Due to the widely varying material characteristics of different types of calcium carbonate, the efficient handling and feeding of this material requires some expertise

The design of a feeding or pneumatic conveying system is heavily influenced by a bulk solid’s particle shape, size (aspect ratio) and particle size distribution as well as the particle’s roughness, hardness (abrasiveness), and density. In the case of calcium carbonate these characteristics vary widely depending on the source and production process of the individual bulk material. As a consequence, pneumatic conveying systems cannot be purchased "off-the shelf" and must be engineered for each situation individually. Laboratory tests are often necessary to help determine a material’s properties and behavior.

Coperion K-Tron has the necessary expertise for developing systems and providing components tailored to your specific CaCO3 handling and feeding needs within your production facility. In addition, we can provide full-scope material testing at our professional and fully equipped testing facilities, located around the globe.

Benefits & Features

  • Every solution is developed by drawing from Coperion K-Tron’s extensive experience in providing material handling solutions
  • Fully-equipped professional testing facilities located around the globe
  • Extensive range of conveying and feeding equipment available
  • The Coperion K-Tron Systems Group can supply integrated systems with one source management and customized controls

Application Example

K2-ML-T60 Twin Screw Feeder on SFT load cells, suitable for feeding calcium carbonate

Calcium carbonate (CaCO3) is one of the most popular mineral fillers used in the plastics industry. In this application example, the customer needed to transfer 4.5 t/h (10,000 lb/h) of calcium carbonate from a storage bin to a filter receiver located on top of a rotary valve for the extrusion of PP and CaCO3 at a plastics compounding facility. The facility is located at 305 m (1000 ft) elevation with an average daily temperature of 29.5°C (85°F) during the entire year.

After the customer gave us two different samples of CaCO3 to test, it was decided to completely redesign the previously foreseen system layout. The significant particle characteristic differences between the samples led to the selection of different equipment components as well as a different sizing of the entire system.

Download the application sheet for more info:

Product Range


Coperion K-Tron offers a wide range of versatile feeding equipment for mastering any type bulk material feeding challenge. Our most efficient volumetric and highly accurate gravimetric feeders are ideal for metering and accurately feeding even the most difficult to handle bulk material.

Volumetric and Gravimetric Feeders

Process Equipment

Coperion's and Coperion K-Tron's portfolio does not only encompass a broad selection of first-class equipment for all types of production processes but also sports proven heavy-duty components such as the ZHD Rotary Valve for typical products in the minerals industry.

Learn more about our Rotary Valves and Filter Receivers.

Coperion K-Tron Compounding Line

Material Handling

Coperion and Coperion K-Tron offer both standard and tailor-made material handling solutions. In order to provide for safe and efficient material transfer, we offer a broad range of components and systems for your processing needs, including material storage equipment, discharge components, pneumatic conveying, mechanical conveying, weighing and controls systems.

Pneumatic Conveying Systems
Coperion pneumatic conveying system

Plants and Systems

Our many years of experience as well as competence in process engineering design ensure that our plants and systems have a high level of operational reliability and safety as well as maximum availability.

Plants & Systems
Coperion service technician


Rely on the superior global Coperion and Coperion K-Tron service. We provide standardized and highly customized service packages for machines, plants and equipment. Our comprehensive range of services secures your plant reliability and maximum lifetime.


Literature Downloads

Subscribe to the Coperion Newsletter