copper ore grindability test

Using Rock Geomechanical Characteristics to Estimate Bond …

The second purpose is to estimate ore samples' geomechanical properties and Bond work index, as an indicator of grindability, for an extraction bench in the …

Abrasiveness Evaluation of Pre-Concentration of Copper Sulfide Ore

Metal. Mater. Miner., São Paulo, v. 15, n. 2, p. 91-95, abr./jun. 2018 Abrasiveness evaluation of pre-concentration of copper sulfide ore products through LCPC test 2 MATERIALS AND METHOD Copper sulfide ore from Mineração Caraíba S/A's Boa Esperança Project, state of Pará [14], was used in this study.

Correction of Bond Ball Mill Work Index Test for Closing …

The test work program was carried out on those five ore samples obtained from the copper-porphyry orebodies. Total of 38 Bond work index tests, including duplicates, were done. Standard Bond ball mill test procedure were carried out on crushed (-3.35 mm / 6 mesh) material at different

BOND'S WORK INDEX: WHAT IT IS AND WHAT IT ISN'T

Bond's work index model of quantifying mineral grindability was born out of the desire for a better way of scaling up laboratory grindability test results to industrial-scale grinding mills (Lynch & Rowland, 2005). The Allis-Chalmers company (now ) collected a great deal of operating and laboratory data during the 1930s

A new approach to the calculation of bond work index

Berry and Bruce (1966) and Horst and Bassarear (1977) devised an approximate procedure comparing the grindability data of an unknown ore with a reference ore whose grindability data are known and determined in a Bond ball mill. The test is performed on samples of size −1.651 mm in any laboratory mill with balls.

Ore Grindability

The relative grindability is the ratio of the ore to be tested to the standard ore with known grindability under the same test method and test conditions, with limestone usually used as the standard medium hard ore. Absolute grindability is the grindability value of the ore measured under the specified test method and test …

Energy Sources, Part A: Recovery, Utilization, and …

The present work initially studies the impact of a laboratory microwave (MW)'s location (before and after a jaw crusher) on grindability of a copper ore. Additionally, the role of MW's radiation time (15–150 sec) and grinding time (13, 15 and 17 min)

Estimation methodology for Bond ball mill work index …

The Bond ball mill work index test is a standard procedure to determine the ore grindability in function of specific energy (kWh/ton). ... Impure minerals, Limestone (98% CaCO 3), fluorite (75% CaF 2), copper ore (2.5% Cu), and hematite (19% Fe) ores were used to run the tests. Initially, the sample (20 kg) is crushed to , passing at …

Bond Grindability Test Procedure

Bond Grindability Test Procedure. The Bond Ball Mill Grindability test is designed to give a measure of the grinding characteristics of a material by finding the amount of size reduction …

Determination of the Bond work index on samples of non …

1. Introduction. The Bond grindability test for determining the Bond work index, W i, is conducted in a Bond ball mill having the dimensions D × L = 305 × 305 mm and a speed revolution of 70 min − 1.The mill is loaded with balls from 15.5 up to 30.6 mm in diameter, having thus a total mass of 20.125 kg.. This test simulates a closed circuit …

A new methodology to obtain a corrected Bond ball mill …

Samples of dacite and basalt from Serbia, copper ore from a South American meta-sedimentary copper mine, and copper porphyry ore from Canada, of different …

Variability Study of Bond Work Index and Grindability Index on Various

The ball mill grindability test is used for describing ore hardness and it is so widespread that the Bond Work Index generated from the test is often referred to as an ore characteristic. The ore ...

BOND'S WORK INDEX: WHAT IT IS AND WHAT IT ISN'T

The commonly used grindability tests included in the database are the Bond work indices for ball milling, rod milling and crushing; the drop weight test results A, b, A×b, DWi, Mia, Mic, Mih and ...

A new approach to the calculation of bond work index

This method uses a mathematical algorithm to simulate the Bond test based on the results obtained from the first two grinding cycles of the standard test to …

Simulating the Bond rod mill grindability test

The ball mill grindability test is used for describing ore hardness and it is so widespread that the Bond Work Index generated from the test is often referred to as an ore characteristic. ... Copper ore 10 Initial 150 rotations 200 rotations 250 rotations 1 100 1000 Data from the batch grinding tests were modeled using the sizemass balance ...

-Average surface bulk temperatures and measured Bond …

Bond work index grindability values decreased for the vein type copper ore (ore 2) in which fusing of particles was not observed. The largest decrease, i.e. improvement, in the work index (by 13% ...

Variability Study of Bond Work Index and Grindability …

A detailed description of Barruecopardo ore can be found in recent publications [32,33]. In the case of Mittersill, an ore description can be found in [34]. The third W ore was Wolframite from the Panasqueira Mine (Portugal), and a detailed de‐ scription of this ore can be found in [35].

A Methodology to Estimate Ores Work Index Values, Using Miduk Copper

After milling for 15 min, a representative sample of 150 g from each test was subjected to sieving by vibrating sieve shaker. Mular and Bhappu (1980) and Noaparast et al. (2012) showed that the ...

Secrets of the Bond Ball mill grindability test

The Bond ball mill grindability test is one of the most common metrics used in the mining industry for ore hardness measurements. The test is an important part of the Bond work index methodology ...

Effect of mineralogy on grindability – A case study of …

The effect of mineralogy on the grindability was investigated using three copper ores – two sulphides and one oxide. The dominant copper minerals were identified by optical microscopy and

Metals | Free Full-Text | A Review of Alternative Procedures …

Over the years, alternative procedures to the Bond grindability test have been proposed aiming to avoid the need for the standard mill or to reduce and simplify the grinding procedure. Some of them use the standard mill, while others are based on a non-standard mill or computation techniques. Therefore, papers targeting to propose a better …

Standard Bond Ball Mill Grindability Test Method-Procedure

Here is the old Allis-Chalmers Bond Work Index Grindability Test Procedure. The standard feed is prepared by stage crushing to all passing a 6 mesh sieve, but finer feed can be used when necessary. ... Ore Laboratory Testwork. Comminution Testing; Mineral Liberation; Gravity Concentration Testing; Flotation Testing; …

Bond Ball Mill Grindability Test Summary

The ball mill grindability test is used for describing ore hardness and it is so widespread that the Bond Work Index generated from the test is often referred to as an ore characteristic.

Estimation methodology for Bond ball mill work index …

The Bond ball mill work index test is a standard procedure to determine the ore grindability in function of specific energy (kWh/ton). ... s grindability from the batch test. Aksani and Sönmez (2000) used a cumulative kinetic model to simulate the Bond Grindability Test. This test was carried out to determine the work indices of Copper ...

SAG MILL TESTING

Several grindability tests were developed over the years to design grinding circuits or optimize existing operations. Each test has its own strengths and weaknesses and it is imperative to select the proper test procedure(s) to meet project deliverables and minimize the risk of a project. Pilot plant testing of large bulk samples historically constituted the …

(PDF) Effect of microwave pretreatment on grinding and …

The grindability test showed that the MW-treated iron ore ground much more rapidly than the unmicrowaved ore. 0.9 kW Breakage function of microwaved and untreated iron ores was dependent Kumar et al. [34] Iron ore (Orissa, India) …

Secrets of the Bond Ball mill grindability test

The Bond ball mill grindability test is one of the most common metrics used in the mining industry for ore hardness measurements. The test is an important part of the Bond work …

SAG Mill Testing

The pilot plant can test coarse feeds (150mm), as well as essentially any test conditions, so it presents the lowest degree of scale-up within all the methodologies available, but pilot …

Effect of process mineralogy on grindability – A …

PDF | On Apr 19, 2021, Godfrey Dzinomwa and others published Effect of process mineralogy on grindability – A case study of copper ores | Find, read and cite all the research you need on ...

Procedure for determination of ball Bond work index in …

1.. IntroductionA Bond Ball Mill Work Index test is a standard test for determining the ball mill work index of a sample of ore. It was developed by Fred Bond in 1952 and modified in 1961 (JKMRC CO., 2006).This index is widely used in the mineral industry for comparing the resistance of different materials to ball milling, for estimating …