Sulfuric Acid Leaching - search results

Leaching of Cu, Zn, and Pb from Sulfidic Tailings Under ...

12%For comparison purposes, Table 4 presents a compilation of metal leaching studies using sulfuric acid and sodium chloride as the lixiviants. Table 4 Experimental conditions and the final results for sulfate–chloride media studies. Full size table. By analyzing Table 4, ...

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CN103757267B - The leaching method again of the waste ...

The leaching method again of the waste residue that the sulfuric acid leaching manganese carbonate ore that the present invention introduces produces, be by sulfuric acid leaching manganese carbonate ore produce waste residue be milled down to particle diameter≤180 order after and≤1.5mm cavings add in the lump withstand voltage, resistance to sulfuric acid and nitric acid corrosion reactor ...

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A comparison between sulfuric acid and oxalic acid ...

A comparison between sulfuric acid and oxalic acid leaching with subsequent purification and precipitation for phosphorus recovery from sewage sludge incineration ash Water Res. 2019 Aug 1;159:242-251. doi: 10.1016/j.watres.2019.05.022. Epub 2019 May 9. Authors Sha Liang 1 ...

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Leaching of nickel from a secondary source by sulfuric acid

Double distilled water and sulfuric acid (97%) were used for was studied and the effects of sulfuric acid concentration, pulp density, rinsing and leaching processes, respectively. XRF and XRD analyses of particle size, temperature and time on nickel dissolution were eval- the raw material before rinsing are shown in Table 1 and Fig. 1, re- uated.

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SULFURIC ACID AND LEACHING REQUIREMENTS

SULFURIC ACID AND LEACHING REQUIREMENT 577 to twice the pore volume of a 30 cm soil layer for both cases. Water-applied acid theoretically lowers the ESP more than soil-applied acid at shallow depths, but does not remove exchangeable sodium at greater depths. The TDS at shallow depths is higher for water-applied acid.

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Beneficiation and Sulfuric Acid Leaching of Manganese Ore ...

The beneficiation of low-grade manganese ore is investigated using applied magnetics separation, multi-gravity separator, shaking table, flotation methods, and sulfuric acid leaching. The manganese content in the ore sampled from the Unagad deposit is 17.31%. The best option and high result among beneficiation experiments is the use of a multi-gravity...

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New Insights into the Penetration Depth of Sulfuric Acid ...

In the process of sulfuric acid curing-leaching vanadium-bearing stone coal, the curing effect is very important. The main purpose of this study is to capture the difference in the curing effect between coarse and fine stone coal, with a V 2 O 5 content of 0.88%. In this work, the effects of various factors such as sulfuric acid concentration, curing time, curing temperature, and different ...

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Performance of Sulfuric Acid Leaching of Titanium from ...

The sulfuric acid leaching of titanium from titanium-bearing electric furnace slag (TEFS) was investigated under different experimental conditions. In the sulfuric acid leaching process, the MxTi3-xO5(0≤x≤2) and diopside could react with sulfuric acid. The optimum conditions of sulfuric acid leaching process were particle size at <

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Optimization of sulfuric acid leaching of roasted ...

In many studies in the literature, sulfuric acid and hydrochloric acid are the most preferred for leaching in acidic environments [32,33,34,35,36]. It is stated in the literature that the consumption of sulfuric acid, which is the cheapest solvent for leaching of oxidized copper ores [ 37 ], varies between 0.4 and 0.7 tons H 2 SO 4 per ton of ...

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Why is sulphuric acid the preferred acid for leaching ...

Answer (1 of 2): Sulfuric acid is overwhelmingly the cheapest acid. It also has the virtue that it is bivalent which means that it is able to dissolve twice as much per concentration as nitric or hydrochloric acids. The reason for this has to do with how easy it is to get sulfur and how you make ...

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Sulfuric Acid Leaching of Heavy Rare Earth Elements (HREEs ...

The disadvantages of the above extraction processes are: (1) for the direct leaching process using sulfuric acid, the formation of REE double sulfate cannot be avoided, so it will affect the refining process of REEs, and during this process, the …

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EFFECT OF SULFURIC ACID AND LEACHING ON WHEAT …

18,900 liters sulfuric acid/ha with 120 cm leaching and 27,800 liters acid/ha with 30 cm of water for leaching, respectively, Total seedling weight was highest for both of these treatments. The electrical conductivity, sodium content, and pH were affected differently to a significant extent at different depths by the same treatment. On the average,

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Sulfuric acid injection in copper heap leaching | LEWA

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 …

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HIGH PRESSURE SULPHURIC ACID LEACHING OF LATERITIC …

High pressure sulphuric acid leaching of lateritic nickel ore 477 leaching time on high pressure sulphuric acid leaching of a local lateritic nickel ore sample having 1.37% Ni were investigated by using chemical and X-ray diffraction analyses. Other than nickel, the dissolution ratio values of cobalt, iron, magnesium,

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Selective reductive leaching of cobalt and lithium from ...

In this article, the sulfuric acid leaching of industrially produced waste LIBs scraps with 23.6% cobalt (Co), 3.6% lithium (Li) and 6.2% copper (Cu) was investigated. The industrially produced LIBs scraps were shown to provide higher Li and Co leaching extractions compared to dissolution of corresponding amount of pure LiCoO 2 .

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

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, were leached from the tailings. The leaching of iron was confirmed to be controlled by solid-film diffusion.

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Acid Leaching - Copper Ore Treatment Method

Acid Leaching Process Flowsheet. The method of dissolution by sulfuric acid and ferric sulfate with chemical precipitation by means of scrap or sponge iron appears to offer the best potential for wide application and low costs. Its basic chemistry is not complex but its economic application is dependent on handling of materials and solutions by ...

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Sulfuric acid leaching of nickeliferous laterite - AMAX Inc.

The leaching efficiency of nickeliferous lateritic ore is optimized by scalping the ore to remove a coarse low-nickel fraction and provide a fine nickel-rich fraction which is then high pressure leached in a sulfuric acid solution by controlling the parameters temperature, pulp density, the rate of acid addition, leaching time, agitation rate, etc., whereby a pregnant solution is obtained with ...

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Sulfuric Acid and Ammonium Sulfate Leaching of Alumina ...

boiled with sulfuric acid with a concentration of 5–7 wt% for 60 min, alumina was extracted to 80 %. Leaching with sulfuric acid was carried out at 90oC and reached an acid concentration of 10–20 %13. Another patent reported 30 wt% as the recommended acid concentration14.

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[PDF] Leaching of polymetallic Cu-Zn-Pb concentrate with ...

The results of polymetallic sulphide Cu-Zn-Pb concentrate leaching with sulphuric acid in the presence of sodium nitrate as an oxidizing agent, at atmospheric pressure, are presented and discussed. Chemical composition and phase ratio of the starting concentrate and solid residuals after the leaching process are shown. Chemical reactions of leaching and their thermodynamic probabilities are ...

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Investigation of the leaching mechanism of NMC 811 (LiNi0 ...

metallurgy.11 This process usually involves acid leaching to dissolve the cathode material, followed by solvent extraction or precipitation to separate each metal. Hydrochloric acid, nitric acid, sulfuric acid and several organic acids like lactic acid, citric acid, formic …

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Leaching of Metals from Hydrometallurgical Residue by ...

leaching in (0.25, 0.5, 1 and 2 (mol.L-1)) sulfuric acid solutions. The subsequent leaching was performed in the optimized acid concentrations at temperatures of (25, 45, 65 and 85 °C) for (0.5, 1, 1.5 and 2 hour) at each temperature. A variable speed stirrer operated at a speed of 100rpm was maintained during in all leaching experiments at 1MPa.

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Selective Nickel Leaching from Nickel and Cobalt Mixed ...

2.2.2 Sulfuric acid leaching tests under a low over-pressure of oxygen Using the autoclave in Fig. 3, we performed sulfuric acid leaching under a low over-pressure of oxygen. The leaching reaction involves complete oxidative leaching of sulfide under an excess oxygen over-pressure, as shown in eq. (6).

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Leaching of vanadium from LD converter slag using sulfuric ...

Acid leaching, usually with a sulfuric acid solutions decomposes the vanadium compound and causes the dissolution of vanadium (reaction 1). In order to increase the amount of vanadium in solution, salt roasting–acid leaching is a fairly general procedure which is useful in treating certain ore feed materials belonging to all types of vanadium ...

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Leaching kinetics of neodymium in sulfuric acid from E ...

Fig.3 shows the leaching results as a function of sulfuric acid concentration from 2.5 to 3.5M. The neodymium in E-scrap pow-der was completely leached out after the leaching of 4h at the condi-tion of the sulfuric acid concentration of 3.0M, pulp density of 110.8 g/L, and leaching temperature of 70oC. With increasing H 2 SO4 con-

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Sulfuric acid leaching for capturing value from copper ...

Sulfuric acid leaching of copper rich slag with the optimized parameters can provide a copper rich process solution with iron as the main impurity metal. The solution can provide an attractive feed for integration into the industrial primary copper production with acceptable low Ni, As and Pb levels (43.6 g/L Cu, 9.4 g/L Fe, 0.3 g/L Ni, 0.1 g/L ...

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Agitated Copper Leaching & Cementation Process

The reaction first oxidizes the ferrous sulfate, to ferric sulfate and then produces sulfuric acid. Under proper control about 90% of the ferrous iron is converted before the reaction makes sulfuric acid. The acid strength can be built up to or above that normally required for leaching.

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Leaching of nickel from a secondary source by sulfuric acid

The results showed that leaching of about 99% of nickel content of the washed tailing could be achieved using 4.0 mol sulfuric acid, pulp density of 1/20 gmL −1 and particle size of −180 +250 mm at 80 °C after 240 min. Kinetic analysis of the leaching data properly followed the shrinking core model, and the dissolution rate of nickel was ...

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Study of Nickel Leaching Using Sulfuric Acid and ...

In this study, the laterite nickel leaching process was carried out by varying the solution concentration and operating time. The concentrations of sulfuric acid and phosphoric acid solutions were varied at 5 M and 6 M concentrations, while the operating time was varied at 4 hours and 6 hours.

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Recovery of Cobalt in Sulfuric Acid Leaching Solution ...

ABSTRACT. Oxalic acid was used for recovering cobalt from leaching solution of spent lithium ion battery by precipitation method. Crushed powders containing LiCoO 2 of spent lithium ion battery were obtained by crushing, magnetic separation and screening process. These powders were dissolved in 2 M H 2 SO 4 solution with H 2 O 2 as a reducing agent. After dissolving Co and Li components, the ...

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(PDF) Leaching of Cu, Zn, and Pb from Sulfidic Tailings ...

using sulfuric acid and sodium chloride as the lixiviants. By analyzing Table 4, it is possible to observe metal leaching results similar or even slightl y higher t han those

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Optimization of sulfuric acid leaching of roasted ...

12%In many studies in the literature, sulfuric acid and hydrochloric acid are the most preferred for leaching in acidic environments [32,33,34,35,36]. It is stated in the literature that the consumption of sulfuric acid, which is the cheapest solvent for leaching of oxidized copper ores [ 37 ], varies between 0.4 and 0.7 tons H 2 SO 4 per ton of ...

Read more...

A comprehensive study of the leaching behavior and ...

The leaching behavior of an Iranian copper oxide ore in sulphuric acid was investigated in detail to evaluate the in uence of various factors, to optimize the dissolution conditions, and to determine the kinetics of the leaching. The results indicated that the increase in the leaching time and temperature enhanced the leaching rate of copper.

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