- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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The Fe3O4 and Fe2SiO4 in copper slag were successfully reduced to metallic iron by coal-based direct reduction. Under the best reduction conditions of 1300 °C reduction temperature, 30 min reduction time, 35 wt.% coal dosage, and 20 wt.% CaO dosage (0.75 binary basicity), the Fe grade of obtained iron concentration achieved …
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The neutralization residue undergoes a treatment process for disposal as general solid waste. Residual metal ions, such as copper and iron, and the toxic substance arsenic in the leachate necessitate a pre-iron removal, copper collection, and waste liquid discharge process for product recovery and harmlessness.
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Other copper droplets adhere to magnetite particles which are suspended in the slag in a short-range-ordered array. The study also confirms that in the presence of increasing amounts of anthracite as a reducing agent, the magnetite content of the slag is progressively decreased and the recovery of copper from the slag is significantly …
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Currently, the majority of copper tailings are not effectively developed. Worldwide, large amounts of copper tailings generated from copper production are continuously dumped, posing a potential environmental threat. Herein, the recovery of iron from copper tailings via low-temperature direct reduction and magnetic separation was …
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Further optimisation of the grinding and flotation conditions for this slag should yield an improved copper recovery. Minor differences in copper/iron selectivity for the flotation tests on the four slags were observed with the low copper slag giving the most selective result and the high copper slag the least selective result.
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The aim of the testwork was to optimise the free gold recovery by; (1) enhancing the copper and gold recovery into a copper concentrate and (2) floating the gold away from the copper sulphides and pyrite. The ore was crushed to -2 mm and ground in a stainless steel laboratory rod mill to a p80 of 106 ~tm for the flotation tests.
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Copper tailing is a widespread and intractable solid waste in copper production. Traditional leaching and recovery technology for copper tailing focuses on copper but neglects the leaching of iron. With the increase in applications and demands of iron-containing materials for environment, understanding the leaching
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Eventually, comprehensive recovery of iron, silicon and copper in copper slag was achieved. Some conclusions were obtained as follow. 1. A single recovery ratio of 91% for iron and 76% for silicon is obtained after activated reduction combining with water-leaching and magnetic separation, during which copper and arsenic enrich in metallic iron.
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The recovery of iron from copper slag can not only alleviate the serious shortage of iron ore resources faced by the domestic steel industry, but also alleviate the environmental pressure caused by copper slag storage. Iron in copper slag mainly exists in the form of iron glass, fayalite and magnetite.
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Copper slag, a waste solid produced in the copper smelting process, is a high-quality secondary resource with huge output. The recycling and utilization of copper slag is of great interest because it avoids the loss of valuable metals and the threat of harmful metals, and saves a lot of natural resources and energy. This paper firstly …
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Reprocessing magnetite-rich copper (Cu) tailings prompted a concern about arsenic (As) risks in seepage water and revegetated plants at Ernest Henry Cu Mine (EHM) in North Queensland, Australia, due to the closely coupled relationship between iron (Fe) minerals and As mobility. The magnetite removal …
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Regrind of the copper tails improved gold recovery due to improved liberation. 2.1.3. Surface coatings. ... The mixed occurrence of Au particles (both liberated native gold and Au in association with copper and iron sulphide minerals) implies that two-stage rougher flotation (copper flotation followed by pyrite flotation) can provide the ...
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Dry magnetic separation (DMS) enables to separate the non-magnetic fraction of iron ores at the initial stage of their concentration and therefore to decrease cost of their further processing. However, a considerable amount of metal is lost in DMS tails at that.
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An enrichment ratio of 2 was realised, with the recovery of Cu being 62%, whereas Fe in the froth concentrate increased from 69.8 mass% to 71.8 mass%. The main aim was to upgrade the grade and recovery of copper and iron to enhance the recovery for copper and iron in the next experimental stage of leaching.
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Therefore reducing gold in table tails by increasing recovery from the Knelson concentrate would certainly increase gravity gold. Furthermore the presence of free gold in final tails clearly ... Gold Recovery From Gold Copper Concentrates Using The InLine Leach Reactor And Aurix® Resin. ...
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Recovery of copper-dominated resources from copper mine drainage by chemical oxidation and sulfur biocycling: A pilot-scale study ... It is characterized by a low pH, with a high concentration of sulfates and metal ions, dominated by copper, iron, and manganese ... and (2) to add a carbon source and nutrients. In addition, tail gas …
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