| 摘要 |
A horizontally disposed helical coil is positioned around and in communication with a hollow horizontal shaft extending lengthwise of a tank having oppositely disposed inlet and outlet ports. Hot oil is directed into the hollow shaft and circulated through the helical coil and a device rotates the hollow shaft and helical coil so that pieces of solidified coal tar or a similar material introduced through the inlet port of the tank and directed into the helical coil are simultaneously melted, agitated, and conveyed thereby toward the outlet port.
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