Slag Granulation with Continuous Dewatering Ironmaking. INBA System. Ironmaking Slag Granulation with Continuous Dewatering and Pollution Control. Slag Granulation with the INBA Dewatering System. 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
Oct 08, 2021 Yu, et al. 188 reviewed the granulation process for blast furnace slag. They reported that for every pig iron production accompanied by 0.3-0.6 tons of blast furnace slag produced with the ...
The slag granulation plant comprises three sections for granulation, dewatering and storage. In the granulation section, the liquid slag is quenched by pouring onto it an excess water stream. The evaporated water will be condensed in a condensing tower located above the granulation tank.
Nov 03, 2021 During granulation, due to rapid cooling (quenching), the slag solidifies in a glassy (amorphous) state and the latent heat of crystallization (300400 kJ/kg) is not released and is realized in the form of chemical energy, giving the slag a valuable quality hydraulic activity.
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. The rotation of the cup
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...
May 05, 2013 The process of slag granulation involves pouring the liquid slag through a high pressure water spray in a granulation head, located in close proximity to the BF. Granulation process is the controlled quenching of the slag in cold water which does not
Process for granulation of slag . United States Patent 4374645 . Abstract The granulation of molten material, blast furnace slag for example, is accomplished by wetting the slag with a stream of water and thereafter transporting the thus formed granules away from the point of granulation with the water stream. Water consumption is minimized ...
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
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
The wet granulation process operates with a high water to slag ratio of about 81. 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
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
There are various processes on the market for the granulation of blast furnace slag. The most important process is cooling in a water bath. The most common methods are the RASA system from Rasa Corporation, the INBA system (Fig. 16) from Paul Wurth, a company of the SMS group, and the IJ GRAN system from Danieli-Corus.
May 30, 1997 Process and apparatus for granulation of slag 1985-01-22 Monteyne et al. 65/19 4461636 Installation for continuous treatment of molten materials to obtain pelletized products 1984-07-24 Gagneraud et al. 4416690 Solid matte-oxygen converting process 1983-11-22 Richards et al. 75/26 4230477 Apparatus for granulating molten slag 1980 ...
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).
In molten slag centrifugal granulation heat recovery technology, the centrifugal granulation process is crucially important to realize efficient heat recovery as well as high-quality resource ...
Oct 05, 2015 Centrifugal granulation is a crucial step in the most promising heat recovery technique for molten blast furnace slag. Facing the fact that slag viscosity changes during the granulation process, in the present work, visualization experiments were conducted for centrifugal granulation of mixture liquids by a spinning disc.
Molten matte or slag is water granulated by feeding molten matte or slag through a launder to a granulator tank. The tank includes sloping walls and is equipped with adjustable overflow weirs and one or more of spray nozzles. These nozzles are positioned such that the water that they emit impacts on substantially all of the molten matte or slag that is fed to the granulator tank.
Dec 09, 2019 Process credits compared to wet granulation 15.72 A$/t slag. Process credits compared to air-cooled slag 59.79 A$/t slag. Scattered data show HREs in the range of 4070%, with most data hovering around 50%. A challenge in this regard is the fundamental trade-off between the heat quality and the degree of slag vitrification, which is ...
from blast furnace slag, the air granulation method, 8,9) rotating drum granulation method,10) and stirring granulation method11) were examined with practical scale equipment. Recently, the rotary cup atomizer method12,14) and fluidized bed direct charging method15) have also been examined. The only example of practical application of an air gran-
However, a dry slag granulation system had not yet been deployed in the non-ferrous industry. Although it has demonstrated success in the steelmaking industry for decades, adoption of a dry granulation solution in non-ferrous industries has been challenged by the technical risks associated with process uncertainties and by the financial risks ...
that no slag, matte, or alloy responds in similar fashion to a granulation practice. This paper addresses three issues, namely Water-granulation of BOF steel slag, without processing it to render it environmentally safe, physically and chemically acceptable for use by the construction industry, and the process economical
The plant for granulation of blast furnace slag is an addition made within the scope of the modernization project for the existing Blast Furnace, and is also part of the technological entity for production of crude iron. The technology of slag processing through granulation starts by effusion of
2.1. Governing Equations of Molten Slag Flow and Granulation on a Rotary Disc. The DCG process of molten slag is simulated with a three-dimensional simulation program which is based on the VOlume of Fluid (VOF) scheme. 12) In this scheme, the fluid flow including molten slag and surrounding gas is described by the momentum and continuity equations, and the transient interface between molten ...
cooled lumpy slag which is collected from various process phases, e.g. from ladles and launders. The slag is directly granulated during tapping where ferrochrome is tapped into ladles. The overflow from the ladles flows along the slag launder to the granulation pond, where high-pressure water breaks slag into
The dry slag granulation advantages include improved safety, reduced noise and pollution and ability to access higher value-added slag markets. Custom Robotics Solutions Steelmakers are adopting newer, safer working methodologies to improve process consistency and keep people away from hazardous molten slag and steel.
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 .
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.
The slag granulation installation designed by us enables its easy transport and dosing. Basic scope of design works wet dust extraction system and extraction of steam generated in the process with a capacity of 80,000 Nm3/h (the installation includes a system of extractors sealing the granulation chute, pipeline installation, counterflow ...
Jun 30, 2014 The batch-wise operating BSSF plants have short process times and a compact design. They achieve a high level of slag and crude steel metal separation, uniform granulation and a consistently high quality in the end products. Further information about solutions for steel works, rolling mills and processing lines can be found at www.siemens.com ...
Granulation of titania slag has been identified as a potential viable alternative to the conventional block route. Both wet and dry granulation of titania slag has been investigated. TiO2-rich slag is a suitable feed material for the chloride process if the ilmenite feed material is low in alkaline earth impurities.
Oct 24, 2021 Cast House Slag Granulation Plant-10 is an important unit of Blast Furnace-5 which was functioning since 1995. This granulation process is of dehydrator type, through which work was done to
Oct 15, 2020 The molten slag is intermittently discharged from the blast furnace during the iron making process. To match the running time difference between the iron making process and the centrifugal granulation process, and to realize the flow control of molten slag, a tundish is generally adopted to temporarily deposit the molten slag.
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.
Paul Wurth has developed the INBA slag granulation process, incorporating our proprietary dynamic INBA dewatering drum. With about 230 references, it is the most popular and effective means of processing blast furnace slag in the world today. The process is highly flexible and the compact sub-plant can be applied to any furnace configuration.