In the present work, an empirical model was derived, which gives the specific grinding energy Eas a function of the cement fineness F Bl(Blaine) in cm2/g and the clinker Bond work index w i(kWh/short ton) The equation was connected with a previously proposed model giving the specific grinding energy Eas a function of the Bond work index w...

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 index of 15 and a size distribution of 80% passing ¼ inch (6350 ....

Jun 17, 2018· Mining Grinding Ball Mill/radiator Tube Mills Energy-saving Wet Type Ball Application: Ball mill is the key equipment for grinding after the crush process, and it is We are a professional manufacturer of mining equipments, such as crusher, mining mill, tube mill, rotary kiln, cooler, rotary dryer, magnetic separator, flotation...

11 Crushing and classification Estimates vary, but it is generally accepted that of all the energy used in the World something like between 1 and 10% is in comminution, ie the processes of crushing, grinding, milling, micronising, etc Changing the size of the particles by crushing creates many important industrial products...

bond-valence parameters for the equation of Brown & Altermatt (1985), for 1350 unique ion pairs, and counts 340 sets of bond-valence parameters for 194 cations bonded to...

Oct 13, 2005· This invention relates to a testing method for designing a semiautogenous or an autogenous grinding circuit with at least one ball mill The feed to autogenous and semiautogenous mills is an important variable in the performance of a grinding circuit...

Values of the work index: obtained from experiments for different materials are given in the table below Material Wi (kWh/ton) Basalt 2041 Coke 738 Limestone 116 Mica 1345 Glass 308 Calcined clay 143 Dry Grinding work index is 134 times wet grinding index Open circuit work index is 134 times closed circuit work index Questions: 1...

The guideline reviews the data required for the analysis, including hardness characterization data generated from the SMC Test® and Bond Ball Mill Test Work Index, presents the Morrell equations and their applications, and provides a worked example...

Rod mills are less common than ball mills for grinding minerals The rods used in the mill, usually a high-carbon steel, can vary in both the length and the diameter However, the smaller the rods, the larger is the total surface area and hence, the greater the grinding efficiency Autogenous mill...

You can also review the step-by-step Bond Work Index Test Procedure I posted here See this useful summary Table of Bond Work Index by Minerals , Basic Equations The basic work index equation is: , In commercial grinding mills the operating work index is found by Eq (19) However, when exposure ratios of the feed and product are obtained ....

Bonds law is often written in terms of the work index (Wi) as, Where the work index is defined as the energy required per unit mass in kWh/ton to reduce an infinitely large particles to D 80 = 100 μm...

W is the work (energy) input per ton F80 is the 80% passing size of the circuit feed, and P80 is the 80% passing size of the circuit product, in microns For example, a grinding circuit is processing 450 t/h (of dry feed) with a mill drawing 3,150 kW (at the pinion)...

GRINDING MILLS & MEDIA Trained and worked as Grinding Mill Application Engineer at Allis-Chalmers and Dominion Engineering Completed numerous projects from (rod, ball, AG/SAG and roller) mill selection, sale, and manufacture to field tuning and processing performance verification...

You need a two-stage solution, first stage open-circuit mill and then second stage closed-circuit mill First stage, will be broken into two parts as well, you use a Bond rod mill work index for the coarse component of the ore (+21 mm) and the Bond ball mill work index for the fine component (-21 mm)...

Bond Work Index Procedure and Method 2018 10 10&ensp&enspThis Grindability Test or Bond Ball Mill Work Index Procedure is used to determine the Bond Work Index of minus six mesh or finer feed ore sampl These equation application methods are used to process...

Bond Ball Mill Index - JKTech A Bond Ball Mill Work Index test may be required for the design of a new mineral The BBMWI is then used in the design calculations of the new grinding circuit...

Bond Work Index Formula-Equation 2018-11-8 See this useful summary Table of Bond Work Index by Minerals For any circuit, whether a crushing circuit, a rod mill, or a closed ball mill circuit, the Work Index always means the equivalent amount of energy to reduce one ton of ,...

Furthermore, the grinding kinetics and mass balance equations were applied to model the standard Bond rod-mill work index For comparing the standard Bond rod-mill work index and the new modeled method, work index (W i) and produced fine particles in a cycle (G i) for the four samples determined...

In Bond's equation, if L is expressed in microns, this defines E i and Bond calls this the Work Index The greatest use of these equations is in making comparisons between power requirements for various degrees of reduction EXAMPLE 111 Grinding of sugar Sugar is ground from ....