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Milling machines are used to reduce the size of material by cutting, crushing, or grinding it. The choice of industrial milling equipment depends on the industry and the materials to work with. Besides, there is a significant difference between those aimed to remove layers from metal or other materials workpieces and those designed to reduce particle size for materials that come in bulk.

Milling

Bentonite is a clay derived from the alteration of volcanic ash. Bentonite is solid, so after extracting it from the deposits, it has to be crushed and dried to reduce its moisture content up to 15%.

Bentonite

A horizontal rotary ball mill drum can be used for grinding of dry hard materials, such as hard minerals for the ceramic, glass or porcelain industry and processing of soft minerals with abrasive properties.


<h2>Dry ultrafine grinding of mineral powders and ceramic raw materials</h2>
The Super Orion ball mills from Hosokawa Alpine are employed for the dry ultrafine grinding of mineral powders and ceramic raw materials. The ball mill is designed for the dry comminution of hard materials, especially for the ultrafine range &lt; 10 µm in circuit with an ALPINE ultrafine classifier.

Ball mills are giant drums that are filled with 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 centimeters to suit the application - smaller balls for fine milling results and larger ones for coarser milling tasks.

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Horizontal rotary ball mill drum

Table roller mills are robust and time-proven mills for soft to medium-hard mineral raw materials and industrial bulk materials. The advantages of the table roller mill are the simple fineness adjustment and fast product change. Table roller mills are used wherever a high degree of production flexibility is demanded.


<h2>Flexible production of large amounts of fines</h2>
The Table Roller Mill AWM from Hosokawa Alpine operates in accordance with the principle of pressure comminution, making them suitable for brittle but elastic feed products to deliver end-product fineness values of between approx. 10 µm and 100 µm.

A fundamental feature of Alpine's table roller mill is the optimized kinematics of the grinding rollers and grinding table to permit the production of large amounts of fines

Table roller mills are used wherever a high degree of production flexibility is demanded, for example for limestone, gypsum, dolomite, talc, petroleum coke, bentonite, quick lime, and so on.

Table roller mill

When you need to produce ultra-fine powders, the milling and drying process employed is what ensures the consistency of your product. To process minerals and chemicals, you need a machine which is powerful, flexible, simple to maintain.


<h2>Versatile and highly efficient milling and drying</h2>
Atritor’s cell mill has been constructed to produce ultra-fine powders. It is able to grind, flash dry, classify and surface coat powders at the same time. Its capacity ranges from 50 kilograms per hour to 15 tonnes per hour, with evaporation rates up to 3,000 kilograms per hour.

The feed can be dosed directly into the machine via a screw feeder or via the inlet air duct. It is then ground in a vertically mounted, multi-stage rotating rotor. Each of the rotor sections is constructed with up to 200 quick-change blades. There is also the possibility for a classifier which is mounted at the discharge section to ensure that oversized feed particles are either discarded or recirculated.

The mill acts as an efficient dryer when the process air is heated using a hot air generator or even waste heat from another process. It can reach an inlet temperature of up to 450ºC. Heat energy from the process can be recovered from the heated air stream and utilized to preheat the intake air. After flash drying, the product is kept cool due to evaporative cooling via the constant exposure of new surface areas of the product created during attrition.

In the case of minerals that require surface treatment, the cell mill provides a range of coatings and surface modifiers that can be added on the side of the machine during the milling process. It has a wide range of applications, from minerals like GCC, clay and limestone to chemicals, dyes, pigments and a wide range of food ingredients and by-products.

Milling and drying machine for fine powders

Drying and grinding can be an important feature when trying to process products such as raw and refined minerals, organic and inorganic chemicals, food ingredients and waste streams. It is crucial to maintain particle size and consistent quality of the finished product during such processes. You will need an efficient and abrasion resistant attrition solution to pulverise and dry your product into your required particle size.


<h2>A simplified process while drying and grinding ensuring high product quality</h2>
Atritor’s Dryer-Pulveriser is able to grind and dry the product simultaneously. It is an air-swept mill that uses an air stream to efficiently process the product and controls the final particle size. It is able to process feedstocks of up to 50+mm and production capacities from 100kg/h up to 30t/h with evaporation rates up to 6,000 kilograms per hour.

The mill acts as an efficient dryer when the process air is heated using a hot air generator or waste heat from another process. It can reach an inlet temperature of up to 550ºC. Heat energy from the process can be recovered from the heated air stream. After flash drying, the product is kept cool due to evaporative cooling. The output temperature of the product is maintained accordingly to control the moisture content of the product.

The Flash drying grinder for powders is configured with a combination of variable speed rotor, hammer arrangement and fixed pins. Turbulence inside the grinding area creates attrition to reduce the particle size, which can be controlled for simple deagglomeration of the product. An internal classifier configuration can also be used to further control particle size.

The ‘A’-series is constructed with internals that are resistant to abrasion for applications that can cause high amounts of wearing to the equipment. Where the desired amount of evaporation required far exceeds the grinding duty, the ‘B’-series machine of a lighter weight, fully fabricated configuration permitting higher airflows can be used for non-wearing product or duties, as well as for for applications in which stainless steel contact parts may be necessary.

Flash drying grinder for powders

Find production technology for Milling Bentonite, and connect directly with leading machine manufacturers worldwide

Milling Bentonite

Which milling bentonite equipment do you need?

Horizontal rotary ball mill drum

Table roller mill

Milling and drying machine for fine powders

Flash drying grinder for powders

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