Ferric chloride leaching is a potentially attractive method of processing lead concentrates, and many studies have been carried out on the kinetics of dissolution of galena (PbS). In this paper, the extensive literature on galena dissolution is critically reviewed and the various results are compared on a consistent basis.

Brine disposal is a serious challenge of arsenic (V) removal from drinking water using ion-exchange (IX). Although arsenic removal with ferric chloride (FeCl 3) from drinking waters is well documented, the application of FeCl 3 to remove arsenic (V) from brines has not been thoroughly investigated. In contrast to drinking water, IX brines …

Here, ferric chloride and nitrate aqueous solutions are studied using polarized Raman spectroscopy as a function of concentration and referenced to their respective sodium salt or mineral …

The degree of surface passivation: ferric sulfate > ferric chloride > ferric nitrate ... 2010), and is a desired route for metal extraction, especially for low grade and mineralogically complex concentrates (Aydogan, 2006; Aydogan et al., 2005; Jena and Brocchi, 1992). ...

Research and development work on a ferric chloride leach process for lead-silver containing concentrates required mapping of the PbCl 2 solubility as a function of temperature and various co-electrolyte concentrations. A pycnometric sampling method was used to determine the solubility of PbCl 2 and the density of the corresponding PbCl 2 …

The dissolution of chalcopyrite in ferric sulphate and ferric chloride media. Metall. Trans. (1981) Flett, D.S., Melling, J., Derry, R., 1983. Chloride-metallurgy for the treatment of complex sulphide ores. ... which prevails in the chemical concentration process of polymetallic concentrates, in the S 2 O 3 2--Ca(OH) 2 system as well as a ...

The sulfide ores or concentrates are processed under conditions conductive to the formation of As 4 O 6 which is volatilized and then condenses as solid As 2 O 3 when the gas temperature drops. ... Ferric chloride leaching offers a selective method for extraction of uranium and elimination of arsenic as ferric arsenate from the leach liquor.

Copper extraction efficiencies in excess of 90% were attained in the weak acid leach while 90% silver extraction was achieved in the ferric chloride leach, along with copper and lead extractions as high as 93% and 99% respectively. The two-stage leaching process resulted in overall extraction efficiencies of 99% copper and 90% silver. Keywords

The increase in ferric chloride concentration (beyond 0,15 M) or increase in temperature affects the preferential leaching. ... Kinetics of dissolution of sulphide minerals in ferric chloride solution and application to complex sulphide concentrates. Trans. IMM (Sect. C), 97: 159-162. Shon, H.Y. and Wadsworth, M.E., 1979. Rate Processes of ...

Ferric chloride has the unusual distinction of being one of the purest and most concentrated forms of iron commercially available. However, what is truly unusual …

With the ferric chloride EDTA was added to the resolubilization buffer to inhibit the effect of the metal ions' charge on the dissolving of the proteins to the liquid . Reactions were incubated under agitation in Thermomixer Comfort (Eppendorf, Germany) for 1 h. ... The precipitation experiments of PFJ concentrates from starch industry were ...

The rates are faster inthe chloride system and the activation energy in that medium isabout 42 kJ/mol; the activation energy is about 75kJ/mol in ferric sulfate solutions. Ithas been confirmed that the rate isdirectly proportional tothe surface area ofthe chalcopyrite in both c loride and sulfate media. Sulfate concentrations, especially FeSO4 ...

The kinetics of dissolution of chalcopyrite (CuFeS2) in ferric chloride-hydrochloric acid and in ferric sulfate-sulfuric acid solutions have been investigated using the rotating ... treating copper concentrates was advanced and ferric ion leaching processes were prominent among these. The United States Bureau of Mines developed a ferric ...

In ferric chloride leaching, maximum copper extraction (95 %) was obtained at the highest ferric ion concentration (50 g/L), however even with the lowest concentration of the oxidant (10 g/L ...

CANMET has developed a Ferric Chloride Leach (FCL) process to treat these relatively low grade bulk concentrates and to obtain very high recoveries of the contained metals. …

Ferric chloride reaches higher reaction rates, but this leaching agent increases industrial costs due to equipment corrosion. ... Refractory behaviour of two sphalerite concentrates to dissolution in ferric sulphate solutions. Hydrometallurgy, 19 (2) (1987), pp. 253-258. View PDF View article View in Scopus Google Scholar.

Contact us. Back to top. Univar Solutions is one of the largest suppliers of ferric chloride in the United States with more than 120 locations throughout the nation. Our offering …

These processes recover copper via hydrometallurgical leaching of the copper component of chalcopyrite concentrates, followed by solvent extraction and electrowinning. ... T.A. Phillips, "Economic Evaluation of a Process for Ferric Chloride Leaching of Chalcopyrite Concentrate," BuMines IC, 8699 (1976), p. 22. Google Scholar

Ferric Chloride Regeneration. ... concentrate would reduce the cost of flotation as well as save some metal values lost during the production of cleaner concentrates. If the value of the sulfur recovered from the leach residue is low, its recovery would be uneconomical. Under this condition the sulfur could be discarded with the leach residue.

Significant deposits of complex fine-grained base metal sulphide ores occur in many parts of the world. To obtain high metal recoveries from such ores requires the production of bulk rather than selective concentrates. CANMET has developed a Ferric Chloride Leach (FCL) process to treat these relatively low grade bulk concentrates and to obtain very …

Smelting of copper concentrates results in the discharge of millions of tons of SO, to the atmosphere each year. Because of increasing concern with air pollution, the Bureau of Mines has developed a hydro-metallurgical procedure to obtain elemental sulfur from chalcopyrite by means of the following reaction: CuFeS2 + 3FeCl3 → CuCl + …

To this end, chalcopyrite was autogenously milled in a horizontal mill, and leaching was conducted using a 5 M chloride leach solution. Leaching of as-received concentrate resulted in copper extractions of 75% in 5 h of leaching, whereas leaching mechanically activated concentrates resulted in copper extractions over 95% after 3 h of …

The table below gives the density (kg/L) and the corresponding concentration (% weight) of Ferric Chloride (FeCl 3) solutions in water at different temperatures in degrees centigrade (°C). The table was taken from "Perry's Chemical Engineers' Handbook" by Robert H. Perry, Don Green, Seventh Edition. Please see the Examples page for more details.

Optimum precipitating concentrations of ethanol and ferric chloride in PFJ were 4 M (23.1% v/v) and 20 mM (2% w/v), resulting in yield of 69% and 86.5% of total protein, respectively. Contents of total glycoalkaloids and potassium in both protein concentrates were significantly lower (P < 0.05) as compared with contents in PFJ dry …

Nie et al. 19 examined the carbon steel corrosion in salty test soils with the chloride concentration as high as 1.41 wt.%. However, it only emphasized the essential …

1. Introduction. Ferric chloride and/or cupric chloride leaching processes have been extensively studied to treat sulfide concentrates of copper, lead and zinc (Peters, 1977, Dutrizac, 1990, Dutrizac, 1992, O'Malley and Liddell, 1987).Chloride leaching has several advantages for hydrometallurgical processes, with respect to sulfate …

In this paper, the effect of the cupric and chloride ions concentrations on copper dissolution from chalcopyrite concentrate was studied in acidified media. Variables included three different concentrations of Cu2+ (0.5, 1.5, and 2.5 g L−1), four different concentrations of Cl− (0, 5, 7, and 10 g L−1), two different pH values of 1 and 2, and a …

Here molybdenum concentrates are slurried with hot ferric chloride leach solution to dissolve the copper and lead contaminants present. The primary function of the filtration and thickening circuits is to recover spent ferric chloride leach solution from the leached moly concentrates. Since approximately 2.5 percent of the ferric chloride in ...

It has been shown in a number of studies that one-stage ferric leaching of various raw materials (slags, sulfide concentrates) using solutions containing ferric sulfate makes it possible to effectively extract non-ferrous metals into solution [66,67,68,69]. However, the problem is obtaining solutions of ferric ions in amounts sufficient for the ...

Ferric chloride is an inorganic compound with formula FeCl3 which has numerous industrial, pharmaceutical and laboratorial uses. In this article we will discuss ferric chloride structure with its physical and chemical properties, ferric chloride test for phenols and applications in various fields. Ferric chloride is named as iron chloride.