Section snippets Raw materials. The experiment used Portland cement 42.5P.II, produced by Xingfa Cement Co., Ltd., in Beijing, with a specific surface area of 381 m 2 /kg. The granulated blast furnace slag was provided by China Baowu Steel Group Guangdong Shaoguan Iron and Steel Co., Ltd.
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DOI: 10.1016/J.CONBUILDMAT.2011.10.064 Corpus ID: 135517384; Enhance hydration properties of steel slag using grinding aids by mechanochemical effect @article{Zhu2012EnhanceHP, title={Enhance hydration properties of steel slag using grinding aids by mechanochemical effect}, author={Xi Zhu and Haobo Hou and Xuquan …
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Steel slag is a solid waste generated from the steelmaking process. With a very low utilization rate of 30% in China, a high discharging cost of steel slag is inevitable so that it is imperative to dispose of steel slag by new technology. In this study, steel slag was refined by wet-grinding technology to apply on cement.
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After further drying and grinding, the granulated blast furnace slag becomes a fine powder, which is called ground GBFS. The ground GBFS has a maximum particle diameter less than 100 μm. ... This is mainly because the blended system of steel slag-granulated blast furnace slag-cement (SS-GBFS-C) has enough strength development …
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The slag discharged in the process of blast furnace ironmaking, also known as blast furnace slag, can be divided into steel-making pig iron slag, casting pig iron slag, ferromanganese slag, etc. ... In addition to processing blast furnace slag, it can also be used for grinding slag, limestone, calcite, feldspar, marble, etc.
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The quality of raw materials (iron ore, coal, and coke) has a clear impact on the carbon emissions of the hot metal production in steel making. So far, very little work …
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Steel slag and ground blast furnace slag show good wear resistance, which is suitable for improving the abrasion performance of pavement concrete. This work presents an investigation of the activation of Na2SO4, Na2CO3 and Na2SiO3 on the GBFS-SS composite pavement concrete. The results showed that both Na2SO4 and Na2SiO3 …
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The heart of the process is the blast furnace that refines iron ore into iron. The ingredients are heated to nearly 1500 degrees Centigrade to form two components: iron and molten slag. The iron is used to produce steel, and the molten slag is converted to a cement-like material by quenching it with water.
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GGBS is produced by grinding Granulated Blastfurnace Slag to a controlled fineness. There are a number of different methods of grinding granulated blastfurnace slag. Traditionally, standard ball mills have been used, but since the early 2000s the use of roller presses and vertical mills has increased.
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The ladle furnace steel slag, a by-product of converter steel production (Trinec, Czechia), was processed by discharging the molten slag into a slag pan, then cooling it with a combination of air exposure and water spray from a cannon. The slag was subsequently ground to achieve the specific surface area of 5155 cm2/g.
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Although there is a positive synergistic effect between GBFS and steel slag, their large-scale industrial application is hindered by steel slag properties, such as high …
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With respect to the mechanical properties, durability and thermal behavior, ground-granulated blast-furnace slag (GGBS) delineates a rational way to develop sustainable cement and concrete.
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The steel slag contains higher amount of iron and its physical characteristics are similar to air-cooled iron slag. The LD slag is cooled, crushed and screened. The fines are utilised in sinter making and lumps are charged in the blast furnace. The iron content is the major basic difference between BF slag and steel slag. In BF slag, FeO is ...
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Three methods have been widely employed to improve the reactivity of steel slag and concurrently reduce its potential harm on cement-based host materials: (i) physical excitation, which stimulates the hydration activity by physically grinding steel slag into finer powder (Liu et al., 2016), (ii) chemical excitation, which adds chemical admixtures, such …
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Slag was processed by 28 companies servicing active iron and steel facilities or reprocessing old slag piles at about 129 processing plants (including some iron and …
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Ground granulated blast-furnace slag (GGBFS) is a byproduct of making iron and steel, i.e., a fine powder grounded from the glassy, granular material that forms when molten iron blast furnace slag is air quenched with water or steam. ... The granulated slag is further processed by drying and then grinding in a rotating ball mill to a very fine ...
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blast furnace slag (GGBFS). Iron slag and steel slag are used primarily as aggregates in concrete (air -cooled iron slag only) and as asphaltic paving, fill, and road bases; both slag types also can be used as a feed for cement kilns. ... Grinding of granulated blast furnace slag was only done domestically by cement companies. Much of the ...
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The molten slag is later cooled and granulated. Steel slag may also be referred to as steel furnace slag, steel making slag, ... Slag quenched with water, followed by grinding showed very good cementing properties and is used as a secondary cementitious binder for Portland cement or as a primary binder in alkali activated systems.
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Cement & Blast Furnace Slag. The coordinates of the grinding table diameter and number of rollers can be read off from the table. The x-coordinate indicates which product throughputs can be generated using the respective mills. The width of the fields is a measurement of the output factor.
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The wet-grinding specimens presented a higher hydration heat than that of raw steel slag specimens, and the microstructure of 3 μm-40% (3 μm steel slag mixed with cement as a dosage of 40%) is ...
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Grinding of granulated blast furnace slag was only done domestically by cement companies. Supply constraints appear to have limited domestic consumption of GGBFS in recent years. Although ... steel furnace slag as 10% to 15% of crude steel production. In 2019, world iron slag production was estimated to be
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Steel slag is the main solid waste generated in the steel-making process, accounting for 15 to 20% of crude steel output [1].China's crude steel output in 2021 was 1.035 billion tons [2], more than half of the global crude steel output (1.9505 billion tons) [3], and the steel slag output exceeded 120 million tons.In contrast, the comprehensive …
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Blast furnace slag (BFS) is a by-product of iron manufacturing in blast furnaces fed by a mixture of iron ore, limestone, and coke [70,71]. In the manufacturing of iron, iron scrap, …
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Introduction. Basic oxygen furnace steel slag could be regarded as a kind of cementitious material with low activity. The hydration active phase of it contains dicalcium silicate (C 2 S), tricalcium silicate (C 3 S), tetracalcium aluminoferrite (C 4 AF), and dicalcium ferrite (C 2 F) which are similar to cement, when C 3 S and C 2 S are reached …
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1.2 Electric Arc Furnace (EAF). An electric arc furnace (EAF) is a furnace that heats a charged material by means of an electric arc. Figure 11.2 shows a typical EAF process for stainless steel manufacturing using scrap material. The EAF normally comprises of three graphite electrodes, molten bath, tapping spout, refractory movable …
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The Effect of Removing Hard‑to‑Grind Minerals from Steel Slag on Ecient Grinding and Hydration Activity Jianqi Zhao1,2 · Wentao Hu 1 · Wen Ni 1 · Jiuchuan Guo1 · Wan Zhu 1 · Shasha Su1 Received: 25 November 2022 / Accepted: 30 July 2023 / Published online: 22 August 2023 ... Blast furnace slag (BFS) is a by-product produced in the ...
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The abrasiveness of GBS and pozzolan requires high wear-resistant liners. For VRMs grinding very abrasive materials, such as slag, hard-facing is an economical alternative to changing wear parts and is suitable for high-chrome castings, optimizing the grinding process and saving refurbishment costs. 8
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It is found that the removal rate of hard-to-grind minerals in steel slag is the highest when steel slag enters magnetic separation particle size of 1 mm and magnetic field strength …
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Introduction. 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 [Citation 1].Steel slag mainly refers to the blast furnace slag and converter slag produced in the process of iron making and steel making, and with the …
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Grinding is usually used to increase the specific surface area of steel slag to improve its activity. However, due to the large amount of hard-to-grind minerals in steel slag, a large amount of energy is wasted in the grinding process. Therefore, the current investigation aims to remove the hard-to-grind minerals in steel slag as much as possible to explore …
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