Method for high-silicon molten iron desilication utilizing continuous casting cutting waste residue
A technology of molten iron and waste slag, applied in the direction of improving process efficiency, etc., can solve the problems of unfavorable stability control, great safety, production and quality accidents, high silicon content of molten iron, etc., and achieve the effect of being conducive to stable control and avoiding waste of environment and resources
Active Publication Date: 2019-02-22
ANGANG STEEL CO LTD
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Problems solved by technology
[0002] High silicon content in molten iron (silicon weight percentage higher than 0.5%) is not conducive to the stable control of the reaction in the converter blowing process, and there are major safety, production and quality accidents
At present, some iron and steel enterprises have advanced desiliconization technology for high-silicon molten iron, but the desiliconization operation generally uses purchased materials, which increases costs; in addition, the waste materials generated in the factory have not been used rationally, which not only pollutes the environment, but also causes waste of resources
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The present invention will be described in detail below, but it should be noted that the implementation of the present invention is not limited to the following embodiments.
[0018] The method for carrying out desiliconization of high-silicon molten iron by utilizing continuous casting cutting waste slag comprises the following steps:
[0019] 1) Recycling cutting waste:
[0020] The recovered continuous casting cutting waste residue is dried, and then put into the desulfurization silo for standby; the main component standard of continuous casting cutting waste residue: TFe: 65%-75%; Si≤3.2%.
[0021] 2) Requirements for desiliconization of molten iron
[0022] The Si weight percentage content in molten iron is above 0.50%, and the temperature is not lower than 1290°C;
[0023] The desiliconization operation is carried out on the molten iron to ensure the stability of the silicon composition of the molten iron into the furnace, which is beneficial to the smooth opera...
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The invention relates to a method for high-silicon molten iron desilication utilizing continuous casting cutting waste residue. The method comprises the following steps that (1), the continuous casting cutting waste residue is dried and fed into a desulfurization material bin; (2), molten iron is stirred adopting KR machinery to be subjected to desulfurization and thorough residue scraping, the weight percentage content of Si in the molten iron is 0.5% or above, and the temperature is not lower than 1290 DEG C; and (3), the adding amount of the continuous casting cutting waste residue is controlled according to the Si content of the molten iron. The method for the high-silicon molten iron desilication utilizing the continuous casting cutting waste residue has the advantages that the Si content in the molten iron can be reduced by 0.20-0.30%, meanwhile, reasonable use of waste materials generated in the continuous casting working procedure is also realized, environmental pollution and resource waste are avoided, and smooth control of the converter process is facilitated after the Si of the desilication molten iron is reduced.
Description
technical field [0001] The invention belongs to the field of high-silicon molten iron treatment, and in particular relates to a method for desiliconizing high-silicon molten iron by using continuous casting cutting waste slag. Background technique [0002] High silicon content in molten iron (silicon weight percentage higher than 0.5%) is not conducive to the stable control of the reaction in the converter blowing process, and there are large safety, production and quality accidents. At present, some iron and steel enterprises have advanced desiliconization technology for high-silicon molten iron, but the desiliconization operation generally uses purchased materials, which increases costs; in addition, the waste materials generated in the factory have not been used rationally, which not only pollutes the environment, but also causes Waste of resources. Contents of the invention [0003] In order to overcome the deficiencies of the prior art, the purpose of the present inv...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C21C1/04C21C7/04C21C1/02C21C7/064
CPCC21C1/02C21C1/04C21C7/04C21C7/064Y02P10/20
Inventor 高洪涛刘鹏飞王洪涛吴跃鹏陈宇李冰宋吉锁
Owner ANGANG STEEL CO LTD