Towards Greener Industry: Modelling of Slag Heat …

1.1. Slag Heat Recovery Energy recovery from hot liquid slag is one of the underused candidates for increas‐ ing energy efficiency in steel production. In 2018, around 330 to 375 million tons of blast furnace slag (BFS) and around 250 million tons of steelworks slags (65% basic oxygen fur‐

Theoretical analysis of free-surface film flow on the rotary

Theoretical analysis of free-surface film flow on the rotary granulating disk in waste heat recovery process of molten slag. Author links open overlay panel Dongxiang Wang ... 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]. …

(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 …

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 ...

Multi-Step Recycling of BF Slag Heat via Biomass for CO 2 …

The torrefaction process is linked with slag heat recovery and via the BASE method with enhanced blast furnace operation. Such a combination reduces CO 2 …

Experimental investigation on granulation characteristics and …

DOI: 10.1016/j.applthermaleng.2020.116295 Corpus ID: 228883896; Experimental investigation on granulation characteristics and waste heat recovery of molten slag in gas quenching dry granulation technique

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, …

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 ...

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 …

Numerical study on solidification behaviors of a molten slag …

1. Introduction. Blast furnace (BF) slag is the main by-product generated in the iron-making process, which is discharged at a temperature about 1500 °C [1].In 2015, nearly 384 million tons of blast furnace slag was produced worldwide containing a tremendous amount of high grade thermal energy [2].At present, the molten slag is …

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 …

Heat recovery process modelling of semi-molten blast furnace slag …

DOI: 10.1016/J.ENERGY.2019.115876 Corpus ID: 201238431; Heat recovery process modelling of semi-molten blast furnace slag in a moving bed using XDEM @article{Feng2019HeatRP, title={Heat recovery process modelling of semi-molten blast furnace slag in a moving bed using XDEM}, author={Yanhui Feng and Zhang Zhen and …

Centrifugal granulation performance of liquid with various …

DOI: 10.1016/J.APPLTHERMALENG.2015.06.031 Corpus ID: 106899791; Centrifugal granulation performance of liquid with various viscosities for heat recovery of blast furnace slag @article{Wu2015CentrifugalGP, title={Centrifugal granulation performance of liquid with various viscosities for heat recovery of blast furnace slag}, author={Junjun Wu …

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 …

Research status of centrifugal granulation, physical heat …

Efficient recovery of heat and utilize blast furnace slag resources are crucial for achieving energy savings and reducing consumption in the steel industry. This study …

Energy recovery from high temperature slags

The waste heat of slags amounting to ∼220 TWh/year at temperatures in the range of 1200–1600 °C, presents an opportunity to lower the energy intensity of metal production. Currently, three types of technologies are under development for utilizing the thermal energy of slags; recovery as hot air or steam, conversion to chemical energy as ...

Experimental investigation on granulation characteristics …

In the early works, airflow velocity was less than 100 m·s −1 [13], which brought about two problems: one was that impact kinetic energy was not enough, the obtained slag particle diameter was larger (the average diameter is about 2–4 mm) [14]; the other one was that air-slag heat exchange was poor, the waste heat recovery rate was …

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 …

A review of waste heat recovery technologies towards molten slag …

The obtained hot air is directly used to generate electricity. In the large-scale industrial trial with slag handling capacity of 18 t/h, the temperature of hot air obtained is 450–500 °C and heat recovery rate is 48%. The slag glassy content is more than 95%, which is similar to that of water granulated slag.

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

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 ...

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 …

Granulation characteristics of molten blast furnace slag …

1. Introduction. Molten blast furnace (BF) slag is one of the main by-products in the iron-making process, and has a yield of 300 kg/t-pig iron [1].The heat contained in molten BF slag (1500 °C) reaches up to 1600 MJ/t.Globally, the production of pig iron was nearly 1153 million t in 2015 [2], and about 345.6 million t of BF slag were produced.The …

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 …

CFD Simulation on Dense Gas-Solid Flow for Blast Furnace Slag …

Download Citation | CFD Simulation on Dense Gas-Solid Flow for Blast Furnace Slag Waste Heat Recovery | In order to recover efficiently the rich heat released from 1450℃ blast furnace slag in ...

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 …

Design and Operation of Dry Slag Granulation Pilot Plant

Experimental results on the dry slag granulator pilot plant have demonstrated that the process can effectively produce glassy slag granules from …

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}, …

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 …

Heat recovery in dry granulation of molten blast furnace slag

In a research and development project undertaken jointly between Ishikawajima-Harima Heavy Industries Co. and Sumitomo Metal Industries, Ltd., a process has been developed for granulating molten slag discharged from blast furnaces, to produce granules utilizable as fine aggregate in the preparation of concrete, while at the same time ensuring …

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