External desulfurization method for molten iron by magnesium bar

A technology for desulfurization of molten iron and magnesium rods is applied in the field of pretreatment outside the molten iron furnace, which can solve the problems of high cost, incomplete desulfurization and high stage cost, and achieve the effects of simple operation, rapid replacement and complete desulfurization

Inactive Publication Date: 2008-09-17
NANJING NANGANG IND DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

But this method is easily affected by the quality of magnesium particles, the desulfurization is not complete, and the cost of high-purity magnesium powder and magnesium particles is relatively high, which makes the stage cost of the desulfurization process too high, which is not conducive to the promotion of this technology

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, the method for desulfurizing molten iron outside the furnace, comprises the following steps:

[0024] The molten iron to be desulfurized is sent from the molten iron tank to the desulfurization station by train;

[0025] Metal magnesium rods are installed in the body of the desulfurization gun and connected to the hydraulic cylinder through a quick connection device;

[0026] Raise and rotate the desulfurization gun to the top of the molten iron tank;

[0027] Open the water cooling system at the lower part of the hydraulic cylinder;

[0028] Open the protection device of the desulfurization gun body and let the inert gas into it;

[0029] The desulfurization gun body descends to the predetermined position;

[0030] The hydraulic cylinder starts to work, and under the protection of inert gas, the night pressure lever pushes the magnesium rod in the desulfurization gun body into the molten iron tank, and the desulfurization reaction begins;

[0031] Whe...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
Inventor 王朝东黄晶吴小江刁岳川朱琨石东
Owner NANJING NANGANG IND DEV CO LTD
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