Leaching - Mining Fundamentals

After 548 days of leaching of the first heap that was the most representative of the ore site the recoveries of nickel and cobalt were 79 4 and 82 7 respectively with calculated 528 kg tonne of dry ore acid consumption Oxley et al 2006 Oxley et al 2007


Page ii SYNOPSIS Leaching of nickel laterite was conducted with a solution of ammonia and ammonium carbonate in a closed vessel The vessel used in this study was designed to leach and perform solid-liquid separation at the same time For solid-liquid

Processing of Nickel Laterite Ores on the Rise

In the heap leaching process very dilute sulphuric acid similar in strength to some acid‐based household cleaning products is slowly applied to crushed nickel ore on a lined pad to dissolve the nickel and cobalt contained in the rock in a several month process

Pressure acid leaching of Çaldağ lateritic nickel ore An …

Leaching is a chemical process in mining for extracting valuable minerals from the ore Leaching also takes place in nature where the rocks are dissolved by water Post leaching the rocks areleft with smaller proportion of minerals that they originally contained


Nickel is a chemical element with the symbol Ni and atomic number 28 It is a silvery-white lustrous metal with a slight golden tinge Nickel belongs to the transition metals and is hard and ductile Pure nickel powdered to maximize the reactive surface area shows a significant chemical activity but larger pieces are slow to react with air

US3809549A - Acid leaching of lateritic ore - Google Patents

High pressure sulphuric acid leaching of lateritic nickel ore 477 leaching time on high pressure sulphuric acid leaching of a local lateritic nickel ore sample having 1 37 Ni were investigated by using chemical and X-ray diffraction analyses Other than nickel the

Atmospheric acid leaching of nickel laterites review Part I …

A New Process for Co-Ni Separation ALTA 2010 3 excellent cobalt-nickel separation primary leach liquor by Cyanex 272 However manganese extraction from the leach liquor along with cobalt could not be avoided thus increasing the cost of the process For


2 1 INTRODUCTION Owing to the potential for comparatively low capital costs and lower economic cut-off ore grades heap leaching has been proposed as an alternative processing route for the processing of nickel laterites by a number of recent projects including


leaching of nickel from the ore at a constant total iron The entire experiment was carried out at room temperature The objective of the study was thus to calculate the amount of nickel leached or extracted from a low grade ore by bio leaching …


In this paper the selective acid leaching of nickel from the pre-reduced limonitic laterite under moderate HPAL conditions was studied For the calcine with reduction degree of 93 4 about 88 2 nickel could be selectively extracted at 100 C with an acid ore

Microbial Leaching of Nickel from Pomalaa Saprolite Ores Using …

The subject of this study is leaching process of nickel-bearing laterite ore from Ržanovo R Macedonia The influence of sulfuric acid concentration 0 5 1 and 3 M H2SO4 on the extracted Ni wt was studied The leaching process intensified by magnetic

8 Microbial Leaching of Metals

3 Nickel extraction in the 3 5 metre high laboratory column loaded with agglomerated Lucky Break ore recorded 67 after a period of 338 days leaching and the acid consumption is 429 kg t Vat leaching testwork for the same period has achieved similar Ni

The Development of Nickel Laterite Heap Leach Projects Rev 0

1 Leaching of a low-grade copper-nickel sulfide ore 1 Key parameters impacting on Cu recovery during column bioleaching H R Watling1 A D Elliot 1 M Maley 2 W van Bronswijk2 and C Hunter3 1 AJ Parker Cooperative Research Centre for Integrated Hydrometallurgy Solutions CSIRO

US6312500B1 - Heap leaching of nickel containing ore - …

leaching operations were the height of the heap particle size initial ore washing with acid and temperature control to about 50 C SALKIELD 1987 Another critical factor was the supply of water for the leaching heaps Al-though usually acidic mine waters were

Ammonia nitric Acid Leaching of Copper- Cobalt Oxidized Ore

Lateritic nickel ore deposits are surficial weathered rinds formed on ultramafic rocks They account for 73 of the continental world nickel resources and will be in …

How Sherritt Refines Nickel

In this process the leaching of a nickel laterite ore generates a pregnant leach solution containing more than 10 30 g L Fe III that is used for the leaching nickel sulphide ore either sequentially or simultaneously Saprolite ore can then be used for neutralisation

High Pressure Acid Leach - Caldera Engineering

et al 19 The patent s idea is to use poor nickel ore or waste for pH adjustment after the atmospheric acid leaching of nickel cobalt copper or zinc Iron dissolved in the atmospheric leaching precipitates and acid generated during the iron precipitation reaction

Pressure Acid Leaching of Nickel Laterites A Review …

Microbial Leaching of Nickel from Pomalaa Saprolite Ores Using Fungal Consortia Astuti W 1 Mubarok M Z2 and Chaerun S K3 1 Mineral Processing Division of Indonesian Institute of Sciences LIPI

A New Process for Cobalt Nickel Separation

High Pressure Acid Leach HPAL is a process used to extract nickel and cobalt from laterite ore bodies The HPAL process utilizes elevated temperatures roughly 255 degrees Celsius elevated pressures roughly 50 bar or 725 psi and sulfuric acid to

Oxidized Nickel Ore Heap Leaching SpringerLink

The leaching of lateritic nickel ores in hydrochloric acid Abstract The extraction of nickel and iron itic nickel ore deposits Although rela-tively low in nickel one per cent on average

Computer modeling of high-pressure leaching process of nickel …

nickel extraction in the existing depletion of high-grade sulfide ores around the world computer modeling of nickel ore leaching process be-came a need and a challenge In this paper the design of experiments DOE theory was used to determine the optimal In

Nickel - Wikipedia

A process is provided for heap leaching ore to recover nickel The process is particularly effective for ores that have a tangible clay component i e greater than about 10 by weight The process includes sizing the ore where necessary forming pellets by

Srećko Stopi Sulphuric Acid Leaching of the Serbian Nickel Lateritic Ore

Leaching Refining metals at Sherritt begins with the leaching of cobalt and nickel from a variety of feed materials The cobalt feeds are segregated into high and low cobalt containing types and are fed to different locations in the plant The high cobalt feeds consist

Lateritic nickel ore deposits - Wikipedia

198 ERZMETALL 56 2003 Nr 4Srećko Stopić et al Sulphuric Acid Leaching of the Serbian Nickel Lateritic Ore Laterites are oxide ores widely distributed in the equatori-al regions Lateritic deposits usually consist of three layers namely the limonitic the

PDF The leaching of lateritic nickel ores in hydrochloric acid

Processing oxidized nickel ores ONO by shaft smelting is unprofitable Introduction of hydrometallurgical methods will resolve this problem In this work according to X-ray phase X-ray diffraction and X-ray spectral microanalysis XMA the main sources of nickel and cobalt in the ONO are minerals of the serpentine group primarily lizardite and antigorite Heap leaching of nickel from

Selective leaching of nickel from prereduced limonitic laterite …

Abstract A review of the literature over the past 30 years on the processing of nickel laterites by high temperature acid leaching has been carried out to provide a better understanding of the mineralogy leaching process chemistry and effect of operating conditions on

Leaching of a low-grade copper-nickel sulfide ore 1 Key parameters impacting on Cu recovery during column bioleaching

leaching stated that the process of nickel heap leaching is particularly effective for ores that have nickel-containing greater than about 10 by weight 5 these series of research can prove that heap laeching for laterite ore with low content of nickel

Designing Heap Leaching for Nickel Production that …

nickel slurry ore leaching pyrites Prior art date 1970-07-08 Legal status The legal status is an assumption and is not a legal conclusion Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed Inventor

Iron Control in Atmospheric Acid Laterite Leaching

during the process This is Abstract— The alkaline leaching behaviour of rich copper- cobalt oxidised ore from Katanga has been investigated Copper was leached in ammonia nitric acid solution at room temperature The effects of time ammonia concentration

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