Solutions · Industrial Salt Storage
Sodium sulfate and sodium nitrate are crystalline industrial salts for detergents, glass, fertilizers, and chemical production. They cake with moisture, can attack the silo material, and need a clear safety concept. PW Silo Systems designs aluminum and stainless steel silos for industrial salts with you – material and design are defined with you for your product.
Industrial Salt Storage at a Glance
A sodium sulfate silo stores sodium sulfate for detergents, glass, pulp and paper, textiles, or chemical production. A sodium nitrate silo stores sodium nitrate for glass, fertilizers, and other industrial applications. Both feed the salt in a controlled way to weighing, dissolving, or mixing.
Industrial salts absorb moisture and cake into lumps. Depending on the product and its moisture, they can attack the silo material. Sodium nitrate is an oxidizing salt with product-specific safety requirements. That is why the silo material, the design, and the safety concept are defined together with you for your product and your site.
Why Industrial Salts Are Demanding
Moisture, corrosion, and safety decide whether an industrial salt silo runs reliably.
Sodium sulfate and other salts absorb moisture from the air. Damp salt cakes into lumps and bridges at the outlet.
Depending on the product, its moisture, and your process, salts can attack the silo material.
Sodium nitrate is an oxidizing salt. Storage, venting, and the surroundings of the silo must take this into account.
Fine crystals and fines create dust during pneumatic filling and conveying.
In funnel flow, salt can stay in the silo for a long time and cake while fresh product passes through the center.
Sodium sulfate, sodium nitrate, soda ash, and other salts must not be mixed by accident.
Silo Materials
We build silos exclusively in aluminum and stainless steel. Carbon steel is not an option for us: its coating is the only protection against corrosion – and salts attack damaged coating quickly.
Which of our two materials and which design fit your sodium sulfate or sodium nitrate silo depends on the product, its moisture, your process, and your site. We define the material and the design with you.
Your Industrial Salt Silo System
Silo, discharge, blending, filtration, and monitoring are engineered as one system. That means fewer interfaces for your team and components that are designed to work together.
Storage
Concentric mass-flow discharge without asymmetric flow zones – as standard, site-assembled, indoor, or multi-compartment silos.
Learn moreBlending
Gravity blending and homogenizing with four technologies, including PW ConeBlend with a hopper that is quick to clean.
Learn moreDischarge
Air fluidization for uniform discharge of poorly flowing products – prevents bridging and can be retrofitted to existing silos.
Learn moreDischarge
Vibration from unbalanced motors breaks up cohesive forces, resolves caking, and keeps the outlet clear.
Learn moreFiltration
Dust separation during pneumatic filling and conveying – sized for fine powders.
Learn moreMonitoring
Level measurement for reliable monitoring of the silo content – so you know when to reorder.
Learn moreIndustrial Salts
Products marked “Tested in our lab” are on our list of bulk materials. The others we review with you based on your material data before designing the silo.
Tested in our lab
Sodium sulfate, anhydrous sodium sulfate, salt cake
Sodium sulfate is on our list of bulk materials tested in our lab. Silo and discharge are designed against caking.
Tested in our lab
Sodium nitrate, nitrate of soda, NaNO₃
Sodium nitrate is on our tested list. Material, design, and safety concept we define with you.
Tested in our lab
Soda ash, sodium carbonate, dense and light soda ash
Soda ash is on our tested list. Material and design we define with you.
Tested in our lab
Sodium bicarbonate, bicarbonate of soda
Sodium bicarbonate is on our tested list. Discharge aids are planned for this fine powder.
Review with us
Potassium nitrate, saltpeter, KNO₃
Potassium nitrate is also an oxidizing salt. We review your product data and safety requirements with you.
Review with us
Sodium tripolyphosphate, STPP
STPP is used in detergents and industry. We review your material data with you before designing the silo.
Also tested in our lab:
Send us your material data and we will review the right solution with you:
Salt Check
Type in your salt or any other bulk material to see whether it has already been tested in our lab. The list covers 287 bulk materials.
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Service in the U.S.
With more than 40 years of experience in silo engineering, we support your industrial salt silo project from the first design discussion to commissioning. We deliver to every U.S. state and install with our own qualified personnel.
FAQ
Answers to the questions plant managers, engineers, and buyers ask most often about storing sodium sulfate, sodium nitrate, and other industrial salts in silos.
Dry industrial salts can be stored in a properly designed silo. These products are on our list of bulk materials tested in our lab:
Potassium nitrate, STPP, and other salts we review with you based on your material data.
A closed silo protects the salt from outside moisture. Discharge aids such as PW SpeedBlow air fluidization and bin activators break up bridges and caking and keep the outlet clear. Storage conditions for your site we clarify with you.
Sodium nitrate is an oxidizing salt. Silo material, design, venting, and the surroundings of the silo are reviewed with you for your product and your site.
We build silos exclusively in aluminum and stainless steel – never in coated carbon steel. Which material and which design fit depends on the product, its moisture, your process, and your site. We define them with you based on your product data.
In mass flow, the entire silo content moves downward when material is discharged – not just a channel in the center. Your industrial salts leaves the silo in the order it came in (first in, first out), and no product is left behind in dead zones. Our PW StoreLine silos are designed for concentric mass-flow discharge without asymmetric flow zones.
Integrated filters and PW FilterLine dust collectors separate dust during pneumatic filling and conveying. Filter size and venting are matched to your filling rate and your product.
The right size depends on your daily consumption, delivery intervals, the number of products, and the space available at your site. PW StoreLine silos are available in a wide range of sizes and diameters, and silos too large for road transport are assembled on site. We size the system with you – without oversized investment.
Yes. We deliver to every U.S. state and support your project with silo transport, field assembly, silo installation and supervision, and site relocation of existing systems.
Very likely. Our silo systems are designed for nearly all free-flowing, granular, and powdered bulk solids. Send us your material details – particle size, bulk density, moisture, and how the product is filled and discharged – and we will review the right storage solution with you.
Tell us about your products, required storage capacity, how the silo is filled and discharged, and your site conditions. Based on this, we work out the material, silo type, and configuration with you and send you a detailed quote.
