# calculation of specific power consumption of ball mill with roller press

### PDF Performance Evaluation of Vertical Roller Mill in

Total energy consumption of the conventional ball mill circuit is higher than vertical roller mill system in spite of the coarser feed of ball mill circuit.

Get Price### Wet Grid Ball Mill

Wet Grid ball mill is mainly used for mixing and grinding materials in two types dry grinding and wet grinding has advantages of fineness uniformity and power saving The machine uses different types of liner to meet different customer needs The grinding fineness of material can be

Get Price### PEER REVIEWED ARTICLE bioresources

energy consumption however there was no theoretical calculation of its productivity and the forming pressure was considered to be constant in the power consumption analysis Although Ståhl and Berghel 2011 studied the energy consumption of a pilot scale production of wood fuel pellets the testing object was a flat die machine.

Get Price### Work Index Determination for High Pressure Grinding Rolls

the specific energy consumed in the test to the breakage achieved such that the index can be used to predict comminution energy requirements The measurements were calibrated against laboratory scale HPGR equipment to develop a model for design and forecasting that includes crushers HPGRs and ball mills in a complete comminution circuit.

Get Price### PDF Methodology for Calculation of Rolling Load and

Vol.2 Issue.1 INTERNATIONAL JOURNAL OF RESEARCH IN AERONAUTICAL AND MECHANICAL ENGINEERING January 2014 Pgs 27 34 ISSN ONLINE INTERNATIONAL JOURNAL OF RESEARCH IN AERONAUTICAL AND MECHANICAL ENGINEERING Methodology for Calculation of Rolling Load and Forces Acting On Herringbone Gear Using Hot Rolling Theory.

Get Price### Hydraulic Roller Press Flexible capacity Low energy

a conventional ball mill circuit The result an increase in production of approximately 25 percent and a reduction in specific power consumption of about 10 percent compared to a conventional ball mill system Semi finish grinding Upgrading a ball mill system with an HRP in a semi finish mode is a simple solution and installation is easy.

Get Price### Vertical Mill Calculations PDF Mill Grinding Nozzle

Roller grinding force Specific grinding pressure kN kN kN/m2 MR M N Roller assembly weight one roller Torque factor Mill power uptake kg 1 kW n Phyd v Grinding table speed Hydraulic grinding pressure Grinding track speed rpm Bar m/s Wroller Z Roller width Number of rollers m Vertical mill calculations Power consumption

Get Price### An energy based comparison of vertical roller mills and

The mill power draw is measured by a torque rod situated in line with the main drive shaft The specific power consumption ΔeVRM200 in J/kg could be calculated by the control system according to Eq Details of the VRM600 in the CEMTEC laboratory are published in

Get Price### Ball Mill Design/Power Calculation

The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution The following shows how the size or select the matching mill required to draw this power is calculated from known tables the old fashion way .

Get Price### Vertical roller mills The new leader in grinding technology

Consequently efficiency in energy used can be as much as 40 45 less than a wet ball mill circuitnoticed with all power going into the comminution of the ore Smarter process control ensures consistent grinding to the correct size whilst the mill is in operation.

Get Price### Vertical Mill Calculations PDF Mill Grinding Nozzle

Roller grinding force Specific grinding pressure kN kN kN/m2 MR M N Roller assembly weight one roller Torque factor Mill power uptake kg 1 kW n Phyd v Grinding table speed Hydraulic grinding pressure Grinding track speed rpm Bar m/s Wroller Z Roller width Number of rollers m Vertical mill calculations Power consumption

Get Price### Calculate and Select Ball Mill Ball Size for Optimum Grinding

To accelerate the math or calculation you can use the shortened formula D m <= Km d 0.5where Km =6 log dk is taken from Figure 5 according to the fineness of the finished product dk These formulas are applicable to the case of feeding a mill with only single sized balls and not a mixture without consideration for ball wear.

Get Price### IMPROVING THERMAL AND ELECTRIC ENERGY

2.5.2 Replacing a Ball Mill with a Vertical Roller Mill High Pressure Grinding Rolls 2.5.4 High Pressure Roller Press as a Pre grinding Step for Ball Mills . 31 2.5.5 Improved Specific Thermal Energy Consumption by Rotary Kiln Type . 4 Table 2 Production Gains

Get Price### Cement mills and raw mills for high throughput rates

The thermal energy of process gases can be used on Pfeiffer roller mills Favorable control behavior High drying capacity short dwell time of the material to be ground and remote control of grinding pressure and classifier rotor speed ensure a fully automatic operation of the MVR mill

Get Price### Vertical Mill Calculations Mill Grinding Nozzle

Vertical Mill Vertical Mill Layout Alternatives Vertical mill calculations Symbols Power consumption Grinding pressure Mill internals Nozzle ring Dam ring Heat balances Example Layout Alternatives There are two basic layouts of the VRM system product collection in cyclone s or product collection in filter Product collection in cyclone s Product collection in filter

Get Price### Advanced process control for the cement industry

Ball mill application Ball mill grinding is a highly energy consuming process and the ECS/ProcessExpert Ball mill application is built to meet the increasing demand for maximum production with minimum power consumption while minimizing variations in quality Benefits 3Up to 6 increase in production Up to 4 reduction in ball mill specific

Get Price### Formulas kilnSlideShare

Rotary Kiln power input calculation W x bd x td x N x F x 0 1 H.P = rd W = Total vertical load on all roller shaft bearing lb bd = roller shaft bearing diameter inches Note This is Frictional rd = roller diameter inches 1 Horse Power td = tire or riding rind diameter inches N = rpm of Kiln shell P = Coefficient or friction of

Get Price### Formulas kilnSlideShare

Rotary Kiln power input calculation W x bd x td x N x F x 0 1 H.P = rd W = Total vertical load on all roller shaft bearing lb bd = roller shaft bearing diameter inches Note This is Frictional rd = roller diameter inches 1 Horse Power td = tire or riding rind diameter inches N = rpm of Kiln shell P = Coefficient or friction of

Get Price### Best energy consumptionInternational Cement Review

From this approach the roller press CKP pre grind vertical rollers and Horomill all developed Raw milling The gas swept vertical mill quickly became the raw mill of choice Grinding energy was approximately 50 per cent of the ball mill and the drying capabilities allowed direct processing of materials of up to 20 per cent moisture content.

Get Price### AMIT 135 Lesson 6 Grinding CircuitMining Mill

Scale up criterion is the net specific power consumption i.e the power consumed by the mill rotor itself minus all mechanical and electrical losses divided by the feed rate of solids For the full scale mill specific power is multiplied by the feed rate to get the net mill power.

Get Price### Energy Use of Fine Grinding in Mineral Processing

Energy Use in Comminution Grinding activities in general including coarse intermediate and fine grinding account for 0.5 pct of U.S primary energy use 3.8 pct of total U.S electricity consumption and 40 pct of total U.S mining industry energy use Large energy saving opportunities have been identified in grinding in particular.

Get Price### Technological and nutritional aspects of milk chocolate

The grinding process was performed in a ball mill IMPACTOR IMP5 Lipp Mannheim Germany with 15 kg of hardened steel balls of either 6.35 mm diameter with the frequency converter set to 25 Hz Power consumption of the mill was kept at 2.5 ± 0.2 kW by frequently adding lecithin and thus controlling mass consistency.

Get Price### Cement grinding Vertical roller mills versus ball mills

grinding of raw materials The grinding efficiency of the vertical roller mill combined with an ability to dry grind and classify within a single unit gives the vertical roller mill a decided advantage over a ball mill system However despite these benefits applications of the vertical roller mill for cement grinding are less prevalent.

Get Price### Technological and nutritional aspects of milk chocolate

The grinding process was performed in a ball mill IMPACTOR IMP5 Lipp Mannheim Germany with 15 kg of hardened steel balls of either 6.35 mm diameter with the frequency converter set to 25 Hz Power consumption of the mill was kept at 2.5 ± 0.2 kW by frequently adding lecithin and thus controlling mass consistency.

Get Price### How Can I calculate new ball size and weight desing for

4.See the availability of roller press in comparision with the mill 3.If the performance of roller press will be too good the u can run the mill only 24 26 loading with a very good out put and low specific energy 4.Tonnage of grinding media u can calculate on the basis of dia.length and the filling degree of mill Thanks Pankaj Reply

Get Price### KHD Roller Press April 2012KHD International

time during roller changes The doors in the roll cover permit rapid and wide access to the rollers for inspec tion and maintenance Drive of a Roller Press for grinding granulatet slag A driving force reasonably stressed The drive power is transferred to the grinding rollers via multi stage planetary gearboxes with first stage spur gears.

Get Price### Grinding trends in the cement industryCement Lime

Summary The main trends concerning grinding processes in the cement industry are still higher efficiency reduction of the power consumption and system simplicity In the case of new orders vertical mills have increased their share to over 60 and ball mills have fallen to less than 30 It is somewhat surprising that the number of different grinding processes and mill types used by the

Get Price### An energy based comparison of vertical roller mills and

View on the grinding table feed tube and the two conically shaped rollers adjustable in distance to the table The mill power draw is measured by a torque rod situated in line with the main drive shaft The specific power consumption ΔeVRM200 in J/kg could be calculated by the control system according to Eq 3 .

Get Price### Cement SectorBureau of Energy Efficiency

4.3.4.2 Calculation for Gate to Gate Specific Energy Consumption SEC 6 4.4 Methodology Summary 7 5 Target Setting in Cement Plants 7 5.1 Grouping of Cement plants 7 5.2 Energy Consumption Range 8 5.3 Example Normalised Baseline parameters and Target for PPC 8 5.4 Apportionment of Sub Sector Target of Energy Saving in Cement Sector 9

Get Price### Ball Millan overview ScienceDirect Topics

It is possible to make an approximate calculation of the capacity of a ball mill by means of the equation N = 0.104 D 3 L ρ b.ap ϕ 0.88 0.1 L n 1 η 1 η 2

Get Price### Energy Efficiency Improvement Opportunities for the

Energy management and process control Long dry kiln upgrade to preheater/precalciner kiln High pressure roller press Older dry kiln upgrade to multi stage preheater kiln High efficiency classifiers Convert to reciprocating grate cooler Improved grinding media ball mills Kiln combustion system improvements General Measures Indirect Firing

Get Price### A Comparison of Three Types of Coal Babcock Power

This paper presents a comparison of the Riley Vertical Roller Mill with Riley s two other pulverizer designs a low speed ball tube mill and a high speed attrition pulverizer Specific topics include throughput capability fuel type availability reliability power consumption product fineness coal drying capability feed size re

Get Price### Calculate and Select Ball Mill Ball Size for Optimum Grinding

In Grinding selecting calculate the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do Often the ball used in ball mills is oversize just in case Well this safety factor can cost you much in recovery and/or mill liner wear and tear.

Get Price### Ball Millsan overview ScienceDirect Topics

They have lower specific energy consumption than ball mills and the separator as in raw mills is integral with the mill body In the Loesche mill Fig 2.23 16 two pairs of rollers are used In each pair the first smaller diameter roller stabilises the bed prior to grinding which takes place under the larger roller.

Get Price### The Calculation of Roll Force and Torque in Hot Rolling Mills

Abstract Equations are derived for the normal roll pressure specific roll load and torque in hot rolling mills using the condition for plastic deformation in rolling derived by Orowan together with von Kármán s equation of equilibrium Although applying strictly to the rolling of ideal plastic rigid materials these equations may be

Get Price### ROLLER PRESSES Finish grinding by Roller Press

Finish grinding by Roller Press Specific power consumptionat meters for RP separator and separator fan kWh/t raw meal 35.8 34.86 the capacity of a f4.4m ball mill with the installation of a Comflex system The raw material is fed to the Comflex system and

Get Price### Vertical Roller MillsFL

When it comes to grinding raw coal savings in specific energy consumption can be achieved with vertical roller mills Specific energy consumption depends on the grindability of the raw coal and the coal meal fineness required A dynamic separator that ensures high separation efficiency also helps to reduce specific energy use.

Get Price