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The present paper investigated the process of the slag wool fabrication using high temperature blast furnace (BF) slag modified by coal ash (CA). The liquidus temperature and viscosity of the slag system …
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 …
High-temperature waste heat from the iron and steel industry, as shown in Fig. 1, are mainly stored in products, molten slag and waste gas [2].Molten slag, as a kind of by-product during the steelmaking process, is exhausted in extremely high temperature and thus, it carries a great deal of high-grade heat accounting for 10% of waste energy …
Waste heat recovery from high temperature slags represents the latest potential way to remarkably reduce the energy …
@misc{etde_5512250, title = {Development of a BOF slag blast granulating and heat recovering system} author = {Ando, J, Tajiri, S, Ijima, F, Nakahara, T, Ichimura, S, and Kondo, M} abstractNote = {Mitsubishi Heavy Industries started in 1977 a joint study with Nippon Kokan K.K. for the development of a BOF slag blast granulation and heat …
With the innovative approach presented in this work, it is possible to recover thermal heat from liquid slags. The process concept consists of a slag tundish and four …
absorption, Heat recovery, Steelmaking slag . Abstract . We will introduce the recent development of a ew slag heat recovery system, which consists n of a roll-type continuous slag solidification process and a slag heat recovery process. This work is conducted as one of the COURSE50 national projects in Japan. In this process, the molten slag
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 …
The physical method is the main method of waste heat recovery from BFS (Sun et al., 2015), which concentrates on the development of various granulation technologies through which the molten slags are granulated into small particles, and the thermal heat in the slag is exchanged with a heat transfer medium (air, steam and …
Junxiang et al. (2015) used water as the heat transfer medium to recover (300 to 700 °C) slag waste heat by a tubular heat exchanger to obtain more than 55% waste heat recovery efficiency with a ...
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 …
In this line, this work presents the main outcomes of the investigation carried out in the search of a technical solution for heat capture and reutilization from one of the …
waste heat recovery process of liquid slag into dry centrifugal granulation process and waste heat recovery process. After dry centrifugal granulation, the temperature of blast furnace slag particles was about 900°C. Then the particles entered the packed bed for heat transfer, resulting in hot air of 500-600°C [5].
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The steel industry is an energy-intensive and CO2-intensive industry and the greenhouse gas (GHG) emission in the steel industry was more than 2.95 billion tons in 2012, which faces the great…
Abstract: Based on the research in the field of the slag waste heat recovery at home and abroad, a new-style technical scheme that the slag waste heat was recovered to preheat the gas based on the fluidized bed was put forward in the paper. The scheme could not only recover the slag waste heat to preheat the blowing-in gas, but also make up the current …
Molten slag exhausted with critically high temperature of about 1450–1550 °C is a potential resource of energy and raw materials. Water quenching is a traditional …
In order to recover efficiently the rich heat released from 1450 blast furnace slag in the fluidized bed, we find the best control parameters by seeking the relationship among the control parameters, and their influence on heat transfer rate between gas and slag. This paper focus on CFD simulation of the fluidized bed heat transfer process. It …
5.1 Part I: Blast Furnace Slag Atomization at Full-Scale. Ecomaister began studying the slag atomization of iron-making blast furnace (BF) slags in 2013 and demonstrated the production of atomized BF slags at a laboratory scale (Table 1, POSCO-2013 and SSAB-2015).Early laboratory scale experiments that remelted BF slags and …
@misc{etde_20246612, title = {Heat recovery from molten blast furnace slag in a fluidized bed} author = {McQueen, M, Pickles, C A, Sridhar, R, and Lakshmanan, V I} abstractNote = {A method for heat recovery from molten blast furnace slag was investigated using a fluidized bed and a molten LiCl-KCl salt mixture. The effect of air …
The slag waste heat recovery is through a heat transfer medium like air, steam, or molten salts. ... Such limitations or fears may be preventing the widespread acceptance of BOF slag as an aggregate in India, despite having a branded product, Tata Agretto. It is a sized and naturally aged BOF slag (with fCaO < 2%) ...
@misc{etde_5473583, title = {New granulation technique for heat recovery from molten slag} author = {None} abstractNote = {A method is described for treating molten slag involving granulation and quenching in a fluidized bed. Approximately 65% of the energy content of the slag is recovered, and possibilities to recover up to 80% exist.
India: Orient Cement has successfully commissioned Phase 2 of the new waste heat recovery (WHR) plant at its Chittapur cement plant in Karnataka. Reuters has reported that the new phase raises WHR power capacity at the plant to 10.1MW.
The need for heat recovery from molten blast furnace slag was analysed. Because of the physical properties of slag and the non-continuous operation of blast furnace, heat recovery from molten slag was difficult. Rotating drum granulation, stirring granulation, air blast granulation, continuous casting, centrifugal granulation and chemical reactions …
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 …
slag is being formed rises by approximately 30°C. Since this is within the design range of 70°C or less, the designed cooling capacity can be obtained. 3. Development of Slag Heat Recovery Process 3.1 Design of Slag Heat Recovery Pilot Plant The slag heat recovery pilot plant which was built in this development is a counterflow packed bed ...
Here we report a novel approach to extract the waste heat and iron from high temperature steel slags (1450–1650 o C) produced in the steel industry, i.e., …
Positive contributions of steel slag in reducing CO 2 emissions were summarized.. Reduction potential of CO 2 for steel slag waste heat recovery is 73.15–111.8 kg·t −1.. Reduction potential of CO 2 for steel slag carbon sequestration is 77.5–258.5 kg·t −1.. Reduction potential of CO 2 for steel slag resource utilization is 340–826 kg·t −1.. …
The system of dry, drum-ball granulation of slag with the possibility of heat recovery is also being piloted . However, based on a critical analysis of the published research, it can be noted that the major shortcoming of these technologies will be reduced productivity, high intensity of failures, and high price of repair. ... Eng. India Ser. D ...
India: The total new waste heat recovery (WHR) unit capacity of cement producers is expected to reach 175MW in the two years ending on 31 March 2022. Rating agency ICRA has valued the total investment in new WHR units over the period as up to US$230m, according to the Press Trust of India.