Studies were carried out on oxidized bismuth-containing products from a deposit in the Soviet Union in order to obtain technological data necessary for industrial evaluation of the deposit ...

For the correct choice of industrial extraction equipment it is necessary to know the rate of extraction processes.Previous studies have established the prospect of using extraction for the extraction of cobalt and nickel from layered solutions obtained during the processing of various metallurgical products ...

Replenishment of raw material reserves of non-ferrous metallurgy mainly by ores of complex composition, which are characterized by a fine mutual germination of minerals, and simultaneously increasing requirements for the full use of all valuable components of these ores urgently require the creation of new, more advanced technological schemes of their processing.

Electrolytic separation of tin from alkaline solutions is widely used in industry when using secondary raw materials. However, the cathode reactions occurring in this process have not been sufficiently studied, which excludes clear recommendations for the parameters of electrolysis (electrolyte composition, current density, and the relationship between these parameters). The present work aims to fill this gap.

Heterogeneous equilibria involving metal carboxylates have been studied in sufficient detail. Based on the results of these studies, an extraction series of elements has been compiled, which makes it possible to predict the direction of possible ion exchange reactions. At the same time, the kinetics of heterogeneous processes of this kind has not been studied, which prevents the elucidation of the mechanism of the reactions and the correct choice of equipment for the process.

The presence of large amounts of iron in the ores of non-ferrous metals, and consequently in the solutions obtained during their processing, complicates the technological process of extraction of these metals with naphthenic acids. Thus, the presence of divalent iron naphthenate in the extract makes it difficult to re-extract nickel and cobalt from the organic phase. In this regard, it is of interest to study the composition and properties of this salt.

Одним из способов извлечения олова из отходов жести яв­ляется растворение олова в щелочных растворах, содержащих метанитробензойную кислоту, с последующим электролизом.Технологический раствор представляет собой сложную многокомпонентную систему. Помимо свободной щелочи и ме- танитробензойной кислоты он может содержать станнаты и станниты олова, а также различные продукты восстановления нитробензойной кислоты (азокси-, азо-, гидразо- и другие со­единения). Неизбежно образование карбонатов за счет погло­щения углекислого газа из воздуха ...

Возможность успешного применения нафтеновых кислот для экстракционного извлечения цветных и редких металлов установлена многочисленными исследованиями. Широкому промышленному применению этого экстрагента из цветной металлургии препятствует неизбежное наличие ионов трехвалентного железа в исходных растворах. Для удаления этих ионов предлагается использование других экстрагентов (например, жирные кислоты) или гидролитическое осаждение, что несомненно осложняет технологический про­цесс ...

Ионы магния наряду с другими неизбежными примесями, как правило, содержатся в растворах, получаемых при гидро- металлургическом переделе рудного сырья и в водной частз флотационной пульпы. Представляет интерес выяснение соста­ва и свойств соединений, образуемых ионами магния с нафте­новой кислотой, возможность использования которой для экс­тракции цветных металлов из растворов и флотации некоторых несульфидных минералов установлена многими исследования­ми ...

The possibility of using naphthenic acids for the extraction of some non-ferrous metals has long been established, but more detailed studies of this extractant have been published only in recent years. Thus, A. Fletcher and his co-workers established the dependence of metal extraction by naphthenic acid solution in kerosene on pH value and showed the possibility of separation of some metals by this method. The result of the research were several patents for the practical separation of metals. This process was applied for separation of copper and zinc from solutions obtained by leaching of pyrite cinders. The possibility of using naphthenic acids for the extraction of rare and rare earth metals has been investigated.

The method of separation of zinc and nickel with the help of ionites is based on the different strength of complex ions of these metals in aqueous solution. Thus, at a chlorine ion concentration of 1.5-2.0 g-ion/l, zinc forms complex anions, while nickel remains in the form of cations. The different charge sign of nickel and zinc ions in chloride solution can be used for separation of these metals by absorption of nickel cations by cationites or complex zinc anions by anionites.In this work both variants were investigated. Weakly acidic KB-4-P2 in Na-form and strongly acidic KU-2 in H-form served as cationites, strongly basic AB-17 in chloride form served as anionites.

Increase in production of non-ferrous metals requires finding methods of complex processing of poor polymetallic ores. One of the significant obstacles for wide industrial application of hydrometallurgical methods of processing of such ores is the absence of simple enough and economically favorable methods of selective extraction of metals from the resulting solutions.

The evaluation of the interaction of minerals with various reagents is of great importance for a number of technological processes (flotation, hydrometallurgy of ores, etc.). The possibility to establish the presence or absence of interaction facilitates the choice of the process regime, reducing the number of necessary experiments. Determination of the nature of this interaction makes it possible to consciously control the technological process.In addition, finding out the nature of the interaction of minerals with various reagents can be useful in the study of the properties of the minerals themselves.

In a significant part of gold-bearing deposits of the Soviet Union the main ore minerals are iron sulfides - pyrrhotite and pyrite. Therefore, it is of undoubted interest to study the behavior of these minerals in alkaline cyanide solutions used to extract gold from ore. There is a widespread opinion among gold industry workers that the main reason for high potassium cyanide consumption in the treatment of some ores or extreme duration of this treatment is the presence of pyrrhotite. However, there are no detailed studies on the behavior of pyrrhotite during cyanidation. The present work presents the results of studying the kinetics of interaction of pyrrhotite of one of gold-bearing deposits with potassium cyanide solution, the composition of which is close to those usually used in industry. The work done allowed us to suggest the mechanism of interaction of pyrrhotite with potassium cyanide solution under different conditions, and on this basis to propose ways to reduce the consumption of cyanide.