Insect larvae - smoothly separated with new processes

RHEWUM is an independent family owned company which was founded in 1927 as „Rheinische Werkzeug- und Maschinenfabrik“. We have been developing and manufacturing screening machines and vibrating feeders since the beginning of the 1950’s. These cover the entire field of dry, wet and analysing screens for a vast variety of applications for leading companies worldwide. Our screening technology is used by leading companies worldwide, across a broad spectrum of different industrial tasks.

Calcium carbonate is a material that originated from the remains of single-celled sea creatures over millions of years of Earth’s history. Today, it is the basis for a range of commonly used building materials, including limestone and dolomite. Finest separations up to 0.1 mm A British customer discussed with RHEWUM ways to renew an aging installation for processing calcium carbonate. Several existing sieving machines and sifters were to be replaced. Fine separations up to 0.1 mm were performed. Setting vibration during operation Machines with direct excitation of the screen fabrics were planned as the machine type. Drives for the decks on which coarser separations were to be performed were unbalanced motors. The decks for fine separations were equipped with oscillating heads that allow the vibration to be changed during operation via thyristor controllers. The machine types of choice were then RHEsono, RHEmoto and RHEfino as a combination of both types. For the task of feeding the material onto the machines, RHEside feeders with lateral feeding were used. Customer requirements were met With

Sodium carbonate is difficult to screen as its hydrophilic properties cause agglomerations. RHEWUM’s high quality sieving technology increases production. Soda ash is obtained from sustainable production sources, such as the processing of wood. Soda ash is an indispensable raw material in partticular for the glass industry, but also used as a bleaching agent in the chemical industry and not least in the lye of Bavarian pretzels. The demand for high-quality soda ash is high. The quality of the soda granulate is significantly influenced by the performance, and thus the quality, of the screening machine in use. Soda ash is considered to be a difficult material to sieve, which easily sticks to the screening mesh and tends to form lumps due to its hydrophilic properties. The screening mesh can quickly become clogged and the entire production come to a standstill. Thus, the reliable supply of soda ash for important industrial sectors, and with it the capacity of soda ash producing plants, depends on the screening machine. With the RHEWUM WA, RHEWUM offers a state-of-the-art screening machine with direct excitation of the

From now on, customers can follow the screening test of their product live or book a virtual tour of the RHEWUM GmbH production facilities. If you wish, we would be happy to combine the two for you. Considering the current pandemic situation, some time may pass before customer visits to our company are part of our daily business again. But we don’t want to keep you, our customers, waiting. That’s why we are offering you the opportunity to follow your screening test live in our technical center via smartphone, tablet or computer. Join us virtually when your product is tested and discuss the results directly with our screening experts. You can find out more about the process of a screening test on our homepage. Or experience RHEWUM GmbH live on a tour through the production facility and the technical center where you will get an exciting insight into our German quality production. Of course, you can also combine the tour with your screening test. Make an appointment with our screening experts today for your personal, virtual meeting at RHEWUM.

In the production of sodium carbonate with fluctuating feed rates and finest separations in the range of 200 µm, many manufacturers rely on the proven screening quality of the RHEWUM WA vibration screening machine to achieve optimum quality of their produ Sodium carbonate has been used by humans for a long time and is considered one of the most versatile chemical products. Its applications include the glass industry, the chemical industry, the pulp and paper industry as well as the detergent and soap industry. The screening task usually consists of screening out the existing dust content from the actual soda product. Recent screening tests with sodium carbonate at the RHEWUM technical center confirm that the type WA screening machine is perfectly suited for finest separations at high capacities. The screen cloth is excited to high-frequency vibrations by means of beater bars directly applied to the screen cloth. Outside of the screen housing rugged electromagnetic drives rock the knocker shafts, conveying the high frequency oscillation directly into the screen mesh. Accelerations of up to 15 g and more are thus achieved on the screen cloth. The power of the electromagnets can be adjusted during operation via an electronic