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Aug 09 2014 · This involves granulating the slag by mechanical agitation and recovering heat from the granulation process by radiation and later from the granulated slag particles in a fluidized bed. The slag product is used as an aggregate for the construction industry. Dry slag granulation using a

A large amount of various molten oxides such as steelmaking slag and lava is cooled without heat recovery. For example the amount of slag as a byproduct Granulation of molten slag for heat recoveryIEEE Conference Publication

A method of controlling a supply of coolant gas to a dry slag granulation system the system comprising a rotary atomising granulator a slag receptacle for supporting a slag bed which is formed thereon when slag particles are expelled from the granulator the slag receptacle comprising a plurality of cooling inlets for cooling respective zones of the slag bed and at least one height

The invention relates to the granulation of molten slag directly from metallurgical furnaces. Known installation granulated slag containing slag chute which consistently are hydrogenerator a hoppersump with grate and overflow device and coupled with well installed the airlift connected in turn with the dehydrator carousel with feeding hopper and the discharge hopper and well air pump

Aug 09 2016 · 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.

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.

May 31 2019 · As a "wet" process water granulation cannot recover high-grade waste heat from molten slags. The process consumes a large amount of water (about 1 ton of water per ton of slag is lost through evaporation) and may emit acid mist H 2 S and SO 2 causing serious air pollution. Furthermore the wet granulated slag has to be dewatered at a

The article explains why the use of a novel spinning disc/cup dry slag granulation process is a more sustainable approach to turning molten slag into cement. The advantages of this process are water conservation elimination of sulphur emissions and recovery of high value waste heat.

May 09 2019 · Primetals Technologies has developed a new innovative blast furnace dry slag granulation process with heat recovery at the voestalpine pilot plant in Linz Austria. You want to know more about our

Dry Granulation of Blast Furnace Slag for Heat Recovery Blast furnace slag is known as a by-product from the production of hot metal at integrated steel and iron mills. Approximately 300 kg of this liquid slag with a temperature of about 1500°C is tapped together with each ton hot metal.

A method of controlling a supply of coolant gas to a dry slag granulation system the system comprising a rotary atomising granulator a slag receptacle for supporting a slag bed which is formed thereon when slag particles are expelled from the granulator the slag receptacle comprising a plurality of cooling inlets for cooling respective zones of the slag bed and at least one height

Nov 06 2019 · We developed a new integrated dry granulation and heat recovery process which promotes sustainability and full value recovery. Molten slag is atomised under centrifugal forces exerted by a spinning disc to produce droplets which are then quenched and solidified using air

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. Technical Excellence .

Dry Slag Granulation. Steelmaking slags are typically dumped to ground and used as low-value road aggregate. Hatch s dry slag granulation process uses air to directly granulate slag. The dry slag granulation advantages include improved safety reduced noise and pollution and ability to access higher value-added slag markets. Custom Robotics

A potential problem is moisture which occurs in blast furnace slag during the granulation process. The presence of moisture requires dewatering the blast furnace slag before using it as an additive or as a mineral admixture to Portland cement 10 .

It has been developed as a process which involves Dry granulation and Carbonization. The TBF slag was loaded into a rotation plate producing the slag particles in a certain range of size under

The process of slag granulation involves pouring the molten slag through a high pressure water spray in a granulation head located in close proximity to the blast furnace. Granulation process is the controlled quenching of the slag in cold water which does not give time for crystalline growth to take place. Large volume of water is required

The molten slag is then separated from the liquid metal and cooled (Gielen et al. 2008). If the molten slag is cooled and solidified by rapid water quenching to a glassy state little or no crystallization occurs. This process results in the formation of sand size (or frit-like) fragments usually with some friable clinkerlike material.

Granulation is the process of forming grains or granules from a powdery or solid substance producing a granular material is applied in several technological processes in the chemical and pharmaceutical industries. Typically granulation involves agglomeration of fine particles into larger granules typically of size range between 0.2 and 4.0 mm depending on their subsequent use.

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.

Slag cement is the hydraulic cement that results when molton slag from an iron blast furnace is rapidly quenched with water dried and ground to a fine powder. The rapid quenching ("granulation") "freezes" slag cement in a glassy state and imparts cementitious properties to the product when ground finely.

The process of slag granulation involves pouring the molten slag through a high-pressure water spray in a granulation head located in close proximity to the blast furnace. Granulation process is the controlled quenching of the slag in cold water which does not give time for crystalline growth to

May 05 2013 · Concept of slag granulation. The process of slag granulation involves pouring the molten slag through a high pressure water spray in a granulation head located in close proximity to the blast furnace. Granulation process is the controlled quenching of the slag in cold water which does not give time for crystalline growth to take place.

Granulation is the process of forming grains or granules from a powdery or solid substance producing a granular material is applied in several technological processes in the chemical and pharmaceutical industries. Typically granulation involves agglomeration of fine particles into larger granules typically of size range between 0.2 and 4.0 mm depending on their subsequent use.

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.

The conventional wet granulation process produces a mixture of granular slag <5 mm and a lot of water. A more efficient modern granulation system uses high-pressure water jets that impinge on the stream of molten slag at a water-slag ratio of about 10 to 1 by mass. Another process referred to as air granulation involves the use of the pelletizer.

Moisture in blast furnace slag which occurs in the granulation process or in pelletized slag should be removed by drying prior to the use of GGBFS as either an additive to Portland cement or a mineral admixture to Portland cement concrete. Grinding

(2020). Granulation mechanism of gas quenching blast furnace slag with different basicities. Ironmaking Steelmaking. Ahead of Print.

Dry Slag Granulation. Steelmaking slags are typically dumped to ground and used as low-value road aggregate. Hatch s dry slag granulation process uses air to directly granulate slag. The dry slag granulation advantages include improved safety reduced noise and pollution and ability to access higher value-added slag markets. Custom Robotics

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May 09 2019 · Primetals Technologies has developed a new innovative blast furnace dry slag granulation process with heat recovery at the voestalpine pilot plant in Linz Austria. You want to know more about our

Author Primetals Technologies

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

slag granulation process pdf Shanghai Xuanshi Machinery. 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 » Free online chat The SLAG REC project for an innovative direct dry granulation

increase could be measured. With the obtained data process optimization can be done and a scale up for further investigations can be realized in the future. Using dry slag granulation at integrated steel and iron mills will gain access to the sensible heat of the blast furnace slag. The recovered energy can be

glass structure is required. The granulation of slag is need-ed to make uniform glassification due to its low thermal conductivity. The point is that the dry slag granulation with quenching is necessary to solve the problems above men-tioned because it keeps slag property as a raw material of cement. Furthermore it is expected that slag

Slag Cement. Lafarge NewCem® is a supplementary cementitious material (SCM). It can be used in tested quantities to enhance the desired properties of concrete. Slag. Slag is produced during the iron-manufacturing process. During the manufacturing process