Slag conglomerating and skimming method and device

Abstract

The invention relates to the field of molten iron pretreatment desulfurization processes, in particular to a slag conglomerating and skimming method and a device. The slag conglomerating and skimming method sets a traveling wave magnetic field; the phase of the magnetic field is controlled to enable the moving direction of molten iron driven by the traveling wave magnetic field to point to a ladle port; the traveling wave magnetic field enables the molten iron to flow to the ladle port under the effect of electromagnetic force, so that molten iron slag is conglomerated in the ladle port; and when the conglomerated molten iron slag is higher than the ladle port, the molten iron slag can overflow a ladle to enter a slag receiving tank so as to realize the ladle slag skimming. The slag conglomerating and skimming device comprises an electromagnetic winding and the slag receiving tank; the electromagnetic winding is arranged above the ladle; the magnetic force line of a magnetic field generated by the electromagnetic winding is pointed to an area of the ladle port; and the slag receiving tank is arranged below the ladle port. The slag conglomerating and skimming process is finished under non-contact conditions without generating the molten iron oscillation phenomenon; the molten iron nearly has no loss; the precise slag conglomerating and skimming operation is realized without polluting the molten iron; and the ton steel energy consumption can be reduced.

Description

technical field [0001] The invention relates to the field of molten iron pretreatment desulfurization technology, in particular to a method and device for removing slag from a molten iron ladle. Background technique [0002] The molten iron pretreatment desulfurization process produces a large amount of molten iron pretreatment slag, and the molten iron needs to be treated with ladle slag removal before entering the converter steelmaking process. The traditional first-generation slag removal method uses a reciprocating mechanical mechanism to remove slag. This method has the following main problems: (1) A slag rake is installed at the front end of the mechanical slag remover. Generally, the slag rake must be submerged in the molten iron, which is very difficult. It is difficult to control the submersion depth of the slag rake, and the reciprocating slag rake is likely to have a turbulent effect on the molten iron due to the large inertia of motion, causing the molten iron to...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method and device for collecting slag and removing slag. This solution uses the driving force of the traveling wave magnetic field on the molten iron to make the molten iron slag floating on the upper layer of the molten iron gather at the mouth of the molten iron ladle and automatically overflow out of the molten iron ladle. Slagging operation; the whole process of slagging and slagging is completed under non-contact conditions, which solves the defects of low slagging efficiency and high loss rate of molten iron caused by the large motion inertia of the mechanical slagging machine in the prior art ; At the same time, the non-contact slag removal operation does not have any external devices entering the molten iron, which will not pollute the molten iron, and also avoids the disadvantages of the existing technology that the heat dissipation of the molten iron caused by nitrogen injection, etc., improves the energy consumption per ton of steel

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