Device and method for calcining oxidized pellets aerobically

Abstract

The invention relates to the field of ferrous metallurgy and discloses a device and a method for calcining oxidized pellets aerobically. The device comprises a base, at least one furnace body supporting plate, a furnace body, a silicon carbide tube heater, an outer corundum protecting tube, an inner corundum protecting tube and a high-temperature specimen container. The furnace body supporting plates are vertically arranged on the base, the furnace body is mounted on the furnace body supporting plates, the outer corundum protecting tube is vertically arranged at the bottom of the furnace body,the silicon carbide tube heater is vertically arranged on the inner side of the outer corundum protecting tube, and the high-temperature specimen container is detachably mounted on the inner side ofthe inner corundum protecting tube and comprises a specimen container supporting plate, a specimen thermocouple tube and a high-temperature container. The device can guarantee that a specimen is heated in a ventilating state, so that the specimen is in air all the way, and therefore, an oxidative atmosphere is supplied sufficiently; therefore, the content of FeO in prepared pellets is reduced, anda reliable ground and guidance can be provided for industrial production.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a device and method for aerobically roasting and oxidizing pellets. Background technique [0002] Pellets are mixed with iron-containing concentrate powder and binder in a certain proportion, and then made into green balls with a diameter of 8-15mm in a pelletizer, and then dried, roasted and consolidated to form a pellet with good Iron-containing raw material with excellent metallurgical properties, used for blast furnace smelting. The main process of pellet production includes raw material preparation, batching, mixing, pelletizing, drying, preheating, roasting and cooling. Pellet products have been used in steelmaking and direct reduction ironmaking. Compared with sinter, pellets have better metallurgical properties, uniform particle size, more micropores and good reducibility, and a large number of popularization and use are conducive to strengthening blast furnace ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of insufficient oxygen supply and high content of FeO in the pellets during the roasting process due to the closed heating method existing in the prior art, and to provide a method for aerobic roasting and oxidation of pellets. Device and method

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