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Maker - Product Challenge

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Grinders use a spinning blade or rotating abrasive elements to reduce the size of various materials. The specifications, RPM and grit of the engineered grinder, will result in various particle sizes. As a result, what you want to make will determine the type of grinder you need. Grinding is used for improving the texture and flow properties of various products and to enhance the flavor of food products such as coffee, spices, sugar, nuts, sesame, poppy seeds, lentils, wheat, and rice. Choosing the right rotational speed, grinding elements, and processing power allow the grinding and shredding of a wide range of materials into coarse or fine powders. Popular types of heavy duty grinders in food processing include angle grinders, bench grinders and meat grinders.

Grinding

Limestone

Many industries require reliable pelletizing equipment with smaller scale production capacities. These industries include chemicals, pharmaceuticals, synthetic material manufacture, waste disposal and recycling, minerals, and energy where compaction and uniform output are important but high volume production of a pelletized product is not necessarily the industries’ focus.


<h2>Robust smaller scale pelletizers with a proven design from an industry leader</h2>
Amandus Kahl produces smaller scale pelletizing presses with proven success for many types of products that often do not require the high volume production of larger presses. This line of presses uses the proven technology of Amandus Kahl’s larger sized presses in a scale more appropriate to the smaller production volumes. The presses use pan grinder rollers to compact the input material and force it through a flat pelletizing die forming continuous strands of compacted product. The strands are then cut to the desired length using rotating knives.

The pan grinder rollers and knives rotate slowly ensuring optimum pellet quality and minimized generation of noise and heat. The grinder roller speed is infinitely adjustable. The grinder roller gap and strand cutter are also adjustable for optimized pellet quality for your particular needs.

The flat die design ensures even distribution of feed material and optimized pressure in a more compact package than traditional ring die type presses. Pellet dies are readily changeable without specialized tools for easy experimentation and process development aiding the customer in developing a process that is optimized for their product. Amandus Kahl variable speed proportioning screw is often used in conjunction with these units to ensure consistent and uniform feeding of raw materials.

Small scale pelleting press

Production of certain pelletized products requires working with output products of a pasty consistency. These products include pigments, clay, detergent additives, vitamin products, and many other products where problems of adhesion of fresh pellets are often encountered. Processing of these types of products requires a pelletizing press that allows the fresh pellets to be directly deposited on a gently transporter such as a conveyor.


<h2>A pelletizing press for depositing pellets directly onto your conveyor</h2>
Amandus Kahl produces pelletizing presses with overhead drives that allow pellets to be deposited directly onto a conveyor from above-eliminating the adhesion issues of fresh pellets often encountered with pasty products. This line of presses uses the proven technology of Amandus Kahl’s other pelletizing presses but the drive unit is above the pelletizing die rather than below it allowing gentle direct deposition of the fresh pellets onto a conveyor. The presses use pan grinder rollers to compact the input material and force it through a pelletizing die forming continuous strands of compacted product. The strands are then cut to the desired length using rotating knives.

The pan grinder rollers and knives rotate slowly ensuring optimum pellet quality and minimizing generation of noise and heat. The grinder roller speed is infinitely adjustable. The grinder roller gap and strand cutter are also adjustable for optimized pellet quality for the customer’s particular needs.

Pellet dies are readily changeable without specialized tools for easy experimentation and process development aiding the customer in developing a process that is optimized for their product. A Kahl variable speed proportion screw is often used in conjunction with these units to ensure consistent and uniform feeding of raw materials.

Pelleting press with overhead drive

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 Limestone grinding, and connect directly with leading machine manufacturers worldwide

Limestone grinding

Which limestone grinding equipment do you need?

Small scale pelleting press

Pelleting press with overhead drive

Milling and drying machine for fine powders

Flash drying grinder for powders

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