초록 ▼

Continuous asphalt plant including a temperature control system for controlling the temperature of the asphalt-aggregate mix by varying the flow of hot gases through a mixing enclosure. The temperature of the source of heat, such as a flame burner, is controlled to maintain the temperature of the ho

Continuous asphalt plant including a temperature control system for controlling the temperature of the asphalt-aggregate mix by varying the flow of hot gases through a mixing enclosure. The temperature of the source of heat, such as a flame burner, is controlled to maintain the temperature of the hot gases as they enter the mixing enclosure, and the hot gases are recirculated to assist in controlling the temperature of the hot gases entering the mixing enclosure and to provide more efficient operation of the plant.

대표청구항 ▼

In an apparatus for producing asphalt-aggregate material including means for mixing asphaltic raw materials in a mixing enclosure, means for continuously admitting asphaltic raw materials into said mixing enclosure, means for continuously withdrawing asphalt-aggregate material from said mixing enclo

In an apparatus for producing asphalt-aggregate material including means for mixing asphaltic raw materials in a mixing enclosure, means for continuously admitting asphaltic raw materials into said mixing enclosure, means for continuously withdrawing asphalt-aggregate material from said mixing enclosure, a variable heat source for providing high temperature gases, and means for admitting said high temperature gases into said mixing enclosure, the improvement comprising: means for diluting said high temperature gases with dilution gases prior to admittance of said gases to said mixing enclosure; means for withdrawing said high temperature and dilution gases from said mixing enclosure; means for sensing the temperature of said asphalt-aggregate material as it is being withdrawn from said mixing enclosure; and means, responsive to variations in the temperature of said asphalt-aggregate material as said material is being withdrawn, for varying the rate of flow of said high temperature and dilution gases through said mixing enclosure to maintain said material as it is withdrawn at a first predetermined temperature while maintaining the temperature of said high temperature and dilution gases being admitted into said mixing enclosure at a second predetermined temperature.