A slag secondary granulation rotor

Abstract

The invention provides a secondary pelletization rotor for a slag, belonging to the technical fields of metallurgy and power machinery. An axisymmetric rotor body is formed by fixed connection of a volute disc, a bearing seat, a transition disc, a hollow pipe, a nozzle and a bracket, and the axisymmetric rotor body is supported on a static fixed shaft through a bearing and can rotate around a fixed shaft; and a turbine, a screw rod and a gear are fixedly connected to form an axisymmetric rotating body, the rotating body is supported on the bearing seat through the bearing and can rotate alongthe axis of the rotating body relative to the rotor body. A high-temperature mixture formed by water, slag and steam enters the volute disc from an inlet, is collided with fixed blades in a volute andradial blades of the turbine, is changed to move along the axial direction of the screw rod and is finally sprayed out from the nozzle at the lower part of the body so as to work outside, and meanwhile, kinetic energy absorbed by the turbine works outside through the gear. The secondary pelletization rotor is key equipment for changing an existing slag pelletization process, the utilization rateof waste heat energy of the slag is high, the pelletization effect is good, the equipment structure is compact, and the secondary pelletization rotor has important application prospects in the pelletization of the slag.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and power machinery, and in particular relates to a slag secondary granulation rotor. Background technique [0002] A large amount of high-temperature waste slag is produced in the process of iron and steel metallurgy, mainly blast furnace slag and steel slag (referred to as slag). Among them, the temperature of blast furnace slag is about 1450°C, and its enthalpy is about 1700MJ / t; the temperature of steel slag is about 1450-1650°C, and its enthalpy is about 1670MJ / t. They are high-quality waste heat resources and have high recovery value. . The blast furnace slag forms a crystal phase when it is cooled slowly, and forms a glass phase when it is rapidly cooled. The glassy blast furnace slag obtained by the rapid cooling treatment has good hydraulic activity and can be used as a cement raw material. Therefore, most of the blast furnace slag adopts the water quenching granulation process (refe...

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Problems solved by technology

Therefore, most of the blast furnace slag adopts the water quenching granulation process (referred to as the water quenching method), such as the Rasa method, the INBA method and the Tyna method, etc., corresponding to the slag treatment of these processes Although the equipment is simple in structure and low in investment, it can meet the slag processing capacity requirements of blast furnace production, but there is a large consumption of fresh water, the waste heat of slag cannot be recovered, and the system maintenance workload is large; during grinding, wet slag drying still consumes energy, etc. question

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