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Rotoform S8

Rotoform S8

The Rotoform S8 is optimized for sulphur solidification. It is designed to meet small- to mid-size capacity sulphur processing requirements and is the world’s most widely used process for the production of premium quality solid sulphur pastilles. 

If your business needs to convert sulphur into solid pastilles of uniform shape, stability and quality, the Rotoform S8 can help. 

Premium sulphur solidification for small/medium- capacity requirements

Sulphur is usually produced in liquid form at 125–130 °C, making it difficult – and expensive – to transport, handle and store. The Rotoform S8 converts this low-viscosity melt into Sulphur Development Institute of Canada (SUDIC) premium quality pastilles, drawing on our experience with over 700 sulphur installations. It is designed for efficient processing at small- to mid-capacity installations: 

  • On-stream factor of c. 97% 

  • Unrivalled product uniformity 

  • Direct-from-the melt pastillation  

The sulphur pastillation process is environmentally friendly in that production is virtually dust free, emissions are very low due to the speed of solidification, and there is no risk of cross-contamination with the cooling water. 

Where higher capacity is needed, our Rotoform HS is a high-speed model with a throughput rate of up to 15 tons/hour.  

Maximum sulphur processing flexibility

Multiple S8 units can be installed alongside one another. Individual lines can be shut down – and restarted – in minutes, enabling overall capacity to be adjusted to meet changing throughput rates. 

Rotoform S8 credentials

Proven

700+ 

Rotoform sulphur installations

Versatile

10 mPas 

Maximum viscosity handled

Capacity

5.5 tons/hour 

Maximum handling capacity 

How it works

Rotoform S8

Like all Rotoform lines, the Rotoform S8 combines a drop depositor with a steel belt-based cooler. Drops of molten sulphur are deposited onto the moving belt by means of a perforated rotating shell that turns concentrically around a heated stator. 

The heat of the drops is transferred via the steel belt cooler to water sprayed underneath, resulting in rapid solidification. The solidified droplets are discharged from the steel belt as uniform hemispherical sulphur pastilles.  

Benefits

Why choose pastillation with IPCO Rotoform?

Benefits

Rotoform systems

  • Direct from-the-melt solidification

  • Consistent pastille shape and size

  • High bulk density for storage and packing

  • Free flowing for easy handling, storage and reprocessing

  • Environmentally friendly production – dust-free, no risk of cross contamination of cooling water

  • Very low vapor/ gas emissions

Benefits

Designed for sulphur pastillation at medim/high capacity

The Rotoform S8 delivers on all the key requirements of the sulphur processing industry, including: 

  • SUDIC premium quality pastilles 

  • Low friability, minimizing product degradation and dust 

  • High angle of repose, good flow characteristics 

  • High purity and consistent quality 

  • Low residual H2S (< 10 ppm) 

  • Low moisture content (the IPCO Rotoform process does not increase the moisture content) 

  • Unrivalled uniformity 

Technical

Specifications

  • Temperature (max): 125–145 °C 

  • Viscosity (max): 10 mPas 

  • Pastille size: 3–5 mm 

  • Capacity (max): 5.5 t/h 

  • Typical products: sulphur 

Use this solution for

Processes supported

Pastillation

Solidification systems for chemical melts with a high feed temperature

Portfolio showcase

Our Rotoform portfolio

Rotoform 4G

Standard solution for low- and high-viscosity melts

Rotoform 4G CR

For corrosive products

Rotoform 4G FD

For the food industry, e.g. hygiene, easy dismantling/cleaning

Rotoform 4G HT

For melts that feed at high temperature (up to 300°C)

Rotoform 4G MC

For micropastilles down to 0.8mm diameter

Rotoform 4G SC

For subcooling melts in supercooling plants

Rotoform S8

For the particular requirements of sulphur pastillation

Rotoform HP

For increased homogeneity

Rotoform HS

For high-speed, high-capacity pastillation of lower-viscosity products

Rotoform MI

For laboratory use, R&D, and small capacity production (<20 kg/h)

Rotoform XG

For high-capacity pastillation of low-viscosity melts containing solid particles (suspensions)

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