Chemicals,
handled safely.
Stainless steel and alloy conveying systems engineered for chemical and fertilizer plants — corrosion-resistant, dust-tight and ATEX-ready for the most demanding duties.
Corrosion-resistant, dust-tight — built for chemical duty.
At Stellex, we engineer stainless steel and alloy screw conveyors for chemical and fertilizer plants where corrosion, abrasion, dust and safety are mission-critical. From urea and NPK to pigments, catalysts, polymers and biomass feedstocks, our enclosed systems deliver clean, reliable transfer with precise feeding and low maintenance.
Every system is custom-designed to your material, process conditions and compliance requirements — fully documented and backed by a complete spares catalogue.
Six trust markers.
What chemical and fertilizer plants rely on us for — on every project, from quotation through commissioning.
Corrosion & wear resistance
SS 304/316 and specialty alloys with hardened flights and liner options for chemically aggressive or abrasive media.
Dust-tight, safer operation
Fully enclosed designs with sealed bearings, purge options and anti-static liners for hazardous powders.
ATEX & explosion-proof
Zone-rated designs with anti-static components, ATEX-compliant drives and purge sealing for explosive dust environments.
Custom-built
Screw geometry, pitch and alloy chosen for your material — from urea granules to ultra-fine carbon black.
Process-ready integration
Custom inlets/outlets, VFD control and metering accuracy for reactors, dryers, mixers and bagging lines.
Compliance & documentation
ATEX options, ISO-aligned QA and material traceability to support EHS and audit requirements.
Three categories. One discipline.
Broad application reach across the chemical sector — corrosion-resistant, dust-tight and documented.
Corrosive & fertilizer chemicals
- Safe handling of urea, NPK, potash and ammonium nitrate
- Alloy builds with continuous welds and polished internals
- Gas-tight sealing for odorous or hazardous streams
Hazardous & explosive powders
- Enclosed conveying with extraction ports for fine powders
- Anti-static liners and purge sealing
- ATEX design for zone compliance
Biofuels & biomass
- Variable-pitch flights for density swings in feedstocks
- Wear-resistant liners for abrasive biomass materials
- Jacketed screws for integrated drying or heating
Eight sub-sectors. Explore the detail.
From agrochemicals and biofuels to carbon black and specialty chemicals — click any sector for applications, features and materials handled.
Handling of fertilizers, micronutrients and crop-protection powders and granules. Solutions include enclosed conveyance, dust collection at transfer points and accurate batching.
- Safe handling of pesticides, herbicides, fertilizers (urea, NPK, potash, ammonium nitrate)
- Fertilizer mixing lines and seed coating plants
- Micronutrient and crop-protection powders/granules
- Easy integration with bagging and silo systems
- SS 304/316 screw conveyors for corrosion and dust control
- Fully enclosed, explosion-proof designs (ATEX available)
- Accurate batching and mixing
- Anti-stick liners for moisture-prone materials
Urea, NPK, ammonium nitrate, potash, micronutrients, pesticides, herbicides
Biomass feedstock receiving, drying integration and safe powder transfer with explosion mitigation for starches and fine organics.
- Biomass feedstock receiving and pre-processing
- Pellet feeding and biomass handling
- Waste-to-energy and pellet plant conveyors
- Handling of agro-waste, wood chips, rice husk, bagasse and chemical binders
- Abrasion-resistant flights for harsh feedstocks
- Sealed bearings and wear-resistant UHMW liners
- Jacketed conveyors for drying or heating
- Variable-pitch flights for density swings
Biomass, agricultural waste, pellets, chemical catalysts, binders
Pigment and extender handling (TiO₂, CaCO₃, talc) with sealed bag-dump, bin vent filtering and blend uniformity controls.
- Pigment powder and extender handling (TiO₂, CaCO₃, talc)
- Paint base material transfer
- Powder feeding for mixing and blending
- Polished SS 316 internals to reduce contamination
- Sealed, dust-tight design
- Quick-disassembly covers for color change cleaning
- Anti-static liners for fine powders
Titanium dioxide, iron oxides, talc, pigment powders, dyes
Elastomer crumb and powder transfer, anti-bridging flow aids and mixer feeding with minimal material degradation.
- Handling sticky rubber compounds, carbon black and elastomer additives
- Feeding mixers in tire and rubber manufacturing
- Compounding lines for rubber chemicals
- Anti-stick flights and easy-clean surfaces
- Abrasion resistance — hardened or hardfaced flights
- Fully enclosed, dust-tight design
- ATEX/anti-static options for hazardous powders
Carbon black, rubber compounds, elastomer powders, additives
High-purity transfer with contamination control, contained charging and CIP-friendly equipment options.
- High-purity transfer of catalysts, performance additives, coating chemicals
- Corrosive and hazardous specialty product handling
- Alloy construction for corrosion and hazardous duty
- Sealed, contamination-proof systems
- Jacketed conveyors for temperature control
- Gas-tight sealing for odorous or hazardous streams
Catalysts, specialty additives, performance chemicals, coating agents
Abrasive, ultra-fine material handling — wear-resistant screws, low-velocity conveying and robust filtration to control airborne dust.
- Carbon black feeding for rubber, pigment and plastics
- Tyre compound mixing lines
- Pigment loading systems
- Wear-resistant, hardened flights
- Anti-static liners and coatings
- Fully enclosed, dust-tight construction
- Integrated dust collection
Carbon black — ultra-fine and abrasive powders
Cohesive fines (silica, clays) with deaeration, mass-flow hoppers and precise loss-in-weight feeding.
- Precise handling of cohesive, flow-resistant powders
- Loss-in-weight feeding
- Air-assisted conveying for lightweight materials
- Gentle conveying, air-assist and deaeration
- Mass-flow hoppers and integrated dust collection
- Sealed systems for safety and cleanliness
Silica, clays, food additives, pharmaceutical powders, pigments
Additives and fillers (starch, kaolin) bulk storage, pneumatic transfer and point-of-use dust control.
- Bulk additives and fillers (starch, kaolin)
- Pulp transfer and sludge handling
- Recycled paper processing
- Moisture-resistant and corrosion-proof construction
- Low-maintenance bearings and easy-cleaning design
- Dust control integration
Starch, kaolin, paper pulp, recycled paper, fillers
16+ materials. handled efficiently.
A short list — we also build for materials not shown here. Tell us what you're handling.
- 01Urea
- 02NPK
- 03Ammonium Nitrate
- 04Potash
- 05Iron Oxides
- 06Soda Ash
- 07Carbon Black
- 08Polymer Powders
- 09Acidic & Alkaline Additives
- 10Catalysts
- 11Pigments
- 12Specialty Additives
- 13Pesticides
- 14Herbicides
- 15Resins / Plastics
- 16Paper Pulp
Common questions.
Straight answers.
ATEX, corrosion resistance and abrasive duty — what chemical process engineers ask us most.
Q/01Can Stellex supply ATEX / explosion-proof dust collectors and conveyors?
Yes. For combustible chemical dusts we build ATEX-compliant pulse-jet dust collectors with explosion-relief venting, anti-static filter media and earthing-bonding throughout the system, plus zone-rated motors and instrumentation.
Q/02Do you offer PTFE or PFA-lined screw conveyors for corrosive chemicals?
Yes. For acidic and alkaline products (e.g. ammonium nitrate, soda ash, specialty additives) we line troughs and screws with PTFE, PFA, halar or rubber as required, on a base of SS 316L for mechanical strength.
Q/03How do you handle highly abrasive materials like carbon black or pigments?
Abrasive duty uses hard-faced or ceramic-lined troughs, hardened screw flights, reduced rotational speeds and dust-tight enclosures. Pipe diameters and screw clearances are sized to keep wear within predictable service life.
Q/04How is the dust collector sized for a chemical process line?
We size pulse-jet collectors from the duty volumetric airflow (CFM/CMH), dust loading and the required air-to-cloth ratio for the specific material — typically 1:1 to 2:1 m/min for fine chemical dusts — and select filter media chemically compatible with the powder.
Q/05Are Stellex chemical-industry conveyors corrosion-resistant?
Default chemical-duty construction is SS 316 / 316L. For aggressive media we add PTFE/PFA lining, Hastelloy or duplex stainless options. Seals, bearings and gaskets are selected per the product's chemistry and operating temperature.