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Table of Bond Work Index by Minerals 911 Metallurgist
2015年6月19日· Chrome ore: 134: 717: 5: Clay: 63: 69: 70: 71: 108: 423: 11: Clay calcined: 114: 196: 1526: 7: Coal: 113: 130: 143: 145: 114: 154: 1318: 6: Coke: 167: 210: 151: 168: 165: 170: 335: 2940: 4: Coke Petroleum: 745: Copper nickel ore:2016年1月1日· Abrasion index (AI) • Crushing work index (CWI) • Unconfined compressive strength (UCS) • Bond rod mill work index (BRMWI) • Bond ball millMetallurgical Test Work: Gold Processing Options,
Work Index | SpringerLink
2023年7月20日· Work index indicates the difficulty of ore crushing or ore grinding in mineral processing operation The initial definition is the work W i consumed by2019年6月30日· The Crushability Work Indices of the rocks were between 30 and 37 KWh/t, which are generally higher than the maximum design value of 319 kWh/t, and(PDF) Geometallurgical Studies on Gold Ore for Enhanced
(PDF) STUDYING THE EFFECT OF ORE TEXTURE ON THE BOND
2020年1月1日· The maximum difference in the Bond work index for the five tested gold ores was 11% (eg (20,4 kWh/ton – 182 kWh/ton)/ (20,4 kWh/ ton) × 100 11 %)2021年10月28日· The Bond lowenergy impact test, also named impact work index or Bond impact crushing work index, can measure the crushing work index (CWI) andUsing Rock Geomechanical Characteristics to Estimate
Metallurgical testwork demonstrates lowcost crushing and
than average for such ores The ore (irrespective of domain) is unlikely to pose any significant problems with abrasiveness Comparison: Sissingué 0459 Primary blend1Variability Study of Bond Work Index and Grindability Index on Various Critical Metal Ores Metals 2021, 11, 970 https://doi/103390/met Academic Editor:Article Variability Study of Bond Work Index and Grindability Index
A quick method for bond work index approximate value
2017年1月1日· 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 forWhere, WiSTDis the Standard Circuit Bond Work Index (kWh/t) and WioACTis the Actual Operating Bond Work Index (kWh/t) • If the Wi Efficiency Ratio is 10 or 100%, the circuit is performing with the same efficiency as the Bond Standard Circuit (and the ore Wi = circuit operating Wi), in accordance with the correlation that Bond (1962Determining the Bond Efficiency of industrial grinding circuits
Bond Impact Crushing Work Index Tester 911
The Pendulum Tester / Bond Impact Crushing Work Index Tester Working principle Crushing by impact 76 mm maximum feed size Test repetition: At least 10, preferably 20 test runs The Bond Crushing Workgravity of the rock, and the CWI is the crushing work index in kWh/t CWI=5349 ( Eb/d SG) (2) 24 Bond Ball Mill Work Index Samples from the fresh, weathered and the various blends were used for the Bond Ball Mill Work Index test using the standardised procedure detailed by F C Bond (NapierMunn et al, 1996) TheGeometallurgical Studies on Gold Ore for Enhanced
ALTA Gold 2012 EDoc Glencore Technology
For Ore A a Bond ball mill work index value of 17 kWh/t was reported For ore B a Bond ball mill work index value of 15 kWh/t was used Further comminution tests will be required in the future to confirm this is representative of the ores to be processed The bond index values generally indicate that grinding is moderate power consumer2021年6月10日· But as 3ag points out, at most mines, blasting, crushing, grinding and maintenance all work independently of each other to achieve their targets and KPIs This is particularly true when dealing with highly competent ores, such as gold, “but we’re now seeing numerous projects utilising ore with an index of 2224 kWh/tCrushing Energy Efficiency North American Mining Magazine
Crushing Work Index (CWi) results variation Crushing,
The ultimate crushing plant would crush everything to 150 microns or a similar size Beside the ore being pre shattered by blasting, there are other parameters that affect the throughput of a crushing plant These include, but are not limited to: Variations in the ore body Different ore zones crush differently Variations in the state of wear2015年7月29日· The single most common reason for an increase or drop in the production of fines is the WORK INDEX of the ore If you remember, the work index of the ore is a method of measuring the degree of hardness As the ore becomes harder the fracture lines in the rock become cleaner or sharper with less crumbling of the face and edges of theOre Feed Size * Work Index Hardness: Crushing & Mill Tonnage
Procedure for determination of ball Bond work index in the
2009年1月1日· A 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 the energy requiredgravity of the rock, and the CWI is the crushing work index in kWh/t CWI=5349 ( Eb/d SG) (2) 24 Bond Ball Mill Work Index Samples from the fresh, weathered and the various blends were used for the Bond Ball Mill Work Index test using the standardised procedure detailed by F C Bond (NapierMunn et al, 1996) TheGeometallurgical Studies on Gold Ore for Enhanced
Work index of some minerals ores samples ResearchGate
Berry and Bruce modified Bond’s work index was therefore obtained, and was determined to be within the range of 20414 to 25667 kWh/ton Hence, the energy consumed or required to comminute or2023年7月20日· In the expression, W is the energy consumed by crushing unit mass material; F and P are the particle size of the material before and after crushing (the sieving particle size corresponding to the yield under the sieve of 80%, μm) In a given crushing process, the work index calculated according to the W, F, and P values of the actualWork Index | SpringerLink
8 Types of Gold Ore Properties and Ways to Process
2023年6月12日· 1 Wash, filter, and grind the granite ore into smaller pieces 2 Put the ground ore into a tank containing a dilute cyanide solution and add zinc The chemical reaction between a dilute cyanide solution and zinc will separate the gold from the ore 3 Use a filter press to remove the gold from the solution2021年1月14日· standard Bond crushing, and rod mill work indices, abrasion indices and by Dawson for Bond Ball Mill Work Index tests using crushed feed, and Standard Autogenous Grinding Design (SAGDesign) Tests, patented by Outokumpu (See reference 8 below) The comparison of these results gives context to how the various measurementsComparison of Ore Hardness Measurements for Grinding Mill
Using Rock Geomechanical Characteristics to Estimate Bond Work Index
2021年10月28日· The Bond lowenergy impact test, also named impact work index or Bond impact crushing work index, can measure the crushing work index (CWI) and describes the competency of the ore at larger particle sizes The Bond lowenergy impact test calculates the actual crusher power requirements The crushing work index (CWI)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 testBond Work Index an overview | ScienceDirect Topics
Gold extraction
Types of ore Gold occurs principally as a native metal, ie, gold itselfSometimes it is alloyed to a greater or lesser extent with silver, which is called electrumNative gold can occur as sizeable nuggets, as fine grains or flakes in alluvial deposits, or as grains or microscopic particles (known as colour) embedded in rock minerals Other forms of goldGeometallurgical Studies on Gold Ore for Enhanced Comminution and Leaching* 1G OforiSarpong, gravity of the rock, and the CWI is the crushing work index in kWh/tGeometallurgical Studies on Gold Ore for Enhanced
HPGR High Pressure Grinding Rolls 911 Metallurgist
2016年7月13日· Tests can be completed at minimal cost within 4 to 6 weeks Reliable scaleup procedures are provided Polycom highpressure grinding roll pilot plant facilities are available for gold mining companies at the Krupp Polysius Test Center HPGR or highpressure grinding rolls have made broad advances into nonferrous metal miningGeometallurgical Studies on Gold Ore for Enhanced Comminution and Leaching* 1G OforiSarpong, gravity of the rock, and the CWI is the crushing work index in kWh/tGeometallurgical Studies on Gold Ore for Enhanced
Bond Work Index Procedure and Method 911 Metallurgist
2015年6月6日· Preparation of Test Feed Sample for Bond Work Index Procedure: Riffle 810 kilograms of minus half an inch feed into 500 gram charges Riffle one 500 gram charge of ore down to splits of 125 grams each Record the exact weight of one split; identify it as Feed No 1 Wet screen through a 150 mesh screen