| 摘要 |
An apparatus and method sinters or partially sinters green pellets in a selected temperature range to make proppant particles as the green pellets pass between an electrical arc and a gas flowing in the vortex path and exit an underflow of a vessel. The vessel has an overflow disposed in a first end, an underflow disposed in a second end, a middle portion having a circular cross-section disposed between the first end and the second end, and a tangential inlet proximate to the first end such that a gas from the tangential inlet flows along a vortex path from the first end to the second end of the vessel. A first electrode extends through the overflow and a second electrode extends through the underflow. The electrodes are used to create the open electrical arc. One or more feed tubes extend through the overflow proximate to the first electrode. |
