granulation slag heap
Flow Characteristics of the Liquid Film During Centrifugal Granulation
In addition, the slag flow rate is a state of turbulence after calculation. With regard to the simulation study of the liquid film flow on the surface of the rotary cups and the subsequent centrifugal granulation process, the present modeling work selected the model of SST k –ω Turbulence [].At the same time, considering the heat transfer effect in the …
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BOF Steel Slag: Critical Assessment and Integrated Approach for
During steel production, the impurities in the hot metal react with the fluxes forming the steel slag. Chemical constituents of this steel slag (SS) are relevant to iron/steelmaking or blended cement manufacture. Harmful impurities present in it, however, limit its recycling to these applications. Japan, Europe, and the US consume a significant …
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Centrifugal granulation behavior in metallic powder
The effect of size distribution of slag particles obtained in dry granulation on blast furnace slag cement strength. Powder Technol. 362, 32–36 (2020). Article CAS Google Scholar
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Design and Operation of Dry Slag Granulation Pilot Plant
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 quenched to become solid granules. The hot granules are fed to a counter-current moving packed bed heat exchanger, where they are further cooled and …
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Stabilization of Stainless Steel Slag via Air Granulation
Stainless. Argon oxygen decarburization. Dry granulation. In stainless steel production, slag from argon oxygen decarburization (AOD) converters is dumped on to the ground and then slowly cooled. The slag undergoes phase transformation from β-dicalcium silicate (β-C2S) to γ-dicalcium silicate (γ-C2S) at approximately 500 °C to 450 °C ...
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Dry slag granulation with integrated heat recovery
Dry slag granulation could make a fundamental change in slag treatment. In this new approach, molten slag is atomized under centrifugal forces on a spinning disc, …
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Dry Granulation of Molten Blast Furnace Slag and Heat …
Dry Granulation of Molten Blast Furnace Slag and Heat Recovery from Obtained Particles - Energy Technology 2012 - Wiley Online Library.
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Numerical Simulation of the Slag Granulation Process in Gas
In the heat recovery technology of molten slag granulation, gas quenching is one of the most promising and crucial technologies for high-quality resource utilization. This study performed numerical investigations on the slag granulation process through the realizable k-epsilon model and volume of fluid methodology and gained deep insight into …
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Experimental investigation on granulation characteristics …
The gas quenching dry slag granulation technique can successfully produces fine granules that meet the follow-up utilization and can effectively improve the waste …
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Heat Exchange in the Granulation Chamber of an Installation for Slag
Their yield is equal to 0.3–0.6 tons per 1 ton of cast iron. Liquid slags are released from the blast furnace at a temperature of 1400–1500 °C and contains significant amounts of sensible heat: 1600–1800 MJ in 1 ton of slag, which is equivalent to 55–61 kg of standard fuel [ 1, 2 ]. At present, a part of liquid blast-furnace slag is ...
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Hatch Ironmaking Technologies | Dry Slag Granulation | Abrasion
Hatch has developed two separate technologies: a pressure leak detection system (PLDS) and a soft sensor system. The PLDS uses supply/return valves and pressure meters installed on individual circuits to identify leaks. The system is automated to rapidly test circuits (~1 minute tests) and store historical data.
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Dry slag granulation with integrated heat recovery
PDF | On Jul 1, 2011, Sharif Jahanshahi and others published Dry slag granulation with integrated heat recovery | Find, read and cite all the research you need on ResearchGate.
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Simulation of ligament mode breakup of molten slag by spinning …
Recently, the spinning disk atomizer has been successfully applied to recover the high quality waste heat carried by molten slag, which is known as the dry slag granulation (DSG) method [4], [5]. Ahmed et al. [6] considered that the most attractive advantage for such atomizer is their ability to be fully applicable to low viscous liquid, high ...
ادامه مطلبGranulation and Heat Recovery from Metallurgical Slags
Slag. Granulation. Heat recovery. Energy. 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 ...
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Effect of process parameters on dry centrifugal granulation of …
The most suitable parameters for granulation are a slag flow rate of 5.1 × 10−5 m3/s, a disk rotating speed of 1500–2300 r/min, a slag falling height of 0.8 m and a smooth graphitic disk with the radius of 0.1 m. In the absence of an off-center flow, the overall best granulating effect produces round particles with mean diameter of 3.43 mm ...
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Some Fundamental Aspects of Dry Slag Granulation Process
Keywords: molten slag, dry granulation, heat recovery, kinetics, sulphur transfer, dynamic wetting and spreading. 1. Introduction . Each year hundreds of millions tonnes of slags are produced as byproducts of ferrous and nonferrous metallurgical - industries worldwide. These molten slags contain vast quantities of thermal energy and are usually ...
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Heat Recovery from Slag through Dry Granulation
granulation/heat recovery operation has been developed, shown schematically in Figure 4. In this process, the molten slag is first atomised in a dry granulator to produce fine slag droplets, which are
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Granulation and Heat Recovery from Metallurgical Slags
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. 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.
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Copper slag as a potential source of critical elements
slag. At present, the reprocessed slags comprise granulated fragments ranging in grain size from a few millimetres in diameter to predominantly powder-size due to granulation and/ or milling (Jarošítková et al., 2017; Figures 1, 2, 3). During sampling in 2018, the slag heap was divided into 20 equal sectors (approximately 1 000 m2). Each ...
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Dry slag granulation with integrated heat recovery
Different from the technology developed by steelmaking companies in Japan [4], Dry slag granulation (DSG) is a popular technology to recover heat from BF slags in China [35]. The process …
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Granulation and Heat Recovery from Metallurgical Slags
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 …
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Granulation ppt. | PDF
Granulation ppt. Jan. 27, 2013 • 0 likes • 169,978 views. Namdeo Shinde Follow. Assistant Professor at Department of Pharmaceutics. Health & Medicine. it includes types, process, production, equipments of granulation. advanced methods of granulation.
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Heat recovery in dry granulation of molten blast furnace slag
@article{osti_5610662, title = {Heat recovery in dry granulation of molten blast furnace slag}, author = {Tetsuro, N and Hiroshi, N and Koichi, F and Tsukio, I}, abstractNote = {In a research and development project undertaken jointly between Ishikawajima-Harima Heavy Industries Co. and Sumitomo Metal Industries, Ltd., a process has been developed for …
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Granulated Blast Furnace Slag
Granulated blast furnace slag having the composition within the following ranges generally meets the requirements for its use in making blast furnace slag cement. It should contain less than 1.0% Fe 2 O 3 and 1%–3% Na 2 O + K 2 O. Some uncertainty was raised in the past concerning the mobilization of sulphur present as sulphide in the slag, its …
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slag formation
The invention relates to a process for producing a foamed slag on austenitic stainless melts in an electric arc furnace, wherein a mixture of metal oxides and carbon is introduced into the furnace, underneath the slag and at the metal/slag boundary, the metal oxide is reduced by the carbon and the gases produced bring about the foaming of the slag by the …
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Wales needs £500m-£600m to make abandoned slag heaps safe
Heavy rainfall during Storm Dennis in February 2020 caused a 60,000 tonne landslide at an old slag heap at Tylorstown in the Rhondda valley. A later slide occurred at Wattstown in the same region.
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Experimental investigation on molten slag granulation for …
Abstract. Metallurgical slags, discharged at high temperature range, are produced as by-products in metallurgical processes. In order to reuse waste energy in …
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Dry slag granulation with integrated heat recovery
Dry slag granulation could make a fundamental change in slag treatment. In this new approach, molten slag is atomized under centrifugal forces on a spinning disc, and the droplets generated are quenched and solidified quickly using air, with simultaneous heat recovery. The process produces solid slag granules suitable for cement-making and hot ...
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Research status of centrifugal granulation, physical heat …
Each ton of BF slag carries approximately 1770 MJ of thermal energy, equivalent to the caloric energy in 0.058 tons of standard coal. Thus, there is 14.1 million …
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Opinion: Ode to a Slag Heap: Filmmaker Oleh Sentsov Amid the …
1 day agoAdjacent to the factory was the huge slag heap, known as Terrikon. The coke plant, built in 1963 to fulfil the needs of Mariupol's steel mills some 140 kilometers away, is the largest in Europe. Coke, a solid fuel made by heating coal in the absence of air so that the volatile components are driven off, is needed for smelting iron ore to make ...
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