"leaching and recovery of zinc and copper from brass slag by"

Recovery of Copper from Reverberatory Copper Slag and ...

2016-6-8 · possible option. The copper slag contains a high content of silica and iron. The solution final pH is the most important factor affecting the removal of iron and silica from the leach solution and the overall metal recovery. Fe removal from the leaching of copper slag is done by the formation of …

Reduction Kinetics of Zinc Powder from Brass Converter ...

2016-1-8 · A pyrometallurgical reduction process for the recovery of copper and zinc from brass secondary slag (BSS) was studied. Specifically, the effect of reduction temperature and time on the conversion to metallic phases was investigated. The brass secondary slag was characterized by X-ray diffraction, inductively coupled plasma-atomic

Zinc recovery from metallurgical slag and dust by ...

2018-7-11 · 1. Introduction. Currently, the main source of zinc metal is the traditional zinc resource—zinc sulfide ores. However, as the zinc consumption increases and the zinc sulfide ore grades deteriorate, the gap between supply and demand has become a …

SCIREA

A.N. Banza, E. Gock, K. Kongolo, Base metals recovery from copper smelter slag by oxidizing leaching and solvent extraction, Hydrometallurgy 67 (2002) 63–69. [ 17 ] I.M. Ahmed, A.A. Nayl, J.A. Daoud, Leaching and recovery of zinc and copper from brass slag by sulfuric acid, Journal of Saudi Chemical Society (2012). Article in press.

Hydrometallurgical stepwise recovery of copper and zinc ...

2020-11-1 · A new process for recycling zinc and copper from the smelting slag of waste brass was investigated in this study. The zinc and copper present in the smelting slag were dissolved in a ZnCl 2 –NH 4 Cl solution system. To recycle copper, the lixivium was purified by a novel method termed as electrochemistry and chemistry synergetic (ECS) purification.

Leaching and recovery of zinc and copper from brass slag ...

Leaching and recovery processes for zinc and copper from brass slag by sulfuric acid were carried out and iron and aluminum were also precipitated as hydroxides in addition to silica gel. The factors affecting the performance and efficiency of the leaching processsuch as agitation rate, leaching time, acid concentration and temperature were ...

Leaching and recovery of zinc and copper from brass …

2017-2-21 · between zinc and copper ions in solution. Besides, with Table 1 Chemical composition of the brass slag. Element Zn *Cu Fe* Al *Si Cl Ca Contents 69 13 1.3 4.4 6.0 4.6 1.7 * Present as oxides. Leaching and recovery of zinc and copper frombrass slag by sulfuric acid S281

Removal and Recovery of Metals from Municipal Solid …

2017-3-24 · A hydrometallurgical process for the recovery of copper and zinc from MSWI ash is presented in this thesis. The process consists of leaching followed by sequential solvent extraction of metals. With respect to leaching efficiency and feasibility, it was found that hydrochloric acid is the best option for recovery of copper and zinc from the fly ...

SOLVENT EXTRACTION/ ION EXCHANGE FOR METAL …

2012-7-25 · zinc from the purified leach liquor with respect to iron is extracted with DEHPA diluted in Brass Ash/Zinc Ash H2SO4 I LEACHING I IRON PRECIPITATION DEHPA I Leach Solution Raffinate for >1 ZINC EXTRACTION 1-* Copper Extraction i Loaded Solvent !SCRUBBING Scrub Feed (Water) I 4( I Zn-STRIPPING P.E. S.E. I Zn-ELECTROWINNING I Zinc

Leaching and selective copper recovery from acidic ...

2016-4-10 · Leaching of cadmium, chromium, copper, lead, and zinc from two slag dumps with different environmental exposure periods under dynamic acidic condition. Jin Z, Liu T, Yang Y, Jackson D. Ecotoxicol Environ Saf, 104:43-50, 12 Mar 2014 Cited by: 1 article | PMID: 24632122

Leaching and recovery of zinc and copper from brass slag ...

Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): https://doi /10.1016/j.jscs... (external link)

Recovery of metal values from zinc solder dross (Journal ...

1999-7-1 · Highlights: • A cleaner cadmium, zinc and copper recovery method from zinc plant waste residues was investigated. • The mechanisms and kinetics of cadmium recovery were discussed. • The effects of leaching variables were discussed. •The XRD and morphology analysis of raw residue and leaching residue were conducted.

Leaching and solvent extraction purification of zinc from ...

2021-1-15 · Shah, K., Gupta, K. & Sengupta, B. Selective separation of copper and zinc from spent chloride brass pickle liquors using solvent extraction and …

Recovery of copper and cobalt from ancient slag

2006-4-1 · This slag contains large amounts of metallic values such as copper and cobalt. A representative slag sample containing 0.98% Cu, 0.49% Co and 51.47% Fe was used in the experimental studies. Two different methods, direct acid leaching and acid baking followed by hot water leaching were used for recovering Cu and Co from the slag.

Sulphuric acid leaching of zinc and copper from Nigerian ...

2009-8-26 · Sulphuric acid leaching of zinc and copper from Nigerian Complex Sulphide Ore in the presence of hydrogen peroxide by P.A. Olubambi*†, J.O. Borode†, and S. Ndlovu* Synopsis The leaching of zinc and copper from Nigerian bulk sulphide ore with sulphuric acid in the presence of hydrogen peroxide was studied.

Recovery of both brass and zinc from metallurgical ...

A method of recovering both brass and zinc from metallurgical residue containing those metals and including slag containing zinc oxide, comprising charging the residue into a furnace, in such furnace heating the residue up to about 1,250° C., the brass which is molten at said temperature sinking to the bottom of the furnace, adding carbon reducing zinc oxide in the slag to zinc metal in vapor ...

Reduction Kinetics of Zinc Powder from Brass Converter ...

2015-8-5 · These brass secondary slags (BSS) are by-products obtained during brass scrap smelting and crushing of brass slag. It has been estimated that for every tons of copper production about 2.2 tons of slag are generated, so that 24.6 million tons of slag result from world copper production every year (Gorai B. …

(PDF) Base metals recovery from copper smelter slag by ...

Kinetic of metal recovery by oxidising leaching with H2SO4 measured during the leaching were 292, 358, 434, of copper slag (10% solid, particle size: < 100 Am, pH 2.5, 622 and 645 mV at 15, 30 60, 90 and 120 min, temperature: 70 jC, H2O2: 35 L/(h t)). respectively.

[Leaching of nonferrous metals from copper-smelting slag ...

The best parameters of chemical leaching (temperature 70 degrees C, an initial concentration of trivalent iron in the leaching solution of 10.1 g/L, and a solid-phase content in the suspension of 10%) were selected. Carrying out the process under these parameters resulted in the recovery of 89.4% of copper and 39.3% of zinc in the solution.

Recovery of zinc and copper from brass scrap

a. leaching said copper out of said feed material by treating with aqueous sulfuric acid, in the presence of nitric acid as a promoter, to produce a solution containing copper ions; ... The copper and zinc constituents of brass alloys have substantial value and recovery of these metals from scrap alloys is economically warranted, provided that ...

Recovery of metal values from copper slag and reuse of ...

Copper slag was characterized and processed. The pyro-metallurgical processing prospects to generate utilizable materials were arrived at through rigorous thermodynamic analysis. Carbothermal reduction at elevated temperature (near 1440°C) helped recover a majority of the metal values (e.g., Fe, Cu and Mo) into the iron-rich alloy product ...

Factors on Leaching Zinc and Copper from Zinc Leach ...

It is found that cuprous sulfite, zinc sulfate and zinc sulfide were the main phases of copper and zinc in zinc leach residue, through analyzing its composition and phase characteristics by XRF and XRD. The method that cooperate sulfuric acid leaching with oxidant was chosen. 60 g/L H2SO4 at 60 °C for 2 h with 4% KMnO4 and liquid/solid ratio of 5..1, 84.29 % of Cu and 92.02 % of Zn are extracted.

Leaching and recovery of zinc and copper from brass slag ...

Leaching and recovery of zinc and copper from brass slag ...

Copper from Copper Smelting Slag by Oxidation Leaching ...

In this paper, copper was recovered from copper smelting slag by oxidation-ammonia leaching under normal pressure. Ammonia persulfate was employed as oxidizing agent and ammonia as complexing. The results showed that the optimal parameters were as following: the mass ratio of liquid and solid was 4:1, the temperature was 35°C, the leaching time was 180 minutes, the amount of (NH4)2S2O8 was 0 ...

Recovery of zinc from leach residues with minimum iron ...

2010-6-1 · By using the optimum oxidative leaching conditions, iron recovery reduced from 70% in non-oxidative leaching to 0.4 and 5% in the presence of MnO 2 and H 2 O 2, respectively, with acceptable Zn recovery. This reduction in the iron content was due to the …

Leaching and recovery of zinc and copper from brass slag ...

2016-9-1 · The effect of leaching time on the leaching of 5 g of slag using 25 g of 30% H 2 SO 4, keeping the agitation rate at 150 rpm and temperature at 35°C, was studied in the range of 5–80 min, Fig. 2 is clear that the recovery of zinc increases with increasing time up to 10 min then decreases with a further increase in time.The recovery of copper increased with time up to 30 min where it ...

Leaching and recovery of zinc and copper from brass …

ORIGINAL ARTICLE Leaching and recovery of zinc and copper from brass slag by sulfuric acid I.M. Ahmed, A.A. Nayl *,1,2, J.A. Daoud Hot Laboratories Centre, …

Leaching and recovery of zinc and copper from brass slag ...

Leaching and recovery processes for zinc and copper from brass slag by sulfuric acid were carried out and iron and aluminum were also precipitated as hydroxides in …

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2021-2-17 · Apart from that, there are few published works on extraction of copper from slag [2], recovery of tin from tin soldering dross [3] and extraction of zinc and copper from brass slag [4]. All of these published works were using either hydrometallurgical or pyrometallurgical process for metal extraction from slag or dross.

Electrolytic Recovery of Copper and Zinc from Brasses

2020-10-13 · brass could be treated to recover the copper and zinc, each in a pure state, the price received for these metals would be much higher than that received for the brass. Brasses may be treated for the recovery of copper only, by adding them to the charge of a matting furnace for treating cop-per concentrates. The copper present will unite with ...

Hydrometallurgical Recovery of Metals from Large Printed ...

2015-9-29 · The recovery of precious metals from waste printed circuit boards (PCBs) is an effective recycling process. This paper presents a promising hydrometallurgical process to …