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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 ...
Jul 31, 2002· (3) Sulfide is emitted from the slag into an air by the water quenching. (4) A post process for drying slag is a must after the water quenching. (5) The thermal energy of high temperature slag is wasted without recovery. To solve these problems, we studied the dry granulation of the molten slag by rotary cup atomizer (RCA).
Siemens VAI wants to build a pilot plant for dry slag granulation for testing the possibility of integrated heat recovery, needing small amounts of liquid slag for the test performance. This is where the Flash-Reactor enters the project as upstream melting unit.
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).
Dry granulation of liquid BF slag is being developed in many countries along with heat recovery process. The dry granulation process of liquid slagis described below. 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.
Feb 15, 2020· 2.2. Methods. The solid slag particles from dry granulation were ground in a ball mill. Then, the slag powder was mixed with cement clinker. The ball mill used a fixed rotating speed of 250 rpm, and the diameters of the metal balls were 5 mm, 8 mm, 10 mm, 12 mm, and 15 mm, with mass fractions of 30%, 25%, 25%, 10%, and 10%, respectively [].
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.
Although Pickering's plant design for combined dry granulation and heat recovery was only a proposal, Davy McKee, and then VAI-UK [37][38] [39], continued development [7] of spinning cup dry ...
dry slag granulation – Grinding Mill China. slag granulation process pdf Xuanshi Machinery. slag granulation process pdf. Nowadays, the XSM stone crusher CSIRO dry slag granulation process. ... Granulation Plant For Copper Slaghwt. dry granulation copper slag Siemens VAI wants to build a pilot plant for dry slag granulation for testing the ...
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Dry slag granulation with heat recovery Primetals Technologies, voestalpine Stahl, the FEhS – Building Materials Institute and the University of Leoben joined forces in an R&D program to develop a new dry-granulation technology using air to cool molten slag and recover the lost heat energy.
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.
Dry slag granulation is based on molten slag atomization using a variable speed rotating cup or dish (see Fig. 1). The slag is fed from the slag runner via a vertical refractory lined pipe directly onto the center of the rotating cup.
Kappes H and Michels D (2015) Dry slag granulation and energy recovery. In: Proceedings of the Fourth International Slag Valorisation Symposium, pp 39–52. Google Scholar. 17. Jahanshahi S and Xie D (2012) Current status and future direction of CSIRO's dry slag granulation process with waste heat recovery. In: Proceedings for the 5th ...
Dry granulation of titania slag was carried out at the 500 kW DC furnace on site. In this instance compressed air was used as granulation medium. Two rectangular guide plates placed on the slag taphole side of the furnace channelled granulated particles produced during the granulation trials.
Granulation is the process of forming grains or granules from a powdery or solid substance, producing a granular material.It 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.
2.3 Dry Slag Granulation Significant research and development has occurred in the area of Dry Slag Granulation (DSG) over the past decades. Development of DSG technologies is driven by the desire to improve safety and sustainability of conventional slag handling methods. The most significant advantage of DSG is that it provides a safer and more
Dry granulation of blast furnace slag was experimented with in the Commonwealth Scientific and Industrial Research Organization (CSIRO), Australia. In this process, molten slag is atomized under centrifugal forces on a spinning disc and the slag droplets generated are quenched and solidified quickly using air ( Xie & Jahanshahi, 2008; Xie et al ...
Dry granulation is traditionally referred to as extrusion granulation. And you don't need to add water or adhesives to the fertilizer process. In the extrusion granulation process, the raw material is gathered into the primary powder in the fertilizer granulator under high pressure, and the powder is extruded into fertilizer granules between ...
May 06, 2016· National Slag Association Iron and Steel Slag Products - Duration: 3:52. National Slag Association 8,325 views. 3:52. 3D Interactive Blast Furnace for Training - Duration: 1:18.
A slag granulation device comprises a slag granulation chamber; a rotary atomising granulator (5, 6) to atomise molten slag, the granulator being mounted in the granulation chamber; and an air supply (33) to supply air to the molten slag (9) before the slag is atomised. The system further comprises a slag delivery mechanism for delivering slag to the granulation chamber.
At the present molten slag from a blast furnace (B.F.) is granulated by impinging much water without any recovery of its much sensible heat (1823K), polluting water and atmosphere. To solve these problems, we studied the dry granulation of molten slag by Rotary Cup Atomizer (RCA), in .
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 with water.
A dry granulation experiment was done by means of a rotary cup atomizer for blast furnace slag instead of the currently used water quenching process because it is unable to efficiently recover the ...
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