A sustainable waste utilisation, including metallurgical recycling and refined cleaning of the copper slag is considered a more preferred option than dumping or disposing it untreated in view of its potential economic and environmental benefits. The authors, in this study, have reviewed the generation mechanism, chemical/physical.
reducing metallurgical waste generation is through recycling. Metallurgical waste recycling has been successful in the ironmaking and steelmaking …
The comprehensive recycling of zinc and iron from smelting waste containing zinc ferrite (SWCZF) remains a challenge. A study is to be the first proposed that hazardous SWCZF is directionally converted with SO 2 for simultaneous recycling of zinc and iron. In the first step, zinc and iron phases in SWCZF were transformed into …
Slag in ironmaking and steelmaking processes has several metallurgical functions such as preventing contamination by atmosphere, providing thermal insulation, and removing impurities in the liquid metal. Slag as a mixture of oxide has specific …
Within the period of 2015–2017 at Nadezhda Metallurgical Plant (NMZ) the following new processing materials are tested to reduce pyrometallurgical slags: quartzite from the Shilkinsk deposit of Krasnoyarsk Territory (as a flux instead of overburden rock produced locally) and anthracites of various grades (as a reducing agent). The materials tested are …
The obtained data indicate (see Table 3) that, under a high extraction of iron in sinter (48.59%) and blast-furnace (64.29%) scrap, the total amount of extracted iron …
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 …
1. Introduction. Steel slag is the main solid waste generated in the steel-making process, accounting for 15 to 20% of crude steel output [1].China's crude steel output in 2021 was 1.035 billion tons [2], more than half of the global crude steel output (1.9505 billion tons) [3], and the steel slag output exceeded 120 million tons.In contrast, …
Steelmaking plants continuously strive to reduce the environmental load in the steelmaking process, resulting in the recycling of energy, water, and other byproducts. In this chapter, techniques for the treatment and recycling of metallurgical slags are described. Metallurgical slags are considered secondary raw materials and are used or …
The coal-based rotary kiln technology has become an increasingly mature ironmaking technology with iron-containing raw materials (Yi et al., 2022).The advantages of the rotary kiln process are: that the reducing agent is cheap, and the treatment products are very wide, such as iron smelting waste slag, vanadium titanium magnetite, etc.
3.2. Operation manner of the testing setup. The operating principle of the unit "reactor inversion phase-rotary kiln" is as follows (Fig. 2): excavated slag from hoppers is constantly fed into the rotary kiln, where it is heated to 900°С by waste gases of the reactor inversion phase (RIPh) and is routed into the same RIPh for slag melting, Zn distillation …
Because of its composition and unstable physical property, steel slag can rarely be used directly. Thus, it needs to be pretreated after taken out of the furnace. The pretreatment of steel slag is helpful for recycling the iron-containing components in steel slag. On the other hand, it can ensure the stability of slag composition and structure.
It is proposed that waste products formed at metallurgical plants be recycled by using the Romelt process – a continuous one-stage method of obtaining pig iron from iron-bearing raw materials in a slag bath with the use of abundant inexpensive grades of non-coking coals. Calculations are performed to determine the main economic …
Publisher Summary. Metallurgical slags play an important role in the extraction and refining of metals. They are formed when a flux material, added to or included in the charge, reacts with unwanted minerals during extraction or smelting, or with the products of the oxidation of unwanted solute elements during refining.
The current treatment technologies of chromium-containing metallurgical dust and slag by hydrometallurgy, the pyrometallurgical process, and the …
A generalized analysis of the data on the yield of slag processing products and the iron content of scrap and dump slag indicated the total amount of extracted iron (27.6%) to be significantly ...
Shipa S K. Department of (Electrical & Electronics Engineering) (Bapuji Institute of Engineering Technology) (Shamanur Road, Davangere, Karanataka 577004) Abstract:- The rapid development of metallurgical industry, leads to large amount of metallurgical solid waste. The slag, dust and sludge generated by integrated steel plants was called waste.
The metallurgical treatment of vanadium bearing slag has been conducted through the roasted-assisted leaching process on industrial scale, but the main problems that remain to be addressed are moderate vanadium recovery rate, high energy consumption, release of harmful gases such as CO 2, SO 2 and Cl 2, low degree of …
Firstly, the amount of waste slag to be disposed of is reduced; secondly, expensive chemical reagents required for water treatment are saved; thirdly, water resources, which are unfit for human ...
Integration consideration of end-point reproductions like molten slag waste heat high-efficiently recovery and resourceful disposal has a significant influence on establishing more economical and environmental wastes circular network system, due to 0.75billiontonne metallurgical slag with nearly 1500 °C is produced annually, …
Abstract. Copper slag, generated mainly during copper smelting, and classified as a potentially harmful waste, is an important secondary resource containing not only valuable metals, such as Cu, Fe, Zn, Co and Ni, in abundant quantities, but also hazardous elements, such as Pb and As. Hence, in response of its potential economic …
dust were enriched to above 30% of zinc content and about 5% of lead and could have been considered as valuable raw material in zinc metallurgical plant. The technical parameters of the melt and ...
The metallurgical recycling of iron and copper from copper slag mainly depends on a transformation from nonmagnetic iron components (fayalite) into …
Therefore, cement-free clinker concrete materials containing metallurgical waste slag have been extensively studied. Cui et al. used GBFS, steel slag, and desulfurization gypsum as cementing materials to prepare a clinker-free concrete. Ettringite (AFt) and C-S-H gels were formed through the synergistic effect of these solid waste …
This paper presents the latest overview of the environmental impact of wastes from the non-ferrous metallurgical industry.Ashes, slags and dusts – by-products from mining and metal processing – are sources of toxic metals, such as Pb, Cd, Hg, As, Al, as well as particulate matter.Physical, chemical and biological processes transform …
36.2.1 Test Raw Materials. In this test, iron tailings from Daguoshan processing plant of Ansteel Group Mining Corporation Limited were used. The particle size distribution is shown in Table 36.1, and the particle size was mainly distributed between 200 and 400 mesh.GBFS, SS and DG are produced by Anshan Steel Group, with specific …
containing waste water into the environment. AMD is ... The metallurgical dusts produced in the iron and steel. ... Al 2 O 3-MgO-SiO 2-Cr 2 O 3 system containing Slag cleaning and metal recovery ...
To prepare FePO 4 and to achieve resource utilization of metallurgical wastes, a collaborative treatment of P-bearing steelmaking slag and steel pickling waste liquor (SPWL) was proposed. The utilization of SPWL as a leachant for P separation from steelmaking slag facilitates P-removal residue recycling within steel plants, while also …
Microstructure of 0–0.4 mm fraction converter slag: (a) inclusions of metallic iron with dimensions of 0.06 and 0.18 mm, ×200, (b) inclusions of metallic iron with dimensions of 0.03 and 0.31 mm, ×100. Full size image. Steelmaking slag is used in blast-furnace charges at a number of foreign enterprises.
The issue of waste management and utilization in foundries and metallurgical plants covers a lot of completely different materials in various forms (solid, liquid or gaseous). ... slag etc.) are deposited on …
Large amounts of iron– and steelmaking slag and greenhouse gas are annually produced by the steel industry worldwide. Using Ca/Mg in the slag to capture and store the CO 2 via mineral carbonation is a promising approach to the reduction of waste emissions. Since iron– and steelmaking slags are a mixture of numerous types of …
A novel technology has been developed to recycle steel slag as a flux for the submerged arc welding process. The chemical, mechanical, and metallurgical properties of welds produced using recycled ...
Copper slag is a major waste produced in pyrometallurgical plants during the smelting and converting operations and has caused heavy environmental contamination. A pyro-hydrometallurgical process for the treatment of copper slag has been developed to accomplish recovery of nickel, cobalt, and copper and reuse of iron source.
Process waste, collected from sinter plant, blast furnace and steel melting shop of an integrated steel plant contain high mineral values especially iron around …
Monika Kasina. Jagiellonian University. Marek Michalik. Jagiellonian University. Abstract and Figures. The recovery of valuable metals from metallurgical slag disposals is a promising option to...
Abstract In connection with the development of copper and molybdenum production in Armenia, it becomes necessary to develop a technology for processing the slags of the functioning metallurgical plants to extract valuable metals from the slags. It concerns the copper slags of Alaverdi copper-smelting plant with a content of FeO …
