Driving Energy Efficiency in Heavy Industries – Analysis
Global energy efficiency is expected to improve by only 0.8% in 2020, roughly half the rates for 2019 (1.6%) and 2018 (1.5%) and well below the rate of 3% needed to achieve global climate and energy goals. The industry sector, including iron, steel, cement, chemicals and petrochemicals, accounts for over 30% of global total primary energy …
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Efficiency of high energy over conventional milling of granulated blast
Efficiency of high energy over conventional milling of granulated blast furnace slag powder to improve mechanical performance of slag cement paste . × ...
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Study on the particle morphology, powder
Presently, there are two types of grinding equipment generally employed in the production of ground granulated blast furnace slag: the ball mill and the vertical roller mill [30], [31]. The ball mill is a mature technology that …
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Recovery of Zinc and Iron from Steel Mill Dust—An Overview of …
The reduction of iron oxide in the shaft furnace starts when the temperature of the reaction zone rises to 900 °C. Then, the sponge iron is generated with the temperature rising to 1400 °C . Finally, the reduced iron and slag are melted into a liquid state at high temperature and then flow out from the shaft furnace through a siphon system.
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Efficiency of high energy over conventional milling of granulated blast
This work consists of producing a pre-geopolymer powder (PGP) precursor by mechanosynthesis process. Blast furnace slag (BFS) was chosen as an aluminosilicate source and was dry-mixed with sodium ...
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Efficiency of high energy over conventional milling of …
This work aims at bridging the efficiency of ball milling of granulated blast furnace slag (GBFS) to the structural andmechanicalpropertiesofslag cement pastes. …
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Frontiers | Study on the relationship between the particle size
This study adopted the Rosin-Rammler-Bennett (RRB) equation to model the particle size distribution (PSD) of ground granulated blast furnace slag (GGBFS) and prepared four groups of GGBFS powders with a characteristic particle size De = 8–20 μm and uniformity coefficient n = 0.9–1.4 by means of grading and combining blast furnace …
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Full article: Comprehensive utilisation of blast furnace slag
Comprehensive utilisation of blast furnace slag. China is the world's largest steel producer, with the China Iron and Steel Association estimating that the country's crude steel production in 2022 will be 935 million tonnes [1]. In 2017, the metallurgical slag output of iron and steel enterprises in China reached more than 440 million tons ...
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Reactivity Alteration of Granulated Blast Furnace Slag by …
Augmenting granulated blast furnace slag (GBFS) content in Portland Slag Cement (PSC) beyond the conventional limit of 70% is the stimulus for this study. Such enhancement other than bringing down the carbon footprint of cement conserves natural resources. However, beyond 70% slag incorporation, early strength gain of PSC is …
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Reactivity Alteration of Granulated Blast Furnace Slag by …
This study investigates the effect of clinker replacements with granulated blast furnace slag (GBFS) in Portland Slag Cement (PSC) past the permissible limit of …
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Study on the particle morphology, powder
The degree of sphericity of the blast furnace slag powder particles decreases with the particle size and is lower when produced by vertical roller milling …
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Slag recycling
The terms blast furnace slag (BFS) and granulated blast furnace slag, as well as LD slag and electric furnace slag are used for finer distinctions. With high-quality iron ore grades with an iron content of 64 to 67 %, a blast furnace typically produces about 0.25 to 0.30 t of slag per t of pig iron.
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Effectiveness of Jet Milling for Producing Superfine Powders from Blast
The paper examines the effect of ball (drum) grinding and jet milling on the particle size distribution and specific surface area of the powders produced from blast-furnace slag. The effectiveness of jet milling, providing relatively equal powder particles (more than 85% of the fractions is 0–10 μm in size), is shown. Decrease in the average …
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Ground Granulated Blast Furnace Slag | SpringerLink
3.1 Introduction Ground granulated blast furnace slag (GGBS) is a by-product from the blast-furnaces used to make iron. Blast-furnaces are fed with controlled mixture …
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Research Progress on Controlled Low-Strength Materials: …
2.1.1. Overview of Blast-Furnace Slag . Blast-furnace slag is a silicate melt formed by the reaction of substances, such as SiO 2 and Al 2 O 3, contained in Fe ore with CaO and MgO in flux during raw iron melting. Air-cooled slag is obtained from a melt as a result of air-cooling treatment and is generally used as a slag aggregate.
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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 …
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Application of a blast furnace slag carrier catalyst in flue gas
Blast furnace slag (GGBS) is a main industrial by-product during the process of blast furnace smelting of pig iron. 30–32 There are CaO, 33 MgO, 34 SiO 2, 35 Al 2 O 3, 36 Fe 2 O 3, 37 and other oxide compositions accounted for more than 80%, so it is a type of mineral resource with high recycling value. 38–42 With the rapid development of ...
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Fly ash and slag
The degree of granulated blast-furnace slag utilization in the composition of cement and concrete is over 90%, whereas the fly ash is about 30% [2]. The relatively low level of fly ash disposal use results from the variable quality [2] as well as from different coal combustion techniques, e.g. combination of coal combustion with the dry ...
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Efficiency of high energy over conventional milling of granulated …
This work aims at bridging the efficiency of ball milling of granulated blast furnace slag (GBFS) to the structural and mechanical properties of slag cement pastes.
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Advances in Understanding the Alkali-Activated Metallurgical Slag
This paper summarized and reviewed the mechanism and macro-performance of alkali-activated metallurgical slag, including steel slag, copper slag, ferronickel slag, and lead-zinc slag. Better activated method and alkali-activator are still needed to be developed to improve the performance of the metallurgical slag with low …
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Hydrometallurgical Leaching Behavior and Kinetic Modeling of Blast
With the aim of utilizing blast furnace slag in the iron and steel industry at low cost, pollution free, refinement, and high value added, an entirely subversive technical route was presented, which was a novel synergistic utilization of slag to produce zeolite and hydrotalcite-like compounds. The object of this study is to obtain the optimal operating …
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Study on the particle morphology, powder
Reasons for this effect are as follows: (1) The ball-milled slag has a wide PSD and a better stack performance. The powder also contains an abundance of fine powder at the micropowder grade, which increases the initial hydration speed. (2) The ball-milled …
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Efficiency of high energy over conventional milling of granulated …
Abstract. This work aims at bridging the efficiency of ball milling of granulated blast furnace slag (GBFS) to the structural and mechanical properties of …
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Efficiency of high energy over conventional milling of granulated blast
Effi- ciency of high energy over conventional milling of granulated blast furnace slag powder to improve mechanical performance of slag cement paste. Powder Technology, Elsevier, 2017, 308, pp.37-46.
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A Review of the Influence of Steel Furnace Slag Type on the …
The slag from this process—blast furnace slag—can be used as an aggregate in the form of air-cooled blast furnace slag (ACBFS), but is commonly used as a supplementary cementitious material (SCM) in the form of ground granulated blast furnace slag (GGBFS) [1,2,3,4,5]. However, blast furnace slags will not be covered in this review.
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Titanium Extraction from Titania-Bearing Blast Furnace Slag: A …
The blast furnace smelting process for vanadium titania-magnetite is shown in Fig. 1.The low concentration of TiO 2 with about 1.5 wt.% in the primary mineral can be enriched into titania-bearing slag with more than 20 wt.% TiO x, 29,30 as shown by the composition range in Table I; other oxides including CaO, MgO, SiO 2, and Al 2 O 3 are …
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What Are the Uses of Blast Furnace Slag (BFS)?
Blast furnace slag is a by-product of the iron and steel industry. When pig iron is smelted in a blast furnace, the flux is added to the raw materials from the blast furnace in addition to iron ore and fuel (coke). When the furnace temperature reaches 1400-1600 ℃, the lime in the flux reacts with the aluminate, silicate and coke ash in the ...
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Multiobjective optimization of the production process for ground
The production process of ground granulated blast furnace slag (GGBS) aims to produce products of the best grade and the highest yields. However, grade and yields are two competing objectives which can not be optimized at the same time by one single solution. Meanwhile, the production process is a multivariable strong coupling …
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Mechanical activation of silicomanganese slag and its
Powder Technology. Volume 251, January 2014, ... This metallurgical slag is different in chemical composition and properties compared to blast-furnace slag produced in steel plants that is widely used in slag cement production. ... The binary mixes were then inter-ground in a laboratory ball mill to four different Blaine specific surface areas ...
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Fly ash and slag
The GBSF temperature at the blast furnace output reaches about 1400 ÷ 1450 °C and it is cooled slowly by means of air or quickly by waterjet. The latter process is called granulation and leads to the formation of a product called granulated blast furnace slag (GBFS) and this form of slag is used in the composition of cement and concrete.
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