高铁赤泥碳热还原制备镍铁合金

doi:10.19976/j.cnki.43-1448/TF.2021042

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Abstract Ferro-nickel alloy was prepared by direct reduction at high temperature with Bayer process using high iron red mud and laterite nickel ore as raw materials and coke powder as reducing agent. The effects of different reduction conditions on the reduction process of red mud and laterite nickel ore were studied by analyzing and testing the alloys and residues prepared at different temperatures, reducing agent ratio and additive ratio. The results show that the reduction yield of the alloy increases with the increase of the coke powder contents of reducing agent. When the addition ratio of coke powder is 30% and the reduction temperature is 1 550 ℃, the total recovery of the iron alloy reaches 89.6%. With the addition of additives CaO and Na₂CO₃, the separation effect of metal and slag is significantly improved. When the addition ratio of Na₂CO₃is 6%, the nickel in laterite nickel ore will be reduced completely to the alloy. The retained austenite decreases and then transforms into martensite and improves the Rockwell hardness to 52.5.

Key words： high-iron red mud laterite nickel ore iron alloy carbothermal reduction ferro-nickel alloy

Received: 05 April 2021 Published: 22 December 2021

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	SUN Kai
	WANG Wei
	ZHANG Ziyang
	ZHU Guang

Cite this article:

SUN Kai,WANG Wei,ZHANG Ziyang, et al. Preparation of Ni-Fe alloy by carbothermal reduction of high iron red mud[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(6): 560-566.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2021042 OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I6/560

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