The Gravity Separation of Speiss and Limestone Granules Using Vibrating Zirconia Ball Bed

Yoo, Jae Kyoung; Lee, Minji; Kim, Gyeong-Hwan; Yoo, Kyoungkeun

doi:10.7844/kirr.2020.29.3.36

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…The behaviors of particles in vibrating particulate bed have been investigated for predicting size separation of particulates in vibrating vessels [13][14][15][16]. The vibrating particulate bed method was applied recently to recycling processes as follows [17][18][19]. A recycling process using the vibrating ball (1.8-2.6 g•cm -3 ) with different ratio of soda glass beads (2.44 g•cm -3 ) and alumina beads (3.57 g•cm -3 ) was investigated to separate Al and Mg scraps [17,18].…”

Section: Parts Average Weight Scrap Prices As Of 2013mentioning

confidence: 99%

The Separation of Aluminum and Stainless-Steel Scraps Using Vibrating Mixed-Size Ball Bed

Yoo

Jha

et al. 2020

Metals

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Dry gravity separation using a vibrating zirconia ball bed is proposed in this study to separate aluminum (Al) and stainless steel (STS) scraps obtained from spent hard disk drive recycling. The effects of zirconia ball sizes and vibrating power (vibration amplitude) on the separation efficiency of Al and STS scraps were investigated. The zirconia balls moved down at the center of the vessel and rose with the wall during the vibration test. Although more STS scraps sunk than Al scraps did, the separation efficiency was not maintained because Al scraps also sunk along with balls’ movement. The separation efficiency increased to 86.6% using 1-mm zirconia balls with a 2.5-mm vibration amplitude at 4 min, but it decreased rapidly by ball moving. Therefore, when a ball bed of mixed sizes (2:1 ratio of 1 and 3 mm) was used and arranged, whereby the 3-mm zirconia balls were above the 1-mm ball bed, the separation efficiency increased to 100% for more than 2 min. This dramatic improvement was because the 3-mm ball bed acted as a barrier to prevent sunken STS scraps from rising, and Al scrap cannot sink through the 3-mm ball bed. These results indicate that the separation of Al and STS scraps could be achieved successfully using the dry gravity separation method.

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Section: Parts Average Weight Scrap Prices As Of 2013mentioning

confidence: 99%

The Separation of Aluminum and Stainless-Steel Scraps Using Vibrating Mixed-Size Ball Bed

Yoo

Jha

et al. 2020

Metals

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Hydrochloric Acid Leaching Behaviors of Copper and Antimony in Speiss Obtained from Top Submerged Lance Furnace

Chae

Yoo

Tabelin

et al. 2020

Metals

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Copper (Cu) has been recovered from speiss generated from top submerged lance furnace process, but it was reported that the leaching efficiency of Cu in sulfuric acid solution decreased with increasing antimony (Sb) content in the speiss. Scanning electron microscopy (SEM)–energy-dispersive X-ray spectroscopy (EDS) results indicate that Sb exists as CuSb alloy, which would retard the leaching of Cu. Therefore, hydrochloric acid leaching with aeration was performed to investigate the leaching behaviors of copper and antimony. The leaching efficiency of Cu increased with increasing agitation speed, temperature, HCl concentration, and the introduction ratio of O2, but also with decreasing pulp density. The leaching efficiency of Cu increased to more than 99% within 60 min in 1 mol/L HCl solution at 600 rpm and 90 °C with 10 g/L pulp density and 1000 cc/min O2. The leaching efficiency of Sb increased and then decreased in all 1 mol/L HCl leaching tests, and precipitate was observed in the leach solution, which was determined to be SbOCl or Sb2O3 by XRD analyses. However, in 2 mol/L–5 mol/L HCl solutions, the leaching efficiency of Sb increased to more than 95% (about 900 mg/L) and remained, so more than 2 mol/L HCl could stabilize Sb ion in the HCl solution.

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The Gravity Separation of Speiss and Limestone Granules Using Vibrating Zirconia Ball Bed

Abstract: 이 연구에서는 1 mm의 지르코니아볼(5.6 g/cm 3 )층을 진동시켜 스파이스(6.74 g/cm 3 )와 석회석 (2.7 g/cm 3

Cited by 2 publications

References 8 publications

The Separation of Aluminum and Stainless-Steel Scraps Using Vibrating Mixed-Size Ball Bed

The Separation of Aluminum and Stainless-Steel Scraps Using Vibrating Mixed-Size Ball Bed

Hydrochloric Acid Leaching Behaviors of Copper and Antimony in Speiss Obtained from Top Submerged Lance Furnace

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