TURBIN MIXER CONTROLS THE HEAT.
Preparing cement kiln dust (CDK) for landfill requires a balanced approach of correctly hydrating the mix while also carefully managing the resulting chemical reaction. With these variables in mind, a cement manufacturer contracted DustMASTER to develop a system for safely stabilizing these high-alkaline residuals.
DustMASTER began by conducting manual testing of the CKD, monitoring and recording the moisture percentage being added by weight. We specified our 200 TPH Series I mixing system, which contains many advanced features, including a Turbin style pan mixer, hydraulically operated discharge door, material weigh hopper, metered water system and control with ca programmable controller which has 100% manual override and load cell readout.
The Turbin mixer can slow the cycle time down and mix through the chemical reaction while dust and water are added in proportion to quench the rise in temperature. Batch mixing and system controls allow mixing and discharge times to be set initially and adjusted as necessary.
When testing was complete, the CKD from the mill was converted to a final product that was dust free, with 25% water addition and a 120-second cycle time. Some steam and heat of hydration were present, and the formed ball-like material and all fines were wetted thoroughly. The CKD was acceptable for transportation and landfill disposal.
Determine if a DustMASTER system could successfully process water with the CKD to achieve a dust-free product for landfill disposal.
DustMASTER 200 TPH Series I batch mixing system with water metering
- Turbin style pan mixer with hydraulically operated discharge door
- Material weigh hopper
Metered water system and control
- Programmable controller with 100% manual override and load cell readout
Moisture percentage addition by weight to determine optimum proportion
One week for testing and documenting results
Final product was dust free, with 25% water addition and a 120-second cycle time. Some steam and heat of hydration present. The ball material and all fines were wetted thoroughly. The CKD was acceptable for transportation and landfill disposal.