Biogeotechnology Application in the Recovery of Metals from the Wastes of Processing Plants

2015 ◽  
Vol 1130 ◽  
pp. 618-622 ◽  
Author(s):  
A.N. Seleznev ◽  
S.V. Balikov ◽  
L.Ye. Shketova ◽  
N.V. Kopylova
Keyword(s):  
Magnetic Separation ◽  
Precious Metals ◽  
Base Metals ◽  
Nickel Zinc ◽  
Copper Nickel ◽  
Metals Recovery ◽  
Metals Removal ◽  
Murmansk Region ◽  
Processing Plants ◽  
Pyrite Tailings

In order to recovery base and precious metals from processing plants tailings of Southern Ural and the Murmansk region, test work on heap biooxidation using these products was carried out. These tests involved the chemical and mineralogical analyses of the samples, the bacteria adaptation for the products tested, heap biooxidation in percolation columns, base metals (copper, nickel, zinc) precipitation and gold cyanidation. The recoveries of base metals to the solution from the products of magnetic separation of the wastes were 75% Ni and 50% Cu. This work is aimed at studying sustainability of magnetic separation products and pyrite tailings biotechnological processing. Also, gold and base metals recovery to the solution and the options of base metals removal from the solutions were studied.

Heap Biooxidation of Gold-Sulphide and Polymetallic Ores and Tailings

2017 ◽  
Vol 262 ◽  
pp. 122-125
Author(s):  
Alexander V. Epiforov ◽  
Aleksey N. Seleznev ◽  
Yuriy Ye. Emelyanov ◽  
Stanislav V. Balikov ◽  
Lyudmila Ye. Shketova ◽  
...  
Keyword(s):  
Precious Metals ◽  
Base Metals ◽  
Copper Ore ◽  
Zinc Recovery ◽  
Nickel Recovery ◽  
Ore Processing ◽  
Refractory Gold ◽  
Processing Plants ◽  
Refractory Ores ◽  
Gold Bearing

Heap biooxidation is the most economic option of treating processing plants tailings and refractory ores containing non-ferrous and precious metals and sulphides.Pyrite tailings of copper ore processing (Sample 1), tailings of sulphide copper-nickel ore processing (Sample 2) and double refractory gold-bearing ore (Sample 3) were studied.Autotrophic microorganisms Acidithiobacillusthiooxidans and Acidithiobacillusferrooxidans were used for the tests. The duration of heap biooxidation tests for Samples 1, 2 and 3 was 6, 10 and 16 months, respectively. The rates of copper and zinc recovery into solution during heap biooxidation of Sample 1 were 68% and 71%, respectively; the rates of copper and nickel recovery from Sample 2 were 50% and 75%, respectively. Base metals were extracted from solution to selective high-grade concentrates after biooxidation.Biooxidation tailings of Samples 1 and 3 were leached using an alkaline sodium cyanide solution. The recovery of gold from Sample 1 and Sample 2 was 65% and 85%, respectively.

scholarly journals Dissolution of Metal Supported Spent Auto Catalysts in Acids

2016 ◽  
Vol 61 (1) ◽  
pp. 233-236 ◽  
Author(s):  
A. Fornalczyk ◽  
M. Kraszewski ◽  
J. Willner ◽  
J. Kaduková ◽  
A. Mrážiková ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Supported Catalysts ◽  
Precious Metals ◽  
Metal Substrate ◽  
Platinum Group Metals ◽  
Base Metals ◽  
Metals Recovery ◽  
The World ◽  
Catalytic Functions ◽  
Platinum Recovery

Metal supported auto catalysts, have been used in sports and racing cars initially, but nowadays their application systematically increases. In Metal Substrate (supported) Converters (MSC), catalytic functions are performed by the Platinum Group Metals (PGM): Pt, Pd, Rh, similarly to the catalysts on ceramic carriers. The contents of these metals make that spent catalytic converters are valuable source of precious metals. All over the world there are many methods for the metals recovery from the ceramic carriers, however, the issue of platinum recovery from metal supported catalysts has not been studied sufficiently yet. The paper presents preliminary results of dissolution of spent automotive catalyst on a metal carrier by means of acids: H2SO4, HCl, HNO3, H3PO4. The main assumption of the research was the dissolution of base metals (Fe, Cr, Al) from metallic carrier of catalyst, avoiding dissolution of PGMs. Dissolution was the most effective when concentrated hydrochloric acid, and 2M sulfuric acid (VI) was used. It was observed that the dust, remaining after leaching, contained platinum in the level of 0.8% and 0.7%, respectively.

COPPER ALLOY No. 770

Alloy Digest ◽  
1968 ◽  
Vol 17 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Resistance ◽  
Copper Alloy ◽  
Heat Treating ◽  
Zinc Alloy ◽  
Resistance Wire ◽  
Nickel Zinc ◽  
Copper Nickel

Abstract COPPER Alloy No. 770 is a spring quality copper-nickel zinc alloy having high resistance to corrosion. It is recommended primarily for optical goods, springs, resistance wire, hardware and similar products. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-185. Producer or source: Copper and copper alloy mills.

The Mining of the Romans in Spain

1928 ◽  
Vol 18 (2) ◽  
pp. 129-143 ◽  
Author(s):  
T. A. Rickard
Keyword(s):  
Precious Metals ◽  
The State ◽  
Base Metals ◽  
Republican Period ◽  
Mineral Wealth ◽  
Roman People ◽  
State Monopoly ◽  
Mining Districts ◽  
Copper Lead

During the Republican Period a number of mining districts were exploited in the territory that the Romans annexed. Mines in conquered countries that had belonged to the former rulers became the property of the Roman people, and others were acquired by confiscation or forced purchase from private owners. But the industry was not entirely a State monopoly: on the contrary, a number of mines remained in private hands, more particularly those yielding the base metals—copper, lead and tin—whereas those that yielded the precious metals—gold and silver—were retained by the State. Under the Empire the mines became a special object of bureaucratic concern: as mineral wealth had been the spoil of conquest, so in due course it became the prize of usurpation.

Marine Fungi as Potential Eco-Sustainable Resource for Precious Metals Recovery from Electronic Waste

2021 ◽  
Author(s):  
Christian Galasso ◽  
Xabier Lekube ◽  
Ibon Cancio ◽  
Antonio Dell’Anno ◽  
Christophe Brunet ◽  
...  
Keyword(s):  
Marine Fungi ◽  
Electronic Waste ◽  
Precious Metals ◽  
Metals Recovery ◽  
Precious Metals Recovery
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