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Articles 1 - 6 of 6
Full-Text Articles in Mining Engineering
A New Process To Upgrade Ilmenite To Synthetic Rutile, Fathi Habashi
A New Process To Upgrade Ilmenite To Synthetic Rutile, Fathi Habashi
Fathi Habashi
Ilmenite occurs in black sand at the mouth of great rivers as in India, or as massive deposits like in Quebec Province in Canada. It is unsuitable for processing into pigment or for metal production because of its high iron content and its low grade. Pyrometallurgical and hydrometallurgical methods have been developed to cope with this problem which resulted in the production of two commercial products that became known as synthetic rutile and Sorelslag. Attempts are also underway to produce TiO2 pigment directly from ilmenite. This report presents a newly developed process called the Magpie process, which enables the production …
Pressure Hydrometallurgy, Fathi Habashi
Pressure Hydrometallurgy, Fathi Habashi
Fathi Habashi
Pressure Hydrometallurgy is a supplement to the author’s Textbook of Hydrometallugy [second edition 1999]. It is an update to the new processes described in the literature dealing with recovering metals from ores and concentrates using this technology. Great progress was made in this field that necessitated this review.
Catalytic Or Thermal Reversed Flow Combustion Of Coal Mine Ventilation Air Methane: What Is Better Choice And When?, Krzysztof J. Gosiewski
Catalytic Or Thermal Reversed Flow Combustion Of Coal Mine Ventilation Air Methane: What Is Better Choice And When?, Krzysztof J. Gosiewski
Krzysztof Gosiewski
The paper presents a comparison of the two options of reverse flow reactors destined for the utilization of coal mine ventilation air methane by catalytic (CFRR) or thermal (TFRR) combustion. It has been shown that both solutions have advantages and drawbacks. The use of the catalyst significantly decreases reactor temperature and makes the operation becomes to be autothermal for methane concentrations lower than in TFRR (even as low as over 0.06 vol.%). On the other hand when methane is combusted, particularly if average concentration is higher than ca. 0.4 vol.% the maximum temperature in the reactor appears to be too …
Evidence Of The Existence Of Cathodic And Anodic Zones During The Leaching Of Minerals And Metals, Fathi Habashi
Evidence Of The Existence Of Cathodic And Anodic Zones During The Leaching Of Minerals And Metals, Fathi Habashi
Fathi Habashi
It is accepted worldwide that the dissolution of minerals in some cases, is an electrochemical process where anodic and cathodic reactions take place. There are many parameters, such as agent concentration, that directly affect the dissolution process. The rate of leaching of minerals may differ depending on the oxygen concentration. In this paper, the existence of anodic and cathodic zones on themineral surface during the dissolution/leaching of minerals andmetals has been presentedwith some differentworks. It isworthmentioning that a good number of published papers have experimentally demonstrated the existence of anodic and cathodic areas on the mineral surface.
Hydrometallurgy Over The Years (Geçmişten Günümüze Hidrometalurji), Fathi Habashi
Hydrometallurgy Over The Years (Geçmişten Günümüze Hidrometalurji), Fathi Habashi
Fathi Habashi
Binlerce yıl önce insanlar, nasıl fırın yapacaklarını, ayaçları eritmek için ateşi nasıl kullanacaklarını ve metalleri nasıl üreteceklerini öğrenmelerine rağmen, cevherlerin zenginleştirilmesinde çözeltilerin kullanımı, asit ve bazların öğrenilip kullanıldığı simyacılar dönemine rastlamaktadır. Bununla birlikte modern hidrometalurjinin başlangıcı, iki önemli prosesin keşfedildiği 19. yüzyılın sonlarına dayandırılabilir. Bu prosesler, altın ve gümüşün çözündürülmesi için siyanür liç prosesi ve boksit cevherlerinin değerlendirilmesi için geliştirilen Bayer prosesidir. Daha sonra, 1940’larda, uranyum zenginleştirilmesi ile ilgili olarak Manhattan Projesi (ABD) bir dönüm noktası olmuştur. O tarihten itibaren, hidrometalurji giderek ilerlemekte ve hatta bazı pirometalurjik proseslerin yerinialmaktadır. Bu süreçte Kanada’nın, özellikle uranyum, nikel, kobalt ve çinko kazanımı ile …
Geçmişten Günümüze Hidrometalurji Hydrometallurgy Over The Years*, Fathi Habashi
Geçmişten Günümüze Hidrometalurji Hydrometallurgy Over The Years*, Fathi Habashi
Fathi Habashi
Thousands of years ago people had learned how to build furnaces and use fire to melt rocks and produce metals but the use of aqueous solutions for ore processing came much later, mainly at the time of the alchemists when acids and alkalies became known and used. Modern hydrometallurgy, however, can be traced back to the end of the 19th century when two major operations were discovered: the cyanidation process for gold and silver extraction and the Bayer process for bauxite treatment. Later, in the 1940s, a breakthrough came during the Manhattan Project in USA in connection with uranium extraction. …