Sulfuric Acid Leaching - search results


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 ...


[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 ...


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-


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 …


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 ...


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, ...


High Pressure Sulfuric Acid/Oxygen Leaching of Platinum ...

High Pressure Sulfuric Acid/Oxygen Leaching of Platinum Group Metals Bearing Ni-Cu Mattes. smelting, and converter treatment of the furnace matte. Leaching circuits are. contained in the converter matte. Nickel dissolution is primarily achieved in. acid/oxygen leaching to dissolve copper and the remaining nickel.


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 ...


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...


Thermodynamics and Kinetics of Sulfuric Acid Leaching ...

The stable zone of HF and Nd 3+ was determined from the ɛ-pH diagram, and the reaction conditions were controlled so that NdF 3 could be converted into HF and Nd 3+ as much as possible to ensure the smooth progress of sulfuric acid leaching reaction.It can be seen from Figures 4–7 that with the increase of temperature and activity, the stability area of HF significantly increased.


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 ...


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,


Kinetics of sulfuric acid leaching of a uranium ore with ...

@misc{etde_6501959, title = {Kinetics of sulfuric acid leaching of a uranium ore with Oxone} author = {Chutinara, D, Torma, A E, and Singh, A K} abstractNote = {The present study investigated uranium extraction from a low-grade ore with sulfuric acid and Oxone used as an oxidant. The maximum theoretically attainable rate of uranium extraction was found to be Vsub(m) = 381 mmol m/sup …


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 ...



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.


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.


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 <


Sulfuric Acid - University of Arizona

Sulfuric acid (H 2 SO 4) is a strong acid. It is an odorless, clear to dark brown, oily liquid that is corrosive. Sulfuric acid has many industrial purposes and is produced in greater quantities than any other chemical worldwide. In metal mining, sulfuric acid is used to leach copper oxide minerals. In one process, a solution of sulfuric acid laden


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 ...


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.


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 ...


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 ...


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.


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 ...


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 …


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,


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.


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 phosphate that binds to the monazite cannot be separated immediately; (2) consumption of sodium ...


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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