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

Get PriceEmail contact

Blast Furnace Slag Granulation / Ironmaking / Our ...

BLAST FURNACE SLAG GRANULATION. 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 ...

Get PriceEmail contact

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).

Get PriceEmail contact

Blast Furnace Slag Granulation at the Cast House – IspatGuru

Fig 6 INBA process for slag granulation. 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

Get PriceEmail contact

Economic and environmental evaluation of slag dry

The combined avoided GHG emissions for dry granulation over wet granulation were 87 kg CO 2 e/t slag, and 867 kg CO 2 e/t slag compared to air cooling of slag. Calculation of these process credits...

Get PriceEmail contact

I, 2, I - FTTM ITB

Granulated slag can substitute for up to about 70 percent of the Portland cement, leading to significant energy saving and reduction in greenhouse gas emissions. Slag waste granulation in Indonesian steel plants has not been implemented, despite the facts that granulated slag

Get PriceEmail contact

Products › Ironmaking and steelmaking › Slag Granulation ...

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 for producing of a valuable raw material for a host of industries. The slag granulation plant comprises three sections: for granulation, dewatering and storage.

Get PriceEmail contact

(PDF) Heat Recovery from Slag through Dry Granulation

The compressive strength data, including SEM study, indicate that dry granulation slag can accelerate the hydration of slag cement in the next stage.

Get PriceEmail contact

Slag Granulation Emissions, Hot Products

Slag Granulation Emissions. Whatever your requirements, you 'll find the perfect service-oriented solution to match your specific needs with our help.We are here for your questions anytime 24/7, welcome your consultation.

Get PriceEmail contact

RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A PATH

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 treatment do not permit energy recovery. Furthermore, water is present in

Get PriceEmail contact

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).

Get PriceEmail contact

Dry slag granulation: producing valuable by-products

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.

Get PriceEmail contact

I, 2, I - FTTM ITB

Granulated slag can substitute for up to about 70 percent of the Portland cement, leading to significant energy saving and reduction in greenhouse gas emissions. Slag waste granulation in Indonesian steel plants has not been implemented, despite the facts that granulated slag

Get PriceEmail contact

Blast furnace slag granulation Climate Technology

Direct industrial energy and process CO 2 emissions amount to 6.7 gigatonnes (Gt), about 25% of total worldwide emissions, of which 30% comes from the iron and steel industry, 27% from non-metallic minerals (mainly cement) and 16% from chemicals and petrochemicals production (IEA, 2008).

Get PriceEmail contact

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.

Get PriceEmail contact

Granulated Blast Furnace Slag - an overview ...

Granulated blast furnace slag should contain calcium oxide (CaO), magnesium oxide (MgO), and silicon dioxide (SiO 2 ), the sum of which should account for at least two-thirds of the mass. The remaining third contains aluminium oxide (Al 2 O 3 ), with small amounts of other compounds.

Get PriceEmail contact

A review of waste heat recovery technologies towards ...

01-12-2013  For both the post-use of slag material and energy recovery, granulation is a critical step, which is directly related to the subsequent value of the slag particles and the heat transfer efficiency. Compared with the mechanical crushing and the air blast methods, the centrifugal granulation method should be highlighted considering its low energy consumption, simple and compact equipment.

Get PriceEmail contact

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 into other uses.

Get PriceEmail contact

DRY SLAG GRANULATION WITH HEAT RECOVERY*

Currently, the slag is granulated in wet-granulation plants using large volumes of water and to date, it has not been possible to utilise the remnant heat energy of the molten slag, which amounts to approximately 1.8 GJ of energy per ton. However, in an RD project currently underway led

Get PriceEmail contact

Dry slag granulation: producing valuable by-products

In some modern integrated steelworks, molten blast furnace slag is granulated using water jets — producing a glassy product that can be used as valuable feed in cement manufacturing by replacing ordinary Portland cement and significantly reducing the greenhouse gas emissions associated with concrete production.

Get PriceEmail contact

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.

Get PriceEmail contact

Dry Granulation of Blast Furnace Slag for Energy

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

Get PriceEmail contact

THE DRY BLAST- FURNACE SLAG GRANULATION AS RESOURCE

an alkaline element in slag is polluting the water; sulfide is emitted from slag into the air by the water quenching; the thermal energy of high temperature slag is wasted without recovery. To avoid these problems we should make use of leading country’s experience where the

Get PriceEmail contact

US9371571B2 - Granulation of metallurgical slag - Google ...

As this has to happen at ambient pressure, the temperature of the slag is immediately lowered to a temperature level of below 100° C. During the water granulation process, the sulfur contained in...

Get PriceEmail contact

I, 2, I - FTTM ITB

Granulated slag can substitute for up to about 70 percent of the Portland cement, leading to significant energy saving and reduction in greenhouse gas emissions. Slag waste granulation in Indonesian steel plants has not been implemented, despite the facts that granulated slag

Get PriceEmail contact

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 into other uses.

Get PriceEmail contact

Cutting-Edge By-Product Recycling for Iron- Steelmaking

In the Baosteel Slag Short Flow (BSSF) granulation process developed by Baosteel, the liquid slag is transferred to a granulation drum where it is treated with injected water with a dwell time between three and five minutes, which significantly reduces the amount of unreacted free lime.

Get PriceEmail contact

slag granulation description - LighthouseChristengemeente

Slag granulation Davy McKee (Stockton) Limited. Apr 25, 1995 The invention is particularly applicable to the granulation of slag tapped from an iron blast furnace. The granulated slag can be used as a Portland cement substitute in the manufacture of concrete. GB-B-2148330 discloses an apparatus and method for the granulation of slag.

Get PriceEmail contact