scholarly journals Environmentally Friendly Pyrometallurgical Scheme for Vacuum Separation of Non-Ferrous Metals from Waste Products in Incineration Plants

2021 ◽  
Author(s):  
Sergey Trebukhov ◽  
Valeriy Volodin ◽  
Olga Ulanova ◽  
Alina Nitsenko ◽  
Farkhat Tuleutay
Keyword(s):  
Noble Metals ◽  
Ferrous Metal ◽  
Raw Material ◽  
Thermal Method ◽  
Residual Pressure ◽  
Waste Products ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Zinc Concentrate ◽  
Separate Product

Abstract Residues from the municipal solid waste processed in incineration plants in European countries are an important raw material to obtain valuable components, including non-ferrous metals. State and private companies specializing in the processing of waste incineration slag as products most often receive concentrates of non-ferrous metals, which, on average, contain, in mass. %: 20÷60 Cu; 10÷30 Zn; 5÷15 Pb; ~ 1 Al; ~ 1 Sn; ~ 1 Fe, up to 50 g/t Аu and up to 3,000 g/t Ag. Concentrates are sent for processing to smelters without taking the cost of zinc into account. The paper presents the study on the separation of metallic zinc into a separate product (zinc concentrate) from the collective concentrate of non-ferrous metals by a vacuum-thermal method, the safest from the environmental point of view. The study was performed with non-ferrous metal concentrate of +0.3-0.8 mm in size, containing wt. %: 68.07 - Cu; 12.4 - Zn; 14.78 - Pb; 0.99 - Al; 1.2 - Sn; 0.15 - Fe, up to 2.0 kg/t - Ag. The material was heat treated at 800÷900℃ with the residual pressure in the system of less than 0.13 kPa. Zinc concentrate was obtained, containing more than 96% of the main component. At the same time, the Cu content increased by 14.09% in the residue from the heat-vacuum treatment. Other metals (Pb, Al, Sn) including noble metals were also concentrated in the residue. The results of the study show that it is possible to separate zinc into a separate product from non-ferrous metal concentrates containing more than 10% Zn in the initial material by the proposed method.

scholarly journals GLOBAL NON-FERROUS METALLURGY RESOURCES MARKET

2020 ◽  
pp. 109-130
Author(s):  
Elizaveta Rastyannikova ◽  
Keyword(s):  
Ferrous Metallurgy ◽  
Raw Materials ◽  
Ferrous Metal ◽  
Consumer Electronics ◽  
Raw Material ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
The One ◽  
New Applications ◽  
The Impact

Since the beginning of the XXI century, the raw material of non-ferrous metallurgy began to acquire new outlines. First, due to the growing demand for resources from the rapidly developing countries of Asia (China, India, South Korea), the volume of world production and international flows of both raw ore and ore dressing – concentrates have increased. Secondly, the concentration of countries that produce raw materials on the one hand and consume them on the other has increased. The article is devoted to comparative statistical analysis of international flows of raw materials of non-ferrous metals. The leading countries in the world exporting non-ferrous metal ores and countries importing them have been identified. The impact of new applications of non-ferrous metals on increasing international trade, such as the expansion of the production of batteries for electromobile and consumer electronics, the development of nuclear energy, etc., is highlighted.

Рентгенофлюоресцентный анализ металлических изделий из скального погребения Узуур-Гялана (Монгольский Алтай)

2021 ◽  
Author(s):  
Мунхбаяр Б.Ч. ◽  
Keyword(s):  
Chemical Composition ◽  
Comparative Studies ◽  
Ferrous Metal ◽  
Tenth Century ◽  
Cultural Relations ◽  
Local Characteristics ◽  
Ferrous Metals ◽  
Metal Products ◽  
Non Ferrous Metals ◽  
The Comparative Study

The article describes the metalwork of the Uzuur Gyalan rock burial, popularly known online in 2016 as the «Adidas Mummy». The definitions and chemical composition of the metalware were compared with those of the time in the region. According to the results of the comparative study, the composition of the bronze mirror is very different from other bronze objects. However, bridles, saddle plaques, and ligaments are similar to the main non-ferrous metals in the region, but appear to have local characteristics. Further detailed comparative studies of the chemical composition of non-ferrous metal products in the tenth century are important steps in establishing regional cultural relations.

scholarly journals A Study on the Synergistic Change of Non-ferrous Metal Futures and Stock Prices in China—Based on the Complex System Synergy Degree

2019 ◽  
Vol 267 ◽  
pp. 04009
Author(s):  
Qingxin Kong ◽  
Shangde Gou
Keyword(s):  
Stock Prices ◽  
Composite System ◽  
Negative Impact ◽  
Ferrous Metal ◽  
Futures Market ◽  
2008 Financial Crisis ◽  
Ferrous Metals ◽  
Metal Market ◽  
Non Ferrous Metals ◽  
The 2008 Financial Crisis

Based on the synergetics perspective, this paper constructs a composite system of non-ferrous metal futures and stock prices, using MATLAB to analyze the data of 3405 trading days from 2004 to 2018 in China. The empirical results show that non-ferrous metal stock prices are generally more orderly than futures prices in the selected period; the price discovery function of aluminum futures is worse than that of copper and zinc; and the 2008 financial crisis has an indelible negative impact on the coordination of China's non-ferrous metals futures market. Finally, this paper discusses whether there are representative metals in the non-ferrous metal market, and makes a brief summary.

scholarly journals Assessing possibility of technogenic raw material processing using ultra-low concentrations of sodium cyanide

2020 ◽  
Vol 24 (5) ◽  
pp. 1105-1112
Author(s):  
Anastasia Vasilkova ◽  
◽  
Alexander Byvaltsev ◽  
Olga Khmelnitskaya ◽  
Grigory Voiloshnikov ◽  
...  
Keyword(s):  
Raw Materials ◽  
Sodium Cyanide ◽  
Gold Recovery ◽  
Raw Material ◽  
Ferrous Metals ◽  
Low Concentrations ◽  
Reagent Consumption ◽  
Copper Zinc ◽  
Non Ferrous Metals ◽  
Technogenic Raw Materials

The purpose of the study is to conduct experiments in order to determine the possibility of technogenic gold-bearing raw material cyanidation using ultra-low concentrations of NaCN. Experiments are carried out on the cyanidation of three samples of technogenic raw materials of different composition. The first sample consists of pyrite cinders (Au - 1.8-2.3 g/t, Ag - 13-22 g/t, Fe - 48.52%, Cu - 0.15-0.30%, Zn - 0.3-0.6%). The second sample is represented by the aged tailings of copper-zinc flotation (sample I) with the content of Au - 0.8 g/t, Ag - 7.0 g/t, Fe - 17.2%, Cu - 0.212%, Zn - 0.207%. The next object is the copper-zinc flotation tailings of a concentration plant (sample II), with the following content of Au - 1.22 g/t, Ag - 15.2 g/t, Cu - 0.13%, Zn - 0.23%. It is recommended to use an aqueous wash from non-ferrous metals with subsequent lime treatment as a preliminary processing of pyrite cinders. Cyanidation is carried out at different consumptions of reagent: from 0.075 to 3 kg/t. The experiments have shown that gold recovery in this range of NaCN consumption varies from 42.9 to 44.2%; moreover, a decrease in the reagent consumption allows to reduce the concentration of non-ferrous metal ions in cyanidation solutions. Before cyanidation sample I has also been subjected to aqueous wash to remove acid and non-ferrous metals. NaCN consumption varies from 0.25 to 2.2 kg/t. In this case the extraction of gold amounts to 36.6-46.4%. Cyanidation of tailings (sample II) is carried out in the range of 0.15-1.2 kg/t of NaCN. Gold recovery varies from 24.1 to 30.9%. The cyanidation technology of technogenic raw materials in the field of ultra-low concentrations of sodium cyanide is promising, since it provides acceptable gold recovery under low reagent consumption. For further research in the field of development of an extraction technology of valuable components, the flotation tailings of copper-zinc production (sample II) are chosen as a promising object. It is planned to carry out semi-industrial tests, calculate technical and economic indicators and develop process regulations.

scholarly journals Modern electrochemical processes and technologies in ionic melts

2003 ◽  
Vol 39 (1-2) ◽  
pp. 93-107 ◽  
Author(s):  
A. Omelchuk ◽  
S.V. Volkov ◽  
O.G. Zarubitskii
Keyword(s):  
Ferrous Metal ◽  
Metal Alloys ◽  
High Quality ◽  
Bipolar Electrodes ◽  
Electrochemical Processes ◽  
Ionic Melts ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Metallic Impurities

An analysis of the known methods for the electrochemical purification of non-ferrous metals in ionic melts is presented. A comparative estimation of the results of the electrochemical purification of non-ferrous metals by different methods has been performed. The main regularities of the electrochemical behavior of non-ferrous metals in conventional and electrode micro-spacing electrolysis are presented. It has been found that when electrolyzing some metals, e. g. bismuth, gallium, there is either no mass exchange between the electrodes, or it occurs under filtration conditions. It has been shown that the electrode micro-spacing processes provide a high quality of non-ferrous metals purification at low specific consumption of electric power and reagents. The use of bipolar electrodes and ?-alumina diaphragms hinders the transfer of metallic impurities from the anode to the cathode. The effects revealed were used to develop new processes for the separation of non-ferrous metal alloys in ionic melts; most of them have been put into practice in non-ferrous metallurgy.

scholarly journals Ecological/economical Assessment of Pit Waters (the Ural Copper Pyrite Watersealed Mines as a Study Case)

2016 ◽  
pp. 52
Author(s):  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Water Discharge ◽  
Water Bodies ◽  
Raw Material ◽  
Environmental Damage ◽  
Ferrous Metals ◽  
Order Of Magnitude ◽  
Copper Pyrite ◽  
Non Ferrous Metals

Worked-out copper pyrite mines are one of the considerable sources of hydrosphere pollution. Analysis of components of the environmental damage to surface water bodies due to treated pit water discharge has been carried out. Environmental damage to water bodies caused by the Levikha and Degtyarsk mines pit water discharge both during the mines operation and after watersealing of them is assessed in 100–200 million rubles per year? And the value of the prevented environmental damage is one order of magnitude higher. Individual components contribution to environmental damage has been determined: during the mines operation cooper was the main pollutant, after the pumping termination zinc became the main pollutant. It has been stated that pit water is a reliable renewable source of non-ferrous metals and rare earth elements and can be considered a hydro/mineral raw material deposit. Commercial content of non-ferrous metals and rare earth elements in the watersealed copper pyrite mines has been estimated. Total recoverable value of non-ferrous metals and rare earth elements in the Levikha mine pit water exceeds 4 million US dollars per year. Rare earth elements comprise the main share. It has been shown that potential recoverable value of the components exceeds cost of annual neutralization of acidic pit water and the value of environmental damage caused by the treated pit water discharge.

Melting of Low-Level Radioactive Non-Ferrous Metal for Release

2007 ◽  
Author(s):  
Ulrich Quade ◽  
Thomas Kluth ◽  
Rainer Kreh
Keyword(s):  
Ferrous Metal ◽  
World Market ◽  
Market Prices ◽  
Low Level ◽  
Nuclear Decommissioning ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Industrial Reuse ◽  
High Level ◽  
Treatment Procedures

Siempelkamp Nukleartechnik GmbH has gained lots of experience from melting ferrous metals for recycling in the nuclear cycle as well as for release to general reuse. Due to the fact that the world market prices for non-ferrous metals like copper, aluminium or lead raised up in the past and will remain on a high level, recycling of low-level contaminated or activated metallic residues from nuclear decommissioning becomes more important. Based on the established technology for melting of ferrous metals in a medium frequency induction furnace, different melt treatment procedures for each kind of non-ferrous metals were developed and successfully commercially converted. Beside different procedures also different melting techniques such as crucibles, gas burners, ladles etc. are used. Approximately 340 Mg of aluminium, a large part of it with a uranium contamination, have been molten successfully and have met the release criteria of the German Radiation Protection Ordinance. The experience in copper and brass melting is based on a total mass of 200 Mg. Lead melting in a special ladle by using a gas heater results in a total of 420 Mg which could be released. The main goal of melting of non-ferrous metals is release for industrial reuse after treatment. Especially for lead, a cooperation with a German lead manufacturer also for recycling of non releasable lead is being planned.

scholarly journals A Comparison of Two Novel Non-Ferrous Metal Recovery Equations: Development, Similarity and Industrial Significance

2021 ◽  
Author(s):  
E. J. Grimsey
Keyword(s):  
Distribution Coefficient ◽  
Ferrous Metal ◽  
Detailed Comparison ◽  
Distribution Coefficients ◽  
Metal Recovery ◽  
Iron Transfer ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Constant Distribution

AbstractThe recovery of non-ferrous metals in oxidative sulfide smelting and converting processes and within reductive oxide smelting processes has been previously analyzed using two similar equations which express recovery in terms of iron transfer and a distribution coefficient. A detailed comparison will show that the equations are mathematically identical but with one equation validated only for constant distribution coefficients. The wider applicability of the equation and implications for optimization of metal recovery are discussed.

scholarly journals ECOLOGICAL ASPECTS OF THE TECHNOGENIC DEPOSITS PRESERVATION OF NON-FERROUS METALS IN THE NORTH CAUCASUS

2021 ◽  
Vol 13 (2) ◽  
pp. 265-272
Author(s):  
Ivan ALBOROV ◽  
◽  
Fatima TEDEEVA ◽  
Olga BURDZIEVA ◽  
◽  
...  
Keyword(s):  
Negative Impact ◽  
Raw Materials ◽  
Ferrous Metal ◽  
Industrial Building ◽  
North Caucasus ◽  
Mountain Rivers ◽  
The North ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Waste Deposits

The article presents the results of research on a comprehensive assessment of techno genic waste deposits located in the North Caucasus region, gives a brief description of the material composition of techno genic raw materials, element-by-element quantitative reserves that are part of the accumulated secondary georesources for their possible utilization, production of non-ferrous metals and raw materials for the manufacture of industrial building materials. The article considers the sanitary and ecological parameters of the functioning of man-made raw materials in complex orographic, meteorological and geographical conditions. The critical aspects of the preservation of techno genic waste deposits in the current anthropogenic conditions are identified. The risk factors for the removal of toxic and harmful geomaterials into the water area with significant harm to the flora and ichthyofaunal are identified. For a deeper assessment of the minerals contained in the extracted ore, a unified state register of techno genic waste deposits should be created, Taking into account the high fragmentation of all the above – mentioned process links at the present time , the owners, taking into account the current sanitary and regulatory requirements, must take adequate measures to ensure the regulatory and environmental requirements in accordance with the current Federal Law “On Production and Consumption Waste”. The need for complex processing of waste from mining and processing industries in the North Caucasus is also dictated by environmental aspects due to the high risk of the occupied territories (they are located in floodplain terraced areas of mountain rivers) due to the flooding of mountain rivers, including the high vulnerability of resort and recreational and balneological complexes due to the negative impact of these negative sources. The assessment of the useful components contained in the extracted ore is currently not carried out in full, and the accumulated waste from processing non-ferrous metal ores is used in small volumes.

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