For premixed abrasive jet, abrasives loaded onto hermetic tank cannot enter the mixing chamber by use of negative pressure and weight and mix with water. A supply abrasive system of premixed abrasive jet was designed and the local flowing tributary was added. The test of supply abrasive and derust were carried. The test of supply abrasive shows the bigger the rate of water flow of the local flowing tributary, the bigger the rate of abrasive flow, and there is linear relation between with them. Regulate the rate of water flow of the tributary, abrasive flow may be controlled. The test of derust examined actual application of the supply abrasive system, and effects of the parameters of abrasive jet on derust performance. The results show the abrasive weight consistency and the flow rate are good. The parameters of abrasive jet are determined, the work pressure is 10MPa, the abrasive weight consistency is 30%, the rate of water flow is 30L/min.
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