A 1 5 mio t a cement plant is having a closed circuit ball mill for cement grinding The mill has been operating with satisfactory performance in-terms of system availability and output however power consumption was on higher side 3 1 System Description Mill Rated capacity 150 t h OPC at 2800 blaine I chamber liners
Mill power Usually plant operators use mill power readings as an indicator of ball filling degree and often try to keep it at the maximum level It is well known that the mill absorbed power depends on operating parameters other than ball level such as pulp density and liner configuration Figure 2 shows that there is no linear relation between
Metallurgical ContentOpen Circuit GrindingClosed Circuit GrindingGrinding Circuit Process Control VariablesGrinding Operating Costs The simplest grinding circuit consists of a ball or rod mill in closed circuit with a classifier the flow sheet is shown in Fig 25 and the actual layout in Fig 9 This single-stage circuit is chiefly employed for coarse grinding when a product finer than 65
Every 100 cm² g increase in cement fineness increases the mill power consumption by 1-2 kWh t for a closed circuit mill 2-3 kWh t for an open circuit mill a sheer waste if this is not required by the market 20 25 30 35 40 45 50 55 60 2500 3000 3500 4000 4500 5000 Open circuit kWh t Closed circuit …
Grinding control strategy on the conventional milling circuit of Palabora Mining Company by B J du Plessis Where Pwri = power consumption by the i th cyclone feed pump kWh Di = cyclone i feed density The only manipulated variable available in the closed milling circuit ball mill 2 is the cyclone dilution water flow rate
Calculation Of Power Consumption For Ball Mills And Grinding We are a large-scale manufacturer specializing in producing various mining machines including different types of sand and gravel equipment milling equipment mineral processing equipment and building materials equipment
Laboratory tests in small batch mills to determine the specific energy consumption Energy and power calculations based on Bonds Work Index Wi Two stage AG-grinding with the primary mill in open circuit and the secondary pebble mill in closed circuit AMIT 135 Lesson 6 Grinding Circuit
by Erdem 2002 for dry multi-component cement grinding ball mills using the results of the Bond ball mill grindability test For all model based methods a reliable method to calculate mill power draw for a given mill is required for the calculation of power draw Morrell 1996 proposed a
A 1 5 mio t a cement plant is having a closed circuit ball mill for cement grinding The mill has been operating with satisfactory performance in-terms of system availability and output however power consumption was on higher side 3 1 System Description Mill Rated capacity 150 t h OPC at 2800 blaine I chamber liners
• Power Consumption Dropped 20 -25 Although test results were positive screens were ruled out due to the conducted with a ball mill in closed circuit with a hydrocyclone to establish a correlation between the pilot plant and commercial plant operation Next a single-deck Stack
ball mill specific power consumption Posted On 2014 04 12 By limingfwh Posted in Calcium Carbonate process plant Pleasant Hill Grain Grain Mill Nutrimill Bosch Mixer FL HPGR High pressure grinding roller power consumption in ball mill calculate specific power consumption of a ball mill in How Much Crusher ball mill specific energy
For many decades the two-compartment ball mill in closed circuit with a high-efficiency separator has been the mill of choice In the last decade vertical mills have taken an increasing share of the cement milling market not least because the specific power consumption of vertical mills is about 30 less than that of ball mills and for finely
Operation and Elements of a Closed Circuit Ball Mill System Cement ball mills typically have two grinding chambers The first chamber is filled with larger diameter grinding media and lined with lifting liners The first chamber coarse-grinds the feed material and prepares it for the second chamber The second chamber is the fine grinding chamber
Mar 08 2013· calculation of ball mill grinding efficiency dear experts please tell me how to calculate the grinding efficiency of a closed ckt open ckt ball mill in literatures it is written that the grinding efficiency of ball mill is very less less than 10 please expalin in a n excel sheet to calcualte the same thanks sidhant reply
Wet Ball Mill Power Draw Bond Correction for wet open circuit since it requires more power than wet closed circuit Based on the sieve size used to determine the work index and the percentage of the product passing this size Calculate the optimum power consumption to operate the mill Solution P↓M M↓B = 15 6Φ↓C 1 0 937
Ball Mill We bring forth a highly advanced Ball Mill specifically engineered for both wet as well as dry cement grinding applications Classified depending on the circuit design bearing grinding type and drive the selection is made on the basis of the product fineness quality and nature of raw material site conditions and specific requirements
Apr 23 2018· An industrial ball mill operating in closed circuit with hydrocyclones was studied by five sampling surveys Lagrange approach was used for calculation The power consumption of ball
mill used i e ball mill or vertical roller mill Typically the motor of the ball mill consumes about 14 - 15 kWh ton of raw mix whereas the VRM motor uses 7 - 8 kWh ton On an overall basis VRM consumes about 20 lower specific energy than conventional closed circuit ball mills and is being widely used for raw material and coal grinding
A typical comparison of three competing technologies is given in Table 1 demonstrating that an efficient ball mill third-generation separator CKP ball mill third-generation separator and vertical mill on a typical 4000Blaine limestone cement show little overall difference in energy consumption
Energy-Efficient Technologies in Cement Grinding Specific energy consumption kWh t Ball mill closed circuit Ecs calculation Horomill motor power 2 126 kW is the average operating mill motor power reading from the control room during the sampling survey and used in the calculation Total fresh feed tonnage is the dry tonnage
Operation and Elements of a Closed Circuit Ball Mill System Cement ball mills typically have two grinding chambers The first chamber is filled with larger diameter grinding media and lined with lifting liners The first chamber coarse-grinds the feed material and prepares it for the second chamber The second chamber is the fine grinding chamber
Bond Rod Mill Grindability Test The test determines the Bond Rod Mill Work Index which is used with Bond s Third Theory of Comminution to calculate net power requirements when sizing ball mills Various correction factors may have to be applied The test is a closed-circuit dry grindability test performed in a standard rod mill
Ball Mill Design Power Calculation The power consumption per short ton will only be correct for the specified size reduction when grinding wet in closed circuit If the method of grinding is changed power consumption also changes as follows 1 Closed Circuit = W … Read More
If P is less than 80 passing 70 microns power consumption will be Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work
The basic parameters used in ball mill design power calculations rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index bulk density specific density desired mill tonnage capacity DTPH operating solids or pulp density feed size as F80 and maximum chunk size product size as P80 and maximum and finally the type of circuit open closed
mill used i e ball mill or vertical roller mill Typically the motor of the ball mill consumes about 14 - 15 kWh ton of raw mix whereas the VRM motor uses 7 - 8 kWh ton On an overall basis VRM consumes about 20 lower specific energy than conventional closed circuit ball mills and is being widely used for raw material and coal grinding
mill is the energy consumption The power supplied to the mill is used primarily to lift the load medium and charge Additional power is required to keep the mill rotating 8 1 3 Power drawn by ball semi-autogenous and autogenous mills A simplified picture of the mill load is shown in Figure 8 3 Ad this can be used to establish the essential
power consumption calculation for closed circuit ball mill calculate ball mill throughput in closed circuit- power consumption calculation for closed circuit ball mill Ball Mill Design Power CalculationA wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80 passing
TECHNICAL NOTES 8 GRINDING R P King Mineral Technologies ball mill power calculation Figure 85 Effect of mill filling on power draft for ball mills The data A simple equation for calculating net power draft is Austin s formula gives slightly higher values than Morrell s for mills that have length equal Power Consumption
Apr 23 2018· An industrial ball mill operating in closed circuit with hydrocyclones was studied by five sampling surveys Lagrange approach was used for calculation The power consumption of ball