The copper slag from the pyrometallurgical production of copper depending on its origin, contains about 35-45% wt% of iron that can be recovered, if treated suitably. Carbothermic reduction of the waste slag therefore inevitably results in the co-reduction of large amounts of iron together with copper. Higher copper content in the pig iron
in chalcopyrite, copper matte, and bornite, while iron distribute in magnetite, fayalite, and pyroxene. The proposed process involves the recovery of iron via magnetic separation from flotation tailings after recovering copper from CEFS by flotation. 72.79% of copper and 20.41% of iron were recycled from CEFS where the grades of copper and iron
extraction experiments were carried out in two stages: i) separation of zinc, aluminum, and residual iron, and ii) copper separation. The results showed that the leaching obtained around 60% aluminum, 94% copper, 76% zinc, 50% nickel and residual iron from the non-magnetic fraction of PCBs. With the solvent experiments, in the first
The Fe-Cu alloy, that is generated at the bottom of an electric furnace (EF) in a zinc pyrometallurgical smelter, is considered as a kind of solid waste. To separate the copper and iron from this waste, an innovative technology that uses selective oxidation smelting in the absence of SiO 2 is proposed herein.
Feb 20, 2021· Iron recovery from copper slag generated during copper production by the pyrometallurgical method has been widely investigated to achieve resource utilization. Liberation and enrichment of metallic iron from reductively roasted copper slag were explored in this work.
The Flash Smelting process, from Outokumpu/Finland, is the pyrometallurgical that transform directly copper sulphides, comprising the flotation concentrate, in impure metallic copper, also known as blister copper [1 - 4]. The pyrometallurgical copper extraction from copper sulphides consists, traditionally, of
An earlier work noted that magnetic separation is a feasible way to recover iron from the tailings of waste copper slag ﬂotation. Unfortunately, the iron grade of magnetic products and the recovery of iron by the magnetic separation process is relatively low, only 52.21% and 38.09%, respectively, due to the
Copper minerals,b iron and other metallic0.5-6.0 pyrites, byproducts, andgangue Solution of copper and leaching agent20-50 (water orHAO.) Copper, iron (0.2-2.00/0), trace amounts of85-90 silica and aluminum oxides, and oxygen Organic solvent and pregnantIeachate; 25-35
There are various types of pyrometallurgical process and the matte is to be produced in all of such types. Copper ores are melted, and matte and slag are produced to concentrate Cu into matte and Fe into slag and then slag is to be removed and matte is to be recovered after the separation of slag from
Graph 1 shows the availability of copper in different acidic solution and graph 2 shows the other metals obtained from leaching solution. Table 1 M etals obtained from acidic leaching solution after 60 mins s.no Metals Availability by hcl (mg/lit) Availability by hno3 (mg/lit) 1 Copper 15000 19000 2 Zinc 2.5 5.5 3 Iron
The process flow sheet for conventional pyrometallurgical extraction of copper from chalcopyrite concentrate is shown in Fig. 4. Concentrate (15-35% Cu) The overall reaction simply corresponds to oxidation of the sulfur and iron. The separation of iron and copper and extraction of copper are achieved in the converting step
Roasting, smelting, and converting are pyrometallurgical process steps that are based on the relative affinities of metals for sulfur and oxygen. A typical process flowsheet is shown in Fig. 1.Iron sulfide is primarily converted to oxide in roasting. When only about half the iron is oxidized during roasting, less nickel and copper sulfides are oxidized.
Process for recovering copper from molten converter-type slags or other highly oxidized copper smelter slags containing 7-30 percent by weight of magnetite (Fe3O4). The magnetite in the slag is reduced with carbonaceous materials or other solid reductants. While the slag is mixed with a water cooled, metal-bladed mechanical stirrer, the reductant is reacted with the slag.
separation of iron . impurities, such as copper and iron, are removed from the leach liquor by the precipitation method. The best results were obtained by combining pyrometallurgical and
Sep 05, 2017· Currently, the majority of copper tailings are not effectively developed. Worldwide, large amounts of copper tailings generated from copper production are continuously dumped, posing a potential environmental threat. Herein, the recovery of iron from copper tailings via low-temperature direct reduction and magnetic separation was conducted; process optimization was carried out, and
Pyrometallurgical routes are comparatively economical and eco-efficient if the hazardous emissions are controlled. Currently, pyrometallurgical routes are used initially for the segregation and upgrading of PMs (gold and silver) into base metals (BMs) (copper, lead and nickel) and followed by hydrometallurgical and electrometallurgical
However, pyrometallurgical processes produce large quantities of slag, and this constitutes one of the main by-products of the metal extraction industry . The average composition of primary copper slag corresponds to 3040 % iron, 35 -40% silica, less than 10 % of alumina and calcium oxide and copper
Separation of silicon and iron in copper slag by . 9/7/2020& 0183;& 32;Approximately 2.03.0 t of copper slag CS containing 35%45% iron is generated for every ton of copper produced during the pyrometallurgical process from copper concentrate.
separation efficiency of iron from copper-containing solutions can be achieved at greater iron and copper concentrations. This further verified that resin Rexp-501 is capable of separating iron from copper solutions at high concentrations. Figure 1. Iron and copper adsorption by Rexp-501 at various concentrations, 298 K.
Feb 09, 2018· Electromagnetic Separation of Chromite . Chromite, sp. gr. 4.32 to 4.6, is usually ferromagnetic; its general formula is the same as for magnetite, with part of the iron replaced by chromium; analysis, iron protoxide, 32 per cent. chromium sesquioxide 68 per cent. Electromagnetic Separation of Diamonds
Sep 10, 2019· The Fe-Cu alloy, that is generated at the bottom of an electric furnace (EF) in a zinc pyrometallurgical smelter, is considered as a kind of solid waste. To separate the copper and iron from this waste, an innovative technology that uses selective oxidation smelting in the absence of SiO 2 is proposed herein.
Dec 31, 2018· Magnetic metallic iron powder with low S and P contents, high iron content (92.96%) and high iron recovery rate (93.49%) were produced through deep reduction magnetic separation using coke powder as reductant and CaO as flux under 1,300 °C for 2h.
Pyrometallurgy Basic Principle. The basic premise of most pyrometallurgical operations is simple: high-temperature chemistry is employed to segregate valuable metals in one phase while rejecting gangue and impurities in another phase. In most instances, both phases are molten (such as the matte and slag in a conventional copper smelting operation).
IRON CONTROL IN HYDROMETALLURGY: THE POSITIVE SIDE . OF THE COIN . ABSTRACT. During the hydrometallurgical processing of the major base metals Cu, Zn, Ni and Co, the presence of iron is normally a serious complication, and iron separation from the pay metals usually constitutes one of the main challenges for the metallurgist.
The purpose of this study was to investigate the possibility of separating pyrometallurgical copper (fayalite) slag by oxidation in a synthetic air atmosphere into ferrous and silicate phases suitable for resources to be recovered from them. and (2) hematite and magnesium iron oxide (Mg(1.55)Fe( 1.6)O(4)) in the temperature range of 1073 to
US2446656A US642021A US64202146A US2446656A US 2446656 A US2446656 A US 2446656A US 642021 A US642021 A US 642021A US 64202146 A US64202146 A US 64202146A US 2446656 A US2446656 A US 2446656A Authority US United States Prior art keywords tetrahedrite metal ores furnace antimony Prior art date 1946-01-18 Legal status (The legal status is an assumption and is not
Pyrometallurgical techniques use heat to separate copper from copper sulfide ore concentrates. Process steps include mining, concentration, roasting, smelting, converting, and finally fire and electrolytic refining. 12.3.2 Process Description2-4 Mining produces ores with less than 1 percent copper. Concentration is accomplished at the
The most important target is the pyrometallurgical separation of lead and copper and the enrichment of precious metals. By-elements still existing during copper production, such as lead, bismuth, antimony and tellurium, are separated in the connected lead refinery and sold as lead bullion, lead-bismuth alloy, antimony concentrates and tellurium
Jan 01, 2015· Pyrometallurgical Recovery Of Metals From Electronic Waste Environmental Sciences Essay. Info: 4289 words (17 pages) The copper matte containing precious metals is removed and transferred to the converters. before the magnetic separation of iron and nickel from other non magnetic solids. The leaching solutions which contain oxides of
Nov 14, 2013· A physico-chemical separation process for upgrading iron from waste copper slag discarded from the conventional pyrometallurgical processes for producing copper from copper concentration was developed in the study.
Addition of iron sulfide during the first stage lowers the grade of matte which is recovered, and if iron sulfide is added in amounts necessary to effectively reduce the magnetite and copper oxide contents of the slag, a low-grade matte is produced together with an increased amount of slag in which copper values can become entrained.
Solvent extraction experiments were carried out in two stages: i) separation of zinc, aluminum, and residual iron, and ii) copper separation. The results showed that the leaching obtained around 60% aluminum, 94% copper, 76% zinc, 50% nickel and residual iron from the non-magnetic fraction of PCBs.
t is considered an actuality and problems of the Copper-smelting slags processing. It is formulated the demands, which the slag processing technology must to conform. It is given the ground for preferableness of the pyrometallurgical method, which it is caused the next factors: a) variety of slag composition, forming on the Copper founding plants and b) necessity of its selective proceeding
from Iron and Copper Mixed Waste by Ammonia Solution These pyrometallurgical processes have advantages such as high solutions.5-8) However, problems relating to the separation of copper and iron using ammonia solutions have not been solved. On the basis of this background, we focused on the selective separation of copper from iron
This stems from the relative stabilities of nickel and copper sulfides and oxides. It is possible to make copper metal by the oxidation of CU,S at relatively low temperatures (1.200·1 ,300°C); a Similar process for nickel requires temperatures in excess of 1.600°C. Pyrometallurgical separation of nickel from copper is difficult.
In modern metallurgy, pyrometallurgy is of major importance in the production of many of the most useful metals, including iron, steel, lead, copper, and nickel. The procedures that are used in pyrometallurgy are roasting, smelting, conversion, refining, and distillation.
Jan 01, 2019· Copper-iron sulphides roasting The pyrometallurgical processing experiments were conducted in a tubular furnace, where 1.0g of concentrate was disposed in a ceramic crucible. After heating to the desired temperature, the sample was then subjected to a controlled gas flow of approximately 0.3Lmin 1.
Copper extraction refers to the methods used to obtain copper from its ores.The conversion of copper consists of a series of physical and electrochemical processes. Methods have evolved and vary with country depending on the ore source, local environmental regulations, and other factors.. As in all mining operations, the ore must usually be beneficiated (concentrated).
resulted in copper and iron extractions of 20% and 52%, respectively, at 20oC, whereas the maximum copper and iron extractions were 60% and 90%, respectively, at 90oC. Also, based on the results depicted in Figure 2 and 3, it can be concluded that the iron minerals are dissolved more easily in sulphuric acid than the copper minerals,
Mar 11, 2020· In the pyrometallurgical processes, The generic solution based on sample 2 contains no copper or iron because it was only used for experiments to separate cobalt, nickel and manganese. The usage of solvent extraction for the copper separation has the advantage of a partial recirculation of the stripped copper sulfate solution to the
The metal fr action is primarily copper, iron. if required for separation of the copper and precious metals. This pyrometallurgical process also helps in precious metal recovery like Au
PYROMETALLURGICAL IRON REMOVAL FROM A PGM-CONTAINING ALLOY 169 Introduction Minteks ConRoast process recovers platinum group metals (PGMs) from roasted or low S-bearing concentrates in an iron-rich alloy (typically 70 to 85% Fe) during mild reductive smelting. Any subsequent processing of this alloy will inevitably require some form of iron
Copper slag is a waste during pyrometallurgical produc-tion of copper from copper sulfide concentrates, about 2.2 tons of which being generated per ton of metal copper lowed by dry magnetic separation to recover iron from the copper slag of Korea Zinc Co., Ltd., but the grade of prod-uct is low and SiO 2 content is as high as 12.7%.
However, pyrometallurgical processes produce large quantities of slag, and this constitutes one of the main by-products of the metal extraction industry . The average composition of primary copper slag corresponds to 3040 % iron, 35-40% silica, less than 10 % of alumina and calcium oxide and copper content is around 1 %Cu, similar to the ore
Removal by Iron and the Chlorination Process Utilizing Ammonium Chloride Osamu Terakado1, +1, copper indium gallium diselenide,7) CIGS, one of the promising photovoltaic batteries, as well as gallium Pyrometallurgical Separation of Indium Phosphide through the Phosphorous Removal by Iron and the Chlorination Process 985.