mining ball mill, CE approval/ Molino de bolas

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Description

 mining ball mill, CE approval/ Molino de bolas

 

♦ Ball mill introduction/ molino de bolas

ball mill is a cylindrical device used to grind (or mix) materials like ores,chemicals, ceramic raw materials and paints. Ball mill rotate around ahorizontal axis, partially filled with the material to be ground plusthe grinding medium. Different materials are used for media, includingceramic balls, flint pebbles and stainless steel balls

 

♦ Ball mill working pricinple, molino de bolas:

Ball mill,a kind of horizontal drum-type rotating device, is a grate mill with external gear and double bins. Materials shall be evenly charged through quill shaft in feeding device into the first bin, which hasstep or waved lining with steel balls in different specifications.Steel balls are taken to a certain height by centrifugal force from drum rotation and then fall. Thus it will give a heavy blow to materials, playing a role of grinding. Materials after crushed in thefirst bin shall enter bin across single-layer diaphragm into the second, which is provided with flat lining with steel balls, to go through further grinding. Powder shall be discharged from discharging grating, ending the milling process.

Molino de bolas  es una herramienta eficiente para la pulverización de muchos materiales en polvo fino. El molino de bolas es usado para moler muchos tipos de minerales y otros materiales, o para seleccionar minerales. Es ampliamente usado para materiales de construcción, industria química, etc. El Molino de bolas es un equipo clave para la repulverización. Es ampliamente usado para cemento, productos de silicato, nuevos tipos de materiales de construcción, materiales a prueba de fuego, fertilizantes químicos, metales negros y no ferrosos, vidrio, cerámicas, entre otros. Nuestro molino de bolas puede moler minerales u otros materiales que pueden ser molidos tanto por proceso húmedo como por proceso seco.

 Dynamic picture of  mining ball mill:

♦ Hengxing Ball mill structure & feature, molino de bolas:

A Ball mill molino de bolas is mainly composed of charging and discharging, cyclone and rotation parts (like redactor, minor rotation gear, motor, electric machine, etc). Hollow axis is made of steel parts with a lining replacable. Major rotation gear, machined by rollingwheel of casting, is lined with wearing plate with fine wear-resisting property

This ball mill machine runs stably and reliably. Based on difference of materials and discharging types, dry Ball mill and wet Ball mill are available. 

 

 

working site of the mining ball mill :

 

♦ Technical datas of Hengxing Ball Mill, molino de bolas:

Model	Rotary speed(r/min)	Ball load(t)	Feeding size(mm)	Discharging size(mm)	Capacity (t/h)	Motor power(kw)	Weight(t)
Ø900*1800	36-38	1.5	<=20	0.075-0.89	0.65-2	18.5	4.6
Ø900*3000	36	2.7	<=20	0.075-0.89	1.1-3.5	22	5.6
Ø1200*2400	36	3	<=25	0.075-0.6	1.5-4.8	30	12
Ø1200*4500	32.4	5	<=25	0.074-0.4	1.6-5.8	55	13.8
Ø1500*3000	29.7	7.5	<=25	0.074-0.4	2-5	75	15.6
Ø1500*4500	27	11	<=25	0.074-0.4	3-6	110	21
Ø1830*3000	25.4	11	<=25	0.074-0.4	4-10	130	28
Ø1830*4500	25.4	15	<=25	0.074-0.4	4.5-12	155	32
Ø2100*7000	23.7	26	<=25	0.074-04	8-48	280	50
Ø2200*4500	21.5	27	<=25	0.074-0.4	9-45	280	48.5
Ø2200*7500	21.7	35	<=25	0.074-0.4	15-30	380	56
Ø2400*3000	21	23	<=25	0.074-0.4	7-50	245	54
Ø2400*4500	21	30	<=25	0.074-0.4	8.5-60	320	65
Ø3200*4500	18	65	<=25	0.074-0.4	-----	800	137

 

♦ Cast Ball mill molino de bolas, grinding media content:

Item	C	Cr	Si	Mn	S	P	Cu	Mo	Hardness
Low Chrome	1.8-3.5	1-3.5	≤1.2	≤1.5	≤0.15	≤0.15	≤0.5	≤1.0	≥45
Medium Chrome	1.8-3.3	4-9	≤1.2	≤1.8	≤0.15	≤0.15	≤1.0	≤1.5	≥50
High Chrome	1.6-3.3	10-15	≤1.0	≤2.5	≤0.10	≤0.10	≤1.5	≤1.0	≥55
Higher Chrome	1.6-3.3	15-18 18-27	≤1.0	≤2.5	≤0.10	≤0.10	≤1.5	<2.0	≥60

 

Detailed images of the ball mill parts : 

♦ Ball mill, molino de bolas operation:

Ball mills operate either in open or closed circuit.

Open circuit operation is best utilized when:

  · Another stage of grinding follows the ball mill

  · Reduction ratio is small

  · Feed material is already fine and one pass through the mill produces the desired results

  · Product size control is not critical and oversize

material can be tolerated in the product Where size control of the final product is important, closed circuit grinding is the most efficient method of operation. The production of a higher quality product at a lower cost justifies the additional capital investment.

Common wet grinding flowsheets of ball mill include:

· Open circuit

· Closed circuit with hydro cyclones

· Closed circuit with vibrating screens

· Two stage variations of the above utilizing two ball mills in series

 

 

Ball mill molino de bolas grinding media solution:

How to add steel balls into the ball mill according to steel ball size ratio?
Generally, the ball mill of new installation has a run-in process. In the process of running in, the amount of steel balls are added into the ball mill account for about 80% of the maximum loading balls. The proportion of steel balls can be determined by the ball size(Φ120mm,Φ100mm,Φ80mm,Φ60mm,Φ40mm).
Different models of ball mill  need different of ball quantity. Let’s take 1500*3000 for an example, its maximum loading ball 9.5-10tons. For the first time the big steel balls (120mm and 100mm) accounted for 30%-40%, medium size balls (80mm) accounted for 40%-30%, the small balls (60mm and 40mm) accounted for 30%.
Someone may ask: why do you suggest to add only 80% steel balls in the running in process of ball mill? That’s because the gears need to mesh after installation of a new ball mill. The capacity(ore quantity) is gradually increased in the process of production. After the ball mill normally runs for two or three days, you should stop the machine and check the meshing situation. If everything is going on well, you can open the hole cover of ball mill to add the remaining 20% steel balls.

 

Note: the small balls are just added in the first time of adding balls. Under normal circumstances, there is no need to add small balls at ordinary times. If the fineness of grinding mill machine can’t meet the requirement of discharging size, you can add an appropriate amount of small balls. When the operation of ball mill is normal, the friction between steel ball and steel ball, steel balls and ores, steel balls and mill liners will make abrasion increases. It follows that the bigger balls become medium size balls, the medium balls become smaller balls.  molino de bolas

Steel ball size proportion: If the diameter of ball mill is below 2500mm, it can be configurated the steel balls with diameter of 100mm, 80mm and 60mm. If the diameter of ball mill is more than 2500mm, it is suitable for the steel balls with diameter of 120mm, 100mm, 80mm.

 

 

Let our engineers review your specifications and recommend the optimum circuit for your ball mill application.

We zhengzhou Hengxing Heavy Equipment Co., Ltd is a professional manufacturer of various kind of ball mill, such as cement ball mill, wet ball mill, ceramic ball mill molino de bolas for mining & building material.

Get a  good ball mill price & quality molino de bolas , welcome to our factory!