Gravity separation by falcon concentrator- an over review

Farajzadeh, Saghar; Chelgani, S. Chehreh

doi:10.1080/01496395.2022.2028836

Cited by 19 publications

(7 citation statements)

References 47 publications

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“…The average pooling is used to focus the spatial information, while the maximum pooling focuses on finer target feature information. Finally, the channel attention is generated by summation operation and sigmoid function activation [36], which is calculated as shown in equation (4).…”

Section: Backbone Improved By Attention Mechanismmentioning

confidence: 99%

“…Spiral concentrator based on gravity spiral structure is a widely used mineral separation and resource recovery equipment [1], due to the advantages of non-pollution, energy saving, easy to-mass production configuration, and low construction and operation costs, so that in the production of iron, tin, titanium, tantalum niobium and other metals and sulfur, coal and other non-metallic ore beneficiation has gained a large number of applications [2][3][4]. Although this traditional beneficiation equipment based on spiral ramp flow has high efficiency and practicality, the operation of most of the equipment relies on human eyes to judge the operation status of the equipment and requires human resources to operate the control parameters of the equipment, which finally easily leads to high labour intensity and unreliable beneficiation index.…”

Section: Introductionmentioning

confidence: 99%

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Feature detection of mineral zoning in spiral slope flow under complex conditions based on improved YOLOv5 algorithm

Keshun,

Huizhong

2023

Phys. Scr.

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In actual processing plants, the quality and efficiency of the traditional spiral slope flow concentrator still rely on workers to observe the changes in the mineral belt. However, in realistic complex working conditions, the formation of mineral separation zones is subject to large uncertainties, and coupled with the limited efforts, experience, and responsibility of workers, it becomes important to free up labour and improve the efficiency and profitability of the beneficiation plant. Therefore, to solve the problem of difficult detection of fuzzy small target mineral separation point features in real scenes, an improved YOLOv5-based algorithm is proposed. Firstly, the dataset quality is well improved by image enhancement and pre-processing techniques, after that an innovative CASM attention mechanism is added to the backbone of the YOLOv5 model, followed by a multi-scale feature output and prediction enhancement in the neck part of the model, and an optimized loss function is designed to optimize the whole feature learning process. The improved effect of the model and the specific detection performance were tested using real mine belt image datasets, the ablation experiment verified the comprehensive effectiveness of the proposed improved method and finally compared it with the existing high-level attention mechanism and target detection algorithms. The experimental results show that the improved YOLOv5 algorithm proposed in this study has the best overall detection performance carrying a MAP of 0.954, which is over 20% better than YOLOv5. It is worth mentioning that the improvement to achieve this performance only increases the parameter values by 0.8M and GFLOPs by 1.8, moreover, in terms of the inference speed, it also achieves a respectable 63 FPS, implying that the proposed improved method achieves a better balance between the performance enhancement and the computational complexity of the model, the overall detection results fully satisfy the industrial requirements.

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Section: Backbone Improved By Attention Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Feature detection of mineral zoning in spiral slope flow under complex conditions based on improved YOLOv5 algorithm

Keshun,

Huizhong

2023

Phys. Scr.

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“…The Falcon separator also features a truncated cone-shaped container but distinguishes itself from the Knelson separator by lacking rings and not requiring any fluidization water, enabling higher centrifugal accelerations. The latest model, the Ultrafine (UF) Falcon, can reach accelerations of up to 600 G and is designed to handle materials with particle sizes ranging from 3 to 75 µm [80]. During operation, the pulp fed at the bottom of the cone is distributed across the smooth walls by the centrifugal acceleration generated by the rotating bowl, progressively moving upwards.…”

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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“…Los concentradores centrífugos-gravimétricos empezaron a operar hace más de 60 años en la industria metalúrgica (Foucaud et al, 2019) y su principio se basa en las velocidades de sedimentación de las diferentes partículas en el campo centrífugo (Farajzadeh & Chelgani, 2022), dado a la introducción de un campo centrífugo para la recuperación de metales preciosos (Aramburú et al, 2016), además del alto peso específico de los metales preciosos, permitía recuperar oro de tamaño ultrafino, mejorando así la perfomance metalúrgica de los equipos de concentración gravimétrica (Gupta & Yan, 2016;Araujo et al, 2019;Rao et al, 2022). El uso de la tecnología tradicional de concentración gravimétrica logra recuperar los metales preciosos de tamaño mayor a las 75 μm (Alvarez, 2006), de tal manera que las partículas de menor tamaño de oro que no lograban concentrarse debido a la presión ejercida por la fluidez y viscosidad con respecto a la densidad del concentrado y el agua (Hinojosa, 2016;Zhang et al, 2019), eran dispuestas en las relaveras.…”

Section: Introductionunclassified

Geometalurgia aplicada a relaves auríferos cianurados en la región Arequipa y su posterior proceso por Gravimetría

Escalante

Dávila

2023

Rev. Inst. investig. Fac. minas metal cienc. geogr

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La muestra de relave evaluada en este estudio pertenece a una planta concentradora en la región de Arequipa, que tiene una capacidad de 430 TMD, la cual procesa mineral aurífero proveniente de la minería artesanal. El beneficio de estos tipos de minerales se realiza mediante el proceso de cianuración, carbón en pulpa, desorción y refinería. El objetivo de la investigación radica en evaluar la viabilidad técnica de la aplicación de un equipo concentrador centrífugo-gravimétrico de nombre Falcon C, cuya finalidad es la de concentrar el oro que no fue recuperado en las etapas previas y de esta manera aprovechar los valores metálicos que se encuentran en dichas relaveras. El estudio de microscopía óptica de luz reflejada de la muestra determinó la presencia de minerales como calcopirita, esfalerita tipo I, galena, pirita, pirrotita, arsenopirita, hematita y gangas, se realizó también un estudio de microscopía electrónica de barrido, se ha podido determinar que el oro está ocluido en la pirita. En base a los estudios mineralógicos se realizaron pruebas de concentración centrífuga-gravimétrica en equipo Falcon C, cuya mejor prueba sustentó una recuperación de 60.00% de oro y 20.92% de plata con una calidad de 3.96% en oro y 11.46% en plata.

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Gravity separation by falcon concentrator- an over review

Cited by 19 publications

References 47 publications

Feature detection of mineral zoning in spiral slope flow under complex conditions based on improved YOLOv5 algorithm

Feature detection of mineral zoning in spiral slope flow under complex conditions based on improved YOLOv5 algorithm

Gravity Concentration in Urban Mining Applications—A Review

Geometalurgia aplicada a relaves auríferos cianurados en la región Arequipa y su posterior proceso por Gravimetría

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