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e sealable grade using the one stage spiral technique. 5. Conclusions and recommendationsThis project involved the modeling of a mill and spiral concentr. tor as a proposed process to recover the high carbon ferrochrome alloy content of the slag. The work covered modeling of the mill and the spiral concentrat.
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The Cr-containing iron powder obtained by magnetic separation could replace part of ferrochrome alloy during the stainless steel refining process. ... To ensure the melting of slag system to promote the reduction reaction, the roasting temperature might need to reach 1400 °C during the reduction process. ... The magnetic separation …
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The beneficiation studies reveal that the product can be enriched to a Cr/Fe ratio of 3.35 and 3.02 by gravity concentration (wet shaking table) and wet high intensity magnetic separation ...
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The glass-ceramics of CaO-MgO-Al2O3-SiO2-Cr2O3 system was prepared by melting method using blast furnace slag, low-carbon ferrochrome alloy slag and quartz sand as raw materials, and the effect of ...
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Besides, the total contents of Cr (Cr 2 O 3 wt%) and Fe (Fe 2 O 3 wt%) increased from 10.14% and 44.58% (the raw COPR) to 11.52% and 53.44% (the COPR-HT after magnetic separation), inferring that the magnetic residue of COPR-HT was in levels suitable for a potential utilization as the ferrochrome fine powder product in the steel …
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Chromium was successfully separated from synthesized stainless steel slag (CaO–SiO2–MgO–Cr2O3) through the addition of waste silicon powder and CaF2. Waste silicon powder shows a promising and environmentally friendly reductant, compared to carbon, achieving the transformation of chromium from stainless steel slag to dispersed …
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Recovery of metal from steel slag and slag processing ( Shen and Forsberg, 2003 ). The magnetic separation method is used for separating metallic iron and iron minerals from steel slag. Commonly used magnetic machines are the cross-belt magnetic separator, drum magnetic separator and magnetic pulley separator.
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Ferrochrome is a ferroalloy in the metallurgy, playing a key role in the production of stainless steel. This alloy, consisting primarily of iron and chromium (50-705), is renowned for its corrosion resistance and durability, making it an indispensable component in various industrial applications.
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With the addition of waste silicon powder (nSi:nO = 1.5) and 6% CaF2 into synthesized stainless steel slag and reduction of the slag at 1600 °C, the content of Cr2O3 decreased from 10 to 0.10 wt ...
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· The ferroalloy separation from the lumpy slag happens in a special process, which is based on a gravity and magnetic separation. The first stage of slag processing is crushing and sc reening the feed material to fractions of 0-4 and 4-22 mm. Coarser fractio ns are handled by a heavy media separation - the DWP-method. A magnet
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Because of their excellent properties, glass-ceramics have been widely developed and applied in many fields, and there are many potential application values to be disseminated. The preparation of glass-ceramics from industrial slag and metallurgical waste provides a new way for the comprehensive utilization of solid waste. Coal gangue …
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Environmental impact assessment studies have been conducted for using ferrochrome slag in pavement construction. The migration of chromium elements from ferrochrome slag to the underlying soil was very low [3]. Gravity separation and magnetic separation methods were found to be effective for recovery of Cr from the ferrochrome …
DetailsThe molten slag phase is allowed to solidify either naturally or by water spraying. The solidified slag is then broken into smaller pieces, crushed, and sent to a metal recovery plant (Step 9, Figure 9). The remaining FeCr is typically recovered from the slag with magnetic separation or jigging and sold.
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This study explored the recovery of valuable metal elements in the lead smelting water-quenching slag using the method of "roasting–grinding–magnetic separation" at a roasting temperature of 1250 °C, coal dosage of 12.5%, roasting time of 90 min, and grinding time of 45 min.
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The slag from the production of ferrosilicon contains (%) 15–25 metal inclusions, 32 SiO 2, 18 CaO, and 16 Al 2 O 3.The gas cleaning dust consists of 85–98% amorphous SiO 2.The slags of carbon ferrochrome contain (%) 4–5 Cr 2 O 3, 40–48 MgO, 40–45 SiO 2, and 15–18 Al 2 O 3, and the dusts of gas cleaning contain 20–40% Cr 2 O …
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The loss of Cr units in FeCr production wastes, i.e. slag, BFD and venturi sludge, is a significant contributor to loss of revenue. The recovery of Cr units from FeCr wastes has up to now mainly been associated with physical separation methods, such as jigging, magnetic separation, dense media separation (DMS), flotation, shaking tables …
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High carbon ferrochrome slag (HCFS) is a byproduct from the production of ferrochrome, and there is no effective method to deal with it. In this paper, aiming at comprehensive utilization of HCFS, magnetic separation is determined to separate and extract chromium materials from HCFS.
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With the addition of ferrochrome slag, the introduced Cr 2 O 3 may play a role in the deconstruction of the glass network and is more likely to produce a spinel phase as a way to promote the heterogeneous nucleation of the diopside phase. The sample with a ferrochrome slag addition of 12 wt% shows the optimal recrystallization ability.
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The densities of ferrochrome and slag are 6800 kg/ m3 and 2800kg/ m3 respectively hence gravity separation method in water medium can be done. Concept 1 Diaphragm pulsed separation.
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The recovery of ferrochrome (FeCr) alloy from fine (<600 μm) ferrochrome slag typically involves the use of gravity concentration, amongst other physical separation techniques. This study demonstrates the value of utilising mineralogical methods both to determine alloy composition and liberation and to assist in setting up partition surface …
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Ferrochrome slag is a common industrial solid waste produced during the smelting of chromite in submerged arc furnaces [8].In the current production process, for every 1 ton of ferrochrome alloy manufactured, approximately 2.5 tons to 2.6 tons of chromite are consumed, resulting in the production of 1 ton to 1.2 tons of ferrochrome …
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Gravity separation and magnetic separation methods were found to be effective for recovery of Cr from the ferrochrome slag. However it's been applied in India for safe disposal [2,
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The lowest specific energy in this work was 5.7 kWh/kg of ferrochrome resulted from using 0.7 of slag basicity. ... The process followed by another magnetic separation, thus the Cr/Fe ratio was ...
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Ferrochrome slag (FCS) is a by-product of ferrochrome industries and is produced during the extraction of ferrochrome from chromite ore. The chemical composition of FCS comprises of 27-33% SiO 2, 15-25% Al 2 O 3, 20-35% MgO, and 10-15% iron-chromium compounds.The high chromium content of FCS and the possibility …
Detailsthe Indian soil classification system, ferrochrome slag was classified as poorly graded gravel (GP). The physical and mechanical properties of ferrochrome slag are summarized in Table 1. From the sieve analysis, it was found that there was particle deficiency below 1.18mm, so quarry dust was mixed with ferrochrome slag in proportions of 10% to 50%
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To avoid dumping this waste into landfills, researchers have tried utilizing the tailings and the ferrochrome slag as magnesia-chromite refractories ... Lekili ME (2018) Recovery of chromite from processing plant tailing by vertical ring and pulsating high-gradient magnetic separation. Journal of Underground Resources 13:23–35. Das SK …
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In this study, the beneficiation performance of chrome from the high carbon ferrochrome slag (HCFS) was evaluated. The mineralogical characteristics of HCFS was investigated first, and then HCFS was treated by magnetic separation, gravity separation, magnetic-gravity combined separation, and gravity separation after grinding respectively, to …
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The Ferrochrome Magnet is meticulously engineered for the separation of materials with notoriously low magnetic susceptibility, such as Ferrochrome, Banded Ironstone, and Shales. These materials are typically challenging due to their fine particle size and lower magnetic properties compared to other ferrous materials.
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The multi-stage wet weak magnetic separation method is suitable for steel slag, with a best magnetic separation intensity of 100 mT in the laboratory range and a single magnetic separation time of 1 min. The steel slag concentrate rate is 30.54% and the T.Fe content is 54.10%. It can replace part of the sintered ore to return to the iron …
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