slag granulation general

slag granulation general

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Aug 23, 2016  Abstract. Slag dumping and water granulation are the most commonly used slag treatment methods in the metallurgical industries. In both processes, water is present (by desire for cooling and dispersion or as a result of rain accumulation) and thus equipment and operations are designed to minimize and mitigate the risk of steam explosions resulting from the inappropriate contact of slag

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Some Fundamental Aspects of Dry Slag Granulation Process

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 as compared with conventional wet granulation process and the dynamics of slag droplet collision with solid surfaces will

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A granulator comprises a rotary atomizer on to which the molten material to be granulated is poured in a stream. The rotation of the atomizer causes the molten material to be ejected therefrom in the form of globules. No fluid jets are used to break up the molten material. The globules pass through an enclosure and partially freeze to form granules which are collected in an annular trough.

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Blast Furnace Slag Granulation at the Cast House – IspatGuru

May 05, 2013  Fig 4 Schematic diagram of a slag granulation plant. Granulation section – Here, the liquid BF slag is water quenched and solidified into small particles, eliminating the need for heavy crushing equipment. The liquid slag flows by runners from the BF to the granulation unit. From the runner, the liquid slag stream at around 1,500 deg C is poured into a high velocity water stream at the ...

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Further processing and granulation of slags with entrained ...

General slag granulation, on the other hand, is extensively applied, although in some cases crudely, with disastrous effects, as a result of not recognising the high heat capacities prevalent in slags. Thus, purpose-designed granulation and solidification processes are discussed, taking

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In general, increased fineness results in better strength development, but in practice, fineness is limited by economic and performance considerations and factors such as setting times and shrinkage. The specific surface area is changing from country to country. ... which occurs in blast furnace slag during the granulation process.

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Design and Operation of Dry Slag Granulation Pilot Plant ...

Feb 22, 2019  高达10%返现  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

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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).

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Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.Ground-granulated blast furnace slag is highly cementitious and high in CSH (calcium silicate hydrates) which is a strength enhancing ...

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Blast furnace slag granulation Climate Technology Centre ...

In many countries, slag is being used for cement production, such as in China, where nowadays, steel slag is a useful resource rather than a “waste”, since extensive applications of slag have been developed. In general, the estimated annual production level is 200 million tonnes and is dependent on the future iron and steel production ...

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Dry Slag Granulation: A Path to Improving the Safety and ...

Aug 23, 2016  Abstract. Slag dumping and water granulation are the most commonly used slag treatment methods in the metallurgical industries. In both processes, water is present (by desire for cooling and dispersion or as a result of rain accumulation) and thus equipment and operations are designed to minimize and mitigate the risk of steam explosions resulting from the inappropriate contact of slag

Read More
US20130292878A1 - Granulation of metallurgical slag ...

slag hot liquid metallic particles granulation cake 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.) Granted Application number US13/994,807 Other versions US9371571B2 (en ...

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Dry Granulation of Blast Furnace Slag Steel360 News

Apr 04, 2019  Dry slag granulation process is essentially to atomize the liquid slag and then to cool the particles rapidly so as to produce a glassy slag. Atomization is done using a rotary cup air blast atomizer (Fig 1). The particles cool as they travel through the air and are then cooled further in a fluidized bed. Both of these cooling processes provide ...

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Design and Operation of Dry Slag Granulation Pilot Plant ...

Feb 22, 2019  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

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The mineralogy of air granulated converter slag

Converter slag, also known as Basic Oxygen Furnace slag, is a by-product of steel-making that is produced in large quantities worldwide. It currently has few applica-tions, because the presence of free lime often prevents the use as aggregate, while the low reactivity makes it undesirable as a cement replacement. Air granulation is

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(PDF) The mineralogy of air granulated converter slag

In this study converter slag was separated into different fractions (0.25‐0.5 mm, 0.5‐1 mm, 1‐2 mm, 2‐4 mm) after air granulation to study the influence of size and therefore cooling speed ...

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Ground granulated blast-furnace slag - Wikipedia

Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.Ground-granulated blast furnace slag is highly cementitious and high in CSH (calcium silicate hydrates) which is a strength enhancing ...

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Tapping Hot Slag for Energy Primetals Technologies

Blast furnaces produce roughly 400 million tons of slag per year worldwide at a tapping temperature of around 1,500°C. Generally, wet granulation plants are used to cool down and process the material, using large quantities of water—it can take more than eight tons of water to treat one ton of slag.

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Current developments in the manufacturing and utilization ...

Nov 12, 2020  Formed from liquid blast furnace slag, it is a by-product of hot metal production in blast furnaces and thus of the steel manufacturing process. 65 % of all the steel manufactured worldwide comes from the blast furnace/LD converter while only 35 % is produced by the electric furnace process.

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

Aug 09, 2014  The slag product is used as an aggregate for the construction industry. Dry slag granulation using a rotary cup air blast atomizer. The dry slag granulation process is essentially to atomize the liquid slag and then to cool the particles rapidly so as to produce a glassy slag. The atomization is done using a rotary cup air blast atomizer.

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Device for the granulation of molten slag

(57) Abstract: Usage: in metallurgy, in particular to receive slag from metallurgical slag on prirechnyh installations. The inventive device for the granulation of molten slag containing trough 1 for the supply of the slag melt, a hopper 2 and the granulator 4, which consists of two headers with nozzles 5 and 6, the angle of intersection of the axes of the neighboring nozzles with the plane of ...

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Granulation performance by hybrid centrifugal-air blast ...

The general prediction correlation of granulated BF slag particles suitable for both the hybrid centrifugal-air blast technique and the usual centrifugal granulation technique, was established to optimize the process conditions, thereby improving the granulation performance.

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How to Make Cement From Blast-Furnace Slag

Apr 23, 2017  The general similarity in composition between Portland cement and iron blast-furnace slag very early attracted attention both in the cement and iron-smelting industries. ... but some of the sulphur was removed from the slag during granulation. This slag, when ground, had a tensile strength of 430 lb. per sq. in. at 28 days. ...

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Blast furnace slag granulation Climate Technology Centre ...

In many countries, slag is being used for cement production, such as in China, where nowadays, steel slag is a useful resource rather than a “waste”, since extensive applications of slag have been developed. In general, the estimated annual production level is 200 million tonnes and is dependent on the future iron and steel production ...

Read More
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).

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Northam Converter Dry Slag Granulation - Hatch Ltd

Following successful trials, in mid-2016 Northam contracted us for the basic engineering of a new dry granulation system for converting slag. This required Hatch to design new equipment suitable for use with platinum group metals (PGM) slag and entrained matte, which, based on our experience in this sector, needed to be different than what had ...

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Experimental investigation on molten slag granulation for ...

Jun 25, 2016  For three kinds of metallurgical molten slag granulation, molten ligaments formed around rotary cup edge, which was consistent with the results shown in Fig. 2. For blast furnace slag granulation and ferroalloy slag granulation, solid particles was almost uniform, as shown in Fig. 3(a) and (b). But the length of molten slag ligament in ...

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Stabilization of Stainless Steel Slag via Air Granulation ...

Feb 08, 2019  Water granulation of slag is a common practice in ironmaking and other industries in which slag streams are typically devoid of metal. Air granulation has been commercialized mostly for electric arc and basic oxygen steelmaking slags, with some penetration into nonferrous markets as well. ... In general, the high-basicity slags demonstrated ...

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Further processing and granulation of slags with entrained ...

General slag granulation, on the other hand, is extensively applied, although in some cases crudely, with disastrous effects, as a result of not recognising the high heat capacities prevalent in slags. Thus, purpose-designed granulation and solidification processes are discussed, taking

Read More
Granulated Blastfurnace Slag - Euroslag

Depending on different chemistry, granulation methods and granulation parameters the morphology of GBS particles can vary from a dense structure without porosity to a very porous friable form. In general the particle shape is sharp-edged with occasionally elongated needled shaped forms. Granulated Blastfurnace Slag Ground GBS 4900 cm²/g (LM)

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Effect of Water Granulation Conditions on Density and ...

Reducing the slag temperature to 1673 K or less is effective for adjusting the unit weight to 1.40 kg/l or more. Because the slag temperature is reduced to 1673 K or less in the new granulation system, the molten slag is granulated by blowing water after the slag is charged into the slag ladle.

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Ground granulated blast-furnace slag - Wikipedia

Ground-granulated blast-furnace slag (GGBS or GGBFS) is obtained by quenching molten iron slag (a by-product of iron and steel-making) from a blast furnace in water or steam, to produce a glassy, granular product that is then dried and ground into a fine powder.Ground-granulated blast furnace slag is highly cementitious and high in CSH (calcium silicate hydrates) which is a strength enhancing ...

Read More
Current developments in the manufacturing and utilization ...

Nov 12, 2020  Summary: Due to the necessity to reduce CO 2 emissions in cement making the partial substitution of cement clinker by granulated blast furnace slag (GBFS) has become established. This article deals comprehensively with the granulation process of GBFS as well as with the effects of the granulating process on the properties of GBFS.

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Granulation performance by hybrid centrifugal-air blast ...

The general prediction correlation of granulated BF slag particles suitable for both the hybrid centrifugal-air blast technique and the usual centrifugal granulation technique, was established to optimize the process conditions, thereby improving the granulation performance.

Read More
How to Make Cement From Blast-Furnace Slag

Apr 23, 2017  The general similarity in composition between Portland cement and iron blast-furnace slag very early attracted attention both in the cement and iron-smelting industries. ... but some of the sulphur was removed from the slag during granulation. This slag, when ground, had a tensile strength of 430 lb. per sq. in. at 28 days. ...

Read More
The mineralogy of air granulated converter slag ...

Oct 29, 2020  The three largest granulated slag fractions are very similar. The overall C 2 S content is the same (41 to 44 wt%), but the β-C 2 S content in the granulated converter slag increases with increasing granulated slag size fraction, while the α H ’-C 2 S decreases (from 28 to 22 wt%). This is likely an effect of the slower cooling of the larger slag fractions, which allows for the ...

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Reuse Technology for Slag Generated from Municipal Solid ...

Slag cooling technology suitable for each melt-ing system is used to produce slag. A water granulation method that enables simultaneous discharge and cooling of molten slag and molten metal is used in the high-tem-perature gasifying and direct melting furnace equipped with continuous slag

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