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Firstly, Cr elements were selectively solidified into Cr-spinel in Cr-bearing steel slag with wt.%(MgO) = 6.00, and the high-purity Cr-spinel crystals ((Mg 0.43 Fe 0.28 Mn 0.29)(Cr 1.67 Al 0.33)O 4) were effectively recovered from the molten slag via super-gravity separation with a significant Cr 2 O 3 content of 58.08 wt% and a high Cr ...
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The effects of super-gravity field on metal–slag separation at different gravity coefficients were investigated in this study. In a super-gravity field, the liquid …
WhatsApp: +86 18221755073
The effects of super-gravity field on metal–slag separation at different gravity coefficients were investigated in this study. In a super-gravity field, the liquid metal …
WhatsApp: +86 18221755073
Molten oxidation is a smelting process based on oxidation reaction in a bath at temperature above 1450 °C under oxygen atmospheric environment [46]. The …
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The titanium slag mineralography and the distribution in the as received slag and the treated slag, as well as the methods of perovskite separation were studied. After treatment, the grain size is increased from 5 μm to 200 μm, the content of TiO 2 in perovskite increases from 48% to 81%, the morphology changes from snow shaped …
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A centrifugal apparatus with a heating function was designed in this paper, as depicted in Fig. 1, for accomplishing the recovery and separation of Cr-spinel crystals from Cr-bearing steel slag at high-temperature, which can reach the maximum operating temperature of 1673 K.The heating furnace and the counterweight were placed …
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This paper uses gravity separation to prepare different samples, and four typical HEs (Se/Cd/Pb/Cr) in separated products were investigated. The results showed that samples with an ash yield of 28.72%–98.86% and a specific surface area of 12.90 m 2 /g-389.51 m 2 /g were obtained through gravity separation.
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Semantic Scholar extracted view of "Effects of high gravity on dissolution of solid modifiers in molten slag" by Xinyu Zhao et al. ... Recovery of zinc from galvanizing dross by a method of super-gravity separation. Zhe Wang Jintao Gao Anjun Shi Long Meng Zhancheng Guo. Materials Science, Engineering. 2018; 41.
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The need for gravity separation of coarse-grained gold (0.1–0.2 mm and larger) ... otherwise, the gold will stay in the viscous slag. The gold content in the concentrate must be above 30 kg/t (or 3%) to avoid significant gold losses in the slag. Another issue of direct smelting of concentrates is the presence of sulfides.
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Slags coming from stainless steel (SS) and ferrochromium (FeCr) production generally contain between 1 and 10% Cr, mostly present in entrapped metallic particles (Fe–Cr alloys) and in spinel structures. To …
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In recent years, the super-gravity method was reported to use for the phase separation at high temperatures, including removal of solid inclusions in liquid metals (Li et al., 2017; Guo et al., 2019; Wen et al., 2019) and separation of precipitated phases from slag melts (Lan et al., 2019; Li et al., 2019; Gao et al., 2016), which verified that ...
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According to the movement and settling behavior of matte droplets during the reduction-sulfurizing smelting of copper slag under normal gravity within 60 min at various conditions, the recovery of matte droplets was performed via super-gravity separation at a gravity coefficient of G = 600 and a low temperature of 1200 ℃ within 3 min Fig. 9 ...
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The effects of super-gravity field on metal–slag separation at different gravity coefficients were investigated in this study. In a super-gravity field, the liquid metal concentrated along the direction of super-gravity, while the molten slag migrated and aggregated along the opposite direction thereafter separated from the metal. Moreover, a straight interface …
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A new approach to enriching britholite phase from the rare-earth-rich slag by super gravity was investigated. The Bayan Obo iron ore, which was used as raw material, was reduced and melting separated to produce iron nugget and rare-earth-rich slag. Subsequently, the slag was heat-treated and enriched in the super gravity filed. …
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After super-gravity separation at G = 1000 and 1473 K (1200 °C) for 3 minutes, the mass fraction of Cu in the separated copper phase reached 86.11 wt pct, while that in the separated iron-rich ...
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structure. Consequently, after super gravity separation with gravity coefficient of G = 660 to G = 840 at 1 578 K for 10 minutes, the mass fraction of TiO 2 in the perovskite phase was up to 46.36 wt%, whereas ... slag separation at low temperature,22,23) it is possible to separate perovskite from the titanium bearing slag melt by super gravity ...
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[18] [19] [20] Therefore, this paper introduced the super gravity field into the separation process of slag and iron, aiming to realize the complete separation of slag and iron at a lower ...
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After gravity separation of the HC FeCr slag, a fraction with a Cr content close to high grade Cr ores (≥50% Cr2O3) can be obtained. This fraction represents 12 wt.% of the HC FeCr slag, and can ...
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This book introduces super gravity metallurgy in separation of valuable component in metallurgical slag. It collects the principle, apparatus and research for super gravity high-temperature metallurgy and the novel technology for selective crystallization and separation of various valuable components in different metallurgical slags by super …
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Resource Recovery and Recycling from Metallurgical Wastes. S. Ramachandra Rao, in Waste Management Series, 2006 8.1.7.4 Chromium from Chrome Slag. Gravity separation has been applied to process chrome slag by steel researchers in India. Heavy media separation (Choudhury et al., 1996) and crushing and jigging (Khan et al., 2001) …
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The gravity separation technique involves the separation of valuable minerals from the associated gangue constituents by utilizing the differences in their specific gravity. However, there is a dearth of literature on the application of gravity …
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DOI: 10.1016/j.seppur.2022.122616 Corpus ID: 253485316; Solidification and recovery of Cr from hazardous Cr-bearing steel slag: Selective solidification, super-gravity separation and crystal characterization
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The effects of super-gravity field on metal–slag separation at different gravity coefficients were investigated in this study. In a super-gravity field, the liquid metal concentrated along the direction of super-gravity, while the molten slag migrated and aggregated along the opposite direction thereafter separated from the metal.
WhatsApp: +86 18221755073
A green method to clean copper slag and rapidly recover copper resources via reduction-sulfurizing smelting and super-gravity separation at low temperature. Zengwu Wang Jintao Gao Xi Lan ... A new approach to enriching britholite phase from the rare-earth-rich slag by super gravity was investigated. The Bayan Obo iron ore, which …
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The separation of metal and slag under super gravity with different gravity coefficients has been investigated and discussed in the authors' previous work [20]. The results verified that the motion and separation behavior of metal and slag in the melt have been significant enhanced under G = 1000.
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A novel approach for quickly separating a metal copper phase and iron-rich phase from copper slag at low temperature is proposed based on a super-gravity method.
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Individual gravity separation is often used as an important method for the enrichment of residual carbon in coal gasification slag. Gravity separation equipment mainly includes a spiral separator (Wei et al., 2022), pulsating liquid-solid fluidized bed (Zhang et al., 2010), pneumatic separator (Ai et al., 2020), inflatable-inclined liquid-solid ...
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Abstract Beneficiation of low-grade ore is of critical importance in order to meet the growing demand for coal and mineral industries. But, low-grade ores require fine grinding to obtain the desired liberation of valuable minerals. As a result, production of fine particles makes the beneficiation process difficult through conventional gravity …
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The anosovite was effectively separated from the modified titanium (Ti)-bearing slag melt in a reducing atmosphere by supergravity. The slag melt went through the filter along the supergravity direction, whereas the high-purity rod-shaped anosovite crystals of size 200 to 4000 μm were intercepted by the filter and separated from the …
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