Nutec Bickley rotary kilns for carbon reactivation offer a very efficient way to clean activated carbon so that it can be reused. The kiln is based on the successful GFC design already used throughout the gold mining industry.
Nutec Bickley rotary kilns for carbon regeneration are furnished with a complete control system which will permit kiln operators to regulate all of the kiln parameters, such as carbon feed rate, process temperatures, steam flows, kiln pressure etc.
These kilns can be monitored remotely and Industry 4.0 trend monitoring can be incorporated.
The carbon is indirectly heated inside a 253 MA alloy drum that has a variable rotary kiln speed for different carbon feed rates and residence times.
To aid with the carbon reactivation process and to avoid any oxygen infiltration, process steam is injected through the drum at the kiln exit end.
These kilns can be equipped with either a carbon preheater or a heat recovery system to ensure the lowest possible energy usage.
Both the entry and the exit of the drum are supplied with a spring-loaded rotary seal with a graphite impregnated seal medium and with an improved labyrinth system to stop the superelastic carbon from bouncing into the seal face and causing grinding and premature failure of the seal.
In our carbon regeneration kilns we have the ability to run at higher temperatures so that organic contamination is removed more efficiently. Regenerated carbon is very close to virgin carbon activation levels after treatment.
Our carefully controlled pressure steam atmosphere ensures that treatment takes place without burning or damaging the carbon.
We use deep heat transfer blades within the drum to more effectively transfer heat into the carbon. This provides higher carbon bed depths for increased capacities
Nutec Bickley carbon regeneration kilns are a highly specialized line and are solely used in the gold mining industries.
With our SCADA systems, the kiln operators are able to have complete control of their firing process, enhancing efficiency and productivity. Our latest Industry 4.0 developments integrate the latest technology to not only monitor the process, but also to keep the kiln operating in its peak performance with smart maintenance technology. All the data generated during the firing process is stored in our SCADA system, which then is used to generate reports, graphs and intelligence data, to help customers in their decision making process.
Nutec Bickley heat transfer blades gently transfer heat to the carbon and move it through it through the heating tube. This is a gentle process that does not damage the carbon.
Our kiln system cools down the carbon with a quench tube, reducing the carbon temperature down to 250°C (480°F), in order to avoid thermal shock as the carbon is dropped into a quench tank for final cooling.
The steam is in turn superheated and it flows into the drum exit end to provide a very efficient supply of the process steam which both aids the regeneration and keeps the pressure controlled, to inhibit oxygen ingress. The steam flow can be adjusted.
Nutec Bickley rotary kilns for carbon reactivation are furnished with a complete control system which will permit kiln operators to regulate all of the kiln parameters, such as carbon feed rate, process temperatures, steam flows, kiln pressure etc.
An afterburner system can be incorporated to comply with environmental requirements.
High Carbon Reactivation Rates and Improved Gold Recovery Rates.
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