The research from Central South University presents a significant advance in metal recycling technology, particularly for copper, lead, and zinc recovery from copper smelting slag. Using pyrite as a sulfurizing agent, this novel sulfurization-reduction technique facilitates the efficient extraction of these metals.
The final category of copper scrap (paths (3), (3a) and (3′) in Fig. 18.1) is termed old, obsolete, post-consumer, or external arising scrap. It is obtained from products that have ended their useful life. Old scrap is a huge potential source of recyclable copper. It is also difficult to process. The challenges for processing old scrap include:
Actual annual slag production will follow the steel production quantities in a given year; however, the amount of slag processed can be either higher or lower, depending upon the use of historical slag piles or market conditions, where the demand for processed slag will determine the amount of slag sold.
With the shortage of high-quality raw materials and increasingly strict environmental regulations, the recovery of metals from copper slag and pyrolusite has become a research hotspot. A novel method for simultaneously extracting Mn and Fe from pyrolusite and copper slag has been proposed.
The reaction kinetic parameters and reaction mechanism of reduction process for copper slag were studied, which provided a theoretical basis for iron recovery from copper slag by reduction modification–magnetic separation. The effect of C/O ratio and CaO content on the reduction process of copper slag was discussed in non …
Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other elements which include iron, cobalt, silica, and alumina. Slag is a major problem in the metallurgical industries as it is dumped into heaps which have accumulated into millions …
Separating copper and arsenic has always been a major problem in the copper slag flotation process, which influences copper slag utilization and the environmental safety. A comparative study of flash smelting furnace (FSF) slag and its flotation products (concentrate and tailing) reveals the factors …
A comparative study of flash smelting furnace (FSF) slag and its flotation products (concentrate and tailing) reveals the factors affecting the separation of copper and arsenic in the beneficiation process from the perspective of mineralogy and morphology.
Prior to flotation the slag has to be ground to below 100 µm [8,55,77], where finer grinding leads to higher copper recovery [57, 179].
Copper slag, which is the waste material produced in the extraction process of copper metal in refinery plants, has low cost and its application as a fine aggregate in concrete production have many environmental benefits such …
In the new process, the waste ferric-oxide desulfurizer was employed not only as a sulfurizing agent to sulfurize and collect the copper lost in copper slag, but also as a reductant to reduce the ...
As an example of the application, the method was demonstrated for the analysis of behavior of minor elements in the Noranda Process producing metallic copper or high grade matte. The distribution of minor elements was expressed in terms of concentration ratios of an element for copper/matte, copper/slag and matte/slag phases.
In order to realize the high-value utilization of copper slag, a process for preparing Cu–Fe alloy through the reduction of copper slag is proposed. The sulfur in the alloy exists in the form of matte inclusions, which is different from sulfur ...
During the whole smelting process, copper smelter slag, nearly 30 million tons produced every year in the world, is outflowed for recycling, such as metal recovery, production of the high-value ...
The slag pile in Anaconda is a byproduct from the town's copper smelting history, and is part of the town's Superfund site. For over a half-century, companies have tried but often failed to ...
This work showed that metallurgical copper slag can be used as an efficient and more economical alternative material to iron oxides combined with ascorbic acid in the photo-Fenton like reaction to accelerate and upgrade the hydroxyl radical production for the degradation of antibiotics.
Slag buildup does occur on copper grating, but it is also removed much more easily than slag that builds up on mild steel slats. When a metal fabricator processes thicker material on the laser cutting machine with copper slats, it can expect to see spatter from the cutting process, but it is far less than it would be if the laser had steel slats.
Effect of ascorbic acid to improve the catalytic performance of metallurgical copper slag in the photo-Fenton type process for hydroxyl radical production applied to the degradation of antibiotics
The tailings slag produced from slag flotation process exhibits a leaching toxicity lower than the USEPA and SEPA regulatory thresholds. This work indicates the copper flash smelting process is promising for the efficient and safe disposition of As via recirculation processing of As-bearing byproducts.
For the resourceful recovery of secondary waste from retired lithium-ion batteries, a novel process of acid leaching-selective electrodeposition-deep decontamination-regeneration was proposed to recover CuS slag, and regenerate it efficiently with high-purity cathode copper and commercially available ternary precursors. A new pathway for solid waste …
In the copper flash smelting process, the copper content in the slag can be decreased by decreasing the Fe/SiO2 ratio and temperature.
Slag has a great appearance and is a low-cost alternative that conserves the environment. A slag driveway has higher strength and better adhesion, making it more durable than most materials. On the other hand, the limitations of slag are; that it's expensive to acquire, it can be toxic, and it has a high swelling potential.
The main source of copper loss from a smelter is copper in discard slag. Slag can contain Cu in concentrations very much higher than those of many ores. Cu is present in slag entrained in very small drops of matte, white metal and blister copper occluded in fayalitic phase. In this work, the technical viability of the BRISA process, …
This paper presents results from an experimental investigation carried out to study the potential use of copper slag as fine aggregate on the strength of both normal and high strength concrete. Concrete mixtures were prepared using different proportions of copper slag as partial and full replacement of fine aggregate. The percentage of copper slag …
Copper slag is a by-product of the copper smelting process. One ton of refined copper produces 2–3 tons of copper slag, resulting in a total yearly production of 4.5 million tons, and an accumulated volume of 50 million tons [ 9 ]. Granulated copper slag (GCS) is often utilized in SCMs owing to its pozzolanic activity [ 10 ].
Abstract. Slag is a waste product from the pyrometallurgical processing of various ores. Based on over 150 published studies, this paper provides an overview of mineralogical and geochemical characteristics of different types of slag and their environmental consequences, particularly from the release of potentially toxic elements …
The flux addition level was shown to have relatively less impact on the process performance if these are maintained at an adequate level. The work established that the copper slag, a waste material, can be successfully processed to generate reusable products through pyrometallurgical processing.
Copper slag is a metallurgical waste that is disposed by way of stockpiling at designated dump sites within a mining site. The observed depletion of high-grade iron ores in Botswana and the environmental hazards associated with disposal of untreated metallurgical waste, presents an opportunity for research on secondary sources of iron …
This paper studies the carbon reduction and magnetic separation of copper slag's flotation tailings. The impact of the roasting temperature and alkalinity on the reduction and effect of different size of reduzate on magnetic separation are investigated. The results show that Fe3O4 and fayalite are the main forms of iron among the …
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.
