Adhesion prevention nozzle null to atomization roasting nozzle

摘要

PURPOSE: To eliminate a vortex on the tip of a spray calcining nozzle and also to prevent solid matter generated from solution from being stuck on the tip by forming the tip of a two-fluid spray calcining nozzle into a streamline and separately disposing a gas outflow pass outside the tip. ;CONSTITUTION: In a spray calcining nozzle, a metal oxide solution mixture feeding pass 8 is disposed in the center of a nozzle 7, and is connected to a desiliconization tower, a heat recovery tower, etc., which are a process for concentrating a raw material of solution mixture of metal oxide, recovering impurities, etc. The nozzle body 7 has a gas outflow pass 9 so as to enclose the front outer peripheral surface of the solution mixture feeding pass 8. From the gas outflow pass 9, gas is caused to flow out so as to enclose solution mixture sprayed from the center of the tip of the nozzle. In this case, the tip 10 of the spray calcining nozzle (nozzle tip) is formed into a streamline tapering off. In this way, the area of a vortex generated when gas flows out at a high speed is reduced, and also by forcibly causing the gas to flow in the vortex area, the generation of the vortex is prevented.;COPYRIGHT: (C)1995,JPO