Rhewum
 | The topic of this article may not meet Wikitia's general notability guideline. |
| Industry | Screening and separation equipment |
|---|---|
| Predecessor | Alexander Gassinger & Co. AG |
| Founded | October 14, 1927 |
| Headquarters | Remscheid , Germany |
Key people | Sigurd Schütz (Managing Director) |
| Website | www |
RHEWUM GmbH is a German manufacturer of industrial screening machines and particle separation systems, headquartered in Remscheid, Germany. The company develops and supplies equipment for industries including fertilizers, minerals, recycling, construction materials, and industrial sands.[1]
History
The company was founded on 14 October 1927 as Alexander Gassinger & Co. AG in Remscheid.[2] Initially producing tools and mechanical parts, it began manufacturing screening equipment in the mid-20th century, delivering its first magnetic screen in 1950.[3] Since then, it has manufactured over 6,000 screening machines for customers worldwide.[4] In 2011, the company supplied multiple screening units for the Dubal aluminium smelter project in Dubai.[5] In 2013, Sigurd Schütz was appointed Managing Director.[6]
Technology
RHEWUM designs include high-frequency vibrating screens, double-frequency (DF) vibrating screens, and directly excited screening machines. DF screens use two unbalanced motors with different speeds to optimize both material loosening and precision separation in a single machine.[7][2] Direct-excitation machines vibrate only the screen mesh, enabling high acceleration and precise classification for fine particle sizes down to 0.16 mm.[2] This technology is used for energy efficiency as well, with directly excited machines typically consuming around 50% less energy than conventional vibrating designs over their service life.[8]
Applications
The company’s equipment is used in various sectors:
- Fertilizers – In potash and calcium ammonium nitrate processing, RHEWUM machines perform tasks such as pre-screening, granule sizing, and dewatering.[7][9][10]
- Recycling – In municipal waste incineration residue processing, RHEWUM’s WAF screens have been used to separate non-ferrous metal concentrates, improving purity before further sorting.[11]
- Construction materials – The Liberty Screen concept enables mobile on-site sand processing, reducing transport needs and enabling production of fine concrete sands directly at quarries.[12]
- Metals & industrial minerals – Projects have included screening bauxite, alumina, and other raw materials for the aluminium industry.[13]
Notable projects
In 2019, Yara International expanded capacity at its Rostock plant by duplicating its existing RHEWUM screening line for calcium ammonium nitrate. The project incorporated DF coarse screens, linear vibrating screens, and high-frequency fine screens, achieving throughputs up to 350 t/h.[9] Earlier, RHEWUM supplied screening technology for large-scale potash and fertilizer plants, as well as alumina processing facilities in the Middle East.[14]
Research and testing
RHEWUM operates a technical center in Remscheid equipped for full-scale screening trials under industrial conditions. In 2012, the company began conceiving and expanding this facility to conduct both dry and wet screening under realistic process parameters; it became fully operational in autumn 2014.[15] Facilities include recirculating and single-pass screening loops, dynamic air classification, cyclone separation, and temperature-controlled wet classification up to 80 °C.[16] According to Managing Director Sigurd Schütz, “Only through constant further development of solution-oriented products is it possible to create added value for the client… individual solutions and a high quality standard … is the path RHEWUM has chosen.”[17] The pilot plants can handle samples from 10 kg up to over 1 t and support simulation of long-term effects such as mesh clogging.
In 2025, RHEWUM presented its patented screening technology at an international sustainability congress in London. The system was developed to significantly reduce energy consumption in bulk material processing by using direct excitation of the screening cloth rather than vibrating the entire machine body. According to the company, this design lowers power demand by up to 50 percent compared with conventional screens, while also extending machine service life through reduced mechanical wear. The innovation was introduced as part of efforts to strengthen the role of resource-efficient machinery in global industries such as fertilizers, chemicals, and recycling.[18]
Workforce and corporate culture
RHEWUM has emphasized long-term employee retention, with staff frequently serving the company for several decades. In 2025, the firm publicly recognized multiple employees for over 40 years of service, highlighting the role of continuity and experience in its operations.[19]
References
- ↑ BulkInside: RHEWUM GmbH
- ↑ 2.0 2.1 2.2 "So lässt sich Kalium sieben". Steinbruch & Sandgrube (in Deutsch). March–April 2020.
- ↑ "Testen unter realen Bedingungen" (in Deutsch). AT Minerals.
- ↑ "Testen unter realen Bedingungen" (in Deutsch). AT Minerals.
- ↑ "New Rhewum screens for Dubal". AT Minerals. January–February 2011.
- ↑ "Sigurd Schütz übernimmt Geschäftsführung". CHEManager (in Deutsch).
- ↑ 7.0 7.1 "Siebmaschinen für die Kali-Industrie". Schüttgut (in Deutsch). No. 3. 2020.
- ↑ "GreenScreens – Was kostet eine Siebmaschine wirklich?". Recycling aktiv (in Deutsch). No. 2. 2015.
- ↑ 9.0 9.1 "Kapazitätserweiterung für schwieriges Siebgut". Schüttgut (in Deutsch). No. 2. 2019.
- ↑ "RHEWUM screens calcium ammonium nitrate (CAN)". AT Minerals. March 2011.
- ↑ "Aufbereitung von NE-Metallkonzentraten aus Müllverbrennungsschlacken". Recycling aktiv (in Deutsch). No. 1. 2014.
- ↑ "RHEWUM develops mobile sand processing". Construction World. April 2020.
- ↑ "New Rhewum screens for Dubal". AT Minerals. January–February 2011.
- ↑ "New Rhewum screens for Dubal". AT Minerals. January–February 2011.
- ↑ "Testen unter realen Bedingungen" (in Deutsch). AT Minerals.
- ↑ "Rhewum : station d'essai en conditions industrielles". Le Journal du Vrac (in français). No. 100. 2014.
- ↑ "Testen unter realen Bedingungen" (in Deutsch). AT Minerals.
- ↑ "Nachhaltige Siebtechnologie: Remscheider Maschinenhersteller stellte in London sein patentiertes Verfahren vor". Remscheider General-Anzeiger. 14 August 2025. Retrieved 21 August 2025.
- ↑ Johanna Tüntsch, "Treue Fachkräfte: Lüttringhausen: Wie aus einem Ferienjob plötzlich 40 Jahre wurden," RGA Online, 17 August 2025.
External links
This article "Rhewum" is from Wikipedia. The list of its authors can be seen in its historical. Articles taken from Draft Namespace on Wikipedia could be accessed on Wikipedia's Draft Namespace.