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Table of Bond Work Index by Minerals 911 Metallurgist

This Table of Ball Mill Bond Work Index of Minerals is a summary as tested on ‘around the world sample’. You can find the SG of each mineral samples on the other table.

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Bond Work Index an overview ScienceDirect Topics

The rod mill work index laboratory test is conducted by grinding an ore sample prepared to 80% passing 12.7 mm (½ inch, the original test being developed in imperial units) to a product size of approximately 1 mm (in the original and still the standard, 14 mesh; see Chapter 4 for definition of mesh), thus determining the rod mill work index (WiR or RWi).

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Lowering of Grinding Energy and Enhancement of Agglomerate

31/05/2007· The grinding work index for preheated laterite was obtained about 35% lower than that of no preheated original ore. Generally, the experimental results showed that preheating treatment promoted in increasing the crushing strength of briquette and decreasing energy consumption for the grinding of laterite ore.

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Investigation of the Index Properties of Lateritic Soil

Findings from this work indicate. that reworking by termites . has improved the index properties of . the studied. termite . reworked soils. Keywords: Investigati. on, Index, Termite, Laterite, Road. INTRODUCTION. Lateritic soils abound in virtually all parts of the . tropical world. They find wide applications not only as . foundations for structures but more importantly as . construction

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REVIEW OF THE PAST, PRESENT, AND FUTURE OF THE

07/08/2020· Laterite ores are becoming the most important global source of nickel and cobalt. Pyrometallurgical processing of the laterites is still a dominant technology, but the share of nickel and cobalt produced by the application of various hydrometallurgical technologies is increasing. Hydrometallurgy is a less energy-demanding process, resulting in lower operational costs and

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EXTRACTION OF NICKEL AND COBALT FROM LATERITIC ORES BY

all material and results that are not original to this work. Name, Last Name: Onur Saka Signature: v ABSTRACT EXTRACTION OF NICKEL AND COBALT FROM LATERITIC ORES BY NITRIC ACID Saka, Onur M.S., Department of Metallurgical and Materials Engineering Supervisor: Prof. Dr. Yavuz A. Topkaya December 2014, 132 pages This thesis study is related to the extraction kinetics of nickel

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Leaching Laterites: Two New Processes Make Progress E & MJ

But they’re also low grade, with limonite-type laterite deposits containing around 1%-2% Ni and saprolite-type ore a little more, up to 2.5% Ni-and they have other specific characteristics that make acceptable rates of metal recovery a difficult proposition. Nevertheless, they are estimated to contain more than 70% of the world’s known nickel resources and are a tantalizing target for

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Mineralogy and crystal chemistry of a low grade nickel

Turkey, Africa, India and Australia, but little work is found on Indonesia laterite ores. The association of metals such as Mg, Ni, Mn and Co with goethite has been rigorously studied by previous researchers [10], but fewer studies have been completed on the metals association within low grade laterite ore. In this work, low grade nickel laterite sample from Indonesia for a subsequent Ni

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Bond Work Index an overview ScienceDirect Topics

The Bond work index is not solely a material constant but is influenced by the grinding conditions. For example, the finer the grind size desired, the higher is the kWh/t required to grind to that size. Magdalinovic [38] measured the Bond work index of three ore types using different test screen sizes. He produced a correlation between the mass of test screen undersize per revolution, G, and

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Lowering of Grinding Energy and Enhancement of Agglomerate

31/05/2007· The grinding work index for preheated laterite was obtained about 35% lower than that of no preheated original ore. Generally, the experimental results showed that preheating treatment promoted in increasing the crushing strength of briquette and decreasing energy consumption for the grinding of laterite ore.

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Ni-Co Mineralization in the Intex Laterite Deposit

The Ultramafic Index of Alteration (UMIA) and Index of Lateritization (IOL) are used to characterize the different stages of weathering of rocks and laterites. The calculated index values correspond to a less advanced stage of weathering of the Intex laterites compared with the Berong laterites. The Berong deposit is a Ni-Co laterite deposit in

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Laterite and Laterization A Geomorphological Review

Laterite has immense economic value as it contains the ores of iron, aluminium and manganese. The use of laterite as an ore of iron is of very old standing, but its recognition as a source of aluminium is due to the work of Holland and of manganese to the work of Fermor. Contents of gold placer

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Leaching Laterites: Two New Processes Make Progress E & MJ

But they’re also low grade, with limonite-type laterite deposits containing around 1%-2% Ni and saprolite-type ore a little more, up to 2.5% Ni-and they have other specific characteristics that make acceptable rates of metal recovery a difficult proposition. Nevertheless, they are estimated to contain more than 70% of the world’s known nickel resources and are a tantalizing target for

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CORRELATION BETWEEN BOND WORK INDEX AND

used to determine the work index of any type of ore or material. But the process is . Gamal S. Abdel Haffez 272 tedious and long time consumption. Hardgrove index and brittleness test can be carried out easily on only those ores or rocks or materials, which are soft, friable and brittle [1-3]. Indices with which the crushing resistance or the grindability in a wide meaning is expressed include

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Effective Utilization of Limonitic Nickel Laterite via

The results indicate that the used laterite ore imported from the Philippines is identified as limonitic nickel laterite with 1.09% NiO and 3.45% Cr 2 O 3, which is characterized by a much lower iron grade of only 45.09% and higher Al 2 O 3, MgO, and LOI contents as high as 4.50%, 5.58%, and 12.49%, respectively, compared with that of the ordinary iron ores. This has serious adverse impacts on

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Metal Recovery from Low Grade Ores and Wastes Plus

combined limonitic-saprolitic ore leaching. For laterites, also a promising solvolixiviant was found, resulting in >90 % nickel yield with high selectivity against iron. Solvometallurgical leaching was as well a promising method for treating landfilled Cr-rich sludge, with leaching yields of 82 % and 83 % for chromium and nickel, respectively. In addition, >90 % yields for chromium and nickel

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Peningkatan Kadar Nikel Dalam Laterit Jenis Limonit Dengan

In Indonesia, laterite nickle ore that is low grade nickel (<1.5%) has not been used well because it is not considered beneficial. At present work, the experiment to increase nickel grade in the limonitic type of laterite ores has been caried out by pelletizing a limonitic type of laterite ores, coal and Na2SO4 mixture, it was followed with reduction roasting of pellet in muffle furnace at

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Effect of Quaternary Basicity on Melting Behavior and

1. Introduction. Crude ferronickel can be produced from laterite ores by a number of pyrometallurgical processes. 1,2,3,4) It is an inexpensive alternative to electrolytic nickel used for stainless steels manufacturing. 5,6) Current commercial pyrometallurgical processes include the blast furnace smelting process (BF), 5,6) rotary kiln-electric furnace smelting process (RKEF), 7,8) and Krupp

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Laterite and Laterization A Geomorphological Review

Laterite has immense economic value as it contains the ores of iron, aluminium and manganese. The use of laterite as an ore of iron is of very old standing, but its recognition as a source of aluminium is due to the work of Holland and of manganese to the work of Fermor. Contents of gold placer

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CORRELATION BETWEEN BOND WORK INDEX AND

used to determine the work index of any type of ore or material. But the process is . Gamal S. Abdel Haffez 272 tedious and long time consumption. Hardgrove index and brittleness test can be carried out easily on only those ores or rocks or materials, which are soft, friable and brittle [1-3]. Indices with which the crushing resistance or the grindability in a wide meaning is expressed include

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QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE VALUE

Abstract: The Bond work index is a measure of ore resistance to crushing and grinding and is determined using the Bond grindability test. Its value constitutes ore characteristic and is used for industrial comminution plants designing. Determining the Bond work index value is quite complicated, time- consuming and requires trained operating personnel and therefore is subjected to errors. A

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Leaching Laterites: Two New Processes Make Progress E & MJ

But they’re also low grade, with limonite-type laterite deposits containing around 1%-2% Ni and saprolite-type ore a little more, up to 2.5% Ni-and they have other specific characteristics that make acceptable rates of metal recovery a difficult proposition. Nevertheless, they are estimated to contain more than 70% of the world’s known nickel resources and are a tantalizing target for

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NICKEL EXTRACTION FROM GÖRDES LATERITES BY

lateritic ores. In this study, nickel extraction from Manisa-Gördes region laterites by hydrochloric acid leaching is aimed. The mineralogical analysis of sample showed that hematite, goethite, dolomite, quartz and smectite are the main minerals in the ore. Attrition

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Multi-index analysis of the melting process of laterite

11/04/2019· Herein, a multi-index analysis of the nickel content of an alloy, output rate of the alloy, nickel recovery rate, and iron recovery rate during the melting of laterite metallized pellets was performed. The thermodynamic reduction behavior of oxides such as NiO, FeO, Fe3O4, and Cr2O3 was studied using the FactSage software, which revealed that SiO2 is not conducive to the reduction of

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Mapping the Chemical Composition of Nickel Laterites with

01/09/2013· The aim of the work was to test the feasibility of acquiring spectral reflectance data for retrieving quantitative compositional information on nickel laterites exposed in mine bench walls as a routine sampling method for ore-grade control in a mining operation. The spectral reflectance data record complex variations in mineralogical and chemical compositions of nickel laterites.

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Effect of Quaternary Basicity on Melting Behavior and

1. Introduction. Crude ferronickel can be produced from laterite ores by a number of pyrometallurgical processes. 1,2,3,4) It is an inexpensive alternative to electrolytic nickel used for stainless steels manufacturing. 5,6) Current commercial pyrometallurgical processes include the blast furnace smelting process (BF), 5,6) rotary kiln-electric furnace smelting process (RKEF), 7,8) and Krupp

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Direct and indirect bioleaching of Co and Ni from iron

13/04/2021· In this research work, the bio-leaching of Co and Ni from an iron-rich laterite ore is assessed using the acidophilic heterotrophic (Delftia acidovorans)and autotrophic (Acidithiobacillus ferrooxidans) bacteria. The metabolic products of the acidophilic bacteria play an important role in bio-leaching. The results obtained from the indirect bio-leaching indicate the highest nickel recoveries of

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USGS Open-File Report 2011-1058, data

Potential resources were estimated at 21.6 Mt of ferruginous laterite ore with average thickness 2.0 m at 1.1% Ni, and 19.2 Mt of saprolite ore 1.1 m average thickness at 1.2% Ni. 2.1 m intersection with 2.441 g/t Au was discovered in Ni-bearing laterite-saprolite in drill hole no. 1 (Martinez and others, 2009).