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1

Concentration Characteristics of a Complex Antimony Ore

Gülcan Ergin, Can İlkay B., Can N. Metin, Ergün Levent Ş.

Physicochemical Problems of Mineral Processing

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2019

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Vol. 55, iss. 4

823--839

EN

Selection of a proper concentration method for a sustainable production of antimony metal from an ore deposit has its unique challenges and crucial of importance due to the growing use of antimony compounds and increasing strategic importance. Therefore, detailed laboratory scale beneficiation studies of a complex stibnite ore and modeling & simulation studies based on the experimental results were investigated within this study. Quantitative mineralogical characterization, chemical analyses, sieve tests and the heavy liquid tests were performed in the scope of ore characterization. Froth flotation, gravity concentration, electrostatic separation and ore sorting were conducted to introduce the best possible flowsheet for the individual industrial sample. It was concluded that heavy medium separation would be the only method can be used for subjected stibnite ore. Therefore, four conjectural beneficiation scenarios were tested by simulation studies for the cases proposedly allowing to produce concentrates having 10, 12, 14 and 16% Sb content. Within the simulation studies substantiating the real-life processing operation in terms of realistic performance figures, flowsheet design covered the processing of -10+0.5 mm fraction and relatively fine sizes separately via heavy medium cyclone and shaking tables, respectively. Following the itemized mass and water balances, the simulation results showed that when the grade of the concentrates were requested in between 10-16%, the total recovery of the concentrates changed between 46-49% in case of feeding 1.18% Sb with 20 tones per hour feed rate.

2

Advanced separation methods in the X-ray-optical sorting systems

Kołacz J., Wieniewski A.

Cuprum : czasopismo naukowo-techniczne górnictwa rud

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2015

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nr 2

137--146

EN

A new sensor based sorting system related to complex image analysis has been developed at Comex. The main advantage of this system is connected with its universality where many material parameters are analysed in the same processing unit by a single passage. It makes it possible to separate different mineral particles using over 20 parameters describing their colour, shape, texture and size. In addition the X-ray image (XRT) is integrated with the optical analysis, thus providing more information not only about the material surface but also about the internal structure of the separated particles. The paper describes sorting examples of different materials like: copper ore, zinc and lead ore, and chrome ore.

PL

Firma Comex, opracowała nowy system sortowania minerałów i materiałów, oparty na kompleksowej analizie obrazu. Główną zaletą tego układu jest możliwość zastosowania kilku czujników i systemów identyfikacji w tej samej jednostce, podczas tylko jednego przejścia materiału przez system. Układ pomiarowy opisywanego urządzenia oparty jest na kombinacji analizy optycznej za pomocą kamery oraz czujnika promieniowania Roentgena, w tym samym urządzeniu. Umożliwia to rozpoznanie cząstek różnych materiałów na podstawie analizy koloru oraz kształtu, w której cząstki te mogą być identyfikowane przy pomocy ponad 20 parametrów stosowanych do opisu koloru, rozmiaru, kształtu i tekstury. Dodatkowo, sygnał z czujnika promieniowania Roentgena (XRT) jest integrowany z analizą optyczną, co daje ważną informację na temat własności nie tylko powierzchni cząstek, ale ich wewnętrznej struktury. W artykule opisano kilka przykładów sortowania różnych materiałów, takich jak: rudy miedzi, rudy cynku i ołowiu oraz rudy chromu.

3

Pre-sorting of asymmetric feeds using collective particle ejection

Kleiv R. A.

Physicochemical Problems of Mineral Processing

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2012

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Vol. 48, iss. 1

29-38

EN

This paper presents a theoretical analysis of the potential capacity enhancement that can be obtained by employing collective particle ejection (CPE) in automated sensor-based sorting circuits when sorting asymmetric feeds. During CPE sorting particles are examined and categorised individually, but physically separated as a set containing several particles. A CPE sorter must be placed in serial connection with a subsequent conventional individual particle ejection sorter (i.e. an IPE sorter) in order to achieve complete separation of individual particles, thus creating a CPE:IPE circuit. The relative capacity of this circuit per unit investment cost, compared with a conventional sorting circuit, depends on the relative concentration of the particle categories in the feed and decreases as the particle distribution becomes more symmetrical. As demonstrated in this paper, CPE can yield a significant capacity enhancement per unit investment cost when sorting sufficiently asymmetric feeds in situations where the capacity of conventional IPE sorting is limited by the actual physical separation of the particles and not their presentation and examination or the data analysis. The relative processing period ratio is the key parameter governing the feasibility of the CPE:IPE circuit and must be determined as a function of set size.