Contact Us

Home   /   Contact

Keep In Touch With Us.

Location

Zhengzhou, China

Enhanced leaching of copper from chalcopyrite in

2007-6-1  The first series of leaching experiments involved establishing the effect of ethylene glycol on chalcopyrite dissolution. As shown in Fig. 1, about 15% dissolution was effected in the absence of glycol, while dissolution was enhanced significantly in its presence.Higher ethylene glycol concentrations were used to check the possibility of complete dissolution of chalcopyrite.

Enhanced leaching of copper from chalcopyrite in

The dissolution of copper from chalcopyrite was investigated in the presence of hydrogen peroxide and ethylene glycol. Hydrogen peroxide was used as oxidant in the leaching process.

Enhanced extraction of copper from cupriferous

2020-3-1  In this research, aiming to improve copper recovery, enhanced acid leaching of copper from cupriferous biotite by organic intercalation was conducted. Factors that affect copper leaching efficiency such as temperature, acid concentration, intercalant type and dosage were studied systematically.

Enhancement of leaching copper by electro-oxidation

Recently, enhanced leaching of copper by electrooxidation from waste printed circuit boards has also been reported (Ping, 2009). The leaching efficiency of copper was enhanced by using a chlorine

(PDF) Research progress in enhanced bioleaching of

PDF Compared with the traditional pyrometallurgical process, copper bioleaching has distinctive advantages of high efficiency and lower cost, enabling Find, read and cite all the research

(PDF) Enhancement of copper recovery by acid

The order of factors effecting the copper leaching rate of the ores in acid leaching experiments was temperature > sample size > H2SO4 concentration > leaching time > stirring speed.

Experimental research in leaching of copper-bearing

2008-3-1  We are proposing a technical model of ultrasonic enhanced pipe leaching of tailings, which is suitable for some washing plants in China. 5 Ultrasonic enhanced pipe leaching of tailings Usually, water is added to tailings from the washing plant to be pulped in a pulping station and then ZHANG Jie et al Experimental research in leaching of copper

Microwave-enhanced selective leaching of arsenic

2020-3-15  In this work, a feasible microwave-enhanced leaching process was developed for arsenic selective removal from copper smelter dusts, and arsenic leaching efficiency could reach ∼98 % after leaching for 10 min with 0.5 mol·L −1 alkaline solution, in contrast to 86 % removal for the conventional electrical-heating leaching with even a more

Selective electrochemical extraction of copper from

1. Introduction. Although heavy metal copper is an essential trace nutrient for human beings and other organisms, its elevated environmental concentration caused by anthropogenic activities has posed threat on the whole ecosystems (Solomon, 2009).In aquatic environment, high concentration of copper can cause protein inactivation and destruction of anti-oxidative defense system, disturbing

Enhanced bioleaching of copper from circuit boards of

The effect of initial pH, amount and size of printed circuit boards, and volume of inoculum on copper dissolution rates were evaluated. Results show that the highest dissolution rate of 32.44% was achieved after 7 days of leaching at initial pH 2.0, 10 g/L of waste printed circuit board, 40% v/v of inoculum for 1 mm size of circuit board.

Enhanced ferric sulphate leaching of copper from

Enhanced ferric sulphate leaching of copper from CuFeS2

Enhanced Recovery of Copper Heap Solutions

2021-1-29  Enhanced metal recovery with subsurface leaching is a means to recover lost copper from compacted ore, prior to mine closure. HGI has been helping design, monitor, and verify the effectiveness of subsurface leaching in heap leach facilities for nearly a decade.

Plant uptake and leaching of copper during EDTA

Key words: copper, EDTA, phytoremediation, plant uptake, leaching Abstract EDTA-enhanced phytoremediation of copper contaminated soil was evaluated. Up to 740 /ig g_1 of Na2H2 EDTA in solution was added to repacked soil columns, and intact cores of a sandy loam of volcanic origin, that was growing Agrostis tenuis.

Plant uptake and leaching of copper during EDTA

2019-9-14  Key words:copper, EDTA, phytoremediation,plant uptake, leaching Abstract EDTA-enhanced phytoremediationof copper contaminated soil was evaluated. Up to 740µgg−1 of Na2H2 EDTA in solution was added to repacked soil columns, and intact cores of a sandy loam of volcanic origin, that was growing Agrostis tenuis.

Enhanced Column Bioleaching of Copper Sulfides by

To assess the effects of forced aeration on leaching dynamics of sulfides, five sets of column bioleaching of copper sulfides using Acidithiobacillus ferrooxidans were conducted when the aeration rates ranged from 0 to 150 L/h. The experimental results show that forced aeration can ameliorate the porosity and flow rates throughout the heap, and improve the bacterial concentration and oxidative

Innovations in Copper: Mining & Extraction:

2021-1-21  BacTech Enviromet Corp., in conjunction with Mintek, 14 has developed proprietary technologies for the high temperature leaching of copper concentrates. Working in conjunction with Industrias Penoles SA de CV, one of Mexico's largest and most diverse mining companies, they operated a 2.2-metric tons per day (mt/d) stirred-tank copper-concentrate bioleach demonstration plant in

Enhanced Heap Leaching: II. Applications

2017-6-14  Enhanced Heap Leaching: II. Applications Shlomo Orr and Velimir Vesselinov Abstract In our 1st article (Orr, 2000), we investigated different flow and transport phenomena that could significantly reduce leaching recovery. The combination of such understanding with advanced flow and

US4343773A Enhanced leaching of minerals which

A novel process for enhancing the leaching rate of a mineral wherein the mineral is characterized by the tendency to form a reaction product layer during leaching. A suitable particulate modifier such as carbon is mixed with the mineral prior to leaching and selectively alters the characteristics of the reaction product layer. The process is particularly useful for leaching chalcopyrite

Leaching of Copper Sulphides SAIMM

2016-6-8  copper sulphide leaching options as alternatives to the more conventional pyrometallurgical processing route of copper sulphides. Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. The effect of

Plant uptake and leaching of copper during EDTA

2019-9-14  Key words:copper, EDTA, phytoremediation,plant uptake, leaching Abstract EDTA-enhanced phytoremediationof copper contaminated soil was evaluated. Up to 740µgg−1 of Na2H2 EDTA in solution was added to repacked soil columns, and intact cores of a sandy loam of volcanic origin, that was growing Agrostis tenuis.

Plant uptake and leaching of copper during EDTA

Key words: copper, EDTA, phytoremediation, plant uptake, leaching Abstract EDTA-enhanced phytoremediation of copper contaminated soil was evaluated. Up to 740 /ig g_1 of Na2H2 EDTA in solution was added to repacked soil columns, and intact cores of a sandy loam of volcanic origin, that was growing Agrostis tenuis.

Contribution of Natural Organic Matter to Copper

2019-5-25  The leaching of heavy metals, such as copper, from municipal solid waste incinerator (MSWI) bottom ash is a concern in many countries and may inhibit the beneficial reuse of this secondary material. The enhanced leaching of copper from three MSWI bottom ash samples by dissolved organic carbon (DOC) was investigated with specific attention for the nature of the organic ligands.

Heap Leach: Mining's breakthrough technology

Copper Heap Leaching (Solvent Extraction-Electrowinning SX-EW) In 2014, more than 50 major HL-SX-EW operations worldwide recovered approx. 3 million tonnes of copper, which represents roughly

Leaching of copper from cuprous oxide in aerated

The introduction of air enhanced the leaching efficiency of copper due to the role of oxygen in the air as oxidant by accepting the electron generated from the oxidation of Cu + to Cu 2+ . In the leaching test using Cu 2 O reagent, the leaching efficiencies of copper increased with increasing air flow rate, temperature and agitation speed, but

Leaching of Copper Sulphides SAIMM

2016-6-8  copper sulphide leaching options as alternatives to the more conventional pyrometallurgical processing route of copper sulphides. Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper chloride leaching. The effect of

Enhanced Heap Leaching: II. Applications

2017-6-14  Enhanced Heap Leaching: II. Applications Shlomo Orr and Velimir Vesselinov Abstract In our 1st article (Orr, 2000), we investigated different flow and transport phenomena that could significantly reduce leaching recovery. The combination of such understanding with advanced flow and

A comprehensive study of the leaching behavior and

2021-1-6  The leaching behavior of an Iranian copper oxide ore in sulphuric acid was investigated in detail to evaluate the in uence of various factors, to optimize the dissolution conditions, and to determine the kinetics of the leaching. The results indicated that the increase in the leaching time and temperature enhanced the leaching rate of copper.

Micromechanism Study of Strengthening Effect of

2020-12-15  To study the effect of copper on gold thiosulfate leaching, the gold dissolution of three different sample powders (gold, gold/copper, and gold/copper oxide) in a solution of 5 mM Cu2+, 0.4 M ammonia, and 0.1 M thiosulfate was studied. Scanning electron microscopy analysis showed no sulfur passivation on the gold surface, and there were more prominent corrosion pits on the gold surfaces of

Ultrasonic-enhanced replacement of lead in lead

In this paper, ultrasonic-enhanced replacement of lead by zinc in lead leaching solution was studied. The effects of reaction time, rotational speed, temperature, concentration of leaching solution and the ratio of the surface area of the zinc plate immersed in the leaching solution to the volume of leaching solution (S : V) were studied under both conventional and ultrasonic conditions.