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optimum ball sie in ball mill

Calculate and Select Ball Mill Ball Size for Optimum Grinding

02/08/2013  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.

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THE OPTIMAL BALL DIAMETER IN A MILL

2010; 2011). For each grain size there is an optimal ball size (Trumic et. al., 2007). The bigger ball in relation to the optimal one will have an excess energy, and consequently, the smaller ball mill has less energy necessary for grinding. In both cases, the specific power consumption increases and the grinding capacity decreases (Concha et al. 1992; Katubilwa and Moys, 2009; Erdem and Ergun ...

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THE MODEL FOR OPTIMAL CHARGE IN THE BALL MILL

determination of optimal ball size distribution as a function of size distribution of mono-mineral raw material (quartz). Investigations have been performed in laboratory ball mill with the following characteristics: Mill diameter D = 158 mm; Mill length L = 198 mm; Relative mill revolution rate Ψ = 0.85nk; Ball mill filling coefficient ϕ = 0.40; Internal surface of ball mill shell - ribbed ...

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(PDF) Optimum choice of the make-up ball sizes for

of the make-up ball sizes in tumbling ball mills. It was found that the optimum composition depends on var-ious factors, including the feed size, the product size, the mill diameter and the ...

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Ball Mills - an overview ScienceDirect Topics

where D m is the mill diameter in meters. The optimum rotational speed is usually set at 65%–80% of the critical speed. These data are approximate and may not be valid for metal particles that tend to agglomerate by welding. The minimal magnitude of the ball size is calculated in millimeters from the equation: d b. min = 10 d b. max σ 2 0.128 E ρ b D 3. where d b.max is the maximum size of ...

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THE MODEL FOR OPTIMAL CHARGE IN THE BALL MILL

determination of optimal ball size distribution as a function of size distribution of mono-mineral raw material (quartz). Investigations have been performed in laboratory ball mill with the following characteristics: Mill diameter D = 158 mm; Mill length L = 198 mm; Relative mill revolution rate Ψ = 0.85nk; Ball mill filling coefficient ϕ = 0.40; Internal surface of ball mill shell - ribbed ...

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Ball Mill Ball Size Calculation - praha-dermatologie

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. Contact . Bond formula for the grinding balls size calculation. Oct 19, 2017 Bond ...

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Table 6 from The optimal ball diameter in a mill ...

This paper covers theoretical and experimental explorations for the sake of determining the optimal ball charge in mills. In the first part of the paper, on the basis of the theoretical analysis of the energy-geometric correlations, which are being established during the grain comminution by ball impact, as well as on the basis of the experiment carried out on grinding quartz and copper ore in ...

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SAG Mill Ball Size Evaluator Evaluation Factors ...

10/09/2017  SAG Ball consumption is “average” at 400 g/t while Ball Mill grinding media (3″ balls) usage in 550 g/t. Yet, you add steel and nothing seems to happen, tonnage is not noticeably improved. You need more tonnage and could actually use a larger/coarser transfer size from the SAG to Ball Mill. The ore is “hard” and “bulky”.

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Effect Of Ball Size In A Ball Mill, Ball Mill

Sag Mill Ball Size Evaluator Evaluation Factors. Lets calculateselectpick a new ball for your sag mill now lets suppose you have a sag mill and ball mill that are not drawing full kw power the sag mill has a small circulation load of oversize given be the 38 trommel screen and the 12 x 1 14 discharge grates the load of 4 balls in this sag is good but unmeasured sag ball consumption is average ...

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AMIT 135: Lesson 7 Ball Mills Circuits – Mining Mill ...

Ball Size as Initial Charge. Commercial ball sizes 10 – 150 mm; Number, size and mass of each ball size depends on mill load and whether or not the media is being added as the initial charge. For the initial chargin of a mill, Coghill and DeVaney (1937) defined the ball size as a function of the top size of the feed, i.e., d↓V = 0.40 ...

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Ball Mill - an overview ScienceDirect Topics

Ball mills give a controlled final grind and produce flotation feed of a uniform size. Ball mills tumble iron or steel balls with the ore. The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds. The feed to ball mills (dry basis) is typically 75 vol.-% ore and 25% steel. The ball mill is operated in closed circuit with a particle-size measurement ...

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Identification of Optimal Mill Operating Parameters during ...

the prediction of the optimum ball filling volume. The proposed procedure can be also applied for the identification of optimal mill operating parameters for other minerals. Keywords: comminution, breakage rate, ball filling, kinetic models, simulation 1. Introduction Size

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Ball mill - Wikipedia

A ball mill is a type of grinder used to grind or blend materials for use in mineral dressing processes, paints, pyrotechnics, ceramics, and selective laser sintering. It works on the principle of impact and attrition: size reduction is done by impact as the balls drop from near the top of the shell. A ball mill consists of a hollow cylindrical shell rotating about its axis. The axis of the ...

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Minerals Free Full-Text Effects of Ball Size on the ...

While the particle size is known to generally increase with an increasing ball size, in 2013, Shin et al. showed that particle size decreased and then increased as the ball size increased from 1 to 10 mm during the comminution of Al 2 O 3 powder at low rotation speeds (50–153 rpm) . The optimum ball size is dependent on the milling conditions and the properties of the mineral. Thus, to ...

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Ball mill media optimization - Metcom Tech

optimum ball diameter” (Taggart, 1945). • Test mills used for media sizing investigations need to be reasonably large (at least 0.4 m in diameter was suggested), depending on size of balls and ore being tested. • Ball surface wear rate is approximately constant, but with variations due to hardness, and other factors. Consumption is closely related to total ball charge surface area. • A ...

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Figure 2 from The optimal ball diameter in a mill ...

Fig. 2. Dependence of milling rate constant k while grinding particular size fractions of copper ore upon ball diameter db in the charge - "The optimal ball diameter in a mill"

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Table 6 from The optimal ball diameter in a mill ...

This paper covers theoretical and experimental explorations for the sake of determining the optimal ball charge in mills. In the first part of the paper, on the basis of the theoretical analysis of the energy-geometric correlations, which are being established during the grain comminution by ball impact, as well as on the basis of the experiment carried out on grinding quartz and copper ore in ...

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AMIT 135: Lesson 7 Ball Mills Circuits – Mining Mill ...

Ball Size as Initial Charge. Commercial ball sizes 10 – 150 mm; Number, size and mass of each ball size depends on mill load and whether or not the media is being added as the initial charge. For the initial chargin of a mill, Coghill and DeVaney (1937) defined the ball size as a function of the top size of the feed, i.e., d↓V = 0.40 ...

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Optimization of the make-up ball charge in a grinding

Ball size distribution is commonly used to optimise and control the quality of the mill product. A simulation model combining milling circuit and ball size distribution was used to determine the ...

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Effect of ball and feed particle size distribution on the ...

It was also observed from the experimental results that in order to increase the milling efficiency of a ball mill, towards optimum production of material in the desired size class, there is a need to correlate the ball size and the feed size distributions. Original language: English: Pages (from-to) 79-84: Number of pages: 6: Journal: South African Journal of Chemical Engineering: Volume: 25 ...

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Ball Mill Ball Size Calculation - praha-dermatologie

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. Contact . Bond formula for the grinding balls size calculation. Oct 19, 2017 Bond ...

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Identification of Optimal Mill Operating Parameters during ...

the prediction of the optimum ball filling volume. The proposed procedure can be also applied for the identification of optimal mill operating parameters for other minerals. Keywords: comminution, breakage rate, ball filling, kinetic models, simulation 1. Introduction Size

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Minerals Free Full-Text Effects of Ball Size on the ...

While the particle size is known to generally increase with an increasing ball size, in 2013, Shin et al. showed that particle size decreased and then increased as the ball size increased from 1 to 10 mm during the comminution of Al 2 O 3 powder at low rotation speeds (50–153 rpm) . The optimum ball size is dependent on the milling conditions and the properties of the mineral. Thus, to ...

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Grinding in Ball Mills: Modeling and Process Control

Grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical, mechanical and chemical characteristics. Typical examples are the various ores, minerals, limestone, etc. The applications of ball mills are ubiquitous in mineral processing and mining industry, metallurgy, cement production ...

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