Magnesium wire feeding desulfurization device and method

Abstract

The invention relates to a magnesium wire feeding desulfurization device and method. The magnesium wire feeding desulfurization device comprises a wire feeding device and a rotatable stirring device, wherein the stirring device is arranged between the wire feeding device and a ladle and comprises a barrel, a left kinematic pair and a right kinematic pair; the left kinematic pair and the right kinematic pair are oppositely arranged on the outer wall of the barrel; the barrel comprises an inner barrel and an outer barrel; the inner barrel is fixed through a supporting frame; balls are installed on the inner barrel; the outer barrel is connected with the inner barrel through the balls; the outer barrel is in transmission connection with a driving motor and rotates outside the inner barrel; the left kinematic pair and the right kinematic pair comprise supports arranged on the outer wall of the barrel and rotating rods rotationally connected to the supports; a friction clutch is arranged at the tail end of the rotating rod of the left kinematic pair; a circular ring is arranged at the tail end of the rotating rod of the right kinematic pair; and a magnesium wire penetrates through the circular ring to enter the ladle. According to the magnesium wire feeding desulfurization device and method, the transmission and uniformity of magnesium in molten iron can be improved, the yield of the magnesium is improved, and the splashing of molten steel is reduced, so that an ideal molten iron pre-desulfurization effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting, and in particular relates to a magnesium feeding wire desulfurization device and method. Background technique [0002] Hot metal pre-desulfurization refers to the hot metal pretreatment process in which sulfur is removed from the hot metal before it is mixed into the steelmaking furnace. Pre-desulfurization of molten iron can reduce surface cracks and internal segregation of continuous casting slabs, improve impact toughness and plasticity of steel, improve welding performance and corrosion resistance of steel, etc. [0003] At present, the commonly used methods for desulfurization of molten iron in the metallurgical industry at home and abroad include the KR method, the magnesium powder injection method and the magnesium wire desulfurization method. The KR method involves mechanical stirring of the desulfurizer into the molten iron. The desulfurization reaction kinetics conditio...

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Problems solved by technology

But its disadvantage is that the refractory material layer on the outer layer of the lance tube in high-temperature molten iron is severely burned, which reduces the service life of the lance tube and high production costs; at the same time, the lance tube inserted into the depth of the molten iron will cause a large drop in the temperature of the molten iron; the nitrogen injected at the same time It also reacts with magnesium to consume part of the magnesium

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