Steelmaking slags are typically dumped to ground and used as low-value road aggregate. Hatchs 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.
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
Development of air granulation technology began in the 1970s for steelmaking basic oxygen furnace slag and ferronickel slag, which proved to be technically and economically viable at the commercial scale 13,14,15. Air granulation is a simple process as no mechanical equipment is in contact with molten slag.
Our dry slag granulation technology involves pouring molten slag from above our rig down to a spinning disc. That disc is spinning at high speed and it atomises the molten slag into small granules. Image changes to show molten slag being atomised and collected in the taurus
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 associated with investing
slag granulation experiment using water spraying unit. Based on the experimental results. a granulation plant is proposed to be built closely to the existing steel making plant. This study is part of a larger investigation work covering slag granulation andfeasibility study on utilization of slag granules for Portland-pozzoland cement. INTRODUCTION
By converting low value air-cooled blast furnace slag into a high value material for the cement/construction industry, this process turns a waste product into wealth. We are partnering with Beijing MCC Equipment Research Design Corporation (MCCE) to commercialise the dry slag granulation technology.
Eco-friendly steelmaking slag solidification with energy recovery to produce a high quality slag product for ... Granulation of slag with air blast techniques was put into operational practice in early 1990s in Japan. The reason for stopping is not clear, shortcomings include
Dry slag granulation is the key to molten slag heat recovery. In this paper, we will present our current status on BOF slag modification and dry granulation. Therefore, the paper will be
Products Ironmaking and steelmaking Slag Granulation . 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 This proven granulation process ensures economic granulation and produces valuable and consistent properties in
We are convinced that dry slag granulation technology, if deployed widely, would mark a significant step toward the green future of steelmaking. The slag runner that feeds the pilot plant at voestalpine Stahl in Linz, Austria. The final product dry slag sand with a glass content of 9497% can serve as a premium-quality substitute for cement ...
Jan 01, 2007 This paper presents a study regarding four different types of steelmaking slags a ladle slag, a basic oxygen furnace (BOF) slag and two types of electric arc furnace (EAF) slags, modified by different cooling conditions. The aim was to determine if rapid cooling by water granulation would result in a glassy slag with improved properties ...
Aug 10, 2021 Basic oxygen steelmaking (BOS) slag, a product of hot metal element (e.g., Si, Mn, Fe, P) oxidation and flux (e.g. lime, dolomite) dissolution, plays a critical role in the production of high-quality crude steel, although its behavior inside the BOS vessel (formation and reaction with metal droplets and gas) is still not clear and its recycling has always been challenging.
3.2. Heat Recovery from Steelmaking Slag Steelmaking furnaces such as BF, LDC and EAF, dis-charge a large amount of high temperature molten slag as waste. Presently, the slag is treated conventionally by im-pinging it with a large amount of water for the granulation and glassication processes. However, this method has the following problems
Dry slag granulation at a spinning disc Key Results/Findings A conceptual flowsheet has been developed in the 1 st year (by June 2007) of the project based on process modelling and focused ...
Aug 09, 2014 Dry Granulation of Blast Furnace Slag for Energy Recovery Around 300 kg of liquid slag is produced as byproduct while producing one ton of hot metal in a blast furnace (BF). This slag is at a temperature of around 1500 deg C and has a
slag hot liquid metallic particles granulation cake Prior art date 2010-12-15 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number US13/994,807 Other versions US9371571B2 (en ...
Jan 01, 2019 G. Bisio, Energy recovery from molten slag and exploitation of the recovered energy, Energy, 22 (1997) 501509. 46 L. Junxiang, Y. Qingbo, Z. Zongliang, Y. Fan, D. Wenjun, Q. Qin, Blast furnace slag obtained from dry granulation method as a component in slag cement, Construction and Building Materials, 131 (2017) 381387. 47 H.
Mar 16, 2015 Forging a future in green steelmaking. ... The process, known as Dry Slag Granulation, also reduces water use and greenhouse gas emissions, and is the focus of an agreement signed by CSIRO and the Beijing MCC Equipment Research
Dec 01, 2019 The paper proposes a method of processing steelmaking slag in order to save resources. The authors propose to include partial granulation of steelmaking slags in the processing scheme. This option includes draining the slag melt from the steelmaking unit into ladles and dividing the slag melt into two parts, one of which is enriched in iron.
The current state of ironmaking and steelmaking slags valorisation in China is reviewed in this paper. The hot stage processing processes with respect to BF slag granulation and steel slag pyrolytic self-slaking have made progress and are applied in a number of large steelmaking companies in China. Current researches and
slag granulation process the process involves pouring the molten slag through a high pressure water spray in a granulation device 3. in ... steelmaking slag and activators of slag hydratation can be used as substitute for cement in application for lower lay-ers of roads. By use of substitute prolonged solidification
Slag, treatment, reduction, metal and heat recovery, granulation, slag product . 1. Introduction The metallurgical industry generates every year huge amounts of slag. The annual amount of generated steelmaking slags alone is more than 100 million tons. The steel slag is normally used as construction materials, for instance, for
Dry slag granulation with heat recovery The development of Baosteel slag ... steelmaking for metal recovery and utilization in the cement industry ... to the hotels Departure from the hotel to restaurant Utilization of steelmaking slag in Japan and recent progress toward soil amendment Use of iron and steel slag in Japan the state of the art
Paper 5 Continuous slag solidification and heat recovery process as a new application of steelmaking slag - 2 Results of the pilot-scale experiment Yasutaka Ta JFE Steel Co. Paper 6 Dry slag granulation with energy recovery From inception to hot commissioning of industrial pilot plant Horst Kappes Daniel Michels Paul Wurth
the as-received slags. The work concludes with a proposed hydration behavior for the major slag phases. Keywords secondary steelmaking slag, quenching, melt spinning, mechanical activation, cement. 1. Introduction . With an EU-wide clinker benchmark production of 0.78t of CO. 2. per ton of grey clinker 1 and an annual worldwide
Recycling Ladle Furnace Slag as Flux in Steelmaking A Review SpringerLink. 16/9/2019 LF slag recycling was tested at JSW Steel, Vijayanagar Works, India by means of Al-killed ladle furnace slag as a replacement to synthetic slag. The recycling process was carried out in two steps. Even though the composition of LF slag is simila . Get Price
Global Slag. Slag company of the year was Tata Steel Slag user of the year was Holcim Equipment supplier of the year was Loesche Slag plant of the year was the Calvert, Alabama, plant of Tube City IMS Slag product of the year was heavily-bound EAF steel slag ER-MB20 road-base from SCE Materials and Recycling in Australia the technical innovation of the year
Final process scale 180 t-slag/h,unit Design Basic Conceptual Design Heat Recovery from Molten Steelmaking Slag (I) Granulation Molten Slag 2ndstage Heat recovery unit High temp. Granules Air Low temp. Granules Heat recovery ratio (%) Recovered heat by air / Molten slag heat capacity X 100 Supply Molten slag Granulation
Grinding Plant for Blast Furnace Slag. Granulation System for BOF Slag. Dust Reutilization for Electric Arc Furnace (EAF) Steelmaking Dry Bottom Ash System for Coal Firing Boilers
Session 3 Slag grinding advances. 10.30. Speed-dating session Bring plenty of business cards for this popular networking session. 11.00. Coffee and networking in the Global Slag exhibition area. 12.00. Session 4 Adding value to slag and slag materials. 13.00. Lunch and networking.
the granulation-carbonation experiments, a custom-made Perspex lid with a CO 2 feeding system was placed over the reactor. For both types of experiments, air-dried slag (approximately 500 g) and deionized water were premixed in a plastic bag, at the liquid to solid ratio that resulted optimal for the granulation of this material at the
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 value added product for the cement industry. The INBA system comprises two main components
slag hot liquid granulation metallic particles liquid slag Prior art date 2010-12-15 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Abandoned Application number CA2821222A Other languages French (fr ...
The implementation of the granulation basin reduces the solidification time of the slag, the sulphurous emissions and the slag sand product can be improved. The granulation basin allows the introduction of a sealing hood as a barrier to false air, besides additional benefits e.g, higher resistance to wear, reduced height design, reduced pipe ...