Energy recovery from high temperature slags
Metallurgical slags are conventionally divided into ferrous and non–ferrous, based on the metal produced in each process. The typical chemical composition and …
Process Concept for the Dry Recovery of Thermal …
If a process for slag heat recovery is implemented with sufficient energy yields, the financial benefit is quantifiable depending on the energy's utilization. ... (2015) …
Recovery of silicon from metallurgical-grade silicon-refined slag …
A flotation recovery method of silicon from metallurgical-grade silicon-refined slag (silicate) using sodium silicate (SS) as the depressant was proposed. The solution chemistry, contact angle, and zeta potential measurements were used to understand the interaction mechanisms of SS on the silicate.
Experimental investigation on granulation characteristics …
Experimental investigation on granulation characteristics and waste heat recovery of molten slag in gas quenching dry granulation technique ... gas quenching slag granulation process is a gas-liquid flow atomization process which includes primary breakup and secondary breakup [31]. ... Tangshan metallurgical slag resource …
Process characteristics of catalytic thermochemical conversion …
Process II is established on the basis of integrating of heat recovery by means of dry granulation and granules slag pyrolysis. The molten slag is firstly broken up into fine solid particles by a spinning disk atomizer (SDA), where partial of waste heat can be recovered by gas medium (air, steam, N 2) simultaneously. Then the hot gas is used ...
Development of waste heat recovery technology from …
With the development of the iron and steel industry, the output of steel slag is also increasing year by year. In 2021, the output of steel slag is about 150 million tons. In terms of sensible heat recovery and utilization of steel slag, there are no application examples in the world. The main reason is that the technology is still immature.
Granulation and Heat Recovery from Metallurgical …
The process was designed, and the concept was tested on lab-scale demonstrators with an overall heat recovery rate of 42%. Some applications of the …
An Overview of Precious Metal Recovery from …
Steel slag is a solid waste of the steel industry, produced during steel production. Three types of slag, namely electric arc furnace (EAF), basic oxygen furnace (BOF), and Linz-Donawitz processed slag …
The pretreatment of non-ferrous metallurgical waste slag …
The pretreatment of non-ferrous metallurgical waste slag and its research progress in the preparation of glass-ceramics. ... such as raw material composition, process, heat treatment system, and so on (Cruz et al., 2022; ... Compared with the unmodified slag, the iron recovery rate of the modified slag was greatly increased from …
Heat Recovery from Slag through Dry Granulation
The heat recovery from high temperature slags (1450–1650 °C) from the metallurgical process represents one of the greatest potential to reduce the carbon emission in the steel industry (460 ...
(PDF) RECENT DEVELOPMENTS IN DRY SLAG …
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 ...
Current Development of Slag Valorisation in China
Slags are byproducts of the metallurgical industry. It is of importance to recycle materials and recover heat from metallurgical slags to reduce the energy consumption and environmental impact of steel industry. China is the largest iron- and steelmaking slag producer in the world, and intensive efforts have been made during last …
Waste Heat Recovery from Blast Furnace Slag by Chemical …
Blast furnace (BF) slag, which is the main byproduct in the ironmaking process, contains large amounts of sensible heat. To recover the heat, a new waste heat-recovery system—granulating molten BF slag by rotary multinozzles cup atomizer and pyrolyzing printed circuited board with obtained hot BF slag particle—was proposed in …
Enhancing Rotary Kiln-Electric Furnace Process of Saprolitic …
How to reduce the energy consumption of the rotary kiln-electric furnace (RKEF) process has become an important issue for the stainless steel industry. The aim of this study is to reduce the energy consumption of ferronickel production from saprolite nickel laterite in the RKEF process. The effects of the slag binary basicity, FeO content, and …
Heat Recovery and Energy Optimization in Smelter …
Metallurgical process off-gas presents real ... and slightly less than the blowing rate during slag blow. Process gas temperature is typically 1100 to 1200°C. The gas is captured by a primary hood, which typically allows 100 to 120% infiltration air into ... Heat recovery units need to be designed to allow streamlined gas flow through the unit ...
REVIEW OF WASTE HEAT RECOVERY TECHNOLOGIES …
3. CONCLUSION. The blast furnace slag, a by-product of the metallurgical industry, is a kind of high-quality heat resource with a large amount of emissions in steel making process. After granulation, the granulated particles are still at 1100 ° C, which is a typical semi-molten-wide sieving particle group.
Three-Stage Method Energy–Mass Coupling High-Efficiency …
The heat recovery rate of steel slag is greater than 80 pct. From the perspective of resource recovery, this method fully utilizes the resource attributes of steel slag to produce low-temperature solid steel slag, which can be used as a raw material for new-type plates and floorings. From the ecological point of view, excessive CO 2 …
Granulation and Heat Recovery from Metallurgical …
Metallurgical slags are produced at a massive rate of over 750 Mt/year, and carry a thermal energy equivalent to 40 Mt/year of coal. The potential mineral and …
Granulation and Heat Recovery from Metallurgical Slags
Metallurgical slags are produced at a massive rate of over 750 Mt/year, and carry a thermal energy equivalent to 40 Mt/year of coal. The potential mineral and thermal energy values of slags are in the order of $22 b and $3–6 b per year. Such attractive figures, together with tightening legislation on disposal of slag and the carbon footprint …
Centrifugal granulation performance of liquid with various …
A heat recovery technology coupling dry granulation of the molten slag with air cooling has aroused general concern since 1984 [3]. During the following development process of this technology, several granulation techniques have been proposed and investigated by various researchers including rotary drum [3], air blast [4], centrifugal ...
Comprehensive utilisation of blast furnace slag
At present, although the comprehensive utilis-ation rate of domestic blast furnace slag is more than 80%. However, the blast furnace slag treat-ment is dominated by the water quenching pro-cess, and a large amount of physical sensible heat is wasted in the process of water slag ushing. fl.
(PDF) Recent progress of hot stage processing for
Rong Wang, Xiangpeng Feng and Jinyin Cui, "The heat recovery simulation in the system of dry granulation of the steel slag", in Proceedings of Baosteel BAC 2010, pp. O-122-125, CDROM, Nov. 2010 ...
Applied Thermal Engineering
and waste heat recovery system for metallurgical slag. In the work ... packed bed of slag particles [9]. In this process, the extent of methane conversion could reach a maximum of 96%. Liu et al.
Energies | Free Full-Text | Heat Recovery from High Temperature Slags
Waste heat recovery from high temperature slags represents the latest potential way to remarkably reduce the energy consumption and CO2 emissions of the steel industry. The molten slags, in the temperature range of 1723–1923 K, carry large amounts of high quality energy. However, the heat recovery from slags faces several …
Granulation and Heat Recovery from Metallurgical …
Granulation and Heat Recovery from Metallurgical Slags. A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral …
Experimental investigation on molten slag granulation for waste heat
Request PDF | On Jun 1, 2016, Junxiang Liu and others published Experimental investigation on molten slag granulation for waste heat recovery from various metallurgical slags | Find, read and cite ...
Advances in recovery of valuable metals and waste …
Based on this, the chemical method is the main mode of copper slag waste-heat recovery, in which high-temperature solid copper slag is used as the heat carrier …
Application of iron and steel slags in mitigating greenhouse …
However, the recovery of residual heat from slag by thermal method still fails to solve the problems of low thermal conductivity, easy crystallization of slag, and discontinuity of temperature and time in the recovery process (Zhang et al., 2013). All these issues will affect the further improvement of slag waste heat recovery efficiency. 3.2.
Thermodynamic Analysis of Hydrogen Production from Bio …
(1) Background: The discharged temperature of steel slag is up to 1450 °C, representing heat having a high calorific value. (2) Motivation: A novel technology, integrating bio-oil steam reforming with waste heat recovery from steel slag for hydrogen production, is proposed, and it is demonstrated to be an outstanding method via …
Multi-Step Recycling of BF Slag Heat via Biomass for CO
The torrefaction process is linked with slag heat recovery and via the BASE method with enhanced blast furnace operation. Such a combination reduces CO2 emissions significantly in ironmaking processes. ... Barati, M.; Jahanshahi, S. Granulation and Heat Recovery from Metallurgical Slags. J. Sustain. Metall. 2020, 6, 191–206. …