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slag granulation process pdf

Slag Granulation with Continuous Dewatering Ironmaking

second granulation tank, one granulation unit can handle the slag of two tap holes. `Continuous filtering and evacuation of dewatered slag sand up to its storage facility without inter-ruptions for purging. ` High reliability. `Measurement of slag flow, due to the design of the drum and the dewatering process.

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DRY SLAG GRANULATION WITH HEAT RECOVERY*

The wet granulation process operates with a high water to slag ratio of about 8:1. This wet process is quite accepting to fluctuations in the quantity and properties of the slag, however the wet process has the following drawbacks: • Despite mechanical dewatering in drums, silos or heaps, a residual moisture of

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Some Fundamental Aspects of Dry Slag Granulation Process

granulation process and the dynamics of slag droplet collision with solid surfaces will be covered. Published studies on the thermodynamics of sulphur in slags and kinetics of sulphur transfer between blast the furnace slags and oxidising gas mixtures have been reviewed to ascertain the effects of oxygen ial pressure on part

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RECENT DEVELOPMENTS IN DRY SLAG GRANULATION: A

slag hauling and production of higher value by-product. Wet granulation allows for fast quenching of molten slag and production of high value glassy material, which, for BF slag, demonstrates desirable cementitious properties post milling. BF slag is typically devoid of metal, making water granulation a manageable process from a safety perspective.

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Granulation of titania slag - SAIMM

slag has a lower value. For wet granulation, it is expected that a chloride/sulphate grade split of approximately 92/8 can be attained. For the block route, it is believed that a chloride/ sulphate grade split of 85/15 can be attained. In terms of the process complexity it is believed that wet granulation of the slag will be the simpler process ...

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{Study on mineralogical crystallization of granulation of ...

Abstract: The process of granulation in blast furnace slag (BFS) by gas q uench-ing can effectively recover the waste heat of BFS and improve the value-added nature of the BFS byproduct. With decreasing temperature, BFS crystallizes into melilite, anorthite, spinel, etc. Mineral crystallization, however, is not conducive

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Converting Granulated Blast Furnace Slag into Fine Aggregate

The developed conversion process involves improving the physical properties in two stages. Stage 1: Altering granulation parameters Slag Granulation is primarily affected by water temperature, water pressure and water flow rate. When the material solidifies under slow cooling conditions, escaping gases leave behind micro pores in the cooled mass.

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(PDF) Granulation and Carbonization Process of Titanium ...

The experimental process was divided into two parts, dry granulation of TBF slag and carbonization of TBF slag. A s for dry granulation process, the TBF slag in weight of 200 gram was

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CN102329900B - Liquid steel slag dry-process granulating ...

The invention relates to a liquid steel slag dry-process granulating device and a sensible heat recovery method. The liquid steel slag dry-process granulating device comprises a feeding device, a dry-process granulator, a cyclone separator and a sensible heat recovery device, wherein the dry-process granulator, the cyclone separator and the sensible heat recovery device are mutually communicated.

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Granulated Blast Furnace Slag - an overview ...

When producing such cement, slag is usually the hardest to grind, and it forms the coarsest portion, while the cement is ground the finest [9]. A potential problem is moisture, which occurs in blast furnace slag during the granulation process.

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

The wet granulation process operates with a high water to slag ratio of about 8:1. The advantage of the wet process is that it is accepting wide fluctuations in the mass flow and physical/chemical properties of the slag. However, the wet process faces also significant disadvantages:

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THE DRY BLAST- FURNACE SLAG GRANULATION AS

Slag treatment is the main ecological problem of the modern Ukraine metallurgy manufacture. The blast-furnace slag is the by-product of the ironmaking process. It has produced in the blast-furnace in the amount of 300 kg per tonne of pig iron. Now in Ukraine the blast-furnace slag is treated by impinging much water for granulation. This ...

More

Granulation of titania slag - SAIMM

slag has a lower value. For wet granulation, it is expected that a chloride/sulphate grade split of approximately 92/8 can be attained. For the block route, it is believed that a chloride/ sulphate grade split of 85/15 can be attained. In terms of the process complexity it is believed that wet granulation of the slag will be the simpler process ...

More

{Study on mineralogical crystallization of granulation of ...

Abstract: The process of granulation in blast furnace slag (BFS) by gas q uench-ing can effectively recover the waste heat of BFS and improve the value-added nature of the BFS byproduct. With decreasing temperature, BFS crystallizes into melilite, anorthite, spinel, etc. Mineral crystallization, however, is not conducive

More

Modeling on Dry Centrifugal Granulation Process of Molten ...

them, slag granulation process by a centrifugal force, which is also called DCG process, has proved its advantages due to its simpleness, controllability, less energy consumption and more sensible heat recovery in the past years.5–9) In this Modeling on Dry Centrifugal Granulation Process of Molten Blast

More

Converting Granulated Blast Furnace Slag into Fine Aggregate

The developed conversion process involves improving the physical properties in two stages. Stage 1: Altering granulation parameters Slag Granulation is primarily affected by water temperature, water pressure and water flow rate. When the material solidifies under slow cooling conditions, escaping gases leave behind micro pores in the cooled mass.

More

Feasibility of Rotary Cup Atomizer for Slag Granulation

1673 to 1823K in a slag temperature, 10g/s in a slag charging rate and 0.018kg/s in an air mass flowrate. After slag was granulated for a couple of minutes, the distribution of slag size in each zone of the receiver; 0 to 0.3, 0.3 to 0.4, 0.4 to 0.5, and 0.5 to 0.6m in

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‘Dry’Granulation of Slags for Producing Cement Binder

‘Dry’ granulation of blast furnace slag is emerging as an alternative process, overcoming the environmental problems and other disadvantages experienced with the wet granulation process

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OBJECTIVE: SCOPE: 3. PROCESS

vi) Slag Granulation Plant (SGP) / Slag Dumping Yard: During the process of iron making, the impurities are fluxed and removed as slag. The hot liquid slag is made into slag granules by means of high pressure water jets in the Slag Granulation Plant in the Cast House itself (sometimes separate SGP is located at a distance from the furnace proper).

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Granulated Blast Furnace Slag - an overview ...

When producing such cement, slag is usually the hardest to grind, and it forms the coarsest portion, while the cement is ground the finest [9]. A potential problem is moisture, which occurs in blast furnace slag during the granulation process.

More

PRODUCTION, CHARACTERISTICS AND USE OF

The ferrochrome slag products are quality assured and CE mark ed according to the stand-ards EN 13242 and EN 13043 [3,4]. The main requirements for CE marking are the aggregate size and size distribution, resistance to fragmentation, durability against studded tyres and durability against freeze/thaw. Figure 5: Slag granulation process Water from

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Valorisation Symposium

Proceedings of the Fourth International Slag Valorisation Symposium Zero Waste 15-17 April 2015 Leuven, Belgium Editors Annelies Malfliet and Yiannis Pontikes

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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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(PDF) Hot stage processing of metallurgical slags ...

After the liquid slag is separated from the metal, it is cooled to ambient temperatures, either in a matter of seconds using water cooling in a granulation or pelletisation process or in a slow process using air-cooling (Hiltunen and Hiltunen, 2004;Mihok et al., 2006).The cooled slag constitutes a high volume by-product of the pyrometallurgical ...

More

THE DRY BLAST- FURNACE SLAG GRANULATION AS

Slag treatment is the main ecological problem of the modern Ukraine metallurgy manufacture. The blast-furnace slag is the by-product of the ironmaking process. It has produced in the blast-furnace in the amount of 300 kg per tonne of pig iron. Now in Ukraine the blast-furnace slag is treated by impinging much water for granulation. This ...

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NATIONAL SLAG NSA 181-4 ASSOCIATION

2. SLAG GRANULATION PROCESS The Classical granulation process has been employed for a long time, and I do not believe it is necessary to describe it at this time. The cement companies in Europe have preferred basic slag for a long time and when acid slag was blended with Portland cement, a much reduced percentage was used.

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Converting Granulated Blast Furnace Slag into Fine Aggregate

The developed conversion process involves improving the physical properties in two stages. Stage 1: Altering granulation parameters Slag Granulation is primarily affected by water temperature, water pressure and water flow rate. When the material solidifies under slow cooling conditions, escaping gases leave behind micro pores in the cooled mass.

More

Modeling on Dry Centrifugal Granulation Process of Molten ...

them, slag granulation process by a centrifugal force, which is also called DCG process, has proved its advantages due to its simpleness, controllability, less energy consumption and more sensible heat recovery in the past years.5–9) In this Modeling on Dry Centrifugal Granulation Process of Molten Blast

More

Feasibility of Rotary Cup Atomizer for Slag Granulation

1673 to 1823K in a slag temperature, 10g/s in a slag charging rate and 0.018kg/s in an air mass flowrate. After slag was granulated for a couple of minutes, the distribution of slag size in each zone of the receiver; 0 to 0.3, 0.3 to 0.4, 0.4 to 0.5, and 0.5 to 0.6m in

More

PRODUCTION, CHARACTERISTICS AND USE OF

The ferrochrome slag products are quality assured and CE mark ed according to the stand-ards EN 13242 and EN 13043 [3,4]. The main requirements for CE marking are the aggregate size and size distribution, resistance to fragmentation, durability against studded tyres and durability against freeze/thaw. Figure 5: Slag granulation process Water from

More

(PDF) Hot stage processing of metallurgical slags ...

After the liquid slag is separated from the metal, it is cooled to ambient temperatures, either in a matter of seconds using water cooling in a granulation or pelletisation process or in a slow process using air-cooling (Hiltunen and Hiltunen, 2004;Mihok et al., 2006).The cooled slag constitutes a high volume by-product of the pyrometallurgical ...

More

OBJECTIVE: SCOPE: 3. PROCESS

vi) Slag Granulation Plant (SGP) / Slag Dumping Yard: During the process of iron making, the impurities are fluxed and removed as slag. The hot liquid slag is made into slag granules by means of high pressure water jets in the Slag Granulation Plant in the Cast House itself (sometimes separate SGP is located at a distance from the furnace proper).

More

Valorisation Symposium

Proceedings of the Fourth International Slag Valorisation Symposium Zero Waste 15-17 April 2015 Leuven, Belgium Editors Annelies Malfliet and Yiannis Pontikes

More

Prediction on particle size characteristics of high ...

Oct 01, 2020  New process for dry granulation and heat recovery from molten blast-furnace slag Ironmaking Steelmaking. , 12 ( 1985 ) , pp. 14 - 20 , 10.1016/0304-386X(85)90024-6 View Record in Scopus Google Scholar

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DRY SOLIDIFICATION WITH HEAT RECOVERY OF

The conventional water granulation process has to ensure that the complete stream of slag is dispersed into fine particles and also that it is rapidly cooled to below the transformation threshold (approx. 840°C).4 This cooling leads to such a quick increase in slag viscosity that the formation of a crystalline structure is prevented and a glass

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The Smelting Process - Sudbury INO

Kristiansand, Norway. Slag from the converter aisle is trans-ported by the Slag Hauler to disposal pits on site. The Acid Plant was commissioned in 1978 as part of the Smelter Environmental Improvement project. The Acid Plant treats the roaster off-gas, capturing the sulphur dioxide (SO 2) and producing a 93% sulphuric acid (H 2 SO 4), which is ...

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Research on the Activation Energy of the Crystallization ...

(3) Based on the study, the process and equipment for the dry slag granulation (DSG) technology was desired. References [1] Q. T. Fang. Introduction of blast furnace slag powder in cement production application [J]. Industrial b, 2016 (7) : 00173-00174.

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Preface for Thematic Section: Slag Granulation SpringerLink

May 31, 2019  Granulation of molten metallurgical slags is a value-adding process that converts a low-value byproduct (and sometimes waste) into a saleable product with multiple uses by the building and construction industries. In particular, when ironmaking slag is granulated and is substituted for Portland Cement, the environmental and economic benefits ...

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