Procedure For Determination Of Ball Bond Work Index In, The bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed it provides the bond ball mill work index which expresses the resistance of material to Bond Rod Mill Work Index Essa
Using a novel ring mill a laboratory ball mill a labora tory rod mill and the semi continuous process using the same rod mill as described below in all cases the min eral sample is crushed and screened to pass a predeter mined size 35 or 4 mm the feed sample undergoes a wet screen analysis and a certain quantity usually 05
The grinding jar for the bond index rod mill is 12 x 24 in size and has a waveshaped design at least 15 to 20 kg sample material is required to simulate a closed grinding circuit in a ball or rod mill the rod mill work index rwi is used for particle size determination in a size range from 25 mm down to 21 mm whereas ball mill work
Using a novel ring mill a laboratory ball mill a labora tory rod mill and the semi continuous process using the same rod mill as described below in all cases the min eral sample is crushed and screened to pass a predeter mined size 35 or 4 mm the feed sample undergoes a wet screen analysis and a certain quantity usually 05
Figure 5 bond rod mill work index v unconfined compressive strength 0 100 200 300 400 ucs mpa 5 10 15 20 25 30 35 wirm metric the lack of fit observed relating the crushing work index was expected to carry over to the other bond live chat titan bond work index rod mill new for sale in canada
Essa manufactures a range of metallurgical laboratory size ball and rod mills to suit most applications included in the range is a bond index mill which has specific
The bond rod mill grindability test is a widely used tool to estimate the response of ores to rod milling however the mass of ore required to conduct the test which can typically vary from
Wave liner bond rod mill testwork bond rod mill work index sagmillingcom the bond rod mill work index is not as common as the bond ball mill work index and there are two different variations on the mill apparatus the sagmillingcom models expect a mill with a wave liner and is not compatible with mills using smooth liners get price bond s rod mill for work
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 measurements relate to each
Bond test wis kwht rod mill ball mill 95 kwht8 9 kwht bond standard circuit work index assume the rod mill work index of 95 applies from the actual rod mill feed sizeof 19300 m although some of this work might ideally be done by crushers to achieve a rod mill f80 of 16000 m to a rod
Bond f c crushing tests by pressure and impact trans aime vol 169 1947 pp 5866 bond rod mill grindability test the test determines the bond rod mill work index which is used with bonds third theory of comminution to calculate net power requirements when sizing ball mills various correction factors may have to be applied
The standard bond rod mill work index test procedure is firstly to stage crush the feed to pass 127 mm and size a representative sample the test then involves a series of batch grinds in a standard bond rod mill a bond rod mill is 0305m by 0610m with wave liners of a form described by bond which runs at 40rpm and tilts as described
Rod milling is fitted to a tumbling test referred to as the bond rod mill work index wirm or rwi the apparatus used to determine this work index was described in 1943 by bond maxton and a slightly different apparatus was described by bergstrom in 1985
The bond ball mill grindability test is run in a laboratory until a circulating load of 250 is developed it provides the bond ball mill work index which expresses the resistance of material to
Bonds approach consists of determining the ore hardness characteristics or work index wi via standardized laboratory testwork the full suite of bond comminution tests provide the ball mill work index bwi the rod mill work index rwi the crusher work index cwi and the abrasion index
Determining the bond work indexes of a sample involves tests using laboratory scale grinding circuits a unit weight is determined by achieving maximum packing of the prepared ore sample the unit weight is then fed into the circuit with undersized product being replaced by
Essas ball and rod mills can be supplied as complying machines with the appropriate barrels and ball or rod charges as with our standard range of ball and rod mills the essa bond index ball mill and bond index rod mill are supplied standard with a barrel and rotating yoke assembly and the electric motor drive mounted on a stand alone
the bond ball mill work indices determinations gave reasonably reproducible results significant variation was observed in the measurement of the bond rod mill work index on at least one sample tested and large variations in abrasion index and crushing work index were due to variations in the test method across the laboratories
The titan bond work index rod mill is onepiece cast construction with integral wave liners of a form described by bond this mill is used to perform the necessary metallurgical testing to determine the grinding characteristics of ores and power requirements for operating productionsize rod mills
The bond rod work index test determines the resistance of ore to grinding in a rod mill expressed as a work index kilo watt hour per ton kwht the work index is then used to calculate the specific energy requirements for sizing rod mills or determining their throughput for a target grind sample requirements 15kg 125mm
Measuring ore grindability in rod mills the bond rod mill work index is a measure of the resistance of the material to grinding in a rod mill it can be used to determine the grinding power required for a given throughput of material under rod mill grinding conditions it is a locked cycle test conducted in closed circuit with a laboratory
Bonds approach consists of determining the ore hardness characteristics or work index wi via standardized laboratory testwork the full suite of bond comminution tests provide the ball mill work index bwi the rod mill work index rwi the crusher work index cwi and the abrasion index
Milling rod ball mills including bond ball work grindability index marc manufactures a wide range of ball and rod mills to suit most metallurgical laboratory applications our range extends from small 6l jartype mills that are manually positioned on rollers to large 30l size mills
Generally bond work index is a common method for selecting comminution equipment as well as estimation of grinding efficiency and calculating required power in the current research a simple fast and accurate procedure is introduced to find the rodmill work index based on the conventional bond work index
The bond rod mill work index is not as common as the bond ball mill work index and there are two different variations on the mill models expect a mill with a wave liner and is not compatible with mills using smooth liners
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