Slag produced by flash furnace operations contains significantly higher amounts of copper thanreverberatory or electric furnaces. Flash furnace slag is treated in a slag cleaning furnace with coke oriron sulfide. Because copper has a higher affinity for sulfur than oxygen, the copper in the slag ascopper oxide is converted to copper sulfide. The copper sulfide is removed and the remaining slag
The density of copper slag varies between 3.16 and 3.87 gcm 3 based on the amount of iron content. The average specific gravity of copper slag is about 3.5 gcm 3, which means copper slag is denser than ordinary natural aggregates. In general, water absorption of copper slag is very low.
Sep 21, 2012 The electric furnace or rotary slag-cleaning furnace are now generally used to perform this task, giving a level of copper in discard slag typically in the range of 0.55 wt. and 1.3 wt., with most plants reporting copper losses in the discard slag in the range of 0.81.0 wt..
Efficiency of copper recovery from a slag in an electric furnace depends on number of factors. The furnace dimensions play significant role, determining slag circulation pattern and velocity, mass transfer onto slagcoke and slagelectrodes reaction surface,
of molten material. The furnace is fed continuously with copper concentrates and fluxes oxygen-enriched air is injected into the bath through the lance, creating very intense bath agitation and a rapid reaction rate. The bath principally consists of molten iron-silicate slag and molten copper matte.
Water-cooled copper launders use the freeze lining principle to reduce component wear. Lower wear means longer launder life, cutting long-term maintenance costs and downtime production losses. Many launder designs present an inherent safety risk by positioning the water cooling passages underneath the slag
In the present work, the effects of amount of coke, reduction temperature and furnace types on copper slag smelting in a dc arc furnace were studied. Optimum coke amount was found to be 10 of the slag weight in an open-top furnace for a 1 hour reduction time in the temperature between 1703 K and 1753 K. Similar conditions in a closed-top furnace resulted in higher cobalt and copper contents ...
Generally speaking, the copper dross is treated by rotatory reverberatory furnace. In case of copper dross with high arsenic, tin and antimony, caustic soda plus iron filings are used. In reaction with caustic soda, the arsenic, tin and antimony report to sodium salt as slag
1.3 Characterisation of the slag The slag type used in copper industry is normally a fayalitic based slag 2. After processing the slag in the submerged arc furnace the slag still contains valuable metals. A typical slag composition including the main metal contents is given in Table 1.
It is made up of steel plate inside the blast copper slag and normal concrete mix.7 furnace with fire clay brick at outside. Hot air of 800 oC are Wei Wu et al. 2010 studied onMechanical properties of introduced at the base of furnace and that makes two molten copper slag reinforced concrete under dynamic condition. separated layers at base ...
Oct 05, 2020 The advanced metal furnace excavation site near the modern-day city of Beersheba, Israel. Talia Abulafia Israel Antiquities Authority During the Beersheba pre-building survey, an extremely ancient advanced metal furnace for copper smelting and copper slag were discovered, said Talia Abulafia, site excavation director for the Israel Antiquities Authority.
The reverberatory furnace slag that has been discarded in the vicinity of the Bor Copper Smelter, Serbia, is currently processed by flotation at the nearby Bor Copper Concentrator. The copper recovery was rather low about 40 mainly due to the presence of oxide copper and insufficient mineral liberation. In our previous work, we
The electrode in the slag-resistance furnace is the central factor in the design and operation of the furnace by its role of conveying the smelting power. The obvious parameters are the size and positioning in the slag bath, which are defined by slag resistivity, furnace
Oct 04, 2020 The surprising finds include a small workshop for smelting copper with shards of a furnace a small installation made of tin in which copper ore was smelted as well as a lot of copper slag ...
Apr 09, 2010 Modern copper smelters use processed copper ore fed into a flash furnace, typically fired by oxygen which produces blister copper, being further processed in a converter furnace. Molten copper is poured from here into rectangular moulds, the resulting ingots subjected to electrolysis producing a metal of 99.9 purity. Copper can be recycled indefinitely without the base metal being
Converting Furnace C-Furnace Matte and flux limestone are reacted with oxygen-enriched air to form blister copper and then separated from the slag by difference of specific gravity. Slag Cu14 is returned to S-furnace, and blister copper is siphoned out and forwarded to Anode furnaces.
Jul 31, 2020 Pelletized blast furnace slag, in contrast to air-cooled and expanded blast furnace slag. Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about million tons of copper slag are generated annually in Korea.
World Mine Production and Reserves Because slag is not mined, the concept of reserves does not apply. World production data for slag were unavailable, but may be estimated as 25 to 30 of crude pig iron production and steel furnace slag as 10 to 15 of crude steel production. In 2019, world iron slag production was estimated to be
Copper slag is a by-product obtained during smelting and refining of copper. Copper smelting slag typically contains about 1 wt. copper and 40 wt. iron depending upon the initial ore quality and the furnace type. Main components of copper slag are
Copper Cobalt Nickel and Zinc Recovery conference, Victoria Falls, Zimbabwe, 16-18 July 2001 . Abstract. The 20 Mt reverberatory furnace slag dump at Nkana in Zambia contains a substantial quantity of cobalt. A 40 MW DC arc furnace has been built at Chambishi for the purpose of . recovering cobalt from the slag.
The copper slag cleaning in an electric furnace is based on slag reduction and settling of copper matte inclusions. Copper recovery depends on the slag temperature, degree of magnetite reduction and slag residence time. The formation of solid buildup on the furnace hearth leads to the decrease of furnace volume and slag residence time, affecting
copper, molten slag containing iron oxides plus gangue and flux oxides, and offgas. The slag typically contains as much as two percent copper. This slag can be recycled to the flash furnace, or its copper content can be recovered in a slag cleaning furnace, often electric. The flash furnace
nically entrained matte inclusions and dissolved copper. Copper recovery from the slag requires magnetite reduction to liberate matte inclusions and create conditions for co-reduction of dissolved cuprous oxide. Efficiency of copper recovery from the slag in an electric furnace depends on number of factors, such as slag composition and properties,
cess in the PV furnace. Many indicators of charge pro-cessing, the stability of the process and also the loss of copper with slag depend on its value. Table 1 shows that the content of iron sulfide in the charge is insufficient to maintain the heat balance of the furnace since the
The utility model discloses a double-furnace double-side blowing slag forming and top blowing copper making continuous converting furnace. The double-furnace double-side blowing slag forming and top blowing copper making continuous converting furnace respectively performs blowing processes in a slag forming period and a copper making period in a PS Pierce-Smith converter sequentially, and ...
US3351462A US430247A US43024765A US3351462A US 3351462 A US3351462 A US 3351462A US 430247 A US430247 A US 430247A US 43024765 A US43024765 A US 43024765A US 3351462 A US3351462 A US 3351462A Authority US United States Prior art keywords copper slag sulfide iron oxide Prior art date 1965-01-29 Legal status The legal status is an assumption and is not a legal
An innovative method was devised to improve copper recovery and operational efficiency of the Cu converter slag-cleaning furnace, by utilising both carbon and fluoride values of an otherwise ...
Copper slag and stainless steel slag of Electric Arc Furnace EAF are two typical metallurgical solid wastes, which contain a large number of valuables, such as Fe, Cr, and Cu. The transition metal elements in the waste slags, such as Cr and Fe, can be recycled as the coloring ions in the black ceramic tile. In this study, the FeCr molar ratio in the raw materials of copper slag and ...
Nickel-copper furnace and converter slag -200 kVA. During 1995, a campaign was undertaken on the 200 kVA furnace with the intention of combining furnace slag with the converter slag previously treated. When treating furnace slag containing 0.22 Co on its own, the maximum cobalt recovery that could be obtained was 66, with a cobalt value of 0 ...
Copper smelting slag is a solution of molten oxides created during the copper smelting and refining process, and about 1.5 million tons of copper slag are generated annually in Korea. The oxides in copper smelting slag include ferrous FeO, ferric oxide Fe2O3, silica SiO2 from flux, alumina AI2O3, calcia CaO and magnesia MgO. The main oxides in copper slag, which are iron oxide
Copper slag abrasive is suitable for blast cleaning of steel and stoneconcrete surfaces, removal of mill scale, rust, old paint, dirt etc. Suitable for SA-3, SA-2 and SA-2. Copper slag blasting mediagrit is manufactured of the granulated slag of copper refineries, and used for blast-cleaning of metal surface.
Aug 09, 2021 furnace slag, which slightly modify the liquid slag. domain at smelting temperatures and, e.g., increase the. ... on the slagmattecoppergas equilibria, the equilib-
Apr 20, 2021 Slag is a byproduct that is produced when smelting concentrated ore. ... Blast Furnace. Steel Bar x1 Slag x2 Iron Bar x2 Coal Tag x2 Quicklime x1 Advanced Smelting ... Bloomery. Iron Bar x3 Slag x2 Iron Concentrate x2 Smelting Level 1 4 100 2 Bloomery. Copper Bar x3 Slag x2 Copper Concentrate x2 Smelting Level 1 4 100 2 Blast Furnace. Gold Bar ...
Aug 16, 2021 Obtaining clinker from ladle slag is a more complicated technological task than obtaining pig iron from electric furnace slag. For this reason, the researchers first calculated the conditionsthe chemical composition of the mixture to be processed charge and the temperature rangerequired to produce clinker. ... Copper prices seem to be ...
The copper content of the slag is maintained at 0.5 to 0.6 percent Cu by maintaining a reducing atmosphere in the slag cleaning furnace. The slag then flows by gravity to the converter furnace. The converter furnace produces anode copper which flows to a holding furnace prior to anode casting. Slag from the con- verter furnace is granulated ...