| 摘要 |
<p>An apparatus and method for heating and drying stone aggregate used in the production of asphalt, which also remediates and disposes of contaminated soil. Aggregate is introduced into a drum chamber (36) of a fixed sleeve rotary drum mixer (34) for heating. The aggregate is discharged into an annular chamber (70) and mixed with contaminated soil that has been processed to be suitable for use in asphalt. As the soil is heated, the contaminants are vaporized and drawn into the drum chamber (36) where they are oxidized by high temperature. Secondary aggregate in the form of recycled asphalt pavement (RAP) and/or virgin aggregate are also added to the annular chamber (70) and mixed with the aggregate and soil to form asphalt and to cool the aggregate/soil mixture.</p> |
