the atmosphere through H 2S or acid mist, which could be a significant issue around water granulation plants. The CSIRO's Dry Slag Granulation (DSG) process is as a continuous two-step process ...
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To describe the heat transfer process of the slag particles in the granulation bin after flying out of the rotating cup, a two-dimensional computational model was developed in this study [18]. The air area was designed to be approximately 150 times larger than the area of the particles to promote effective convective and radiative heat transfer.
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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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Dry slag granulation (DSG) could make a fundamental change in slag treatment and deliver a more sustainable alternative comparing with the conventional water granulation process.
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In this paper, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag handling.
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CSIRO has been working on a dry granulation process, integrated with heat recovery, since 2002. It involves a rotary disc that atomizes molten slag to produce liquid droplets, which are rapidly ...
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Fig.3: Slag Granulation Plant Process The process of slag granulation involves pouring of molten slag through a high pressure water spray in a granulation head, which is located very close …
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practices, the developments in dry slag granulation over the last three decades, 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. Keywords: Dry slag granulation; Atomization; Energy recovery, Steam explosion.
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Request full-text PDF. ... The concept of the dry slag granulation process was proposed as early as the 1980s and has since been subjected to extensive studies [2][3][4][5][6][7][8].
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The iron and steel industry produces a waste product, slag. Dry Spinning Disc Granulation (DSDG) process has been experimentally tried, widely, for the granulation of Blast Furnace (BF) slag, with ...
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To solve the problem of difficult utilization of steel slag, the liquid steel slag was modified and the air-quenching granulation process was carried out to make steel slag into a value-added end ...
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Blast Furnace Slag Granulation Technology - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document summarizes blast furnace slag granulation plant technology. A modern blast furnace can produce over 1 million tonnes of slag per year. Slag granulation using water sprays is an established process that simplifies blast furnace operations and provides an …
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Fig. 3 displays the granulation contours of the liquid slag at several time points with or without blast air. At 40 ms, the liquid finger appeared first in hybrid granulation process, indicative of a stronger disturbance. Different time points with similar granulation morphologies are shown in Fig. 3 c–f, respectively. The earlier time ...
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the ferroalloy production process. Outotec Slag Granulation Typically, slag is granulated by using water sprays during tapping. Granulation is a cost-effective way to process slag for further usage. Because the granulation process uses water recycled from other water circuits in the plant, fresh water intake is minimized.
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The gas quenching granulation technique was first developed by Mitsu-bishi Heavy Industries and Nippon Kokan KK (now JFE) [12].In the early works, airflow velocity was less than 100 m·s −1 [13], which brought about two problems: one was that impact kinetic energy was not enough, the obtained slag particle diameter was larger (the average diameter is about 2–4 …
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slag has a lower value. For wet granulation, it is expected that a chloride/sulphate grade split of approximately 92/8 can be attained. For the block route, it is believed that a chloride/ sulphate grade split of 85/15 can be attained. In terms of the process complexity it is believed that wet granulation of the slag will be the simpler process ...
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Molten slags of blast furnace is a second resources with great value of 1600~1 800 MJ sensible heat per ton. At present, water-quenching process plays a leading role in recovering waste heat of the molten slags. However, this method not only cost lots of water, but also recover little sensible heat and can pollute the surrounding environment. Dry granulation process, as an …
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Request PDF | On Jun 5, 2015, Dongxiang Wang and others published Simulation of ligament mode breakup of molten slag by spinning disk in the dry granulation process | Find, read and cite all the ...
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Journal of Sustainable Metallurgy (2019) 5:181–194 183 1 3 1.2-m-diametergranulatorwasdesignedandconstructedto provetheconceptatCSIROinMelbourne.Thiscouldoper -
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Request PDF | Prediction on particle size characteristics of high-temperature liquid blast furnace slag in a centrifugal granulation process | The centrifugal granulation technique has the ...
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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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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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Metallurgical slags are produced at a massive rate of over 750 Mt/year, and carry a thermal energy equivalent to 40 Mt/year of coal. The potential mineral and thermal energy values of slags are in the order of $22 b and $3–6 b per year. Such attractive figures, together with tightening legislation on disposal of slag and the carbon footprint associated with the loss of …
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Request PDF | Effect of process parameters on dry centrifugal granulation of molten slag by a rotary disk atomizer | Dry centrifugal granulation (DCG) experiments for blast furnace slag (BFS) were ...
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Additionally, the bottom of the rotating cylinder atomizer (RCLA) was designed to contain several rows of holes from which the granulated BF slag can be squeezed out [54], as shown in Fig. 7 c. Mizuochi et al. [52, 64] experimentally investigated granulation process using different configurations of spinning disk and cup granulators and found ...
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The present paper covers some of the fundamental aspects of the reactions taking place during dry granulation of molten slag. In particular, the cut in sulphur emission from slag during DSG …
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The design and erection for Phase 2 pilot-plant at the site of voestalpine Stahl in Linz has been fin ished in May 2017 followed by a intense commissioning phase. Since Ju ne 2017 discontinuous batch campaign operation are executed to gain know-how and allow for process optimization for lat er commercialization of the process.. This paper su mmarizes the major results until …
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Process and Equipment Design for the Dry Slag Granulation Technology | 343 4 Process and Equipment for Dry Slag Granulation Technology Based on the results above, the process and equipment of DSG technology was de-signed by the author. The process was as follows. The BF slag was transported to the slag treatment plant by the slag tank.
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This paper focuses on an experimental study of dry slag granulation process using an analogue for BF slag (a mixture of rosin and paraffin wax). This analogue can be used to experimentally study dry slag granulation at a relatively low temperature of 130 °C compared to BF slag at 1500 °C. Different ranges of operating conditions in terms of ...
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granulation of slag melts (HVG) has been developed. It is shown that the main advantage of the proposed HVG process is the provision of forced high-speed vortex convection of water, with …
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