Dry Granulation of Blast Furnace Slag for Energy Recovery
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 sensible heat of approximately 400 M Cal per ton. BF slag is rich in CaO, SiO2, Al2O3, and MgO …
اقرأ أكثر
Waste Heat Recovery from Blast Furnace Slag by …
Blast furnace (BF) slag, which is the main byproduct in the ironmaking pro-cess, 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 …
اقرأ أكثر
Multi-Step Recycling of BF Slag Heat via Biomass for CO 2 …
Iron- and steelmaking processes create slags, valuable by-products. Industrial utilisation of slag as a lower-value secondary mineral source has been established for decades. Slag heat recovery is an ongoing research topic and has the potential to maximise energy efficiency in iron and steel production. Heat recuperation …
اقرأ أكثر
Future trend of terminal energy conservation in
In steelmaking process, molten slag like BOF (Basic Oxygen Furnace) slag or EAF (Electric Arc Furnace) slag was discharged after steel tapping, and then poured into some kinds of apparatus for slag granulation and heat recovery as shown in Fig. 1.Presently, the available physical methods for molten slag heat recovery include …
اقرأ أكثر
Waste Heat Recovery from Blast Furnace Slag by Chemical …
To recover the sensible heat of BF slag, three key problems should be considered: (I) the dry granulation of BF slag without consuming water, (II) increasing …
اقرأ أكثر
Energy recovery from high temperature slags
A comprehensive review of waste energy of slag and its recovery methods are presented. The waste heat of slags amounts to ∼220 TWh/year. Recovery of three …
اقرأ أكثر
Granulation performance by hybrid centrifugal-air blast …
The following difficulties and obstacles exist in the recovery of energy from molten slag (Barati and Jahanshahi, 2020): (1) the low thermal conductivity of slag hinders the full extraction of heat; (2) slag is corrosive to the recovery equipment; (3) the waste heat recovery of hot slag is not conducive to the formation of the glass phase, and ...
اقرأ أكثر
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 …
اقرأ أكثر
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 ...
اقرأ أكثر
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 …
اقرأ أكثر
Dry Granulation of Molten Blast Furnace Slag and Heat Recovery …
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.
اقرأ أكثر
Heat recovery process modelling of semi-molten blast furnace slag …
As a valuable byproduct of the iron-making process, blast furnace slag with temperature up to 1450–1650 ° C contains a tremendous amount of sensible heat. Dry granulation and waste heat recovery via a moving bed is an attractive alternative to the conventional water quenching method due to energy-savings and the reduction in water …
اقرأ أكثر
Centrifugal granulation performance of liquid with various …
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. Then, the effect of liquid …
اقرأ أكثر
Theoretical analysis of free-surface film flow on the rotary
Request PDF | On Feb 1, 2014, Dongxiang Wang and others published Theoretical analysis of free-surface film flow on the rotary granulating disk in waste heat recovery process of molten slag | Find ...
اقرأ أكثر
(ET)Dry Granulation of Molten Blast Furnace Slag and …
To recover the sensible heat of BF slag, three key problems should be considered, which refer to (1) the dry granulation of BFS without consuming water, (2) how to recover the …
اقرأ أكثر
Life cycle and economic assessment of multi-stage blast furnace slag
Therefore, there were some advantages in multi-stage slag waste heat recovery system. 4.3. Economic performance4.3.1. Cost and profit. To evaluate the economic performance of multi-stage slag waste heat recovery system, the capital cost and return analysis were conducted, which included the process of slag production, …
اقرأ أكثر
New process for dry granulation and heat recovery from molten blast
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.
اقرأ أكثر
Dry slag granulation with integrated heat recovery
Dry slag granulation with integrated heat recovery. July 2011. Conference: 1st International Conference on Energy Efficiency and CO2 Reduction in the Steel Industry (EECR Steel 2011) At ...
اقرأ أكثر
Flight Dynamics and Sensible Heat Recovery of …
Keywords: Blast furnace slag, flight dynamics, granulation, heat exchange, sensible heat recovery. 1. INTRODUCTION Blast furnace slag is the byproduct of iron-making process, whose discharging temperatures range from 1400 to 1600 °C, with the specific sensible heat of around 1.76 GJ/t. In China, 658.9 million tons of iron were produced in 2012.
اقرأ أكثر
Process Concept for the Dry Recovery of Thermal Energy of …
A new approach for dry heat recovery [13, 14] has been investigated to address the challenge of separating amorphous solidification of blast furnace slag from heat recovery. The chosen approach is designed to recover heat from slags during its …
اقرأ أكثر
Heat Recovery from Slag through Dry …
million tonnes of slags each year, which contain. about 4 PJ of sensible heat on cooling from 1500 °C. to 25 °C. Currently these slags are either air cooled. (Figure 1) or water granulated and ...
اقرأ أكثر
A Review of Granulation Process for Blast Furnace Slag
Blast furnace slag is a by-product of blast furnace (BF) ironmaking produce. Every pig iron production is accompany by 0.3 ~ 0.6 tons of blast furnace slag produced with the temperature of 1350 ć ~1450 ć (1600~1 800 MJ sensible heat, equivalent to 55~61kg standard coal combustion after the heat generated). On this basis, the BF slag is up to ...
اقرأ أكثر
Experimental investigation on granulation characteristics …
1. Introduction. Molten blast furnace slag (BFS) is the main by-product of iron making process with the 1450–1550 °C discharge temperature [1], which contains large amounts of physical sensible heat and belongs to high-quality waste heat resource [2].Each ton of molten slag contains 1260–1880 kJ thermal energy which is equivalent to 60 kg …
اقرأ أكثر
Film fragmentation mode: The most suitable way for …
@article{Tan2020FilmFM, title={Film fragmentation mode: The most suitable way for centrifugal granulation of large flow rate molten blast slag towards high-efficiency waste heat recovery for industrialization}, author={Yu Tan and Hong Wang and Xun Zhu and Yiwen Lv and Ding Yudong and Qiang Liao}, journal={Applied Energy}, …
اقرأ أكثر
Towards Greener Industry: Modelling of Slag Heat Recovery
Centrifugal granulation technique is the most feasible method for heat recovery from molten blast furnace (BF) slag. ... granulating device as well as the slag droplet with diameter of 5 mm and ...
اقرأ أكثر
Centrifugal-Granulation-Assisted thermal energy recovery …
Typical conceptual paradigms of centrifugal-granulation-assisted heat recovery from blast furnace slag by (a) CSIRO [54], (b) ... Dry granulation of molten blast furnace slag in granulating mills (Trockene Koernung von fluessiger Hochofenschlacke in Granuliermuehlen) Stahl Eisen, 50 (1930), pp. 1775-1778. Google Scholar
اقرأ أكثر
Research status of centrifugal granulation, physical heat …
The physical method, a traditional heat recovery method, has experienced constant developments in regards to bed types and heat exchange mediums. The …
اقرأ أكثر
(PDF) Dry Granulation of Molten Blast Furnace …
Dry Granulation of Molten Blast Furnace Slag and Heat Recovery from Obtained Particles. May 2012. DOI: 10.1002/9781118365038.ch24. Authors: Qin Yuelin. Chongqing …
اقرأ أكثر
Theoretical analysis of free-surface film flow on the rotary
Molten slags carry a substantial amount of high quality thermal energy since the tapping temperature is up to 1000–1650 °C [3], [4], [5].As demonstrated from Fig. 1, ferrous slags account for over 90% of the available energy associated with slags and hot metal blast furnace (BF) slag alone constitutes 47% of this energy [2].Therefore, in this …
اقرأ أكثر
Development of molten slag dry granulation and heat recovery in …
Abstract. The difficulties of molten metallurgical slag (including blast furnace slag and steel slag, etc.) heat recovery caused by low thermal conductivity and high enthalpy are analyzed. The ...
اقرأ أكثر