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Ladle slag removal agent, preparation method and use method

A technology of slag removal agent and slag agent, which is applied in the field of iron and steel metallurgy, can solve the problems of reducing the limited capacity of the ladle, residue, and the ladle slag is not easy to adhere to the wall of the ladle, so as to improve the service life and operation efficiency, extend the online use time, The effect of shortening the slag cleaning treatment time

Inactive Publication Date: 2014-03-19
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]At present, ladle refining has become an essential link in the production of high-quality special steel. The ladle refining process needs to create reducing slag in the ladle for diffusion deoxidation and desulfurization, and the molten steel The deoxidized product and the mixed slag from the tapping process of the steelmaking furnace also remain in the upper part of the ladle and become ladle slag. It is difficult to pour out, and there will be a lot of slag remaining on the bottom and inner wall of the ladle. If it is not cleaned in time, it will seriously affect the quality of the next ladle of molten steel, reduce the limited capacity of the ladle, and affect the operating rate and life of the ladle; Therefore, the slag in the ladle needs to be cleaned up in time. At present, mechanical slag removal is mostly used, but mechanical slag removal is easy to damage the refractory material of the ladle, and the efficiency is not high
[0003]On the other hand, China is rich in boron resources. After extracting borax by the carbon-soda method, a large amount of waste boron mud is produced. Due to the boron, iron, magnesium, etc. in the boron mud All belong to lean ore, the extraction cost is too high, and the treatment process is complicated. At present, China still lacks an industrialized method for comprehensive utilization of waste boron mud with high added value. The main composition of boron mud powder after dehydration is: MgO 24~40%, SiO2 20~35%, B2O3 2~4%, Al2O3 2~4%, Fe2O3 2~4%, CaO 2-10%, of which CaO, MgO, SiO2, Al2O3, B2O3, etc. are all components that will be used in metallurgy , therefore, boron mud can be considered as a metallurgical auxiliary material to be applied
[0004]According to the composition and performance characteristics of slag that is difficult to clean up such as easy-to-adhesive slag and easy-to-crust slag in the ladle, by adding a certain substance or composition into the ladle , so that the ladle slag is not easy to adhere to the ladle wall, and it is not easy to crust, and it can be poured out from the ladle smoothly when the ladle is cleaned, which will be the best way to solve the current ladle wall sticky slag and ladle slag accumulation; technology, there is no relevant report on realizing ladle slag removal by slag adjustment and slag conversion

Method used

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  • Ladle slag removal agent, preparation method and use method
  • Ladle slag removal agent, preparation method and use method

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Adopt the poor manganese ore powder of Mn 10%, and batching composition is calculated as follows by mass percentage:

[0036] Manganese ore powder 40%, hematite powder 40%, boron mud 18%, glucose 2%.

[0037] Weigh the manganese ore powder, boron mud powder, and hematite powder, mix them according to the proportion, and then mix them on the roller mill. During the mixing process, add water with a mass fraction of 5% of the solid material by spraying to adjust the humidity , after the glucose powder is dissolved in water to make a 50% solution, it is added during the humidity control process; then, it is pressed into balls by a ball press machine, the particle size of the balls is 4-5cm, and the balls are dried at 200°C for 4 hours, Then after cooling, the finished product is packaged.

Embodiment 2

[0039] Adopt the manganese ore powder of Mn 20%, batching composition is calculated as follows by mass percentage:

[0040] Manganese ore powder 45%, hematite powder 35%, boron mud 18%, glucose 2%.

[0041] Weigh the manganese ore powder, boron mud powder, and hematite powder, mix them according to the proportion, and then mix them evenly on the roller mill. During the mixing process, add water with a mass fraction of 6% of the solid material by spraying to adjust the humidity , after the glucose powder is dissolved in water to make a 50% solution, it is added during the humidity control process; then, it is pressed into balls by a ball press machine, the particle size of the balls is 4-5cm, and the balls are dried at 200°C for 4.5 hours , and then packaged after cooling to obtain a finished product.

Embodiment 3

[0043] Adopt the manganese ore powder of Mn 25%, batching composition is calculated as follows by mass percentage:

[0044] Manganese ore powder 50%, hematite powder 30%, boron mud 18%, glucose 2%.

[0045] Weigh the manganese ore powder, boron mud powder, and hematite powder, mix them according to the proportion, and then mix them on the roller mill. During the mixing process, add water with a mass fraction of 5.5% of the solid material by spraying to adjust the humidity , after the glucose powder is dissolved in water to make a 50% solution, it is added during the humidity control process; then, it is pressed into balls by a ball press machine, the particle size of the balls is 4-5cm, and the balls are dried at 200°C for 4.5 hours , and then packaged after cooling to obtain a finished product.

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Abstract

The invention relates to the technical field of ferrous metallurgy, in particular to a ladle slag removal agent, a preparation method and a use method. The ladle slag removal agent comprises 40-60% of manganese mineral powder, 10-20% of boric sludge powder, 20-40% of hematite powder and 1-2% of an organic binding agent; the preparation method is characterized by comprising steps of burdening, mixing, grinding, ball pressing, oxidation drying, cooling package and the like; and the use method is characterized in that the ladle slag removal agent is directly fed into a ladle after ladle steel pouring is finished and off line, the fed amount of the slag removal agent accounts for 5-10% of the weight percentage of the slag residue amount in the ladle, and deslagging is finished in 5-20 minutes after the slag removal agent is added. According to the ladle slag removal agent, the preparation method and the use method, slag bonded in the ladle can be cleaned conveniently, weight increment of the ladle is controlled, the working performance and the available capacity of the ladle are improved, and the service life of the ladle can be prolonged.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a ladle cleaning agent, a preparation method and a use method. Background technique [0002] At present, ladle refining has become an essential link in the production of high-quality special steel. The ladle refining process needs to create reducing slag in the ladle for diffusion deoxidation and desulfurization, and the products of molten steel deoxidation and mixed slag during the tapping process of the steelmaking furnace are also retained. In the upper part of the ladle, it becomes ladle slag. After the molten steel in the ladle is poured, the slag remaining in the ladle will crust due to the temperature drop. If it is not cleaned in time, it will seriously affect the quality of the next ladle of molten steel, reduce the limited capacity of the ladle, and affect the operation rate and life of the ladle; therefore, the residue in the ladle needs to be cleaned...

Claims

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Application Information

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IPC IPC(8): B22D43/00
Inventor 李桂荣王宏明
Owner JIANGSU UNIV