Effect of Oily Sludge Treatment with Molten Blast Furnace Slag …
The reconstituted water-quenched blast furnace slag still has good activity, and it will not affect the further use of the slag after pyrolysis (BFS-P). Keywords: blast furnace slag; heavy metals; oily sludge; pyrolysis and digestion. Grant support No. 51974054/National Natural Science Foundation of China ...
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Water-Based Quenching: Capability Spotlight | Paulo
Water quenching is a widely used quenching method in which heated metal parts are rapidly cooled by immersing them in a liquid, water-based quenching media. ... Because water-based quench is the most severe quench option, you can generally process much larger parts than you would be able to using an oil quenchant. …
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Using water as a quenchant | Thermal Processing Magazine
Depending on how hard the water is, as the water evaporates from quenching or just low humidity, the inorganic content can change the quenching …
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Study on Copper Recovery of Water-quenched Slag from …
Factors affecting flotation of water-quenched slag from a copper smelting plant in Hubei province,such as grinding fineness,pulp density,pH value and the reagent system,were studied.The results indicate that the best flotation efficiency was obtained with a grinding fineness of 95%-0.074 mm,a pulp density of 30%,a pH value of 7.0 and reagent …
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Electric Arc Furnace Steelmaking and Slag Formation, …
The growth of electric arc furnace (EAF) steelmaking in North America has occurred mainly in the past 40 years due to low electricity prices, an abundance of steel scrap (especially near large population centers), and the development of mini and macro steel mills based on metal recycling. Scrap availability and price has made steel …
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High-temperature modification and air-quenching …
quenching and water-cooling to deal with steel slag and realized industrial production [13], through which the uti-lization rate of steel slag has been improved significantly. In addition, due to the advantages of high sphericity and good stability, air-quenched steel slag has been applied to abrasive [14] and concrete fine aggregate [15 ...
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An Overview of Utilization of Blast Furnace and Steelmaking Slag …
As a result, dry granulated slag was reported to have similar hydration properties with water quenched slag. However the long-term strength of dry granulated slag mortar turned out to be higher than ordinary cement mortar which was attributed to the higher reactivity on slag particle surfaces [46]. ... (EB- PVD). Deposition of hard ceramic ...
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Pretreated water-quenched-manganese-slag slurry for …
Presently, researches on the use of low-cost pulp or slag for desulfurization and denitrification has attracted much attention globally. However, the efficiency of the NO x conversion remains low and has a short duration. Therefore, we tried to activate the water-quenched-manganese-slag (WQMS) through the pretreatment method of …
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FAQs
Molten slag is tapped from a blast furnace, rapidly quenched with water ("granulated"), dried and ground to a fine powder. The rapid quenching "freezes" the molten slag in a glassy state, which gives the product its cementitious properties. For more information, see SCIC #1, "Slag Cement.
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How much does Quenching increase Cast Bullet Hardness?
When loading magnum ammunition I generally aim for 18BHN or higher, so that should give you some insight into just how soft these air-cooled bullets are. ... I was genuinely surprised by just how much of a difference water-quenching made in my bullet hardness. Before reading the results, I'd suspected the difference might by two or three ...
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Utilisation of water quenched slag as fine aggregate in alkali
This study investigates the performance of water-quenched slag (WQS) fine aggregate in blended ground granulated blast furnace slag (GGBFS) and fly ash …
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Effect of cooling technique of blast furnace slag on the …
The results demonstrated that the particle size distribution and XRD pattern of dry granulation slag were similar to those of slag obtained from water quenching.
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Effect of Oily Sludge Treatment with Molten Blast Furnace Slag …
The reconstituted water-quenched blast furnace slag still has good activity, and it will not affect the further use of the slag after pyrolysis (BFS-P). Blast furnace slag, which is the main by-product of the ironmaking process discharged at 1450 °C, contains high-quality sensible heat, while oily sludge is the main solid waste produced in the ...
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Comprehensive utilisation of blast furnace slag
The water quenching granulation process, also known as the wet treatment process, is a process that uses a high-pressure water stream to quickly cool the blast fur-nace slag in …
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Development of Refractory Material from Water Quenched …
Ferrochrome slag is generated during the manufacturing of ferrochrome metal, then slag is quenched in water. Generally, these slags are utilized for different applications in ceramic, refractory ...
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Preparation of water-quenched manganese slag and fly ash …
Cement (CT): Conch P·O42.5 grade cement, produced in Xingan, Guangxi. UMA: Water-quenched manganese slag and fly ash are mechanically mixed at a ratio of 1:1 for 90 min (fly ash is taken from Guigang, Guangxi, and the water-quenched manganese slag is taken from Longda, Quanzhou, Guangxi); SF :Beijing. The chemical …
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Effect of cooling technique of blast furnace slag on the …
The molten slag is suddenly quenched with water and subjected to cooling and turns into an amorphous product like sand with high content of silica and alumina [18,19].
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Utilisation of water quenched slag as fine aggregate in …
Request PDF | On Nov 20, 2018, Xinyu Cong and others published Utilisation of water quenched slag as fine aggregate in alkali activated mortar | Find, read and cite all the research you need on ...
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Utilisation perspective on water quenched and air-cooled …
The cooling measures (such as, air-cooled, water and air quenching, and steam quenching) impact the crystallization process of minerals in iron slag. The rapid cooling process (e.g., water ...
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(PDF) Effect of Cr-solidified/stabilized Water-quenched Slag …
The results demonstrate that the addition of sludge increases the grindability of water-quenched slag, with a specific surface area increasing from 971m²/kg to …
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An approach towards utilization of water-quenched blast furnace slag
The sample of water-quenched BFS was obtained from an iron and steel smelting factory in Panzhihua, Sichuan, China, with a particle size of less than 5 mm, and its XRD pattern is shown in Fig. 2.It is clear that the crystallization degree of water-quenched BFS is inferior, with only a few CaTiO 3 diffraction peaks (PDF#77-0182). …
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A Review of Granulation Process for Blast Furnace Slag
1—clinker ejector, 2—water slag ditch, 3—water slag tank, 4— distributor, 5—drum filter, 6—buffer tank, 7—collecting tank, 8—thermal basin, 9—cooling tower,10—water tank, 11—belt
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A Review on the Carbonation of Steel Slag: Properties, …
Tu et al. conducted a thermodynamic simulation on the carbonation process of water-quenched steel slag using the thermodynamic modelling, which ... Generally, increasing temperature can promote the dissolution of active substances in steel slag and the carbonation reaction rate between them and CO 2 molecules [77,78]. More calcium …
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Reactivity and Hydration Property of Synthetic Air Quenched Slag …
Air quenched slag is processed by a fast air cooling method which is developed with the advantages of recovering heat from molten slag and water conservation compared to the water quenching method.
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A technical guide to quenching | Thermal Processing …
For example, the purpose of quenching A356 Al castings is to keep the Mg2Si from forming precipitates. If done correctly, this yields maximum strength and good elongation in castings. Quenching of steel is generally accomplished by immersion in water, oil, polymer solution, or salt, although forced air is sometimes used.
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Fabrication of iron doped titanium dioxide photocatalytic …
Metallurgical solid waste blast furnace water quenched slag (WBFS) was employed as carrier materials to prepare Fe–TiO 2 /WBFS composite photocatalyst using a sol-gel method for improving both the photocatalytic activity and the high-value utilization of metallurgical solid waste. The Fe 3+ doping technology was adopted to increase the …
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Slag Cement and Concrete Pavements
Slag is a byproduct of processing iron ore to iron and steel in a blast furnace. Molten slag, which floats on the top of the molten iron ore, is separated and granulated. Granulation is the rapid quenching with water of the molten slag …
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A Review of Granulation Process for Blast Furnace Slag
Molten slags of blast furnace is a second resources with great value of 1600~1 800 MJ sensible heat per ton. At present, water-quenching process plays a leading role in recovering waste heat of ...
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Frontiers | Research on formulation optimization and …
It is generally believed that water-quenched slag is a potentially active vitreous structure. This vitreous body contains a high crystallinity energy, but the hydration speed in pure water is very high. Add water slowly, because the water-quenched slag will form a dense and indeterminate acidic film on the particle surface after contact with ...
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Utilisation of water quenched slag as fine aggregate in …
This study investigates the performance of water-quenched slag (WQS) fine aggregate in blended ground granulated blast furnace slag (GGBFS) and fly ash (FA) alkali-activated materials (AAM). Mortar samples derived from the corresponding concrete mix proportion were synthesised in this study, where river sand and WQS constituted …
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