工业纯铁铝氧含量控制工艺

doi:10.13228/j.boyuan.issn1006-9356.20230279

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Abstract In order to reduce the wire breakage rate during drawing of high carbon steel wire rods for diamond core wire, control the content of aluminum oxide inclusions, and provide pure iron that meets the requirements, control process of aluminum and oxygen content in industrial pure iron was studied. Using vacuum induction furnace and dual furnace smelting process, for the first heat, two smelting schemes were designed to remove aluminum through the oxygen aluminum reaction.The influence of furnace pressure before adding iron oxide and the addition amount of iron oxide on the aluminum and oxygen content in pure iron liquid were studied.The results show that when the addition amount of iron oxide is 300 g and the furnace pressure before adding iron oxide is 0.1 MPa, the aluminum mass fraction in pure iron liquid can be reduced to within 0.001%. The second heat is deoxidized through carbon oxygen reaction.The effect of carbon addition amount on the content of aluminum oxygen in pure iron liquid was studied. The results show that when the carbon addition amount is 0.03%, the aluminum mass fraction in pure iron liquid decreases to within 0.002% and the oxygen mass fraction decreases to within 0.001%. Statistical analysis was conducted on the inclusion of samples. It is found that the number and size of inclusions in pure iron through oxygen dealumination and low carbon deoxidation processes are significantly decreased with no inclusions larger than 10 μm, while inclusions containing aluminum oxide basically disappear. However, high carbon deoxidation is adverse to the removal of inclusions. This process provides raw materials with low aluminum, low oxygen, and low inclusion levels for high-quality diamond core wire enriching the purification technology of industrial pure iron.

Key words： vacuum induction furnace pure iron Al O inclusion diamond core wire

Received: 04 May 2023

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	LIU Jianmin
	JIANG Caiwei
	HU Xianjun
	GU Ye

Cite this article:

LIU Jianmin,JIANG Caiwei,HU Xianjun等. Control process of Al and O content in industrial pure iron[J]. China Metallurgy, 2023, 33(9): 87-95.

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http://www.zgyj.ac.cn/EN/10.13228/j.boyuan.issn1006-9356.20230279 OR http://www.zgyj.ac.cn/EN/Y2023/V33/I9/87

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