Supplier sign in
Home
STAY INFORMED
Subscribe to our monthly newsletter.
Your email address will never be disclosed to any third party.
Read our privacy notice.

       

Product news
03.01.2025  |  1357x
Share this item
Screening Silica

Precise separation of silica and silica gel

The processing of silica and silica gel requires precise and specialized screening technology.

These materials, whether as a desiccant, carrier material or additive, pose complex challenges due to their specific properties such as different particle sizes, hygroscopic nature, dust formation and abrasiveness. Especially when used in food supplements, purity and gentle product processing are crucial.

Screening ensures compliance with strict quality standards by classifying the materials into particle sizes and removing unwanted particles such as fine dust or oversized particles. This optimizes both further processing and the overall quality of the end product.

Screening of silica powder and gel
In the processing of silica and silica gel, screening machines are used in several production steps:
  • Dedusting: removal of fine dust (<0.1 mm/ 140 mesh) to minimize clumping and dust pollution.
  • Classification: separation into specific fractions, e.g. 0.1-0.5 mm (140 – 35 mesh) for powdery products or 1-6 mm (18-3 mesh) for granulates
  • Oversize separation: Removal of oversized particles (>6 mm/ 3 mesh) that could affect product quality.

Challenges at silica screening

  • Hygroscopic: Moisture leads to clumping and screen blinding.
  • Development of fine dust: Requires dust-tight machines for safe operation.
  • Agglomeration: Particularly with fine particles (<0.1 mm/140 mesh), particle accumulation occurs, which makes the separation process more difficult.
  • Hygienic requirements: For use in food supplements, machines must be food-safe and easy to clean.
  • Abrasive: High wear on screen cloths and machine parts.

The solution: RHEsono or RHEfino

RHEsono and RHEfino screening machines with the matching RHEmid or RHEside feeding systems have been supplied worldwide - from the Netherlands and China to Korea and Venezuela - for these demanding tasks. This combination offers significant advantages:
  • High vibration forces directly on the screen cloth: Dissolve agglomerates and ensure precise separation of even the finest particles.
  • Dust-proof and gentle on the product: Fulfill the highest safety requirements and maintain material quality - ideal for applications in the food and pharmaceutical industries.
  • Automatic cleaning cycles: Minimize screen blinding and maximize throughput.
  • Flexibility in separation: From 0.1 mm to 6 mm (140 to 3 mesh) in just one machine - depending on the application and material requirements.

The RHEWUM promise:

  • Precision: Perfect separation in narrow particle size ranges, adapted to individual customer requirements.
  • Efficiency: Maximum productivity thanks to automatic cleaning and dust-tight operation.
  • Global experience: Many years of expertise and proven solutions in a wide range of regions and industries.
  • Hygiene and product protection: Special solutions for the requirements of the food and pharmaceutical industries.
  • Durability: Robust design that can even withstand abrasive materials.

Contact us today and let us build the most precise and efficient screening machine for your silica or silica gel.

Company information

More items

Exceptional Purity Levels for Sustainable Construction Materials A pioneering company specializing in the development and manufacturing of equipment for the recycling industry has launched an innovative project in the Netherlands. The goal was to process burned soil as a valuable supplement for building materials.
Exceptional Purity Levels for Sustainable Construction Materials
A pioneering company specializing in the development and manufacturing of equipment for the recycling industry has launched an innovative project in the Netherlands. The goal was to process burned soil as a valuable supplement for building materials. This challenging application, primarily involving dust and ash from burned solids like earth and sand, requires ultra-fine screening at 60 μm (230 Mesh) with highest purity demands. Soil is burned to eliminate harmful organic contaminants, pathogens, and invasive species, which otherwise render the soil unsuitable for construction purposes. By eliminating these impurities, the recycling industry transforms this cleaned soil into a valuable, sustainable raw material for building applications, contributing to a circular economy and meeting high environmental and safety standards. To realize this transformation, the facility was designed to achieve high-precision separation with a throughput of 20 t/h. The fine grain size, along with the abrasive and corrosive nature of the material, and temperatures reaching up to 200°C, required advanced solutions. RHEWUM’s extensive screening trials proved successful, delivering machinery that achieves product purity of nearly
30.10.2024  |  549x  |  Press release  |   | 
Screening machine for sorbitol production Precise screening machine enhances sorbitol production for a leading sugar substitute producer from Turkey
Screening machine for sorbitol production
Precise screening machine enhances sorbitol production for a leading sugar substitute producer from Turkey Turkish starch industry leader chooses RHEWUM’s cutting-edge technology for sorbitol production A leading enterprise in the Turkish starch and starch derivatives industry, with a legacy dating back to the 1980s, continues to drive innovation. Known for its unwavering commitment to advancement and diversification, this sorbitol producer from Turkey has expanded its product portfolio to cater to various sectors, including food, textiles, paper, chemicals, pharmaceuticals, personal care, and specialized industrial applications. One of the standout products in their range is sorbitol, a low-calorie natural sweetener with a low glycemic index. In a strategic move to further enhance their sorbitol production capabilities, this Turkish enterprise recently chose RHEWUM’s cutting-edge RHEsono® screening machine, achieving an impressive throughput of 4 tons per hour with precise particle separation at less than 0.5 mm and 0.1 mm. The RHEsono® vibrating screening
20.10.2024  |  842x  |  Product news  | 
Screening Machines for Explosives Dust explosions remain a serious threat in industries dealing with explosive low ignition energy materials, particularly in the defense sector. What has to be considered when screening explosive materials?
Screening Machines for Explosives
Dust explosions remain a serious threat in industries dealing with explosive low ignition energy materials, particularly in the defense sector. What has to be considered when screening explosive materials? By investing in high-quality, static, and gas-tight screening machines, companies can significantly reduce the risk of dust explosions, ensuring both employee safety and the integrity of their production facilities. In industries handling explosive materials, such as the production of black powder and ammonium nitrate, dust explosions present a significant hazard. Dust explosions are not limited to organic materials but can occur with any finely powdered combustible material that meets specific conditions, especially in high-risk industries. Dust explosions occur when three main conditions are met: # Critical Dust Concentration – Fine particles suspended in air, particularly below 0.4 mm in size, create an explosive atmosphere. For example, the explosion severity index (KSt) for fine materials can exceed 140 (bar·m/s), classifying them as ST1, a moderately explosive category. # Oxygen – The presence of at least 9% oxygen is required for an explosion, making
26.09.2024  |  597x  |  Press release  | 
Hydrogen-tight screening of silicium Screening the finest silicon powder requires the highest purity standards. Not challenging enough? Then make it gas-tight for hydrogen This is how it works:
Hydrogen-tight screening of silicium
Screening the finest silicon powder requires the highest purity standards. Not challenging enough? Then make it gas-tight for hydrogen This is how it works: he highest purity standards are required for the sieving of high-purity silicon powder, which is used in chip and solar panel production. Even the smallest impurities can have serious consequences for the quality of the end product. RHEWUM has risen to this challenge and supplied three RHEsono® screening machines that have been specially developed for screening the finest silicium powder. The focus here was on a special technical requirement: hydrogen tightness. One of the biggest technical challenges was that the screening machines had to be gas-tight, in particular hydrogen-tight (H2-tight). In a hydrogen atmosphere, the hydrogen protects the sensitive silicon powder from unwanted chemical reactions that could be triggered by metal ions (hydrogen passivation). This protective effect is crucial to ensure the high purity of the end product. However, the extremely small hydrogen molecules can pass through steel and cause hydrogen embrittlement, which makes the
20.09.2024  |  653x  |  Product news  | 
Fertilizer with high production rate and product purity How do you achieve maximum product purity and high throughput rates when screening hygroscopic diammonium hydrogen phosphate (DAP)?
Fertilizer with high production rate and product purity
How do you achieve maximum product purity and high throughput rates when screening hygroscopic diammonium hydrogen phosphate (DAP)? Diammonium hydrogen phosphate (DAP) is an essential component of many fertilizer compositions due to its high phosphorus and nitrogen content. When screening DAP, producers are faced with the challenge of ensuring fine and homogeneous particle sizes, while at the same time guaranteeing a high production rate and product purity. Challenges in the sieving of DAP Screening DAP is technically challenging as the material is hygroscopic, i.e. it absorbs moisture from the ambient air and has a tendency to form agglomerates. These agglomerations make it difficult for the material to pass through the screen meshes and impair the efficiency of the screening process. In addition, high throughput rates can lead to blinding and clogging of the screen mesh, which can result in the screening process having to be completely interrupted, bringing the entire production process to a standstill. Precise screening using innovative technology RHEWUM specializes in screening challenging
02.09.2024  |  619x  |  Insight  | 
PORTALS
BulkSolids-Portal Schuettgut-Portal Recycling-Portal
Related
Bulkgids.nl
SIGN UP FOR OUR NEWSLETTER
Newsletter archive
Service and contact
ContactDisclaimerPrivacyAdvertising
FOLLOW US
Linked