survey). Services includes: gathering of data. BENCH SCALE COMMINUTION. TEST WORK q Bond Work Index Testing. Bond Ball Work Index. Bond Rod Work Index Pilotscale crushing and screening from 150mm to 6mm mills ( Mintek SAG design test), stirred media milling, scrubbing, HPGR milling, and crushing.
Work Index values (crushing, rod mill and ball mill). Data from 11 mines are the Bond Work Index (Wi) values (Bond, 1952), divided into a low energy crushing work index. (WiC) for coarse rocks Figure 4 displays WiC and UCS values separated by the major rock types from a single African mine. The three rock types do
Feb 26, 2014 GRINDABILITY TESTS Bond Rod mill work Index • The rod mill work Index is also normally distributed with and average and median of 14.8kWh/t • It is common to observe difference between the ball and rod mill caused by variation in ore hardness • The test has been mainly used for the design of rod mill
Mar 15, 2013 scale pilot plant tests, which confirm that highquality iron concentrate can be produced from the The tests were done using six tonnes of crushed drill core, and included impact crushing, rougher Hawsons has a bond work index (a measure of rock hardness) of 6.3KWh/t compared to typical iron ore.
2.2. Materials and experimental procedure. For this study, materials (copper sulphide ore) were sampled from the feed in Sungun copper concentrator plant. Three different samples with different hardness were selected for the experiments. The ore was crushed in a laboratory scale jaw crusher and roll crusher successively.
Work Index values (crushing, rod mill and ball mill). Data from 11 mines are the Bond Work Index (Wi) values (Bond, 1952), divided into a low energy crushing work index. (WiC) for coarse rocks Figure 4 displays WiC and UCS values separated by the major rock types from a single African mine. The three rock types do
May 15, 2017 Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond's Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle
AUTHOR: F.O. VERRET, G. CHIASSON AND A. MCKEN SGS. KEYWORDS. Comminution, grindability, grinding,. SAG mill, AG mill, milling, HPGR, work index, pilot plant. INTRODUCTION. The resistance of ore samples to breakage (or hardness) is measured through grindability testing. Several grindability tests have been
Nov 15, 2014 other properties showed no effect. Keywords: mining, crushing, physical and mechanical properties of rocks, energy, crushed stone, jaw crusher ways, and the most commonly used is Bond work index (Tavares and Carvalho 2007). hardness showed no significant influence on the crushing energy.
2.2. Materials and experimental procedure. For this study, materials (copper sulphide ore) were sampled from the feed in Sungun copper concentrator plant. Three different samples with different hardness were selected for the experiments. The ore was crushed in a laboratory scale jaw crusher and roll crusher successively.
crusher cavity are: • Abrasive wear. • Fatigue wear. The main wearing mechanism in crusher cavity is abrasive wearing. Fatigue wear is also present as wear part Very abrasive. 1700 . 0.8 . crusHAbiLity cLAssificAtion bond work index. [kWh/t] crushability. [%]. Los Angeles value. Ai8mm product shatter index. Very easy.
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
However, the hardness value is entirely arbitrary, it is merely a ranking of the described minerals. The table also includes the Bond. Work Index, which is discussed in the next section. An initial size reduction from material several centimetres in diameter down to one centimetre, or so, is often termed primary crushing.
Minerals in operation. 2. Size reduction. 3. Crushing. Grinding. Size control. 4. Screening. Classifiion. Enrichment. 5. Washing. Gravity separation. Flotation. Magnetic separation. Leaching. Upgrading. 6. Sedimentation. Mechanical dewatering 1:3. Mineral processing and hardness 3:40. Grinding – bonds work index
Mar 22, 2017 The process "Comminution" involves size reduction and sizewise classifiion called as screening or separation. of size reduction methods involved in mineral processing using crushing equipments. . "crushability or grindability", also called work index and the "wear profile", called abrasion index.
conventional crushing followed by wet grinding circuits. This is a . is being carried out wet or dry, the hardness of the ore, the and VRM pilot scale testing was basalt rock obtained from a local quarry. Bond work index testing conducted in these test programs confirmed the sample was relatively hard and comparable to
plex composite mixtures for which the basic building blocks are grains of minerals. The properties of the minerals, how they are bound together, and many other aspects of rock tex ture affect the entire mining value chain from exploration, through mining and processing, waste and tailings disposal, to refining and sales.
Rittinger's theory and law of the energy expended in crushing of rock is that the work of crushing is proportional to the reduction in diameter or, as I have more fully expressed it: Here is an illustration of the typical relationship between the Mohs Mineral Hardness Scale and their corresponding Bond Abrasion Index.
crusher work index hardness classifiion. The value of the bond work index of the above samples has shown a variation provided for calculating crushing index or crusher reduction ratio from UCS or PLT. Get More Info. image
May 15, 2017 Sizing a crusher can be done reliably calculated thanks to the Impact/Crushing Work Index and the testwork research done by Fred Chester Bond and his 1952 paper. According to Bond's Third Theory of Comminution, the work/energy input is proportional to the new crack tip length created during particle
However, the hardness value is entirely arbitrary, it is merely a ranking of the described minerals. The table also includes the Bond. Work Index, which is discussed in the next section. An initial size reduction from material several centimetres in diameter down to one centimetre, or so, is often termed primary crushing.