Apr 24 2014. Bioleaching, or microbial ore leaching, is a process used to extract metals from their ores using bacterial microorganisms. The bacteria feed on nutrients in the minerals, causing the metal to separate from its ore. The metals commonly extracted using this process include gold, silver, zinc, copper, lead, arsenic, antimony, nickel ...
WhatsApp: +86 18203695377
2 Bioleaching of EWaste for Metal Recovery. Bioleaching is the microbemediated transformation or mobilization of metals from the ores or metal wastes into the lixiviant [ 10 ]. The abiotic factors that affect bioleaching are pH, temperature, substrate concentration, oxygen requirements, etc.
WhatsApp: +86 18203695377
Bioleaching may be effectively used to extract nonferrous metals from sulfide ores and concentrates. At the same time, some minerals are refractory and their bioleaching rate is often comparatively low that does not allow the required metal extraction rate to be achieved. In the present work, we studied the twostage process, which included stages of biological and chemical leaching, to ...
WhatsApp: +86 18203695377
The bioleaching process resulted in 98% (copper) and 82% (nickel) at 30 °C (160 rpm) within 72 h. ... (zinc), 64% (aluminum), 86% (copper), and 74% (nickel) were obtained. A higher copper extraction of 85% at 50 °C in 8 d by Sulfobacillus ... Kaksonen, Bioleaching of gold from sulfidic gold ore concentrate and electronic waste by ...
WhatsApp: +86 18203695377
Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to the environment; namely, water, air and microorganisms. In other words, bioleaching is the commercialization of the ability of certain bacteria and archaea, found in nature, to catalyze the oxidation of sulfide minerals.
WhatsApp: +86 18203695377
Bioleaching refers then to the process of extracting metals from ores using natural materials present in the environment, such as water, air, and microorganisms [ 20 ].
WhatsApp: +86 18203695377
Extraction processes for secondary copper sulfides and lowgrade ores includes the process of heap bioleaching. Heap bioleaching presents a cost efficient extraction method that requires a less intensive energy input resulting in a higher profit. This extraction process can be applied to large quantities of lowgrade ores, at a lower capital ...
WhatsApp: +86 18203695377
The increase of the temperature leads to an increase of copper extraction rates from lowgrade copper ore as shown in Fig. 4. A maximum of % Cu was recovered at 60°C as compared to other three temperatures % at 40°C, % at 50°C and % at 60°C respectively. Copper dissolution was higher at 60°C than at 50 or 40°C.
WhatsApp: +86 18203695377
The interaction between microorganisms and minerals was a hot topic to reveal the transformation of key elements that affecting bioleaching efficiency. Three typical lowgrade copper ores, the main copperbearing components of which were primary sulfide, secondary sulfide and highoxidative sulfide copper, were obtained from Dexing, Zijinshan ...
WhatsApp: +86 18203695377
Heap leaching. Heap leaching is another common method used to extract copper from lowgrade ore. The process involves placing the ore on a lined pad and then sprinkling it with a solution that contains sulfuric acid. The acid leaches the copper out of the ore and into the solution, which is then collected and processed to concentrate the copper.
WhatsApp: +86 18203695377
Mu et al. reported a process for synchronous extraction of nickel and copper from a mixed oxidesulfide nickel ore in a lowtemperature roasting system. In this process, sodium sulfate was used as an additive for improving the extraction of nickel by converting into Napyrosulfate, and more than 97% of nickel could be extracted after roasting ...
WhatsApp: +86 18203695377
Spasova et al. (2006) examined the extraction of copper, gold, and silver from a heap consisting of five tons of polymetallic sulfide ore that had been crushed to less sizes than 10 mm. The main copperbearing mineral of the ore was chalcopyrite, while secondary copper sulfides, such as covellite and bornite, also were present.
WhatsApp: +86 18203695377
The application of bioleaching of metal sulfides (MS) and its understanding have evolved over the last decades. The mobilization of metal cations from often almost insoluble minerals in ores by biological acidification, oxidation, and complexation processes is referred to as bioleaching, and its application is termed biomining, being now a worldwide established geobiotechnological process.
WhatsApp: +86 18203695377
Additionally, for gold and copper extractions, bioleaching is used to extract cobalt, zinc, nickel, and uranium from lowgrade ores and industrial effluents. In this review, the fundamental process of bioleaching from lowgrade metal sulfide ores are discussed with emphasis on mechanism, types, pathways, techniques, and bioleaching development.
WhatsApp: +86 18203695377
It is divided in two parts, the fundamentals and the practical aspects of this technology, and includes (i) the principles of bioleaching chemistry, (ii) data regarding bioleaching...
WhatsApp: +86 18203695377
The authors Moravvej et al. studied the effects of microwave irradiation as a pretreatment for sulphides and oxidized copper ores via leaching tests in shaking flasks, to later carry out a conventional leaching process, obtaining a copper extraction of % for sulphide copper ores without pretreatment and % with pretreatment, while for ...
WhatsApp: +86 18203695377
Although bioleaching is used commercially to process copper, zinc, nickel and cobalt ores, ... Post bioleaching process the extraction of metals is a crucial and complex procedure. Due to no. of metals and nonmetals embedded over the waste material, a multicomponent solution is obtained. Therefore, the extraction of target metals is a ...
WhatsApp: +86 18203695377
Since the copper grade is very low and the deposit contains significant amounts of arsenic, the traditional flotation and smelting process cannot be applied to extract copper economically and effectively, and in 1998 the mine operators began extracting copper using heap bioleaching (Ruan et al. 2006). Due to the relatively warm climate (average ...
WhatsApp: +86 18203695377
Abstract. In copper dump leaching, runofmine ore is irrigated with acidic leaching solution to generate aqueous cupric ions for further processing. The very large size of the ore particles being leached, as much as two meters in diameter, should preclude any significant metal recovery. Dump leaching should not work; and yet it does.
WhatsApp: +86 18203695377
Considering the extraction of Au from refractory ores as an example, it has been seen that without pretreatment, the recovery of Au with the conventional leaching process (cyanidation) is less than 50% but with bioleaching, the recovery rates increase to more than 95% depending on the mineral composition of the ore and on the extent of pre ...
WhatsApp: +86 18203695377
يرغب أحد موردي المواد من بلجيكا في إنتاج مسحوق الحجر الجيري لملابسه...
الهند غنية بالموارد المعدنية المختلفة وهي سوق مهم لمعالجة المعادن
Copyright © 2023 GMC Co., Ltd. SiteMap
