• Ball mill for the dry comminution of hard materials, especially for the ultrafine range < 10 µm in circuit with an GUOTE GF series ultrafine classifier.
• Grinding drum supported in water-cooled, oil-lubricated journal bearings.
• Grinding drum lined with tungsten carbide wear plates or with silex or ceramic elements when the requirement is grinding without iron contamination.
• Grinding elements dictated by the type of lining.

Principle of operation

Ball mills are giant drums that are filled to between 30 and 40% of their volume with freely moving grinding media - in this case balls. The diameter of the balls is between one and several centimetres to suit the application - smaller balls for fine milling results and larger ones for coarser milling tasks.

The drive sets the milling drum into slow rotation and the bed of milling media is thus activated, i.e. the balls are lifted and then impact back against the bed. Ball mills are usually operated at 75% of the critical speed. The critical speed is the speed where, mathematically calculated, the grinding media would centrifuge out. Mills of 2 m in diameter therefore rotate in operation at about 23 revolutions per minute, which corresponds to a peripheral speed of 2.4 m/s.

A mill of this size equipped with steel grinding media converts approx. 50 kW per m³ of feedstock. The feed product is fed continuously through the trunnion and is discharged through slots on the opposite side. The discharge rate can be adjusted as a function of the number of open slots. The ground product is transported - often pneumatically - and is charged to a downstream classifier. The coarse material is returned to the mill together with the feed product.

Features

The classic standard design which has proved itself in operation throughout the world for decades. Both the design and efficiency are continually improved to pay tribute to new technology and market requirements.

*Cast side plates bolted to a rolled-steel drum with integrated manhole.

*Drive via ring-and-pinion gear with automatically controlled tooth lubrication, back gearing with couplings and high-performance gear unit.

*Bearing unit: journal bearing designed as a friction bearing with permanent oil-recirculation lubrication and

temperature control.

*Option: self-aligning roller bearings.

*Product discharge via adjustable slots located around the periphery of the drum. Two-part discharge housing

*with top venting connection and inspection cover.

Variable-speed drive

Ball mills are usually operated at 75% of the critical speed, i.e. in the fringe area between cascading and free-fall. With a specially designed frequency converter, it is even possible to operate a heavy ball mill at variable speed. And if the GF is to be used for grinding ultrafine products or if it is planned to change the product frequently, operation with a frequency converter is particularly advantageous.

Load cell technology results in precision product level control

A high consistency of the product quality demands exact measurement of the amount of product in the mill. Because of this, an optional accessory offered for our ball mills is the load cell system which permits precision control of the product level. The complete ball mill is bedded on a steel or concrete frame designed to rest on a defined number of load cells. The load cells are integrated into a control unit and determine the total weight of mill, grinding media and product. The addition of virgin feed can be controlled with such precision that the mill always operates at optimum load. This means reliable prevention of no-load operation or overfilling, and mill operation is exceedingly cost-effective.

Our service

1. Our engineers can work separately according to the requirements of  design for clients of the equipment. and send a customer confirmation to help customers to save costs.

2. During the manufacture of the equipment, we photograph product production progress, and sent to the customer to track the progress.

3. The goods hair go, we will send the original documents for the customer (such as packing list, bill, CO, Form E, Form A, Form F, Form M, B/L etc.)

4. We can provide customers with free English foundation drawing, installation drawings, manuals, maintenance manuals and parts drawings.

5. We can send our engineers to installation and debugging overseas, and free training of operators and maintenance workers.

6. We have a set of After-sales service system, A ID will be sent to each customer, they can log in this system that view all information to buy equipment and parts by it. We provide 24-hour online consultation. 

Name:Anne Chang

Skype:anna1983cyj

Tel:+0086-18678029069

Fax:+0086-0536-3163838

Mobile:+8618678029069

Wechat:18678029069

Weifang Guote Mining Equipment Co.,Ltd

Address:Dongjing Road East,Economic Development Zone,Qingzhou City,Shandong Province,China

1. How many days do you need to produce this machine?

This is specially designed machine according to your specific requirement. From engineer designing to production completion, It needs about 45-50 days.

2. What does your factory do regarding quality control?

We pay much more importance to quality control from the very begining to the end of production. Every machine will be fully assembled  and carefully tested before shipment.

3. What's your machine quality guarantee?

Quality guarantee time is one year, we choose world famous brand components to keep our machine in perfect working condition.

4. Are you able to give installation and commissioning overseas? How long will it take?

 YES, we supply overseas service, but customer needs to pay for the engineers flight tickets and hotel foods.

 Small machine usually takes within 5 days.

 Big machine usually takes about 20 days.

5. How can I trust you to deliver the right machine as I ordered?

  We will absolutely deliver a good quality machine as we discussed and confirmed in the order. The core of our company culture is innovation,quality, integrity and efficiency. Guote is ALIBABA'S Golden supplier with BV &TUV assessment. You can check with ALIBABA, we have never got any complaint from our customers.