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Among the dry granulation methods, centrifugal granulation has become the most promising method for waste heat recovery of molten slag because of its many advantages. Normally, the discharged molten slag is poured onto the surface of a rotary atomizer, and then the liquid film is formed and gradually moves to the edge of the rotary atomizer.
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The technogenic copper deposit of slag Depo 1 is located in the industrial district of the Smelter and Refineries of RTB Bor. Exploitation reserves are 9 190 940 t of slag with the average copper content of 0.715%. Sample of this deposit was melted in a furnace and then cooled with a jet of water when it was poured into a thin jet, whereby the ...
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The technological factors required to improve the operational properties of granulated metallurgical slags demanded in the building industry have been analyzed. In order to satisfy these factors, a new technology for hydro-vacuum granulation of slag melts (HVG) has been developed. It is shown that the main advantage of the proposed HVG process is the …
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Blast furnace slag obtained from water quenching is generally used for cement production. However, harmful waste, such as SO 2, H 2 S and heavy metals, is discharged into the surrounding environment after water quenching. Dry granulation is an environmentally-friendly treatment, and the performance of dry granulation slag cement is investigated in the study.
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introduce the Ecomaister-Hatch dry slag granulation process, and elaborate on future applications of the technology in the processing of argon oxygen decarburization and blast furnace slags.
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Fayalite is the main phase of copper slag and a type of Fe silicate glass that is composed of a polymerized network of silicate tetrahedrons, in which SiO 2 and FeO are generally considered as network formers and modifiers, respectively. The structure of fayalite is shown in Fig. 13 [107].In iron silicate glass, O 2− exists in the form of bridging and non-bridging oxygens (BOs and …
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Here we review common slag handling practices, the developments in dry slag granulation over the last three decades, introduce the Ecomaister-Hatch dry slag granulation process, and...
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Granules High Quality Granulated Copper Slag, For Surface Blast-Cleaning ₹ 350/ Metric Ton Get Latest Price. Material. Copper. Form. Granules. Usage/Application. Surface Blast-Cleaning. Color. Black. ... Dry Slag Granulation (DSG) Blast Furnace Slag Operation; Granulated Blast Furnace Slag (GBS) Show More Videos V Related Category. Fly Ash ...
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As a result of extensive R&D in this area, the slag-processing technologies are slowly converging around dry granulation combined with heat recovery. In this paper, the slag …
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RD spectra of dry granulated slag resulting from pilot-scale test (2.5 kg) at 1450°C/1600 rpm. Note the high glassy content of the granules (average ~97 per cent), as indicated by the amorphous ...
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Paul Wurth has approached the topic of dry slag granulation with a simple but effective method in which steel spheres and liquid slag are mixed to achieve fast cooling of the blast furnace slag ...
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11ügranulated slag Figure 2. INBA process. 4 Dry granulation process On the blast furnace slag treatment technology, for a long time, water quenching process has token the leading position. However, there are many defects of water-quenching slag method, which can be roughly concluded as follow: a mass of sensible heat unrecovered, high
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Attempts to recover energy from metallurgical slags have faced a fundamental constraint that is the low thermal conductivity of slag, ranging from 1 to 3 W m −1 K −1 for solid to 0.1–0.3 W m −1 K −1 for molten slags at 1400–1500 °C [6], [27], [28]. This explains why the core of a slag pot cooled in air remains liquid for days.
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The fayalite-type slags produced by the copper/nickel smelting and converting processes are not cementitious, and their uses include abrasive material for sandblasting and ball milling. ... The next work by Cooksey et al. provides an overview of the design and operation of a dry slag granulation pilot plant at CSIRO. This overview covers some ...
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One of the key measures for a sustainable metallurgical industry is to convert high volume slag waste into valued products. Dry granulation of slags using a rotary disc[1-6] is an emerging...
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Dervis Ozkan et al. / Materials Today: Proceedings 11 (2019) 516â€"525 519 Liu et al. reported that, significantly low thermal conductivity of molten slag can be overcome through enhancing the rotational speed in dry slag granulation process to obtain improved heat transfer between slag particles [34].
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In the dry centrifugal granulation process to treat liquid blast furnace slag, it is critical to clarify the cooling and crystallization characteristics of slag particles, which greatly determine their subsequent reutilization and waste heat recovery. ... Co-treatment of spent carbon anode and copper slag for reuse and the solidification of the ...
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Molten slag is often considered as a waste material when it is cast into slag pits. INBA slag granulation and dewatering system is the proven route for converting molten slag into a value added product for the cement industry. The INBA system comprises two main components – the granulation unit which utilizes a granulation
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Since the 1970s, research on dry granulation of blast furnace slag with waste heat recovery has been carried out to improve energy efficiency and overcome the environmental problems caused by traditional slag treatment methods in the iron and steel industry (Duan et al., 2022a, Duan et al., 2022b).Dry granulation with waste heat recovery technologies includes the …
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Some Fundamental Aspects of the Dry Slag GranulationProcess . Sharif Jahanshahi*, Yuhua Pan and Dongsheng Xie . CSIRO Minerals Down Under National Research Flagship, Clayton, Victoria, 3168, Australia . Abstract: There is a growing interest in development of a dry slag granulation (DSG) process so as to recover the
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T1 - Dry Slag Granulation - Investigations on the Behaviour of Liquid Blast Furnace Slag in Combination with Heat Recovery. AU - Kofler, Markus. N1 - no embargo. PY - 2014. Y1 - 2014. N2 - Blast furnace slag is well known as by-product of hot metal production in integrated steel and iron mills. About 300 million tons of this slag is produced ...
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This study investigated the size distribution of slag particles obtained from the dry granulation of molten slag. In addition, the effect of using the slag obtained from dry granulation in slag cement blends was analyzed. All the results showed that there was a wide size distribution range of blast furnace slag particles in ligament formation.
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In order to increase the contact time between slag and copper cooling rollers, the direction of rotation was chosen to turn outwards, so that not one but two strands of slag plates are created, one on each roller. ... Mostaghel S, Lee SK, Oh SY (2016) Recent developments in commercial scale dry slag granulation and energy recovery. AISTech ...
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Abstract: There is a growing interest in development of a dry slag granulation (DSG) process so as to recover the sensible and latent heats from molten slags and convert iron blast furnace …
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Dry granulation is realized by air, which effects on a slag melt jet and provides its comminution. Granules fly several meters and then are subjected to cooling, solidified and entered into …
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In: Con- 7 crete international. American Concrete Institute, p 11 40. Jahanshahi S, Xie D (2012) Current status and future direction of 17. Das B et al (2010) Characterization and recovery of copper CSIRO's dry slag granulation process with waste …
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Granulation characteristics of copper slag were studied ... The gas quenching dry slag granulation technique is one of the most promising slag treatment methods due to realize efficient waste heat ...
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Key words: slags, dry slag granulation, heat recovery. 1. Introduction The steel industry produces hundreds of millions of tonnes of molten slags each year which are currently cooled with air or ...
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FIG 2 - Pilot-scale dry granulation (atomization) apparatus, with raised induction furnace (housing graphite crucible). Slag is tapped below onto a rotating copper disc, and the solidified slag ...
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Several external applications for copper slag have been ... (99.99 % K 2 SO 4) on a dry basis. The amount of potassium sulfate was ... the need for controlled studies on the effect of chemical composition on the inherent reactivity of iron silicate copper slags. The granulation experiments using iron crucibles indicated that iron silicate slags ...
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Dry Slag Granulation," DMR 3052, Confidential Report, CSIRO Minerals, 2006. Title: 2 page paper summary Author: Sharif Jahanshahi Subject: CSRP Conference Created Date:
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Wet granulation Dry granulation Fig. 18 Comparison of estimated capital and operating costs for the integrated dry slag granulation and heat recovery process with conventional wet granulation for ...
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Molten slag is broken up by supersonic air into droplets through the air quenching dry slag granulation technique. The breakup process of blast furnace slag directly determines the droplet diameter and the waste heat …
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For slag handling to become inherently safe, our industry must eliminate the potential contact of water with molten slag. This is today feasible with the advent of dry …
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As the largest output of solid waste in the ISI, the production of blast furnace slag (BFS) by the blast furnace method exceeded 1.279 billion tons with extremely high temperature of 1500–1600 ℃ based on the global iron production estimation in 2022 (Duan et al., 2024b).The slag contained total residual waste heat of 7.55×10 8 GJ, equivalent to 27.77 million tons …
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Traditionally, metallurgical slags have been air cooled in slag pots or large yards. Slag pot cooling is a slow process thus allowing crystallisation of various mineral phases as well as separation of metallic and matte phases into droplets. The slag that is poured into pits is cooled by air … See more
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