| 摘要 |
Rotary hearth furnace for the treatment of minerals, comprising an annular chamber (1) provided with feeder means (4, 104) and discharge means (5, 105, 205) for the material, disposed adjacent one to another in a certain sector of the said chamber (1), a plurality of burners (111, 211) arranged all along the annular chamber (1) on the side walls (101) and on the top wall (201) thereof, means for extracting (3) the discharge gases, and means for transferring the gases from a first zone of the chamber downstream of the feeder means (4, 104) and upstream of the gas extraction means (3), with respect to the direction of rotation of said hearth (301), into a second zone upstream of the material discharge means (5, 105, 205) and downstream of the gas extraction means (3); said means for transferring are means for the forced conveying of the gases by suction at said first zone and by pressure delivery at this second zone; said means being provided with means for regulating the said forced conveying.
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