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The smelting process of blast furnace is carried out in the shaft furnace of a closed countercurrent reactor and heat exchanger. The complex physical changes and chemical reactions are completed in the process of the countercurrent movement of the charge and gas in which the raw materials containing iron oxide (sinter, pellets, etc.), …
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In some studies, it has been demonstrated that using a composite mineral admixture known as ground-granulated blast-furnace slag-steel slag composite binder can increase the fluidity of fresh …
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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 of iron-ore, coke and limestone, and operated at a temperature of about 1,500°C. ... These keywords were added by machine and not by the authors. This process is experimental and the …
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The dataset in the database contains eight input variables (cement, blast furnace slag, fly ash, water, superplasticizer, coarse aggregate, fine aggregate, and age) and one output variable (concrete compressive strength). Then, the correlation of the eight input variables was analyzed, and the results showed that there was no high correlation ...
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Slag Crusher Machines play a critical role in the steel recycling process by crushing and processing slag, a byproduct of steel production. These machines help to reduce waste and environmental …
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When the blast furnace method is usedto smelttheironconcentrate, thetitaniumresourcesenter the blast furnace slag, forming Ti-bearing blast furnace slag. This can a erwards be divided into water-quenched slag and air-cooled slag, according to a cooling method.1 The applica-tions of Ti-bearing blast furnace slag mainly include …
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We use fly ash from coal-fired power plants and blast furnace slag as an alternative supplementary material for concrete. But those byproducts are going away …
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Blast Oxygen Furnace (BOF) slag represents one of the largest waste fractions from steelmaking. Therefore, slag valorisation technologies are of high importance regarding the use of slag as a …
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A comprehensive study on the impact of nano-silica and ground granulated blast furnace slag on high strength concrete characteristics: RSM modeling and …
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The potential-pH diagrams of the main components of Ti-bearing blast furnace slag (air-cooled slag) at 298.15 K (25 °C) and an ion activity of 1.00 were drawn by thermodynamic calculation. ... After crushing and ball milling, powder with a particle size of less than 0.150 mm is obtained. ... Pure water produced by an ultrapure water machine ...
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1. Introduction. One of the major byproducts of the steel industry is blast furnace slag (BFS). The massive accumulation of slag solid waste not only brings a heavy economic burden to steel companies, but may also adversely affects the local soil, groundwater and atmosphere, endangering the surrounding environment [1].As a result, …
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Ti-extraction blast furnace slag (TEBFS) is the metallurgical solid waste generated during titanium extraction by high-temperature carbonization and low-temperature selective chlorination process in China. The high chlorine content in slag restricts its large-scale utilization in engineering materials. To solve this problem, this …
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Shi 35 used Na 2 SiO 3 to activate the LF slag-ground granulated blast furnace slag (GGBS) mixture to replace cement in mortars. The Na 2 SiO 3-activated slag exhibited better cementitious properties compared to the non-activated slag mixture. Under normal hydration conditions, γ-C2S is an inert material, and the hydration and strength ...
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1. Introduction. Titanium-bearing blast furnace slag (Ti-BFS) is a by-product produced from the process of ironmaking using vanadium-titanium magnetite (Wang et al., 2018a).Currently, about 70 million tons (Zhou et al., 2018) of Ti-BFS have been dumped, and is still increasing by more than 3 million tons per year in China …
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The complex of machines allows to sequentially perform taphole drilling and further plugging to eliminate hard manual labour and protect taphole lining from extensive wear. ... If temporary slag taphole freezing is required, the stopper seals it with an internal water-cooled copper tip. ... Innovative solution for automated and safe loading of ...
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1.4.2. The basic oxygen furnace (BOF) The BOF process forms part of the primary steel production route, which also incorporates the BF process. In a BF, the iron ore, limestone and fuel are continuously supplied through the top section of the furnace, while heated air is forced into the lower section (Geerdes, Toxopeus, & Van der fliet, 2009).The end …
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Chapter 5—Blast-furnace slag aggregates, p. E1-21 5.1—Blast-furnace slag 5.1.1—Definition 5.1.2—Properties 5.1.3—Availability Chapter 6—Lightweight aggregates, p. E1-21 ... produced by crushing natural stone. Crushing, screening, and washing may be used to process aggregates from either sand and gravel deposits or stone quarries ...
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To reduce CO2 emissions due to soaring productivity of cement, the industry can use Ground Granulated Blast Furnace Slag (GGBFS) as a substitute for cement.
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In 2021, approximately 67% of the metallic units for steel production comprised pig iron produced in a blast furnace (BF) and close to 6% consisted of directly reduced …
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Ground granulated blast-furnace slag (GGBS) is a green construction material used to produce durable concrete. The secondary pozzolanic reactions can result in reduced pore connectivity; therefore, replacing partial amount of Portland cement (PC) with GGBS can significantly reduce the risk of sulfate attack, alkali–silica reactions and …
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after the blast furnace slag has been water quenched in front of the furnace, the slag-water mixture is concen-trated, filtered and dewatered, and then the filtered ... slag tank through the conveying tape machine. The filtered water is sent to the water slag punching box after a series of purification and cooling operations to
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The technological factors required to improve the operational properties of granulated metallurgical slags demanded in the building industry have been analyzed. In order to satisfy these factors, a new technology for hydro-vacuum granulation of slag melts (HVG) has been developed. It is shown that the main advantage of the proposed HVG …
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Blast furnace slag was about 50% of the tonnage sold and accounted for 88% of the total value of slag, most of which was granulated. Steel slag produced from basic oxygen and electric arc furnaces accounted for the remainder of sales. Slag was processed by 28 companies servicing active iron and steel facilities or reprocessing old
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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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Blast furnace slag cement is the mixture of ordinary Portland cement and fine granulated blast furnace slag obtained as a by product in the manufacture of steel with percent under 70% to that of cement. Ground granulated blast furnace slag cement (GGBFS) is a fine glassy granules which contain cementatious properties.
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The iron and steel industry (ISI) is pursuing technology breakthroughs to accelerate the transition towards carbon neutrality. Deep cut of CO 2 emission involves with not only technological revolution of producing iron and steel, but also exploiting energy in byproducts and off-process wastes. Molten blast furnace slag (BFS), one of the largest …
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When a jaw crusher is equipped with the ASC system, the crushing forces are carried by massive hydraulic cylinders mounted into the rear header casting. If an uncrushable object enters the crusher cavity and …
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Slag atomising technology (SAT) is a new system adopted (invented) to atomise molten slag out of electric arc furnaces in a most effective way, and is most …
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In this research, compressive strength of high-performance concrete with high volume ground granulated blast-furnace slag replacement is predicted using boosting machine learning (BML) algorithms ...
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When smelting each ton of pig iron, approximately 500 kg of blast-furnace slag is formed and requires recycling. Air-cooled blast-furnace slag can be used for the manufacture of slag aggregate for the pavement subbase layers, as an alternative to natural stone aggregate. The wide use of slag in this area is limited by its high water …
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