conditions. After solid/liquid separation, the nickel and cobalt values are precipitated by hydrogen-sulfide

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Mining and Extraction: Oxide Ores - processes for ...

In what looks like a lucky coincidence, sulfuric acid is needed to treat oxide ores in processes called leaching and SX-EW (Solvent Extraction – Electrowinning). The acid would have to be made anyway as it would be environmentally unacceptable to release sulfur dioxide gas into the atmosphere. Leaching Oxide Ores with Sulfuric Acid

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Pyrite in the Roasting-Sulfuric Acid Leaching Process of ...

2020-6-9  Currently, blank roasting-acid leaching is an e ective technique to recover vanadium from stone coal. Sulfuric acid is widely used as a leaching reagent, coupling with fluorides (CaF2, HF, and NH4F) to enhance the vanadium leaching e ciency [3,4]. However, the selectivity of vanadium is not as good as expected.

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Process of sulfuric acid leaching silicated zinc ores ...

A process of leaching silicated zinc ores with sulfuric acid in which the ore is reacted at elevated temperature with at least a stoichiometric amount of sulfuric acid, treating products of the reaction with a predetermined quantity of hot water, filtering the zinc sulfate solution from precipitated silica, washing with a further predetermined quantity of hot water (the total amount of hot ...

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US4070260A - Process of sulfuric acid leaching silicated ...

A process of leaching silicated zinc ores with sulfuric acid in which the ore is reacted at elevated temperature with at least a stoichiometric amount of sulfuric acid, treating products of the reaction with a predetermined quantity of hot water, filtering the zinc sulfate solution from precipitated silica, washing with a further predetermined quantity of hot water (the total amount of hot ...

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LEACHING OF RARE EARTH ELEMENTS WITH SULFURIC

2018-10-9  The sulfuric acid leaching process was studied for processing roasted ore of Dechang bastnasite in Sichuan, China, in order to obtain rare earth elements (Feng et al, 2013, pp.849-854). Using particle size (0.074-0.100mm), 1.5 mol/L sulfuric acid concentration, mass ratio of liquid to solid 8 and stirring speed of 500 rpm, the reaction rate of the

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Nickel leaching from laterite ores by combination of ...

2021-8-10  The highest nickel extraction from limonite and saprolite ore by a combination of citric acid and sulfuric acid are 73% and 91%, respectively, after 8h of leaching at 95oC with solid liquid ratio of 5 %, stirring speed 200 rpm using 0.5 M citric acid + 2 M sulfuric acid and 2 M citric acid+0.5 M sulfuric acid

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Hydrogen peroxide in sulfuric acid extraction of uranium ...

Most of this uranium ore processing employs leaching in dilute sulfuric acid. Normally, this sulfuric acid leaching is carried out at pH≤1 with an oxidant added to raise the uranium (IV) to uranium (VI), R. C. Merritt, The Extractive Metallurgy of Uranium, Chapters 5 15, (1971), Colorado School of Mines Research Institute.

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KINETIC MODELS OF NICKEL LATERITE ORE LEACHING

The subject of this study is leaching process of nickel-bearing laterite ore from Ržanovo, R. Macedonia. The influence of sulfuric acid concentration (0.5, 1 and 3 M H2SO4) on the extracted Ni (%, wt.) was studied. The leaching process intensified by magnetic stirring at different temperatures (298, 323, 348 and 363 K) in the time interval of 120 min. was performed.

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Acid Pressure Leaching of Nickeliferous Laterite Ore

2018-8-13  The first commercial operation to utilize sulfuric acid pressure leaching to process nickeliferous laterite ore was Freeport Sulfur’s Moa Bay plant in Cuba. The Cuban government expropriated this plant in 1960 shortly after startup. The ore

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Mining and Extraction: Oxide Ores - processes for ...

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. 2. Dilute sulfuric acid is poured over the crushed ore

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mining of phosphoric acid ore

Phosphate ore processing for phosphoric acid . 2013-11-29 In the classical wet process, wet process PA is produced by a reaction between the ore and sulphuric acid, forming 30% solids thick slurry, in three stages: acidulation, filtration and concentration to produce a 50%P 2 O 5 acid.

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Pyrite in the Roasting-Sulfuric Acid Leaching Process of ...

2020-6-9  Currently, blank roasting-acid leaching is an e ective technique to recover vanadium from stone coal. Sulfuric acid is widely used as a leaching reagent, coupling with fluorides (CaF2, HF, and NH4F) to enhance the vanadium leaching e ciency [3,4]. However, the selectivity of vanadium is not as good as expected.

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ore processingsulfuric acid - greenrevolution

ore processing sulfuric acid. Sulfuric acid (alternative spelling sulphuric acid) is a highly corrosive strong mineral acid with the molecular formula H 2 SO 4. It is pungent-etherealWe use sulfuric acid in just about everything we consume. It is used in batteries, paint, fertilizer, ore processing, steel production and water treatment. Read more

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US4070260A - Process of sulfuric acid leaching silicated ...

A process of leaching silicated zinc ores with sulfuric acid in which the ore is reacted at elevated temperature with at least a stoichiometric amount of sulfuric acid, treating products of the reaction with a predetermined quantity of hot water, filtering the zinc sulfate solution from precipitated silica, washing with a further predetermined quantity of hot water (the total amount of hot ...

More

LEACHING OF RARE EARTH ELEMENTS WITH SULFURIC

2018-10-9  The sulfuric acid leaching process was studied for processing roasted ore of Dechang bastnasite in Sichuan, China, in order to obtain rare earth elements (Feng et al, 2013, pp.849-854). Using particle size (0.074-0.100mm), 1.5 mol/L sulfuric acid concentration, mass ratio of liquid to solid 8 and stirring speed of 500 rpm, the reaction rate of the

More

Hydrogen peroxide in sulfuric acid extraction of uranium ...

Most of this uranium ore processing employs leaching in dilute sulfuric acid. Normally, this sulfuric acid leaching is carried out at pH≤1 with an oxidant added to raise the uranium (IV) to uranium (VI), R. C. Merritt, The Extractive Metallurgy of Uranium, Chapters 5 15, (1971), Colorado School of Mines Research Institute.

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Nickel leaching from laterite ores by combination of ...

2021-8-10  The highest nickel extraction from limonite and saprolite ore by a combination of citric acid and sulfuric acid are 73% and 91%, respectively, after 8h of leaching at 95oC with solid liquid ratio of 5 %, stirring speed 200 rpm using 0.5 M citric acid + 2 M sulfuric acid and 2 M citric acid+0.5 M sulfuric acid

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Sulfuric acid - Exposure Summary

Sulfuric acid's production and use in the manufacture of fertilizers, explosives, dyestuffs and other chemicals and in petroleum refining, ore processing, paper manufacture and other uses may result in its release to the environment through various waste streams. Sulfuric acid droplets can form in the air when sulfur dioxide is released from ...

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HIGH PRESSURE SULPHURIC ACID LEACHING OF

2016-12-27  Co increased up to acid/ore ratio of 0.3, and above 0.3, lower dissolution ratio values were obtained. Although leach residues obtained after leaching at acid/ore ratio of 0.3 contained mainly hematite, quartz and anhydrite, the use of higher amounts of acid

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mining of phosphoric acid ore

Phosphate ore processing for phosphoric acid . 2013-11-29 In the classical wet process, wet process PA is produced by a reaction between the ore and sulphuric acid, forming 30% solids thick slurry, in three stages: acidulation, filtration and concentration to produce a 50%P 2 O 5 acid.

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The Industrial Production of Sulfuric Acid

2018-3-19  The Contact Process is the chemical process used to make sulfuric acid. It is composed of a number of chemical reactions, or steps, each occurring under different conditions and in different industrial chambers. The FOUR steps are: Combustion of sulfur into sulfur dioxide

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Uranium Mining and Extraction from Ore - Stanford

2016-8-3  Fig. 2: Process scheme for uranium mining and processing to produce useable uranium product, including chemical equations for acid and alkaline leaching process. Uranium Extraction Uranium leaching is the process by which the uranium is extracted from the raw ore by reacting the material with acid

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