slag granulation emissions
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slag granulation emissions

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.

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

DRY SLAG GRANULATION WITH HEAT RECOVERY*

Dry Granulation Concept. Dry slag granulation is based on molten slag atomisation using a variable speed rotating cup or dish (see Figure 1). The slag is delivered on to the centre of the cup from a slag runner via a vertical refractory lined pipe. The rotation of the cup forces the slag outwards to the cup lip where it is atomised (see Figure 2).

Products › Ironmaking and steelmaking › Slag Granulation ...

The slag granulation plant comprises three sections: for granulation, dewatering and storage. In the granulation section, the liquid slag is ‘quenched’ by pouring onto it an excess water stream. The evaporated water will be condensed in a condensing tower located above the granulation tank.

RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A

2.2 Wet Slag Granulation Wet granulation is used in a number of smelters to handle BF slag. Wet granulation uses water to fragment and quench the molten slag. The slag is first granulated via launder granulation and tank granulation. In launder granulation, molten slag is granulated and quenched with pressurized water jets. In tank granulation ...

(PDF) Some fundamental aspects of the dry slag granulation ...

sulphur emission from the slag could be supp ressed through dry granulation with air, t hus avoiding sulphur emission to . the atmosphere through H. 2. ... Dry slag granulation (DSG) has the ...

Control of H2S Emissions During Slag Quenching

emission during the quenching of hard slag. Work done at Battelle by R. S. Kaplan1 directed toward the slag granulation process, could not be imple-mented in the field. The Battelle study attempted to reduce the oxygen de-ficiency in the slag by injecting steam into the molten slag and thereby sup-press H2S formation during quenching.

THE DRY BLAST- FURNACE SLAG GRANULATION AS

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 slag granulation arrangement installation at the metallurgical plants of Ukraine

Dry slag granulation: producing valuable by-products from ...

However, water granulation consumes large volumes of water and may generate acid mist causing air pollution. More importantly, the wet process does not recover the large amount of high-grade heat contained in molten slag. On cooling from around 1500 °C to ambient temperature, one tonne of molten slag releases about 1.8 gigajoules (GJ) of heat.

AISTech2018 Dry Slag Granulation – The Future Way to ...

Dry Slag Granulation – The Future Way to Granulate Blast Furnace Slag Fleischanderl A.1, Fenzl T. 2, Neuhold R. 3 1Primetals Technologies Austria GmbH Turmstrasse 44,

DRY SLAG GRANULATION WITH HEAT RECOVERY*

Dry Granulation Concept. Dry slag granulation is based on molten slag atomisation using a variable speed rotating cup or dish (see Figure 1). The slag is delivered on to the centre of the cup from a slag runner via a vertical refractory lined pipe. The rotation of the cup forces the slag outwards to the cup lip where it is atomised (see Figure 2).

RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A

2.2 Wet Slag Granulation Wet granulation is used in a number of smelters to handle BF slag. Wet granulation uses water to fragment and quench the molten slag. The slag is first granulated via launder granulation and tank granulation. In launder granulation, molten slag is granulated and quenched with pressurized water jets. In tank granulation ...

Control of H2S Emissions During Slag Quenching

emission during the quenching of hard slag. Work done at Battelle by R. S. Kaplan1 directed toward the slag granulation process, could not be imple-mented in the field. The Battelle study attempted to reduce the oxygen de-ficiency in the slag by injecting steam into the molten slag and thereby sup-press H2S formation during quenching.

Dry slag granulation: producing valuable by-products from ...

However, water granulation consumes large volumes of water and may generate acid mist causing air pollution. More importantly, the wet process does not recover the large amount of high-grade heat contained in molten slag. On cooling from around 1500 °C to ambient temperature, one tonne of molten slag releases about 1.8 gigajoules (GJ) of heat.

THE DRY BLAST- FURNACE SLAG GRANULATION AS

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 slag granulation arrangement installation at the metallurgical plants of Ukraine

Blast Furnace Slag Granulation at the Cast House – IspatGuru

May 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 ...

US9371571B2 - Granulation of metallurgical slag - Google ...

slag hot liquid cake granulation metallic particles Prior art date 2010-12-15 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related, expires 2032-12-20 Application number US13/994,807 ...

Hatch Ironmaking Technologies Dry Slag Granulation ...

Dry Slag Granulation. Water granulation is the most commonly used method to handle blast furnace slag and requires a granulation and a dewatering step to process the slag. In water granulation, the energy in the slag is lost from water evaporation and cooling and is difficult or impossible to recover.

Blast furnace slag granulation Climate Technology Centre ...

Cement is a global commodity, manufactured at thousands of plants. The industry is consolidating globally, but large international firms account for only 30% of the worldwide market. The principal and most visible market for cement is the construction industry in a multitude of applications where it is combined with water to make concrete. Most modern civil engineering projects, office ...

Slag recycling - recovery

The production volume was 20.7 Mta, of which 86.0 % was sand slag from slag granulation and 14 % was air-cooled BFS. From interim storage, 1.5 Mta was added to the production quantities, so that a total of 22.3 Mta of BFS was used in 2018. 17.9 Mta went into the production of cement and concrete, 4.0 Mta went into road construction and 0.4 Mta ...

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.

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.

Siemens and Baosteel cooperate in slag granulation ...

The agreement is exclusive for its agreed term. 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.

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.

Dry slag granulation: producing valuable by-products from ...

However, water granulation consumes large volumes of water and may generate acid mist causing air pollution. More importantly, the wet process does not recover the large amount of high-grade heat contained in molten slag. On cooling from around 1500 °C to ambient temperature, one tonne of molten slag releases about 1.8 gigajoules (GJ) of heat.

Control of H2S Emissions During Slag Quenching

emission during the quenching of hard slag. Work done at Battelle by R. S. Kaplan1 directed toward the slag granulation process, could not be imple-mented in the field. The Battelle study attempted to reduce the oxygen de-ficiency in the slag by injecting steam into the molten slag and thereby sup-press H2S formation during quenching.

Hatch Ironmaking Technologies Dry Slag Granulation ...

Dry Slag Granulation. Water granulation is the most commonly used method to handle blast furnace slag and requires a granulation and a dewatering step to process the slag. In water granulation, the energy in the slag is lost from water evaporation and cooling and is difficult or impossible to recover.

Dry Granulation of Blast Furnace Slag for Energy Recovery ...

Aug 09, 2014  This is also a good way to reduce CO2 emission because the cement manufacturing also produces large amount of CO2. To obtain glassy phase in BF slag, the liquid BF slag is subjected to water granulation process. Today rapid cooling of liquid slag in a closed water slag granulation plant is state of the art process.

Blast furnace slag granulation Climate Technology Centre ...

Cement is a global commodity, manufactured at thousands of plants. The industry is consolidating globally, but large international firms account for only 30% of the worldwide market. The principal and most visible market for cement is the construction industry in a multitude of applications where it is combined with water to make concrete. Most modern civil engineering projects, office ...

Dry Slag Granulation with Waste Heat Recovery

Dry Slag Granulation with Waste Heat Recovery 1. MINERALS DOWN UNDER NATIONAL RESEARCH FLAGSHIP Current Status Future Direction of CSIRO’s Dry Slag Granulation Process with waste heat recovery ICST 2012, Dresden, Germany: 1-3 October, 2012 Sharif Jahanshahi and Dongsheng Xie 2.

The mineralogy of air granulated converter slag

the low reactivity makes it undesirable as a cement replacement. Air granulation is a promising way to increase the reactivity of converter slag and enable recycling as a cement replacement and this is the first in-depth characterization of air granulated steel slag. In this study converter slag was separated into different fractions (0.25-

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.

Slag recycling - recovery

The production volume was 20.7 Mta, of which 86.0 % was sand slag from slag granulation and 14 % was air-cooled BFS. From interim storage, 1.5 Mta was added to the production quantities, so that a total of 22.3 Mta of BFS was used in 2018. 17.9 Mta went into the production of cement and concrete, 4.0 Mta went into road construction and 0.4 Mta ...

Environmental Guidelines for Nickel Smelting and Refining

slag granulation, but the majority should be recycled. Solid wastes and sludges The smelter contributes a slag that is a dense ... Emission Guidelines Emission levels for the design and operation of each project must be established through the Environmental Assessment (EA) process, based

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

Australian technology which harvests molten iron blast furnace slag and converts it into a granulated blast furnace slag make cement is being trialled in China where 60% of the world’s iron blast furnace slag is produced. The process is considered environmentally within metal production, called Dry Slag Granulation (DSG), reduces water use and cuts greenhouse gas emissions.

Low-emission Integrated Steelmaking Process

Aug 06, 2016  Low-emission Integrated Steelmaking Process (ISP) ISP has 3 components: a) Slow Autogenous Pyrolysis (SAP) for conversion of biomass to biochar and other valuable by- products (bio-oil, bio-energy) b) Use of Designer Bio-Char (DBC) as fuel and reductant in iron and steel making processes c) Dry Slag Granulation (DSG) to recover high grade waste ...

CN103261443B - The granulation of metallurgical slag ...

The granulation of metallurgical slag Download PDF Info Publication number CN103261443B. CN103261443B CN201180060869.XA CN201180060869A CN103261443B CN 103261443 B CN103261443 B CN 103261443B CN 201180060869 A CN201180060869 A CN 201180060869A CN 103261443 B CN103261443 B CN 103261443B Authority CN China Prior art keywords slag

Granulation TENOVA

Tenova Pyromet has vast experience in the design and construction of wet granulation plants. The wet slag granulation process involves pumping water into the slag cold runner via a blower box to quench the molten slag. The in-house designs have been proven in numerous applications and have shown to be both robust and reliable.

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