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The metallurgical waste slag is formed after high temperature reduction of chromite by pyroelectric furnace at 1700 • C which uses carbon as a reducing agent [1]. According to the carbon …
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The pyrometallurgical process mainly focuses on the iron and copper content recovery as high-grade magnetite, metallic copper (or matte), or iron-enriched alloys. ... extraction was conducted by contacting aqueous and organic solutions in a 60 mL pear-shaped funnel and mechanical shaking. The concentrations of metal ions in the …
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With the rising costs of high-activity materials like slag (Han et al. 2017), the focus has shifted to economically viable alternatives such as steel slag (SS) and ceramic powder (CP). SS, a by-product of the iron and steel industry, contributes significantly to China's annual production (Francisca and Glatstein 2020 ; Cui et al. 2021 ...
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This slag, if cooled to 150 °C through the proposed system, can generate as much as 106 Nm 3 of CO + H 2 (molar ratio of H 2 :CO = 3:1) exiting the reactor at 1100 °C. This would represent chemical energy recovery of 0.24 GJ/ton crude steel (0.81 GJ/ton slag) or 51% of the slag thermal energy.
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For instance, anhydrous calcium silicates and aluminates of slag could be potentially reactive with water at room temperature [40, 45]. BFS (iron slag) is particularly suitable for high-performance concrete because the hardening (hydration ) of concrete with BFS is generally slower than that with Portland cements .
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Slag. Article PDF Available. High Temperature Rheological Characteristics of Iron and Steel Making Slag and its Waste Heat Recovery-A Review. November 2020. …
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Pig iron and molten slag accumulate at the hearth of the BF, and the slag is positioned above the pig iron, as its density is lower than iron (Ito et al., 2014). There are some difficulties associated with draining the slag from the BF as it has high viscosity while in the lower temperature zones of the furnace this viscosity increases ( Ito et ...
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Application: Tin, tungsten, gold, silver, lead, zinc, tantalum, niobium, titanium, manganese, iron ore, coal, etc. Advantage: Lightweight and corrosion-resistant …
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They are effective in processing precious and base metal, rare metal and non-metallic minerals. The Shaking Tables have three distinct deck designs available. The course …
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The H-slag and B-slag present moderate adhesion portions of 24.1% and 10.3%, respectively. The high adhesion portion of the T-slag is ascribed to the high TiO 2 content of approximately 15%, which is anticipated to affect the thermophysical properties such as viscosity, thermal conductivity, etc. Download : Download high-res image (247KB)
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As a by-product in the steelmaking process, the temperature of molten steel slag can reach 1450–1650 °C and enthalpy can reach 2000 MJ t −1, which is equivalent to 61 kg coal. The waste heat of molten steel slag accounts for 7% of the high-temperature waste heat in the iron and steel industry [5,6,7]. Therefore, the recycling of waste heat ...
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For example, the separation temperature of Slag A containing sample decreased along the liquidus line of Fe–C to around 1573. Fig. 9. Effect of slag melting temperature on the …
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reaction behavior of the complex nickel slag exposed to water vapor at high temperature has not been investigated. Some research has proposed an iron recovery method for the recovery of iron in the form of magnetic iron oxides (Fe 3O 4). 13,14 Because the iron-bearing samples consisted of mainly magnetite and hematite, the magnetite has ...
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Therefore, to fully understand the role of Ti 4+ in the silicate melts, the effects of TiO 2 content ranging from 20 to 34 mass pct and MgO/CaO content ranging from 0.32 to 0.65 on high-temperature structure of the CaO-SiO 2-TiO 2-MgO-Al 2 O 3 were investigated using Raman spectroscopy. To combine this structural information obtained …
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The heat recovery from high temperature slags (1450–1650 °C) from the metallurgical process represents one of the greatest potential to reduce the carbon emission in the steel industry (460 million tons of blast furnace slags (BFS) and 150 million tons of steel slags (SS) in 2012). ... Table 1 The basic constraints of slag heat recovery ...
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making slag at high temperature have been investigated. In this work, 50 kg-scale experiments which simulated rotary kiln were conducted to investigate the separation behavior between slag and metal. Main results are as follows. (1) Molten iron was tapped out from the experimental furnace under the condition that more than 86% iron was …
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The reduction percentage of iron oxide was approximately 82 % under roasting conditions of 1.5 h at 1373 K. Based on these results, a novel scheme for copper slag utilization is proposed that involves chlorination roasting for nonferrous metal removal, reduction roasting for iron oxide reduction, and melting to obtain molten iron and …
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The high-temperature slag contains high-degree exergy at the levels of thermal energy and material resources, offering a large internal recovery potential and the revenues that could be re ...
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Cita on: Okorie O (2020) High Temperature Rheological Characteris cs of Iron and Steel Making Slag and its Waste Heat Recovery-A Review. Adv Metallurg Mater Eng 3(1):104-116 Okorie.
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Abstract. An environmental procedure to extract titanium components and metallic iron from Ti-bearing blast furnace slag is accomplished via three steps, which …
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The changes in contact angles between the iron drop and the alumina substrate were followed as functions of temperature and varying partial pressures of oxygen in the temperature range 1823 to ...
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where V is the average settling velocity of iron (m/s); r 1 is the average radius of liquid iron droplets (m); g is gravity acceleration (m/s 2); ρ 1 and ρ 2 are the density of iron and molten slag (kg/m 3); and η 2 is the average viscosity of molten slag (p a s). According to the references [5, 7, 8], when the temperature is 1733 K, the viscosity of …
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High alumina slag is widely found in pyrometallurgical extractions of ferronickel, ferrochromium, and platinum group metals. The effects of MgO, Al2O3, and CaO/SiO2 on the sulfur distribution ratio between high-alumina CaO–SiO2–MgO–Al2O3 slag and carbon-saturated iron were investigated. The slag consisted of Al2O3 content …
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The addition of CaO plays a positive role in the water vapor oxidization of fayalite in nickel slag to produce magnetite. A sample of basicity 0.6 with a water vapor flow rate controlled at 50% reacted at 1000°C for 40 min results in a product with an iron recovery ratio of 71.1% and an iron grade of 56.4%.
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The results showed that the BWI of the slag was 13.5 kWh/t and the MBWI of the quartz was 22.3 kWh/t. Gravity separation tests were carried out using a shak-ing …
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Shaking table separation is suitable for separation of fine particle materials and is widely used for separation of tungsten, tin, tantalum, niobium, and other rare metal and noble metal ores. It is also used for separation of iron ore, manganese ore, and coal.
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Non-metallic inclusions (NMIs) in steels have been the focus of various experimental studies due to their detrimental character. While isolated processes, such as agglomeration or dissolution, have been well investigated, holistic in-situ views with high-temperature confocal scanning laser microscopy (HT-CSLM) have been rare. In this …
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Shaking table can realize high enrichment ratio and high separation accuracy; therefore, it is a fine particle gravity separation equipment that is widely used. To overcome disadvantages such as low processing capacity of single machine and large occupied land area, the United States, the UK, the Soviet Union, and China developed …
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Section snippets Material and methods. To facilitate the application of remaining slag in rock wool production, the acidity coefficient (i.e., the ratio of acidic oxide (SiO 2, Al 2 O 3) content to basic oxide (CaO, MgO) content) was adjusted to 1.6–2.0.Steel slag (from Ma Steel Ltd.) was used as an acidity coefficient regulator, and calcium …
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FeO was added as a combination of metallic iron and hematite and CaO was added as limestone. 400 g of the ... (1200 °C) for 150 minutes. The high-temperature state of slag was obtained using a cold sampling bar, which was directly quenched in water and subsequently dried in a dry chamber at 423 K (150 °C). ... resulting in a lower PbO …
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