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Question: For a sulphuric acid-based leaching process, which temperature range and H2SO4 concentration would you recommend for leaching the valuable metals (Ni, Mn, Co, Li). I am looking for justification of my answer.
Acid Storage. The large storage-tank for 66° B. acid is 8 feet in diameter and 8 feet high, lined with 10-pound lead. It holds about 46,000 pounds of 66° sulphuric acid. The small tank is the old Roessler converter 4 feet in diameter and 6 feet high, and holds about 8000 pounds.
高达12%返现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 studies were carried out on Indian Ocean manganese nodules using sulphuric acid as the lixiviant. By leaching the nodules with 8 per cent sulphuric acid for 12h at 100C, copper and nickel could be completely extracted along with 50 per cent cobalt and 6.2 per cent manganese.94.2 per cent of the iron was also dissolved. To increase manganese and cobalt extraction, charcoal was used as ...
sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as leaching time from 0.25 – 4 h, pH range 0.5 – 4 ...
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 .
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.
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 ...
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 <
The behaviour of zinc and iron under the influence of sulphuric acid as the leaching agent is discussed. The dependency between the temperature and the liquid/solid ratio is investigated. The main aim is the transfer of zinc into the solution while iron ought to remain as a solid residue.
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.
Sulphuric acid leaching has been used in the treatment of lateritic ores for the recovery of nickel and cobalt therefrom. However, in order to obtain good extraction from these ores, prolonged treatment using acid of high strength and also using high pressures and recycling steps have been necessary. In the improved method of the invention nickel and cobalt is solubilized from high-magnesia ...
@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 …
ing of sulfuric acid concentration, the leaching rate of Ni and Co increase obviously. When the sulfuric acid con- centration increased to 40 wt%, the leaching rate are above 96%, while it can be seen that the increasing is . relatively slow. Therefore the optimum sulfuric acid con- centration is …
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.
calcinations temperature of 650oC; leaching temperature of 70.02oC; acid concentration of 1.89mol/cm3; liquid-solid ratio of 10.67 and stirring speed of 379.80rpm at an optimum yield of 84.7%. Keywords: Clay, leaching, iron oxide, sulphuric acid, calcinations, ANOVA . Introduction. Iron in form of oxide is a major component of clay. The
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 …
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 …
Sulphuric acid with hydrogen peroxide leaching These experiments were conducted to determine the effect of hydrogen peroxide concentration on the dissolution rates in sulphuric acid. Equal volumes of 50 ml each of sulphuric acid and hydrogen peroxide were introduced into the reactor vessel. At the reaction temperature, 2 g of ore with a particle
A new method of altered ilmenite processing has been studied. In this method, sulfuric acid is used as the reaction medium of the process, and fluoride ions are activators of the dissolving process of the rutile part of the ore raw material. The regression model of the sulfate–fluoride leaching process was developed and analyzed by using the response surface method of 23 matrix.
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 ...
Variation of solution Eh and pH during the leaching, (a) 0.732M sulphuric acid at 20oC and (b) 0.732M sulphuric acid and (0.018-0.054M) hydrogen peroxide at 20 and 25oC. Figure 3.X-ray diffraction peaks of hand-picked grains of minerals (green malachite and gray heterogenite) Table 1. XRF Analysis (%) of samples of different size fractions ...
Sulfuric acid, the leaching agent, is brought on site in large tankers. The sulfuric acid is diluted and sprayed or dripped over oxide ore, which dissolves the oxidized minerals completely in the solution. The solution, "pregnant" with the dissolved metals, is then piped to the SX-EW plant that separates out the copper into 99% pure bars. ...
Column leaching test was carried out for uranium ore samples obtained from a uranium in-situ leaching (ISL) mining site using 2.45 bed volumes (BVs) of 0.255 M sulphuric acid to study the evolution of uranium concentration and its isotopic 234 U/ 238 U activity ratio in the pregnant leach solution. The activity ratio of the two uranium isotopes in the pregnant leach solution was measured …
The changes in exchangeable sodium and total dissolved salts due to the application of sulfuric acid and water to sodium-affected calcareous soils were studied for the purpose of establishing a convenient way of determining acid and leaching water requirements. Conventional methods which ignore the effect of sodium removed from soil exchange sites are inadequate for estimating amounts of acid ...
Acid Storage. The large storage-tank for 66° B. acid is 8 feet in diameter and 8 feet high, lined with 10-pound lead. It holds about 46,000 pounds of 66° sulphuric acid. The small tank is the old Roessler converter 4 feet in diameter and 6 feet high, …
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 ...
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 ...
