The recovery of ferrochrome from slag at Zimasco

Mashanyare, H.P.; Guest, R.N.

doi:10.1016/s0892-6875(97)00111-8

Cited by 13 publications

(6 citation statements)

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“…In order to stabilize the Cr(VI) in the form of CrO 4 2− in the stabilized/solidified waste, a stabilization additive for Cr(VI)-binding must be added into the mixture. Since S/S binders are highly alkaline, precipitation is a major reaction in immobilization by PC.…”

Section: Stabilization/solidification (S/s) Of Fafdmentioning

confidence: 99%

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Leaching behavior of pollutants in ferrochrome arc furnace dust and its stabilization/solidification using ferrous sulphate and Portland cement

Bulut

Özverdi

Erdem

2009

Journal of Hazardous Materials

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Section: Stabilization/solidification (S/s) Of Fafdmentioning

confidence: 99%

“…Slag and arc furnace dusts are generated as waste material in enormous quantities during the ferrochrome production. While small percentage of the slag has been used as construction materials and aggregate [2][3][4], the majority of it is held in dumps. Slags can contain high levels of toxic elements [5,6].…”

Section: Introductionmentioning

confidence: 99%

Leaching behavior of pollutants in ferrochrome arc furnace dust and its stabilization/solidification using ferrous sulphate and Portland cement

Bulut

Özverdi

Erdem

2009

Journal of Hazardous Materials

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“…In order to recover metal, slag has been crushed and subjected to wet magnetic and gravimetric methods [1,5]. All of these might be good ideas, however, slags can contain high levels of extractable toxic elements which could pose environmental problem.…”

Section: Introductionmentioning

confidence: 99%

Hexavalent chromium removal by ferrochromium slag

Erdem

Altundoğan

Turan

et al. 2005

Journal of Hazardous Materials

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The aim of this study is to demonstrate the potential of Cr(VI) generation during jigging operation applied for ferrochrome recovery from slag. The Cr(VI) concentrations of water contacted with ferrochromium slag (W/FS=10) in a closed cycle after 50 batches were found as 0.61 mg/l. Also, reduction of Cr(VI) to Cr(III) and a subsequent precipitation of Cr(III) by using ferrochrome slag (FS) in a model solution has been aimed. The effects of amount of acid, contact time, FS dosage, initial Cr(VI) concentration and temperature on the Cr(VI) reduction have been studied through the batch runs. The amount of acid has been found to be the most effective parameter affecting the Cr(VI) reduction. A 10 g/l FS dosage and 3.5 ml/l H2SO4 (5M) are sufficient to reduce all Cr(VI) in the model solution containing 10mg/l Cr(VI) and for contact time of 60 min at 25 degrees C. In reduced solutions, precipitation of metal ions has been studied by using extra FS. A 60 g/l dosage of fresh FS can precipitate all Cr(III) and Fe ions in the reduced solution. Thus, it has been demonstrated that the treatment of jigging water stream to be generated in a ferrochrome plant containing Cr(VI) can be accomplished by using ferrochromium slag and sulphuric acid. Also, it has been determined that solid residues of the process are environmentally stable by applying TCLP test.

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“…However, those processes have not completely recycled the chromium slag. HCFS is an important source of chromium metal (Mashanyare and Guest, 1997;Spooren et al, 2016;Van Staden et al, 2014;Xue et al, 2018). At present, the high-cost leaching method is the main method to recycle the chromium in HCFS (Chen et al, 2014;Spooren et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Mineralogical characterisation and separation studies on the recovery of Cr2O3 in the high carbon ferrochrome slag

Chang¹,

Li²,

Zheng³

et al. 2020

Physicochem. Probl. Miner. Process.

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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 recover the Cr2O3. Finally, the Fuerstenau upgrading curves were used to evaluate the separation performance of different separation processes. The results indicated that the gravity separation process with a proper grinding condition gave the optimum beneficiation performance. A concentrate product with 30.18% Cr2O3 grade and 22.52% recovery was obtained from the HCFS.

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The recovery of ferrochrome from slag at Zimasco

Cited by 13 publications

References 0 publications

Leaching behavior of pollutants in ferrochrome arc furnace dust and its stabilization/solidification using ferrous sulphate and Portland cement

Leaching behavior of pollutants in ferrochrome arc furnace dust and its stabilization/solidification using ferrous sulphate and Portland cement

Hexavalent chromium removal by ferrochromium slag

Mineralogical characterisation and separation studies on the recovery of Cr2O3 in the high carbon ferrochrome slag

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