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Latest update: 11.09.2023
RHEWUM GmbH
TEL: +49 (0) 2191 – 5767-
FAX: +49 (0) 2191 – 5767
Rosentalstrasse 24
D-42899   Remscheid
Germany
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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.

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Screening Machines for Lithium-Ion Battery Recycling As the world gravitates towards sustainable solutions, the recycling of lithium-ion batteries has emerged as a crucial element in our green future.
Screening Machines for Lithium-Ion Battery Recycling
As the world gravitates towards sustainable solutions, the recycling of lithium-ion batteries has emerged as a crucial element in our green future. Central to this process is the handling of ’black mass,’ a complex substance that presents unique challenges in recycling and especially screening. Understanding Black Mass Screening Black mass, primarily composed of valuable metals like lithium, cobalt, and nickel, also contains graphite, which complicates the recycling process. Screening is essential at different stages, such as removing larger metal foils during black mass creation and purifying black mass by removing materials like aluminum and copper. The primary challenge arises from the large fraction of fine graphite particles in black mass, which can be as small as 10 µm. The nature of fine graphite as a sticky, greasy material complicates the process. It tends to adhere to other particles, making separation difficult. Additionally, graphite’s propensity to clog meshes and form agglomerates that move as cakes across screens reduces screening efficiency. Traditional screening methods often struggle
18.03.2024  |  065x  |  Product news  | 
Screening machines with pneumatic vacuum cleaning for sorbitol Four profitable RHEsono® vibrating screening machines equipped with pneumatic vacuum cleaning technology have been delivered to Shanghai, China.
Screening machines with pneumatic vacuum cleaning for sorbitol
Four profitable RHEsono® vibrating screening machines equipped with pneumatic vacuum cleaning technology have been delivered to Shanghai, China. These machines are set to advance the sieving process for sorbitol, a widely used sugar substitute and food additive (E 420) in various industrially manufactured food products. Each of the four RHEsono® sieving machines is equipped with three sieve decks and a remarkable processing capacity of 10 tons per hour. The sieving application involves sorbitol with three distinct particle size fractions: 1.25 mm, 0.5 mm, and 0.28 mm. Sorbitol, also known as food additive E 420, glucitol or hexanhexol, belongs to the group of sugar alcohols, making it a crucial ingredient in the food industry as a sugar substitute, carrier substance, and moisture retention agent. The Challenge of Sieving Sorbitol Sorbitol processing can be a challenging task due to its sticky nature even when it has low moisture levels. This characteristic can lead to sieving complications, including mesh clogging, which can negatively impact product quality. To address this issue, RHEWUM’s RHEsono®
14.12.2023  |  263x  |  Product news  |   | 
 Efficient separation technology for foundries Foundries face the challenge of efficiently separating casting molds and sand cores from cast metal parts. This sand must be recycled.
Efficient separation technology for foundries
Foundries face the challenge of efficiently separating casting molds and sand cores from cast metal parts. This sand must be recycled. What is Cast Shakeout and Sand Shakeout? After the molten metal is poured into the molds and solidified, these molds need to be removed to obtain the finished castings. This process is called shakeout. Cast Shakeout specifically refers to the separation of casting molds or cores from the cast metal parts. Cores made of materials such as ceramics, which have a different composition than the surrounding sand, are often used. To obtain the final shape of the casting, these cores need to be removed. On the other hand, Sand Shakeout involves the separation of sand molds and sand cores from the cast metal parts. Sand is commonly used as a molding material in the foundry industry. Once the metal is cast and solidified, the sand molds need to be removed to expose the castings. RHEtrans for efficient Cast Shakeout RHEtrans by RHEWUM is an oscillating chute with an unbalanced drive, known for its economical conveying capability and robust, reliable construction. RHEtrans
11.12.2023  |  249x  |  Insight  | 
Screening machines for dedusting and classification of lignin Screening machines optimize the quality of lignin by removing impurities and dust, classifying lignin pellets by size and eliminating lumps.
Screening machines for dedusting and classification of lignin
Screening machines optimize the quality of lignin by removing impurities and dust, classifying lignin pellets by size and eliminating lumps. Lignin is the second most common biopolymer on earth after cellulose. In the industrial processing of wood, especially in paper production, lignin is produced in large quantities as a by-product. In the past, this by-product was often burned to generate energy, but due to its chemical structure and properties, it is now used as a filler, additive, binder, reinforcing agent or adsorbent. The use of lignin in these and other applications is in line with the trend towards the bioeconomy, in which renewable, plant-based raw materials are used instead of fossil resources. Improved lignin quality Screening machines help improve the quality of the produced lignin and prepare it for specific applications or further processing steps: - Cleaning and separation: Lignin obtained from the pulping process of lignocellulosic materials may contain impurities or undesirable solid components. Screening machines can help to remove these impurities. - Classifying: Lignin particles
08.11.2023  |  261x  |  Insight  |   | 
Insect larvae - smoothly separated with new processes Insect larvae separations require high-precision, smooth screening processes that are suitable for keeping living particles alive in the technical process.
Insect larvae - smoothly separated with new processes
Insect larvae separations require high-precision, smooth screening processes that are suitable for keeping living particles alive in the technical process. RHEWUM uses machines of the RHEflex type, among others, for this purpose. The RHEflex linear vibrating screen is used for protective screening and classification of medium- and coarse-grained bulk materials. For these machines, a special process has been developed for a simplified change of PU-panels. In this process, one screening surface consists of three cassettes each, in which PU-panels are fixed. This gives maintenance teams quick and easy access to the screen elements. Screening elements: Special screen linings made of polyurethane For separation, polymesh PU screen panels made of polyurethane are used instead of screen cloths. The abrasion-resistant and cost-efficient polymesh screen panels combine durability with maximum precision. They are ideal for screening fine, abrasive or moist materials. In this way, smooth separation of larvae from the culture medium can be carried out.
11.10.2023  |  335x  |  Press release  | 
Sand extraction through mobile processing Due to the flourishing construction industry, sand is now the second most traded raw material after water. But suitable sand resources are limited. RHEWUM has developed a solution to produce sand from widely spread gravel right next to the customer.
Sand extraction through mobile processing
Due to the flourishing construction industry, sand is now the second most traded raw material after water. But suitable sand resources are limited. RHEWUM has developed a solution to produce sand from widely spread gravel right next to the customer. A flourishing construction industry without sand is unthinkable. According to One Stone Consulting, around 10 to 15 billion tons of building sands are required worldwide each year (1). In addition, we need industrial sands, for example for fracking or the glass industry. This corresponds to a per capita sand consumption of about two to eight tons per year, so that a total of 40 to 50 billion tons of sand and gravel must be extracted. This makes sand the second most traded raw material after water (2). Since the demand for sand is growing faster than suitable sand resources can be found, sand is instead produced from gravel or transported over long distances. This is not environmentally reasonable. RHEWUM has developed a solution to process sand mobile and therefore directly on site. THE RAW MATERIAL Quartzite sand is mainly used in the construction industry. It consists of silicon dioxide (SiO2). The great hardness of the material (7° according to Mohs) is an advantage.
14.09.2023  |  413x  |  Product description  |   | 
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