scholarly journals Investigation of Mechanochemical Leaching of Non-Ferrous Metals

2019 ◽  
Vol 13 (2) ◽  
pp. 113-123
Author(s):  
Vladimir Golik ◽  
Vladimir Morkun ◽  
Natalia Morkun ◽  
Vitaliy Tron
Keyword(s):  
Sulfuric Acid ◽  
Sodium Chloride ◽  
Metal Recovery ◽  
Metal Extraction ◽  
Recovery Ratio ◽  
Ferrous Metals ◽  
Non Ferrous Metals

Abstract The research deals with metal extraction from off-grade ores and concentration tailings. There are provided results of simulating parameters of reagent leaching of metals in the disintegrator according to the metal recovery ratio. The research substantiates the method of waste-free processing of chemically recovered ores. Recovery of metals into solution is the same both under multiple leaching of tailings or ore in the disintegrator and agitation leaching of tailings or ore previously activated in the disintegrator with leaching solutions. The time of agitation leaching is more by two orders of magnitude than that of the disintegrator processing. Recovery of metals into solution is most affected by the content of sodium chloride in the solution. Then, in decreasing order, go the content of sulfuric acid in the solution, the disintegrator rotor rpm and L:S ratio.

scholarly journals The effects of the extraction of non-ferrous metals on the ichthiofauna of the Lapus river bassin

2007 ◽  
pp. 6-8
Author(s):  
Ardelean Gavril ◽  
Sándor Wilhelm
Keyword(s):  
Great Degree ◽  
Nonferrous Metal ◽  
Pollution Sources ◽  
Metal Extraction ◽  
Organic Substances ◽  
Qualitative And Quantitative ◽  
Alcoholic Drink ◽  
Ferrous Metals ◽  
Non Ferrous Metals

Over the period 2003-2005 we made ichthyologic research in the basin of the Lapus river. During the sampling we noticed that in some area the water was polluted. In those areas fishweretotallyorpartiallymissing.The main pollution sources are those related to nonferrous metal extraction and processing, but there is also pollution from organic substances resulted from the communal residual waters, as well as the “tuica”(alcoholic drink) distilleries.Confronting the spots of the pollution sources with the results of the ichthyologic research.we noticed a significantcorrespondencebetween the qualitative and quantitative component of the ichthyofauna and the presence of these sources.We could, therefore prove the effect of the process of self-purificationofthewater,aswellastheexistenceofsomespeciesoffishshowing a great degree of tolerance towards pollution.

Selective Acid Leaching of Copper and Zinc from Old Flotation Tailings

2020 ◽  
Vol 989 ◽  
pp. 554-558
Author(s):  
Aleksandr Bulaev ◽  
Vitaliy Melamud
Keyword(s):  
Sulfuric Acid ◽  
Acid Leaching ◽  
Distilled Water ◽  
Acid Solutions ◽  
Iron Ions ◽  
Flotation Tailings ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Sulfuric Acid Solutions ◽  
Cu And Zn

The goal of the present work was to develop hydrometallurgical method based on acid leaching, which makes it possible to perform selective extraction of non-ferrous metals from old flotation tailings. Leaching was performed with sulfuric acid solutions (from 0.5 to 10%) and distilled water. Leaching was carried out using percolators and bottle agitator. Percolators were loaded with 100 g of old tailings, and leaching was performed with 100 mL of acid solutions. Pulp density during agitation leaching (S: L) was 1: 5. Two samples of old flotation samples were studied. The first sample of flotation tailings contained 0.26% of copper, 0.22% of zinc, and 17.4% of iron; while the second sample contained 0.36% of copper, 0.23% of zinc, and 23.2% of iron. Percolation leaching made it possible to extract up to 43 and 47% of Cu and Zn from the first sample. Extraction rate was maximum during the leaching with 1 and 2.5% sulfuric acid solutions. During the agitation leaching, the maximum extraction rate was reached with a 2.5% sulfuric acid solution (52 and 54% Cu and Zn), but the leaching rate with all solutions and distilled water differed insignificantly. Percolation leaching made it possible to extract up to 54 and 37% of Cu and Zn from the second sample of tailings, while agitation leaching made it possible to extract up to 34 and 68% Cu and Zn, respectively. The rate of non-ferrous metals extraction from the second sample with water did not differ significantly from that of obtained in the experiments with sulfuric acid solutions. In all experiments, the increase in the H2SO4 concentration led to the increase in concentrations of iron ions in productive solutions, which impedes the extraction of non-ferrous metals from solutions. Thus, it was possible to reach selective leaching of non-ferrous metals and to obtain solutions with relatively low concentrations of iron ions.

Review Lecture: Metal recycling from scrap and waste materials

1976 ◽  
Vol 351 (1665) ◽  
pp. 151-178 ◽  
Keyword(s):  
Precious Metals ◽  
Advisory Council ◽  
Metal Extraction ◽  
Waste Materials ◽  
Hydrometallurgical Processing ◽  
A Value ◽  
Ferrous Metals ◽  
Metal Recycling ◽  
Copper Refining ◽  
Non Ferrous Metals

Out of a total U. K. consumption of 2.5 million tonnes per annum (Mt/a) of non-ferrous metals with a value of about £1300 M, as much as 33% with a value of £300-400 M, is recovered from scrap. The structure of the industry which makes this important contribution to the economy is briefly outlined and the paper describes the technology by which the various non-ferrous metals are recovered in re-usable form from waste materials. Sections dealing with the following metals provide data on tonnages treated, descriptions of scrap arisings and the processes oper­ated for metal extraction and refining - copper, aluminium, lead, zinc, tin and precious metals. Reference is made to difficulties encountered and the efficiency of reclamation, such as the small amount of zinc recycled as metal. Under future developments, the possible wider use of oxygen in copper refining and hydrometallurgical processing of high value and complex scrap are discussed. Mention is made of the potential for metal recovery for domestic refuse and the rôle of the Waste Management Advisory Council is described.

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.

Leaching of Non-Ferrous Metals from Galvanic Sludges

2019 ◽  
Vol 946 ◽  
pp. 591-595 ◽  
Author(s):  
O.Yu. Makovskaya ◽  
K.S. Kostromin
Keyword(s):  
Sulfuric Acid ◽  
Environmental Hazard ◽  
Hydrometallurgical Process ◽  
Disposal Area ◽  
Ferrous Metals ◽  
Galvanic Production ◽  
Non Ferrous Metals

The problem of processing slimes of galvanic production, formed as a result of neutralization of technological solutions and wastewater containing heavy non-ferrous metals is considered. At present, sludges are transported to disposal area and are not used in any way. Typically, such sludges contain significant amounts of chromium and nickel, which creates environmental hazard. Investigated sludge of Dimitrovgrad Automobile Units Plant (Russia) contains up to 6.6% Ni and up to 7,4% Cr. The hydrometallurgical process is proposed to treatment of these sludges. Solutions of sulfuric acid, ammoniaс chloride and Trilon B were used as lixiviants. It is shown that when using a solution of sulfuric acid with pH=1,5, extraction of up to 93,3% Cu, 70,2 Ni, 90,3 Zn is achieved.

scholarly journals Hydrometallurgical Technology for Processing of Galvanic Sludges

2020 ◽  
Author(s):  
O.Yu. Makovskaya ◽  
K.S. Kostromin
Keyword(s):  
Sulfuric Acid ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
Nickel Ion ◽  
Disposal Area ◽  
Nickel Recovery ◽  
Sorption Concentration ◽  
Ferrous Metals ◽  
Galvanic Sludge ◽  
Non Ferrous Metals

The problem of processing galvanic sludges, formed as a result of neutralization of technological solutions and wastewater containing heavy non-ferrous metals is considered in this study. At present, sludges are transported to disposal area and are not used in any way. Typically, such sludges contain significant amounts of chromium and nickel, which creates environmental hazard. Investigated sludge contains up to 6,6% Ni and up to 7,4% Cr. The hydrometallurgical process to treatment of these sludges is carried out. Solutions of sulfuric acid and ammonia were used as lixiviants. It is shown that when using a solution of sulfuric acid with pH=1,5, extraction of up to 93,3% Cu, 70,2 Ni, 90,3 Zn is achieved. For selective nickel recovery sorption concentration by Lewatit TP207 is proposed. Keywords: Galvanic sludge, hydrometallurgy leaching, nickel, ion-exchange resin

Survey of Metal Recovery in the U.S. WTE Industry

2007 ◽  
Author(s):  
Werner Sunk
Keyword(s):  
Ferrous Metal ◽  
Metal Recovery ◽  
Waste To Energy ◽  
Good Time ◽  
Similar Data ◽  
Front End ◽  
Ferrous Metals ◽  
Metal Recycling ◽  
Non Ferrous Metals ◽  
The U.S

Part of the WTERT effort to increase the amount of metals recovered by the U.S. Waste-to-Energy industry was a survey to determine the type of equipment used for metal recovery and the quantities of ferrous and non-ferrous metals recovered, and the distribution in percent between front- and back-end recovered metals. A questionnaire was sent to the headquarters of the three major WTE companies and fifty three WTE plants responded with data for the year 2004. As mass burn and RDF plants were examined separately, a comparison of metal recovery by means of these two technologies was possible. The ways to recover metals in the U.S. WTE industry range from only manual separation of large objects at the tipping floor at mass burn facilities, to front-end recovery at RDF plants, to metal separation from the ash at the back-end of the WTE process or at a regional metal recovery facility. Accordingly, the amounts of metals recovered range from very little to over 40.000 tons per year. Comparison of the collected with estimated averages of ferrous (5%) and non-ferrous (0.7%) metals in U.S. MSW, indicated that 48% of ferrous and 9% of non-ferrous metal input are recovered at these 53 WTE facilities every year. The remainder is landfilled and represents a revenue loss that may be as high as $160 millions per year, including the payment of tipping fees for landfilling metals. Mass burn facilities recover an average of 43% of the ferrous and 5% of the non-ferrous metals, while RDF plants recover 71% of ferrous and 30% of non-ferrous of the assumed metal input. However, the metal input in some WTEs may differ from the U.S. average because of effective metal recycling practice in the community. Analysis of the front- and back-end recovery at mass burn and RDF plants shows that the former recover only 1% of the ferrous metal at the front-end and 99% from the bottom ash. In comparison, RDF plants recover 88% of the ferrous metal at the front-end and only 12% after combustion. Mass burn plants recover 94% of the non-ferrous metal at the back end. It is interesting to note that RDF plants also recover most of their non-ferrous metals (98% of the total) at the back-end. Our analysis shows that there is room for increasing metal recovery of both ferrous and non-ferrous metals at selected mass burn facilities that presently recover less than 10% of the input ferrous metals. Non-ferrous metal recovery is very low for mass-burn and low for RDF plants. Since the value of WTE metals has increased appreciably recently, due to increased consumption in China, it is a good time to consider plant modifications that will help increase metal recovery. Some of the most likely WTEs for implementing such modifications have been identified and discussions are under way for effecting plant retrofits at some facilities. A current objective is to obtain similar data from the nearly 30 facilities that were not included in the first part of this survey. We are also trying to determine how metal recycling practice in the communities that supply various WTE facilities correlates with the metal recoveries attained by these facilities.

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