Apparatus for heat treating a particulate material

Details Apparatus for heat treating a particulate material Apparatus for heat treating a particulate material

1993-10-08

1995-01-17

Kastler, Scott

Metallurgical apparatus

Means for melting or vaporizing metal or treating liquefied...

Means to melt and separate metal from mass of diverse...

266173, 266213, 432112, F27B 708

Patent

active

053820029

ABSTRACT:
An apparatus for heat treating particulate material containing a combustible contaminant. The particulate material is fed into the upstream end of a rotary drum and is conveyed toward the downstream end of the drum. A fixed first tubular member is disposed concentrically within the downstream end of the drum and includes a small diameter inlet section and a larger diameter outlet section. A fuel burner is located within the small diameter end of the first tubular member and combustion gases from the burner travel through the first tubular member to the larger diameter outlet section where the gases expand and are cooled. The gases are then discharged into the upstream end of the drum into contact with the particulate material to vaporize the combustible contaminants. A second tubular member is mounted in radially spaced relation between the first tubular member and the downstream end of the drum to provide inner and outer annular chambers. The vaporized contaminants pass through the inner annular chamber in heat transfer relation with the high temperature section of the first tubular member, thereby providing complete combustion of the contaminants, while the particulate material travels to the downstream end of the drum through the outer annular chamber where it is subjected to a lower temperature which will not adversely effect the particulate material.

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