Bridging, ratholing, and material scaling: When material flow comes to a standstill in the bulk solids industry, expensive production downtimes and massive safety risks are inevitable. With its new, interactive Silo Blockage Simulator, NT Service GmbH is setting new standards in customer education, demonstrating how modern flow and blockage problems can be visually decoded – before the first technician even arrives on site.
In theory, silo physics are simple: bulk material is loaded at the top and flows out evenly at the bottom due to gravity (mass flow). In reality, however, everyday operations in the food, feed, construction, and chemical industries often look quite different. Fluctuations in moisture, electrostatic charges, or poor flow properties can transform stored material into an unpredictable medium.
When the discharge stops, plant managers and maintenance teams face a massive logistical and financial challenge. The problem: from the outside, it is usually impossible to see how and where the material has jammed inside the silo.
The Three Invisible Dangers Inside a Silo
Those who do not understand the root cause of a blockage often choose the wrong – and most dangerous – method to resolve it. Our new Silo Blockage Simulator visualizes the three most critical scenarios that occur in daily industrial operations:
- Bridging; The material interlocks above the outlet, forming a stable arch or dome with an empty space beneath it. The danger: Ill-advised mechanical force applied from the outside can cause the bridge to collapse abruptly. The resulting impact forces (dynamic loads) can severely damage or even destroy the structural integrity of the entire silo.
- Ratholing (Material Scaling); A so-called core flow develops. Material only discharges directly above the outlet, while the outer zones cake together and harden. The consequence: The usable silo volume drops drastically. In the case of organic materials, there is also a risk of spoilage, mold growth, or, in the worst-case scenario, spontaneous combustion deep within the caked material.
- Total Funnel Blockage; The discharge zone is completely obstructed due to extreme compaction. At this stage, hammering or vibrating no longer helps – any mechanical impulse from the outside only compresses the material further.
The Interactive Tool: Moving from Guesswork to Understanding
”In the initial panic, many clients resort to hammers or vibration motors. However, this usually only worsens the blockage,” explains the management of NT Service GmbH. ”With our Blockage Simulator, we want to provide a tool that makes the physical processes inside the silo immediately transparent and understandable.”
The simulator functions as a digital twin of the problem: users can simulate typical failure scenarios and see in real time how material streams behave and where the structural weak points lie. As a result, the tool serves as an acute decision-making aid: it takes the anonymity out of the problem and translates complex bulk solids mechanics into a clear, visual diagnosis.
The Bridge to High-Tech Solutions
Once the problem is identified in the simulator, it also becomes clear why standard solutions fail. Under no circumstances should a blocked silo be entered by personnel – there is an immediate danger to life due to material engulfment or suffocation.
This is where TNT’s expertise comes into play. Based on the diagnosis prepared by the simulator, highly specialized, certified procedures are deployed:
- Rope-assisted vacuum suction technology: For the controlled removal of material from top to bottom, without requiring personnel to enter the danger zone.
- Blasting/Explosive cleaning: The surgical method for massive, rock-hard build-ups (e.g., in the cement or gypsum industry), where targeted, millimeter-precise micro-blasts break the blockage – completely safe for the silo structure.
- ATEX-compliant cleaning: Maximum safety in explosive dust environments (flour, sugar, coal).
Conclusion: Digitalization Meets Heavy-Duty Industrial Expertise
The Silo Blockage Simulator by TNT is more than just a technical gimmick on a website. It is an educational tool that helps plants set the right priorities in an emergency: safety and structural preservation over blind activism.
Understanding your silo’s dynamics saves valuable hours of downtime when it matters most – and protects the lives of your employees.
Want to find out what kind of blockage is threatening your silo? Test our simulator now, see the link under More information, if you have an urgent issue, request your express risk assessment right away.
