slag granulation emissions

slag granulation emissions

Slag Granulation with Continuous Dewatering Ironmaking

Slag Granulation with the INBA Dewatering System 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 tank with integrated ...

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Some Fundamental Aspects of Dry Slag Granulation Process

sulphur emission from the slag could be suppressed through dry granulation with air, thus avoiding sulphur emission to the atmosphere through H. 2. S 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 -step prtwo ocess as shown in Figure 1. The molten slag is first atomized using a spinning disc ...

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Blast Furnace Slag Granulation at the Cast House – IspatGuru

05/05/2013  Emissions during the slag granulation process. BF slag has S content of around 1 %. It can go upto 2 % depending on the S content of the coke and coal. The major S compound is calcium sulphide (CaS) and during granulation gaseous S compounds are generated and emitted. These consist mainly of hydrogen sulphide (H2S) and sulphur di-oxide (SO2) according to the simplified reaction

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Blast Furnace Slag Granulation / Ironmaking / Our ...

Slag handling is an important aspect of modern blast furnace operation. Today, blast furnace slag is a saleable product (granulated slag sand used as CO 2-friendly substitute of clinker in cement production) rather than a difficult and costly waste material.Paul Wurth has developed the INBA ® slag granulation process, incorporating our proprietary dynamic INBA dewatering drum.

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DRY SLAG GRANULATION WITH HEAT RECOVERY*

condensation systems can prevent the emission of water vapour containing sulphur. • When slag is quenched with water, the high energy potential of liquid slag is wasted to heat and evaporate water. For granulation, the circulated water has to be re-cooled in cooling towers or with other cooling methods. Mainly cooling towers are equipped with electrically operated fans and also the cooling ...

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(PDF) Heat Recovery from Slag through Dry Granulation

Dry granulation is an environmentally-friendly treatment, and the performance of dry granulation slag cement is investigated in the study. The results demonstrated that the particle size ...

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THE DRY BLAST- FURNACE SLAG GRANULATION AS RESOURCE

So the dry blast-furnace slag granulation arrangement application can dissolve such problems: the dry even sized high density granules receiving for the cement manufacture; the environmental improvements as the sulphur gas . emission are reduced and there isn’t polluted water discharge and vapour plume; the heat recovery from the molten blast furnace slag. Consequently, the dry blast-furnace ...

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Products › Ironmaking and steelmaking › Slag Granulation ...

Slag Granulation Systems Efficient blast furnace slag granulation contributes to low-cost hot metal and turns a residue into a resource . 10/115. A modern blast furnace can produce more than a million tons per annum of slag. Slag granulation using water sprays is now an established technology that not only simplifies blast furnace casting floor operations but also provides an economical route ...

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(PDF) Heat Recovery from Slag through Dry Granulation

Dry slag granulation at a spinning disc Key Results/Findings A conceptual flowsheet has been developed in the 1 st year (by June 2007) of the project based on process modelling and focused ...

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RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A PATH

RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A PATH TO IMPROVING SAFETY AND SUSTAINBILITY OF THE METALLURGICAL SECTOR* Santiago Faucher1 Sina Mostaghel2 Lily Lai Chi So3 Sang Yoon Oh4 Abstract Molten slag from pyrometallurgical furnaces is tapped at high temperature, carrying a large amount of thermal energy. But the common slag dumping and water granulation methods used for slag

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DRY SLAG GRANULATION WITH HEAT RECOVERY*

condensation systems can prevent the emission of water vapour containing sulphur. • When slag is quenched with water, the high energy potential of liquid slag is wasted to heat and evaporate water. For granulation, the circulated water has to be re-cooled in cooling towers or with other cooling methods. Mainly cooling towers are equipped with electrically operated fans and also the cooling ...

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THE DRY BLAST- FURNACE SLAG GRANULATION AS RESOURCE

So the dry blast-furnace slag granulation arrangement application can dissolve such problems: the dry even sized high density granules receiving for the cement manufacture; the environmental improvements as the sulphur gas . emission are reduced and there isn’t polluted water discharge and vapour plume; the heat recovery from the molten blast furnace slag. Consequently, the dry blast-furnace ...

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Products › Ironmaking and steelmaking › Slag

Slag Granulation Systems Efficient blast furnace slag granulation contributes to low-cost hot metal and turns a residue into a resource . 10/115. A modern blast furnace can produce more than a million tons per annum of slag. Slag granulation using water sprays is now an established technology that not only simplifies blast furnace casting floor operations but also provides an economical route ...

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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 finally discharged at close to ambient temperature.

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Odoriferous nuisances in steel industry: emissions at the ...

As far as granulation itself is concerned, the technique adopted is that of controlling the temperature of the quenching water. Similarly, maintaining the right ratio between slag rate and water rate also helps reduce emissions. Slag temperature (extrapolated from the molten iron temperature) also has an effect, but is less easy to control.

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Siemens and Baosteel lend a hand for slag granulation ...

In Baosteel’s BSSF granulation process, the liquid slag is moved to granulation drum for treatment with injected water having dwell time between 3-5 minutes that reduces the unreacted free lime amount. To avoid emissions of dust hazardous substances, the hermetically sealed vessel and central vapor extraction system are used. This process ...

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Slag recycling - recovery

The three most important trends for slag recycling relate to further investments in granulation plants for blast furnace slag, the increase in slag trading with separate slag grinding plants and the increasing use of steelworks slag as an additive for the concrete industry. There are various processes on the market for the granulation of blast furnace slag. The most important process is ...

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Siemens and Baosteel cooperate in slag granulation ...

Siemens already offers solutions for slag granulation from pig iron production in blast furnaces. Slag from steel production in BOF (LD) converters and electric arc furnaces can, for example, be used as material in road or railway track bed construction. In the BSSF granulation process developed by Baosteel, the liquid slag is transferred to a granulation drum where it is treated with injected ...

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RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A PATH

RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A PATH TO IMPROVING SAFETY AND SUSTAINBILITY OF THE METALLURGICAL SECTOR* Santiago Faucher1 Sina Mostaghel2 Lily Lai Chi So3 Sang Yoon Oh4 Abstract Molten slag from pyrometallurgical furnaces is tapped at high temperature, carrying a large amount of thermal energy. But the common slag dumping and water granulation methods used for slag

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Dry slag granulation: producing valuable by-products

Our sustainable, dry method for slag granulation derives value from waste and has the potential to transform the metal and cement industries.

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THE DRY BLAST- FURNACE SLAG GRANULATION AS RESOURCE

So the dry blast-furnace slag granulation arrangement application can dissolve such problems: the dry even sized high density granules receiving for the cement manufacture; the environmental improvements as the sulphur gas . emission are reduced and there isn’t polluted water discharge and vapour plume; the heat recovery from the molten blast furnace slag. Consequently, the dry blast-furnace ...

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Economic and environmental evaluation of slag dry

This integrated dry slag treatment process has the following potential water and energy (and therefore economic) savings over wet granulation: - no water for granulating slag required; - no drying of granulated slag required; - recovered waste heat can be used to replace fossil fuel-based energy sources. Furthermore, the process also has potential for reducing greenhouse gas (GHG) emissions ...

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INBA process for slag granulation - Technische ...

The implementation of the granulation basin reduces the solidification time of the slag, the sulphurous emissions and the slag sand product can be improved. The granulation basin allows the introduction of a sealing hood as a barrier to 'false air', besides additional benefits e.g, higher resistance to wear, reduced height design, reduced pipe investment due to less water flow in the circuits ...

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‘Dry’ Granulation of Slags for Producing Cement Binder ...

Global cement production accounts for about five per cent of man-made CO2 emissions (WBCSD, 2002). Such operating practices will increasingly be considered unsustainable, unless significant reductions in environmental impact can be realised by the industry. Slag is a high volume waste product from ironmaking, with about 300 kg of slag being produced per ton of...

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China adopts Australian (CSIRO) dry slag granulation ...

The process is considered environmentally within metal production, called Dry Slag Granulation (DSG), reduces water use and cuts greenhouse gas emissions. An agreement between CSIRO and the Beijing MCC Equipment Research Design Corporation Ltd is a landmark in Australia-China research collaboration, according to CSIRO Director of the Mineral Resources Flagship, Jonathan Law. “Our ...

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Thermodynamic Study of Energy Consumption and Carbon ...

05/04/2021  CO2 emissions of the BF process are around 1.650 t CO2/tHM [4], ... dry slag granulation including heat recovery, high-efficiency coal injection technology (PCI), top gas dry residual pressure power generation (TRT), hot BF flue gas double pre-heating technology, BF gas recovery technology, BF slag comprehensive utilization tech-nology, BF coke oven gas injection technology, BF waste plastic ...

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Granulation TENOVA

The granulation plant converts molten iron from the Corex plant into solid granules, which permits the iron to be sorted in manageable form. The only emission resulting from the process is water vapour. The iron granules are produced from excess iron produced in the Corex unit. The production of iron is the first stage in the process to produce hot rolled coil at Saldanah Steel.

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Slag recycling - recovery

The three most important trends for slag recycling relate to further investments in granulation plants for blast furnace slag, the increase in slag trading with separate slag grinding plants and the increasing use of steelworks slag as an additive for the concrete industry. There are various processes on the market for the granulation of blast furnace slag. The most important process is ...

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