influence that each component of slag has on the losses of copper in slag-cleaning-furnace slag. Data used for the analysis are actual plant data collected over the past two years of operation. Facts obtained from the study will be helpful for smelter management to control these components in the flash smelting furnace
furnace (FSF) is treated in an arc furnace called slag cleaning furnace (SCF) to produce blister copper. The blister copper produced in this process is also laundered to an anode furnace for further refining and casted into anodes. The SCF slag is processed for copper-cobalt recovery to produce a copper-
reduction. Among them, these two interfacial chemical reactions, gas slag and gas carbon could ultimately limit the enhancement of these processes. In this work, the gas slag reaction kinetics in slag cleaning of copper slags has been studied. The dissociation rate of C02 on the surface of liquid copper …
LATEST RESULTS OF THE SLAG CLEANING REACTOR FOR COPPER RECOVERY 199 The slag velocity is similar. The results of CFD modelling (Figure 3 and 4) for a large furnace show very high slag velocities (up to 0.08 m/s) below the electrode at low magnetic field values (0.01 tesla). The second part of the channel furnace has a
Jun 06, 2019· Copper slag is a by-product created during the copper smelting and refining process. As refineries draw metal out of copper ore, they produce a large volume of non-metallic dust, soot, and rock. Collectively, these materials make up slag, which can be used for a surprising number of applications in the building and industrial fields.
Three launder-connected furnaces are used: a circular Smelting (S) Furnace, an elliptical Slag Cleaning (CL) Furnace, and a circular Converting (C) Furnace. The mixture of matte and slag formed in the S-Furnace flows continuously to the CL-Furnace, where the denser copper matte separates from the discard slag.
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 loss in the slag of Khatoonabad flash smelting furnace is estimated to be about 1–3 %. At present, the electric slag cleaning furnace is used for the recovery of copper from slag. However, due...
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 0.8–1.0 wt.%.
of compositions and temperatures directly relevant to the Slag Cleaning Electric Furnace. The liquidus temperatures in the tridymite and spinel primary phase fields at metallic copper saturation were measured for the fayalite-based slag with 2 wt% of CaO, 0.5 wt% of MgO and 4.0 wt% of Al 2O 3.
Slag Cleaning Furnace. In this furnace, copper rich oxide slags are melted in electric arc furnaces and coke & copper pyrite are added to reduce copper content in the slag. In order to increase reaction rate, slag is over-heated to produce low viscosity aggressive slag.
Great for cleaning reverb walls while avoiding affecting refractories Melts, softens oxides and dross-metal buildup for easier scraping Helps keep metal clean and enhances furnace performance
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
smelter in Zambia to install a six-in-line rectangular slag cleaning furnace of 12.5 MW downstream a continuously operating ISASMELT furnace3. The Matte Settling Electric Furnace (MSEF) is capable of processing copper matte, various converter slags, reverts from different sources and coke to produce a slag with a maximum copper content of 0.7%.
Improving Copper Recovery from Production Slags by Advances Stirring Methods Proceedings of EMC 2011 3 treated in the existing copper extraction route or separately in a subsequent reactor the slag phase can be used as construction material for example. 1.2 Conventional pyrometallurgical copper slag …
GHALSASI was chosen by Hindalco Industries -Unit Birla Copper (Aditya Birla Group), Gujarat to supply and commission a copper slag cleaning furnace (Technology provider - Mitsubishi Japan)
lining microstructure forming on water cooled steel surface in a high-silica, slag cleaning furnace slag of a direct-to-blister copper smelter is mostly glassy or amorphous. It contains 5-30 µm magnetite crystals, very small and larger copper droplets as well as small magnetite and silicate nuclei embedded in the glassy silica-rich matrix.
extensively investigated. 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 0.6 - 1.3 wt%, with most plants reporting copper losses in the discard slag in the range of 0.8 - 1.0 wt% [1-3]. The latter process has the advantage of ...
The matte is separated from slag by difference of specific gravity in the slag cleaning furnace. The matte is further oxidized to form blister copper (Cu: 98.5%) in the converting furnace.
depending on the method used to clean the final slag of the pyrometallurgical process. Eventually, minor amounts of zinc, molybdenum and noble metals such as gold and silver are presented. Since, final copper slag contain around 1% of copper, its recovery from the slag could be economically accepted if no expensive treatments are found, such as
Several of the metals contained in much of the scrap used in secondary copper smelting operations, particularly lead, nickel, and cadmium, are hazardous air pollutants (HAPs) as defined in Title III of the 1990 Clean Air Act Amendments. These metals will exist in the particulate matter emitted from
The ISASMELT furnace. An ISASMELT furnace is an upright-cylindrical shaped steel vessel that is lined with refractory bricks. There is a molten bath of slag, matte or metal (depending on the application) at the bottom of the furnace.
Outotec Slag Cleaning Slag cleaning at copper and nickel smelters is typically done using an electric furnace process. The design of Outotec slag cleaning furnaces is based on our extensive experience with different slag compositions and under-standing of how to …
Copper slag is a by-product created during the copper smelting and refining process. Copper slag is a by-product obtained during the production of copper metal, which can be used as pozzolana in the production of cementing materials. Recycling copper slag to recover metals has been focused on copper recovery.
With the Outotec Electric Slag Cleaning Furnace, the cleaning of smelting furnace slag is carried out using surface coke reduction in an electric furnace. The circular or rectangular electric furnace is operated in batches and equipped with three or more Söderberg electrodes.
RECTANGULAR FURNACE DESIGN AND REVOLUTIONARY DC-SLAG CLEANING TECHNOLOGY 241 PGM Platinum group metals (PGM) are mainly produced from sulphide nickel and copper minerals. After flotation and concentrate drying, raw material is smelted in large SAFs for separating the gangue and generating a base-metal-matte phase as a collector for noble metals.
Chemical slag cleaning process . The Metals in smelting and converting slags are present either dissolved, present mostly as ions (e.g. for copper slag as Cu + ions) or as entrained droplets of matte. The dissolved metals is associated eithe r with O. X- ions (i.e. Cu. 2. O) or with S. X-ions (e.g. Cu. 2. S). Electric furnace slag cleaning uses ...
Melts and softens oxides and dross-metal build-up for easier scraping. Its periodic use will keep metal clean of hard spots and furnace working at full capacity. The addition of Slag-Grip to the ladle or furnace will assist in removing the slag. Not for use in electric glow-bar furnaces.
Slag produced by flash furnace operations contains significantly higher amounts of copper than reverberatory or electric furnaces. Flash furnace slag is treated in a slag cleaning furnace with coke or iron sulfide. Because copper has a higher affinity for sulfur than oxygen, the copper in the slag (as copper oxide) is converted to copper sulfide.
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.
Cleaning copper spills De-bricking of MSEF furnace roof Removal of roof brick suspension members Installation of new members and alignment Installation of new roof bricks where necessary Demolition of furnace side and end walls up to the base of furnace Bricking of new side walls and the repair of the DR System where necessary
Sep 01, 2018· The characterization of two wastes, SWD and CFD, generated in the reprocessed of slag cleaning furnace flue dust from copper smelting have been performed as an essential step towards finding applications or treatments for these wastes. Both waste contain very fine particles size and are mainly enriched of Zn, Pb and Fe.
DC-arc furnace technology has been successfully applied to the recovery of cobalt, nickel, and copper from non-ferrous furnace and converter slags. Pilot-plant testwork at Mintek has demonstrated recoveries of 98% for nickel and over 80% for cobalt, at power levels of up to 600 kW.