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The chemical costs for leaching 1 kg of ferrochrome slag were deduced to be US$0.4944. The chemical costs of leaching ferrochrome slag are less than those of recovering magnesium from ores as ferrochrome slag is assumed to be free.
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The chemical costs of leaching ferrochrome slag and using it as a source of magnesium for struvite precipitation are lower than using magnesium chloride indicating the process may be more economically feasible if capital costs are also investigated. ... Mashanyare H., Guest R. The recovery of ferrochrome from slag at Zimasco. Miner. Eng. 1997 ...
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A substantial amount of ferrochrome slag is produced in Zimbabwe which is estimated to be between 1.1 and 1.6 tonnes of slag per tonne of ferrochrome produced . Unfortunately, the associated generation of this solid waste in local mines is increasingly creating a burden on the environment as it occupies valuable landmass and is also creating a ...
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2.1 Operating Cost Slag has, with the exception of a few instances, been seen as an unavoidable but necessary cost of producing fer-roalloys. The removal, treatment, and disposal of slag are …
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The plant recovery is widely used for an assessment of plant performance in mineral and metal processing plants. It has been formulized as a uniform function in the form of a ratio of output to input.
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Semantic Scholar extracted view of "The recovery of ferrochrome from slag at Zimasco" by H. P. Mashanyare et al. ... Recovery of metal from slag/mixed metal generated in ferroalloy plants—a case study. R. Sripriya C. Murty. Materials Science, Engineering. 2005; 28. …
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production from 420 to 500 tonnes of ferrochrome production per month by introducing a mechanical separator at metal recovery plant that produces 80 tonnes. The difference in specific gravities of ferrochrome and slag is the key principle applied in achieving separation of the two products. The densities of ferrochrome and slag are 6800 kg/
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Lower operating cost. Slag treatment and handling constitutes an unavoidable but necessary cost in the production of ferro-alloys. ... thereby reducing the total tonnage of material processed by the metal recovery plant. Heat recovery. The molten slag discharged from a metallurgical furnace constitutes a ... On-site air granulation trials of ...
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South Africa holds more than 70% of the world's viable chromite ore reserves and produces ~46.2% of the world's high carbon ferrochrome. It was recently reported that beneficiated South African ...
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Atoll's clients enjoy the benefit of the high recoveries of cost effective MRP plants which produce saleable coarse metal (<2% slag) at >95% recovery, saleable fines (<2% slag) at >95% recovery and ultrafines (<10% slag) at >70% recovery.
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Ferrochrome slag is a by-product of the production of ferro-chrome alloy, an essential component in stainless steel. The conventional process of ferrochrome making involves the carbothermic reduction of chromite ore where around 1.2–1.5 tons of slag containing approximately 8–12% of chromium oxide is generated per ton of hot metal (Jena and …
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Small investment and low cost. The ferrochrome smelting slag processing program integrates crushing, screening, jigging and dewatering processes.
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High carbon ferrochrome (HCFeCr) alloy is the main source of chromium in steel making processes. During the production of high carbon ferrochrome alloy, in ferrochrome smelters, a substantial amount of slag is produced. These slags are generally disposed of in slag dumps or containment facilities causing environmental and containment problems.
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Recovery of ferrochrome values from flue dust generated in ferroalloy production - A case study March 2011 Mineral Processing and Extractive Metallurgy IMM Transactions section C 120(1):61-63
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As a result, the cost of ferrochrome production is enhanced. During the production, chromium is lost through formation of slag. Hence, ferrochrome slag is thought to be a useful raw material for production of high temperature insulation bricks, construction work using geopolymer made from chromium slag, etc. Therefore, R&D scientists are trying ...
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• Plants with the most cost-effective way to remove steel from slag with high processing rate and the low electricity consumption possible for each solution, • High metal recovery rate and very high cleanness, • Short payback period of …
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The current paper will examine the design and benefits of the Ecomaister-Hatch Slag Atomization Technology when applied to, for example, ferrochrome production slags. A business case is also examined utilizing a 200,000 tonne per year ferrochrome operation including a metal recovery plant as an example.
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metal recovery plant that produces 80 tonnes. The difference in specific gravities of ferrochrome and slag is the key principle applied in achieving separation of the two products.
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The recycling of high-carbon ferrochrome slag was explored through the smelting route to recover Fe–Si–Al–Cr alloys and reengineer the residual slag for alumina-enriched refractory material. ... Al in the alloy (20.56% recovery) and Al2O3 (85.78% recovery) in the slag was achieved at a charge mix consisting of 1000 g of FeCr slag, 300 g ...
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The ferrochrome smelting slag treatment plan is a summary of the practical experience of Ferrochrome smelting slag at home and abroad in the past 30 years. In order to maximize the profit of the recovery and treatment of ferrochrome slag, we have carried out many practices and finally successfully de…See more on foruimining
The grade could be improved by scrubbing or attritioning of the metal to remove surface coatings of slag. Thus, the ferrochrome could be recovered at a cost considerably …
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Jigging separation works on the difference in density between slag and alloy.The density of ferrochrome is 6.4 g/cm3, the main components of ferrochrome slag are aluminium oxide,alcium oxide and silicon oxide, the density of these slag is 2.84 g/cm3, there are big difference in density, so jigging process is an ideal method to recover ...
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A metal-from-slag plant allows producers to cope with fluctuating ferroalloy markets. During times of low prices, a producer can shut down furnaces and rely on the low-cost metal-from-slag product to remain viable. When …
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ECOFERTEC is designing customized steel slag processing and metal recovery plants for each project-specific purposes. The newest technology ECOFERTEC slag processing plant enables the most cost-effective way to remove steel from …
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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 of its leaching into the …
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3 in the high carbon ferrochrome slag Jing Chang 1, ... 2016; Van Staden et al., 2014; Xue et al., 2018). At present, the high-cost leaching method is the main . 461 Physicochem. Probl. Miner. Process., 56(3), 2020, 460-470 ... The HCFS sample was obtained from a ferrochrome plant of Mintal Group Co., Ltd in Inner Mongolia of China. The d
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Viable recovery of HCFeCr alloy from slag could mean that producers can shut down furnaces during the times of high cost of production and low demand and rely on the low …
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Comprehensive Characterization of Ferrochrome Slag and Ferrochrome Ash as Sustainable Materials in Construction
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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 slag.
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The reasoning for this is mainly due to increased operation costs (if improved waste management were to be implemented/higher cost reductants were used) and a lack of research initiatives. ... The solidified slag is then broken into smaller pieces, crushed, and sent to a metal recovery plant (Step 9 ... An experimental study on use of ...
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Ferrochrome slag that has been water-cooled is present in granulated form with grain sizes that are similar to natural sand. Ferrochrome slag is a derivative of the manufacturing of ferrochrome, an alloy of Cr (chromium) and Fe (iron) with chromium by 51–69 percent of the mass and varying proportions of Fe (iron), C (carbon), and others [18 ...
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The amount of slag generated is assumed to be 1.05 times the ferrochrome production based on plant data. 5. Temperature of ferrochrome slag is taken to be 1923 K (1650 °C) ... Percentage of heat recovery from ferrochrome slag is observed to be approximately 11 pct due to the thermodynamic limits in heat transfer between cooling slag and air ...
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Abstract: This study assessed chromium pollution in soils, plants, water and slag from a ferrochrome smelting plant in Gweru, Zimbabwe. Speciation of chromium in plant leaves, soil and slag samples was carried out by selective leaching of Cr (VI) using a sodium carbonate leaching procedure prior to the spectrophotometric determination of Cr (VI).
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Plant Capacity 430 000 ton of Ferrochrome per Annum - Normal Grade Product and Alternative Grade Product - Recovery Product (Typical < 3% slag) 6 Furnaces with 220MVA Installed Capacity Agglomeration Capacity 900 000 ton p.a. - Blocks 400 000 ton p.a. and Pellets 500 000 ton p.a. Recovery Plant: 30 000 ton Ferrochrome p.a.
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The authors of [20] provide data on the extraction of chromium from a high-carbon ferrochrome slag by magnetic separation, on measuring the viscosity of a CaO-SiO 2 -CrO slag [21], and on using a ...
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pilot scale 76mm jig, 19mm and 51mm laboratory units. In a plant site test, a 12-in (300mm) plant column was tested at a plant site for recovery of ferrochrome from slag. The jig column was extended by sections and could vary up to 3m tall. The feed slurry was prepared in a
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ferrochrome slag: A case study of a South African Ferrochrome industry FF Mugivhi Orcid 0000-0003-3289-4056 ... plant waste, ash or any other product derived from or incidental to a mining operation and which ... recovery has been approved or, after such approval, once it is, or has been re-used, recycled or
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