bioleaching of low grade nickel sulfide mineral in

sulfide and silicate ore depends mainly on the treatment of ores even low grade by oxidizing or reducing bacteria To obtain valuable metals from ores as sulfides and silicates there are different technique required Physical physic-chemical and mechanical used in mineral processing Nickel Deposits Explained As the sulphides continue to sink we see net-textured (or matrix) ores which are the most common ore type in most high-grade nickel deposits Here sulphides range from 5 to as much as 50+% of the rock forming a matrix between silicate minerals Depending on the dynamics of the magma chamber the sulphides can be

Nickel The Secret Driver of the Battery Revolution

Oct 30 2017Nickel Sulfides Higher grade but rarer deposits that make up 37 5% of current production Many laterite deposits are used to produce nickel pig iron and ferronickel which are cheap inputs to make Chinese stainless steel Meanwhile nickel sulfide deposits are used to make nickel metal as well as nickel sulfate

To identify the commercial application potential of bioleaching in Iranian copper industry a research program was initiated The objective of the main part of this program was to evaluate bacterial leaching processes for copper recovery from (i) high grade ores and flotation concentrates and (ii) low grade ores and flotation tailings

In this study the GEOCOAT™ process was evaluated as a low cost altemative for chalcopyrite bioleaching The effect of temperature leach solution composition silver addition and type of microorganisms inoculated were investigated in laboratory tests Experiments were carried out at moderate temperature (35–45 C) using a mixed mesophilic bacterial culture and at elevated

Bioleaching is another process that is being looked at for low-grade ores ideal for reworking waste dumps This method under atmospheric pressure is being used in the Talvivaara project in Finland a sulfide mineral resource of only 0 27% Ni Low-grade ores like nickel sulfide are abundant on Earth

【】:Jinchuan low grade nickel(0 4%-0 6% Ni mass fraction)sulfide mineral ore contains a remarkably high content of magnesia(30%-35% MgO mass fraction)present in the main gangue minerals Bioleaching was performed to investigate the feasibility to process the mineral due to its relative simplicity eco-friendly operation and low capital cost requirements The mixed mesophiles


The Efficient Recovery of Cobalt from Low Grade Refractory

Cobalt having many diverse and critical uses is an essential metal in today's society However the recovery of cobalt is difficult due to its associated mineral characteristics A biohydrometallurgical process has been developed for cobalt recovery from low grade refractory carrollite After direct oxidation for 6 days 96 51 % Co and 26 32 % Cu were extracted from the ore using a pulp

Copper extraction refers to the methods used to obtain copper from its ores The conversion of copper consists of a series of physical and electrochemical processes Methods have evolved and vary with country depending on the ore source local environmental regulations and other factors

The Company behind this bioleaching method and process no long exist but the technology still did work Before implementing a commercial-scale GEOCOAT or GEOLEACH™ plant at Owner's site batch amenability small column and large column testwork will be completed to determine the operational and cost benefits of the process for bioleaching the specific ore or concentrate

This study investigated thermophilic bioleaching of a low grade nickel–copper sulfide using mixture of four acidophilic thermophiles Effects of 0 2 g/L l-cysteine on the bioleaching process were further evaluated It aimed at offering new alternatives for enhancing metal recoveries from nickel–copper sulfide

This study was prompted by the disparate recoveries of nickel (70%) and copper (20%) from a test heap of copper-nickel sulfide ore after about 200 days of leaching Variables tested in bioleaching columns charged with a pyrrhotite-rich chalcopyrite and pentlandite ore were acid pre-conditioning inoculation and aeration

all the deposits are low grade and either the deposits are subeconomic or nickel is not the principal mineral mined In addition much of the nickel may be in silicate rather than sulfide minerals For these reasons relative ly little data have been made available about these nickel occurrences

In this study the GEOCOAT™ process was evaluated as a low cost altemative for chalcopyrite bioleaching The effect of temperature leach solution composition silver addition and type of microorganisms inoculated were investigated in laboratory tests Experiments were carried out at moderate temperature (35–45 C) using a mixed mesophilic bacterial culture and at elevated

Abstract The feasibility of oxidation leaching process of nickel from nickel sulfide ore and the form of different components in the lixivium has been studied at first The method of leaching nickel sulfide concentration directly by oxidants with existence of ultrasonic has been advanced The process of leaching nickel from nickel sulfide concentration by using the system of persulfate and

Minerals

Ocean nodules and low-grade nickel sulfide ore are important but less tractable mineral resources of Ni Cu and Co In low-grade nickel sulfide ore nickel minerals occur as fine-particles closely associated with copper cobalt iron and other minerals resulting in a low recovery of valuable metals in terms of traditional ore enrichment

A typical example of a nickel sulRde plant operat-ing with highly Soatable talcose gangue is at Trojan mineinZimbabwe TheZimbabweansulRdedeposits contain very low grades of nickel (0 6%) and copper (0 04}0 4%) The easily Soatable non-sulRde min-erals dilute the grade of the concentrate and also result in nickel losses into the tailings This

complex low-grade sulphide concentrates Specific European mineral resources were targeted and used in integrated piloting campaigns involving bioleaching solution purification and metals recovery This paper describes the use of thermophilic bioleaching for the recovery of nickel and copper from a low-grade nickel-copper

This study was prompted by the disparate recoveries of nickel (70%) and copper (20%) from a test heap of copper-nickel sulfide ore after about 200 days of leaching Variables tested in bioleaching columns charged with a pyrrhotite-rich chalcopyrite and pentlandite ore were acid pre-conditioning inoculation and aeration

Typical nickel laterite ore deposits are very large tonnage low-grade deposits located close to the surface They are typically in the range of 20 million tonnes and upwards (this being a contained resource of 200 000 tonnes of nickel at 1%) with some examples approaching a billion tonnes of material

Beneficiation of low-grade weathered nickel sulfide ore for metallurgical uses Silvia C A Frana Hudson J B Couto Coordination of Mineral Processing CETEM – Centre for Mineral Technology Brazil ABSTRACT In this paper an alternative beneficiation process was developed to recover nickel minerals from low-grade weathered ores

Copper ores suitable for processing mostly occur in various types of deposits The types of deposits with mining value in China include magmatic copper-nickel sulfide deposits porphyry copper deposits sedimentary layered deposits and so on with relatively low grade

May 06 1997Recovery of nickel from bioleach solution United States Patent 5626648 invention relates to the recovery of nickel from solutions generated from the processing of nickeliferrous oxide or sulfide ores by bioleaching BACKGROUND OF THE INVENTION Thus low grade nickel ores in essence could then be treated the same as a high grade ore

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