kwh t ball mill

A Review of Advanced Ball Mill Modelling ... unit mass of powder or ore in batch mills. Given typically in kWh/t, it has long been recognized as the most import - ant descriptor of the contribution of the process to the outcome of comminution. The importance of specific en-

equipment to use to calculate KWh/t. What pieces of equipment should i use to calculate KWh/t. My grinding system has a roll press, ball mill and separator. Should i used: 1. Just the ball mill, roll press, separator, separator fan and ball mill fan. 2. All in 1 above including elevators. 3. include everything in the system.

AGITATED BALL MILL ANR-CL GCC fillers and coating pigments from ANR-CL-CL grinding systems 60% < 2 µm 45 kWh/t 90% < 2 µm 105 kWh/t 98% < 2 µm 180 kWh/t Slurry concentration 70 - 78 Weight% Viscosity 150 - 300 mPas Feed size 99,9 % < 45 µm The ANR-CL is designed for the cost-efficient ultrafine grinding of highly concentrated

Wm = Wi ( 80P 10 - 80F 10 ) (1) where: Wm - is mill specific motor output power (kWh/t), Wi - is the Bond ball mill work index (kWh/t), P80 - is sieve size passing 80% of the mill product (µm), F80 - is sieve size passing 80% of the mill feed (µm), The "efficiency factors" (Rowland, 1975) modify equation 1 so that it caters for circuit ...

BM = Ball mill specific energy from T 80 1.7 mm to final product P 80, using Bond's Law, (kWh/t) W T = Total grinding mill circuit specific energy (kWh/t) Note that K BM is the composite of EF3, EF4 and EF5 factors for ball milling (Rowland, 1982). Morrell and SMCC Morrell (2004) developed a methodology for predicting specific energy with

ball mills drawing about 14 MW (assumed DCS, works out to 13.0 MW at mill shell) E ball = 13000 kW / 1100 t/h = 11.82 kWh/t (at shell) circuit P 80 ranged from 92 to 128 µm (use 100 µm)

13.06 kWh/t 10.2 kWh/t 16.6 kWh/t None of the above No, the answer is incorrect. Score: 0 Accepted Answers: ... In ball mill fine product can be obtained with Longer residence time Large size balls Both of the above None of the above No, the answer is incorrect. Score: 0 …

Ball mill work index kWh/t 19.4 (avg.) 17.33 20.9 (design) BACKGROUND The 40 ft SAG mill was supplied with a traditional bi-directional OEM lining system manufactured from chrome molybdenum steel with a total of 412 liners per set and a total liner mass of 773,931 kg. All the liners were designed

The evaluation of breakage tests and survey data revealed the following; the Bond work index obtained for the current ore ranges between 17.20 - 18.70 kWh/t compared to 14.50 - …

Ball Mill Operation & Ball Mills Audits. Name : Shailesh Katare UE No : 1000814 Date : 13.10.2017 Time : 02.30 pm to 05.30 pm Venue : Kiln CCR Conference hall Content • "A" level cement mill audit What is an "A" Level Audit? Targets of the "A" level audit • "B" level cement mill audit What is a "B" Level Audit? Targets of a "B" Level Audit Requirements for the "B ...

BALL MILL Specification Number A Process Data Sheet xxxx-xxx-xxx Sheet No : 1 of 2 Area: xxx Client : Operating Centre: Jakarta No. 1 Working 1 Service: ROM Ball Mill Item No: 1 of: Standby 0 xxxx-ML-001 2 Manufacturer: Model Type and Number: 3 OPERATING CONDITIONS 4 MATERIAL HANDLED: Crushed Ore 5 Hazard Considerations: Yes X No Type: 6 DESIGN …

SAGDesign testing provides SAG pinion energy grindability in kWh/t to within +/- 5% from 152 to 1.7 mm, and Bond Ball Mill Work Index on SAG ground ore, from the SAG test on the same sample. Starkey & Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client's own ore samples.

AG/SAG/Ball Mill Sizing Gross Power Draw and Specific Energy Calculator for Autogenous Grinding (AG), Semi-Autogenous Grinding (SAG) and Ball Mills. Exit Mill Calculator ... [kWh/t] Required when F 80 (feed size) is larger than transfer size. Milling Circuit Arrangement. P xx Passing size control [%] ...

Wet Ball Mill = kg kWh = 0.16(A i-0.015) 0.33; Dry Ball Mill = kg / kWh = 0.023A i 0.5; Replacement Ball Size. Rowland and Kjos proposed the use of their equation for the determination of the initial and replacement media size. Azzaroni (1981) and Dunn (1989) recommended the use of the following expression for the size of the makeup media:

3.3 Ball Mill Design The ball mill designs also follow the Bond/Rowlings method with comparison with other methods. Again the method of use is the same 3.4 SAG/BM Combined design This is the combined model of the SAG and BM models. The difference is that a provision in the BM model allows for the fact that finished product is in the BM feed.

600,000 t/y Slag Grinding Plant Model No.: GRMS46.41 Slag Powder Vertical Roller Mill Electricity Consumption: 40 kWh/t Standard Production Rate: 105 t/h Effective Diameter of Spinning Plate: 4600 mm 300,000 t/y Slag Grinding Plant Model Number: GRMS33.31 Slag Powder Vertical Roller Mill Electricity Consumption: 43 kWh/t Standard Production ...

Test WI of circuit feed ore = 16.1 kWh/t (The Bond ball mill test Work Index of the ore, whichapplies over the size reduction range of this circuit) W = 3,150 kW / 450 t/h = 7.0 kWh/t . The circuit's Bond WI Ratio Eff. = 16.1 / 14.4 = 1.12, or 112% . This circuit is performing approximately 12% better than predicted

Wc Specific energy for conventional crushing (kWh/t) Wh Specific energy for HPGRs (kWh/t) Wi Bond Work Index Ws Specific energy correction for size distribution (kWh/t) WiBM Bond Ball Mill Test Work Index (kWh/t) 3. KEYWORDS Autogenous Grinding (AG), Ball mill, Bond Work Index (Wi), Comminution circuit, High Pressure Grinding Rolls (HPGRs), Rod ...

Ball mills, that are commonly used for finish grinding, have high energy demands, consuming up to 30-42 kWh/t clinker depending on the fineness of the cement. Complete replacement of ball mills by vertical roller mills (VRMs) with an integral separator – as opposed to the use of VRMs as pre-grinding to ball mills – is regarded as a breakthrough.

iis the Bond ball mill work index (kWh/t), F80 is the feed 80 pct passing size (lm), and P80 is the product 80 pct passing size (lm). It can be seen that in the regime in which the Bond equation is valid, energy use increases exponentially as product size decreases with constant feed size, with an exponent of (approximately) 0.5.

F80) in a SAG mill will require 29.5 kWh/t in the SAG mill. When ball mill grinding is added, an additional 12.3 kWh/t is needed to grind to a P80 of 74 microns to feed the process. 0 10 20 30 40 50 60 70 80 90 100 8 10 12 14 16 18 20 …

Third, in the typical ball mill, because coarse particles have a longer retention time, they have more "specific energy (kWh/t) applied to them" than do smaller particles, the study said. This means that "if a coarse particle is retained in the mill for a longer period of time, it is exposed to a larger amount of energy," Bartholomew said.

The measured BW i was 14.0 and 6.6 kWh/t for the medium/hard and soft ore, respectively, at a closing screen size of 106 μm compared with the simulated values of 13.2 and 5.6 kWh/t. The ability to simulate the Bond work index test also allows examination of truncated ball mill feed size distributions on the work index.

Tag Archives: vrm vs ball mill kwh/t - Ball Mill Grinding ... prinsip kerja ... Report on Mill Comminution Testing - Orezone 25 Feb 2013 ... Table 3 – Derived Values for A*b and t10 at 1 kWh / t . ..... x Conventional reciprocating crushers, eg jaw, gyratory and cone x HPGRs.

seen, the vertical mill consistently presented lower net specific energy consumption than the ball mills which operate on the same circuit. The averages were 11.3, 11.7 and 6.5 kWh/t respectively for ball mill 01, ball mill 02 and vertical mill. Figure 5 – Net specific energy consumption of regrinding circuit.

Disadvantages are the energy consumption in kWh/t of around 30-40 kWh/t for clinker, is typically louder than other comminution machines and may require longer downtime periods for maintenance. 4 Ball mills come in two compartments with ball charge size of around 50mm-90mm for grinding the coarser material and the second compartment containing ...

(kWh/t) and WioACTis the Actual Operating Bond Work Index (kWh/t). • If the Wi Efficiency Ratio is 1.0 or , the circuit is per-forming with the same efficiency as the Bond Standard Circuit (and the ore Wi = circuit operating Wi), in accor-dance with the correlation that Bond (1962) established between plant operating data and test data ...

vertical ball mill slakers eliminate grit disposal problems When lime or water quality is poor and/or when lime consumption rates are high, STT designs slaking systems utilizing a vertical ball mill. The total grinding process of a vertical ball mill utilizes all residual reaction value, virtually eliminates grit disposal problems, and ...

12%As fine grinding is typically used on regrind applications, the feed tonnages to fine grinding circuits are small compared to head tonnages, typically 10 to 30 tph. However, the specific energies are often much larger than those encountered in intermediate milling and can be as high as 60 kWh/t.

The dry feed of a ball mill circuit is 300 t/h. The power at the pinion of the ball mill is 1800 kW. F80 = 80% passing size of the circuit feed, in microns = 2500 um P80 = 80% passing size of the circuit product, in microns = 225 um Solution Work Input (Energy input): W= (1800 kw)/ 300 t/h=6.0 kwh/t Then WI = Work Index of this circuit