External desulfurization method for molten iron by magnesium bar

Abstract

The method comprises the following: fixing the magnesium stick on the desulfuration gun body; with the protection of cooling system and inactive gas, inserting the magnesium stick into iron water; when one magnesium stick disappearing, changing another one. The specific operation is following: installing magnesium stick in the desulfuration gun body, hydraulic heaver putting the desulfuration gun body into the iron water, carrying out desulfurization; changing the new magnesium stick when the last one used out; repeating the above steps until the desulfuration ending. The method overcomes the defects of conventional art, and has the advantages of low cost and simple operation.

Description

technical field

[0001] The invention belongs to the technical field of pretreatment outside a molten iron furnace, and relates to an improvement method for a desulfurization process, in particular to a method for desulfurizing molten iron outside a furnace using magnesium rods. Background technique

[0002] Desulfurization outside the hot metal furnace is one of the commonly used technologies in the metallurgical industry. The existing desulfurization technologies outside the hot metal furnace are as follows:

[0003] Limestone desulfurization, also known as KR desulfurization;

[0004] Magnesium powder plus lime desulfurization;

[0005] Simply using magnesium powder for desulfurization is to use the protection of inert gas to spray passivated magnesium particles into the molten iron tank to achieve the purpose of desulfurization. But this method is easily affected by the quality of magnesium particles, desulfurization is not complete, and the cost of high-purity magnesiu...