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Silo Cleaning - Isn't it time to recognise the risks?

As many cement plants will testify, cleaning cement and raw meal silos can be a dangerous, time consuming, costly and tricky job. Nowadays, most cement plants try to emphasize and enforce stringent safety policies. A demand for SAFE silo cleaning has long been overdue.
Despite a growing awareness that safety is a major factor when performing a silo cleaning task, there are still cases whereby cement plants have chosen to ignore the huge risks involved in undertaking such activities. In some instances, the danger posed to workers is so serious that innocent lives have been lost.  With that in mind, cement plants must recognise that silo cleaning is a highly professional job that needs to be performed by qualified specialists who are able to minimise the exposure to risks posed to human lives, by incorporating skill, experience and technology.

In many cases, the discharge area of the silo provides one of the biggest challenges in silo cleaning. Loose material has to be removed from the silo first and huge lumps of hardened cement are commonly found blocking the passageway during the extraction of material from the silo. In the past, the only available solution was to either pump compressed air through an improvised opening at the discharge gate, or by completely removing the discharge chutes itself. However, neither method has been proven to be effective or efficient.


  • Cardox's silo cleaning team are independently certified and trained to work in Confined Space.
  • Cardox's silo cleaning services and equipment are ranked among the best in the World.
  • The people in our team has successfully completed projects for clients across a spectrum of industries, Globally.
  • We pride ourselves with a zero accident record by achieving a high standard in safety and consideration for lives, property and the environment.

Besides providing silo cleaning services on a turnkey basis, Cardox also has the ability to source, train, setup and operate silo cleaning equipment such as silo whips and Cardox for clients who prefer to embark on the job themselves. In such cases, Cardox Global Services can provide a variety of training solutions that is specifically designed to suit your requirement.

Our ability in silo cleaning extends to materials such as:

  • Cement
  • Sugar
  • Powder
  • Gypsum
  • Animal Feed
  • Dust
  • Grain
  • Coal
  • Ash
  • Flour
  • Fertilizer
  • Aluminum
  • Maize
  • Catalyst
  • Zinc
  • Soybean
  • Ore
  • Lime


The scope of our silo cleaning service and training program, outlines essential details such as:

  • Silo and material inspection
  • Assessment of existing openings in the silo
  • Silo cleaning and blockage clearing procedure
  • Silo build-up causes and prevention
  • Material recovery and minimize material loss or wastage
  • Confined space techniques
  • Silo evacuation procedure
  • Safety and risk assessment
  • Silo cleaning and blockage clearing techniques using silo whips & Cardox


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What is Cardox?

Cardox is a versatile equipment that is used in a diversity of industries as an effective solution for the removal build-up, blockage clearing, unclogging harden materials as well as in rock excavation.

Cardox consists of a high-strength reusable steel tube filled with liquid carbon dioxide (CO2) that is energized with a small electrical charge. Expanding up to 600 times the original volume, the CO2 is released through a discharge nozzle, creating a powerful pushing force reaching pressures up to 27,000 & 34,000 psi. More than three tons of blockages can be dislodged by a single blast in milliseconds.



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What are silo whips?

Silo whips are either powered by air or hydraulics and controlled from the top of and outside the Silo, which eliminates the need for people to enter the silo. With Health and Safety in mind, this method is the a safe alternative when performing silo cleaning without entering the silo.

The whipping head is suspended inside the silo, but operated remotely from the silo top, the silo whip efficiently clears build-up using an air-driven or hydraulic rotary cutter, with a 360 degree rotation and an operating depth of up to 50 meters. A range of cutters are used depending on the type of material to be cleaned. Cleared material simply falls to the base of the silo for extraction.



The Cardox System is both versatile and safe for silo cleaning, clearing of build-up, blockages and rock excavation. It has been proven to many as the most EFFICIENT, RELIABLE and COST EFFECTIVE method used today.

The SiloWhip System is the MOST POWERFUL silo whip in the world. Although it is purposely build to take on the hardened build-up commonly found in cement and clinker silos, it is GENTLE enough to clean out other materials.

Contact us today, to find out how we can help you with our complete range of products, services and solutions to tackle your problems.

With a presence in over 40 countries worldwide, we're closer to you.





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About Us
Our History
Our Operations
Frequently Asked Questions

How Cardox System works
Silo Cleaning & Silo Blockage Clearing
Cardox against other methods
Case Study : Lafarge Malaysia I
Case Study : Lafarge Malaysia II
Case Study : Argos Colombia
Build-up & Blockage Clearing

Cardox against other methods
Where is Cardox used?
Case Study : Cemex Philippines
Case Study : Cima Malaysia
Case Study : Holcim Vietnam
Case Study : Holcim Russia
Case Study : Heidelberg Indonesia
Case Study : QNI Australia
Case Study : FMI Peru
Case Study : ExxonMobil Nigeria
Case Study : Argos Colombia
Rock Excavation

The alternative to explosives
Rock breaking methods
Case Study : Tunnel Excavation I
Case Study : Tunnel Excavation II
Case Study : Tunnel Excavation III
Case Study : Rock Excavation I
Case Study : Rock Excavation II
Case Study : Rock Excavation III
Case Study : Rock Excavation IV
Case Study : Rock Excavation V
Case Study : Underwater Excavation I

How SiloWhip System works
Silo Whip - Hydraulic or Pneumatic?
Case Study : Cemex Philippines
Case Study : Holcim Malaysia

Silo Cleaning Introduction
Silo Cleaning Method
Airslide Replacement & Maintenance
Build-up & Blockage Clearing
Rock Breaking
Rope Access


International Conference on Deep Excavations
5th Global Cement Conference Asia
22nd AFCM Technical Symposium
1st Cardox Distributor Summit (Kuala Lumpur)
2nd Cardox Distributor Summit (London)

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