A plant comparison of the vorsyl separator and dense medium cyclone in the treatment of Indian coals

Banerjee, P. K.; Rao, T. C.; Govindarajan, Bharath; Bapat, J. P.; Chatterjee, S.; Barnwal, J. P.; Rao, P. V. T.

doi:10.1016/s0301-7516(02)00118-7

Cited by 12 publications

(4 citation statements)

References 9 publications

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“…At present, the heavy medium cyclone (HMC) is the only processing technique used in India for washing coal of 13 Â 0.5 mm size. However, continuous degradation of the feed quality in terms of high amounts of near-gravity material and ash has resulted in problems of controlling the performance of HMC circuits [1]. In search of an alternative technique to improve the process efficiency of treating 13 Â 0.5 mm sized coals, the Vorsyl separator (VS) has been found to give approximately 4% higher combustible recovery, compared to a HMC at the same ash rejection level in an Indian coal preparation plant [1].…”

Section: Introductionmentioning

confidence: 99%

“…However, continuous degradation of the feed quality in terms of high amounts of near-gravity material and ash has resulted in problems of controlling the performance of HMC circuits [1]. In search of an alternative technique to improve the process efficiency of treating 13 Â 0.5 mm sized coals, the Vorsyl separator (VS) has been found to give approximately 4% higher combustible recovery, compared to a HMC at the same ash rejection level in an Indian coal preparation plant [1]. Laboratory studies while treating many other Indian coals also established the superiority of the VS over the HMC [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study on Magnetite Medium Stability in a Vorsyl Separator and in a Heavy Medium Cyclone

2006

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It is reported in the literature that a Vorsyl separator (VS) performs better than a heavy medium cyclone (HMC) when treating coals with high near-gravity material. The discussions are generally based on the results of laboratory or plant-scale data treating various coals. However, no effort has been made so far to identify the reasons behind the superior performance of a VS compared to a HMC. Medium stability is an important parameter, which affects the performance of any heavy medium separator. Therefore, an attempt has been made to study the magnetite medium stability behavior inside a HMC and VS at identical operating conditions. It is found that at any fixed-operating condition, the differential between the underflow and overflow slurry density is always less in a VS than in a HMC. Possible theoretical explanations supported by experimental data have been provided to substantiate this finding.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative Study on Magnetite Medium Stability in a Vorsyl Separator and in a Heavy Medium Cyclone

2006

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“…Dynamic separators can be classified according to the geometry of the separation chamber into cylindrical and cylindrical-conical types. The former is available in a variety of models, such as Dyna Whirlpool [19], Vorsyl [34], and Larcodems [35] separators. The latter type includes traditional dense-medium cyclones, which are widely used in mineral processing.…”

Section: Equipmentmentioning

confidence: 99%

Gravity Concentration in Urban Mining Applications—A Review

Ambrós

2023

Recycling

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Urban mining has emerged as a concept that goes beyond conventional recycling, as it aims to tackle both the challenges of solid waste generation and management, as well as the scarcity of primary resources. Gravity concentration has gained increasing attention as a promising method for addressing crucial challenges in urban mining applications. In this sense, this review provides a comprehensive and up-to-date overview of gravity concentration in urban mining processes, covering principles, techniques, current applications, recent advancements, challenges, and opportunities. Emphasis was placed on shifting from the commonly found literature focus on ore processing to solid waste processing. Three types of solid waste, namely plastics, construction and demolition waste (CDW), and waste from electrical and electronic equipment (WEEE), were chosen for a more in-depth examination due to their massive production and widespread generation. Discussions also considered the potential of gravity concentration to address the unique challenges in their processing and explored possibilities for future developments.

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“…Although a DMC is the most preferred unit operation to wash Indian coals, the Vorsyl separator (VS) has been found to give approximately 4% higher combustible recovery at the same ash rejection level in an Indian coal preparation plant [1]. Laboratory studies while treating many other Indian coals also established the superiority of the VS over the DMC [2,3].…”

Section: Introductionmentioning

confidence: 99%

Applicability of a Dense-Medium Cyclone and Vorsyl Separator for Upgrading Non-Coking Coal Fines for Use as a Blast Furnace Injection Fuel

Majumder

Shah

Choubey

et al. 2009

International Journal of Coal Preparation and Utilization

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Replacement of metallurgical coke by high injection rates of thermal coal into the blast furnace is an important technology as it reduces the cost of hot metals significantly. However, one of the main problems that prevents the use of thermal coals is their high mineralmatter contents. Although, the ash content of coals to be injected in a blast furnace should be as low as possible, a maximum of 16% ash is acceptable. A non-coking coal sample from Chhattisgarh area, India, having a feed ash content of around 27% was collected for beneficiation studies to a grade acceptable for the injection purposes.A series of experiments were conducted in a 76-mm diameter densemedium cyclone (DMC) and a Vorsyl separator (VS). It is observed that a clean coal having around 16% ash can be produced using both the cyclones if the variables are properly optimized. Further, it is observed that at the same ash level the yield of clean coal was 5%-6% more in VS than in DMC. It has also been demonstrated that at the same ash level, the magnetite medium stability in a VS was better than a DMC.

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A plant comparison of the vorsyl separator and dense medium cyclone in the treatment of Indian coals

Cited by 12 publications

References 9 publications

Comparative Study on Magnetite Medium Stability in a Vorsyl Separator and in a Heavy Medium Cyclone

Comparative Study on Magnetite Medium Stability in a Vorsyl Separator and in a Heavy Medium Cyclone

Gravity Concentration in Urban Mining Applications—A Review

Applicability of a Dense-Medium Cyclone and Vorsyl Separator for Upgrading Non-Coking Coal Fines for Use as a Blast Furnace Injection Fuel

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