T1 - Dry Slag Granulation - Investigations on the Behaviour of Liquid Blast Furnace Slag in Combination with Heat Recovery. AU - Kofler, Markus. N1 - no embargo. PY - 2014. Y1 - 2014. N2 - Blast furnace slag is well known as by-product of hot metal production in integrated steel and iron mills. About 300 million tons of this slag is produced ...
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 – the granulation unit which utilizes a granulation
Slag granulation with heat recovery is an essential and emerging technology for sustainable metal production. This technology has been developing for a few decades with much …
The process concept consists of a slag tundish and four subsequent heat exchangers. The liquid slag is poured into the slag tundish which homogenizes the slag …
If reactant gas was blasted instead of air, sensible heat of molten slag can be recovered in the form of chemical energy (ex. C/sub 4/+H/sub 2/O/spl square/3H/sub 2/+CO A/spl …
After granulation process is determined, the granulation water system will be defined, it has three types: granulation water is directly used in slag granulation, granulation water is cooled by ...
A physical model of molten slag granulation by rotary disk was developed based on the mechanism of Newtonian liquid granulation. For geometrical similarity, the radius ratio of model disk to the ...
For copper slag granulation, the main mass fraction peak moved to the range of small diameter with an increase in rotating speed. In metallurgical slag granulation, the particle size tended to be uniform with an increase in rotating speed. It is necessary to enhance the rotating speed to improve heat transfer between slag …
Dry granulation, as a new process of molten blast furnace slag (BFS) treatment, is an attractive alternative to water quenching. The performance of BFS obtained from dry granulation must be assessed. The glass content, which is a significant factor to evaluate the performance of BFS as a replacement material for Portland cement, was …
The results indicated that the length of molten slag ligament in granulation for ferroalloy slag, with high viscosity, was long. And there was small change in mean diameter of solid particles with an increase in rotating speed for metallurgy slag with low viscosity and surface tension. The semi-empirical relations, based on the experimental ...
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 …
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 …
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 to recover the heat.
The most important component of a dry slag granulation plant is a horizontally rotating device (disk) for spraying slag (a disk), with the molten slag being fed onto this disk. As the slag ...
To recover heat of the viscous slag chemically, the strongly endothermic reaction CH4+H2O →3H 2+CO was selected and then the property of dry granulation of the molten slag by Rotary Cup Atomizer ...
Dry Granulation of Molten Blast Furnace Slag and Heat Recovery from Obtained Particles. Yuelin Qin, Yuelin Qin [email protected] Search for more papers by this author. Xuewei Lv, Xuewei Lv [email protected] Search for more papers by this author. Chenguang Bai, Chenguang Bai.
Physical heat recovery after granulation. Once BF slag with ultra-high temperature are granulated into fine enough droplets, they begin to exchange heat with …
A considerable amount of heat energy is contained in the molten slag tapped from blast furnace.At present,the BF slag is treated by impinging much water for granulation and the energy is wasted without recovery.Thus,dry granulation technology has attracted more and more attention.The basic problems and technical difficulties of dry granulation were …
dry slag granulation pilot plant is outlined below: Process Air Supply A radial fan is installed to supply the granulator and the various air cooling chambers with process air. Based on the thermal balance of the granulator an air amount of maximal 180,000 Nm³/h is provided to cool the granules down to target temperature. This air amount and ...
slag can effectively granulate the molten converter slag. At the same time, the heat of converter slag can be recovered with air as the medium, so that the converter slag resources can be applied to the maximum extent [4, 5]. The process of air quenching granulation is to use high-pressure air to impact molten converter slag.
In this paper, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag handling. Metallurgical slags are produced at a massive rate of over 750 Mt/year, and carry a thermal energy equivalent to 40 …
granulation/heat recovery operation has been developed, shown schematically in Figure 4. In this process, the molten slag is first atomised in a dry granulator to produce fine slag droplets, which are
In this paper, the slag granulation and heat recovery options are reviewed and given a critical evaluation, aiming to provide a basis for future directions in slag handling.
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 Granulated slag Blast furnace slag Heat recovery Dry treatment Keyword (de) Granulation Granulierte Schlacke Hochofenschlacke Waermerueckgewinnung Trockenverfahren Classification Pascal 001 Exact sciences and technology / 001D Applied sciences / 001D11 Metals.
The trials for dry granulation of slag date back to 1930 [20], but the research surged in 1970s and 1980s in Europe and Japan, resulting in laboratory and pilot scale testing of several methods. In Section 3, the processes that have been proposed for energy recovery from slag based on the use of dry granulation are described. 2.2.
Highlights The granulation and heat recovery technologies towards molten slag of steel industry are reviewed. The working principle, research status, challenges and prospects of these technologies are analyzed. Centrifugal granulation combined with chemical heat recovery is the most perspective method among all technologies.
As the largest output of solid waste in the ISI, the production of blast furnace slag (BFS) by the blast furnace method exceeded 1.279 billion tons with extremely high temperature of 1500~1600 ℃ based on the global iron production estimation in 2022 (Duan et al., 2024b).The slag contained total residual waste heat of 7.55×10 8 GJ, equivalent …
The molten slag granulation mechanism in the gas quenching granulation technique has been rarely reported. The granulation characteristics, waste heat recovery and the relationship between them have not been made a profound study with different airflow velocity and different molten slag mass flow rate. In the present study, the …