Dec 12, 2016· 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 .

Have an open when searching for this. It is definitely the most expensive and most important part in your ball mill, but if you look around enough you can surely find one for free. The motor should probably run at a least 500 rpm. Higher is fine; it'll just mean you'll need a greater reduction ratio.

Nov 25, 2010· What is reduction ratio? ... How do you calculate feed water for ball mill in iron ore? Iron ore can only be mined with a stone pickaxe, silly. Read More. Asked in Nutritional Measurement, Calorie ...

A ball mill is a type of grinder used to grind and 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.

Mills used to grind will operate with higher roll speeds 1,500 Ft/min ( M/sec) up to 3,000 Ft/min (M/sec) with roll speed differentials. Roll speed differentials simply means one roll turning faster than the other and is usually described in the form of a ratio, slow roll speed expressed as 1.

1. BALL MILL AIM: To determine the energy required for crushing the given feed and thus obtain the work index for the same. Also determine the reduction ration and critical speed of the mill. THEORY: The ball mill is classified as an intermediate and fine grinder where .

SemiAutogenous Grinding (SAG) Mill. Wet or dry. Higher capacity than AG mill grinding. Primary, coarse grinding (up to 400 mm feed size) Grinding media is grinding feed plus 412% ball charge (ball 125 mm) High capacity (short retention time) Less sensitive to feed composition (critical size material)

If you need to amplify the motor torque with a factor of 3 then you need a gear reducer with a gear ratio. In order to calculate the gear ratio of the two meshed gears we need to know either: the number of teeth of both input and output gears. the base diameter or radius of both input and output gears.

With most ball mill designs, you have two areas of speed reduction to tweak: from the motor drive shaft to the drive pulley and from the roller bar to the milling jar. The drive train calculator featured on .

Jan 10, 2019· how to calculate ball mill reduction ratio. ZLY224 16 double stage cylindrical reduction ball mill gearbox gear. Zly224 16 Double Stage Cylindrical Reduction Ball Mill Gearbox Gear and nominal drive ratio, which guarantee good interconnection between key parts and. Get Price X(s)m 25l,50l,80l,11l,160l,250liter Rubber Internal ...

Normally the amount of balls should be 5055% of the apparent volume of the mill, as in a normal ballspacking we have about 40% of empty space between them, this means that we will have 30% of ...

May 04, 2008· I'm trying to build a ball mill and I need to figure out the rpm to calculate the reduction ratio. Thanks! show more Hi all, I took an electric motor out of an old printer that I had, but it has no markings on it that would refer to the speed of the motor or the voltage.

Feb 25, 2015· Crushing of coal and calculation of size reduction efficiency. 26. Size reduction equipment Duty Feed Size Product Size Coarse Up to 1 m3 100150 mm Medium Upto 150 mm 3575mm Light Upto 100 mm 2550mm Fines 25 mm 150 micron Ultra fines 1 mm 74 micron Coarse and medium duty crushers are generally used as Primary Crushers,...

They used a small homemade ball mill composed of a stainless steel container with a diameter and height of 8 and 12 cm, respectively, and 400 small stainless steel .

Size Reduction Milling From lab/pilot to production requirements, Hosokawa Micron Powder Systems offers a complete line of size reduction technologies. Whether you call it size reduction, micronization, milling, pulverizing, jet milling, air milling, or simply grinding, we can help.

Note that the critical speed of the mill is calculated as follows: Critical speed (in rpm) = /sqrt(D d) with D the diameter of the mill in meters and d the diameter of the largest grinding ball you will use for experiment (also expressed in meters) Then again, a cataracting motion produces a coarser grind.

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