The feasibility of the dilute phase positive pressure air-delivery system has been proved by design and practice of small scale high-temperature fluorite delivery. Also problems occurred during operating to carry out the solution are analyzed and adjusted. The material-gas mixture ratios, the velocities of the delivery flow and some other important design parameters have been recommended. It is clearly indicated that this technique used in the small scaled conveyance system has very high performance-price ratio, and it is operated simply, having expansion application value.