The Optimal Physical Treatment Process for Production of High-grade Iron Concentrate from Waelz Kiln Slag

Yosep Han; Seongmin Kim; Seongsoo Han; Youngjae Kim

doi:10.7844/kirr.2023.32.2.3

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2023 Vol.32, Issue 2 Next Page

Research Paper

The Optimal Physical Treatment Process for Production of High-grade Iron Concentrate from Waelz Kiln Slag Waelz Kiln 슬래그로부터 고품위 철 농축산물의 생산을 위한 최적 물리적 처리공정

30 April 2023. pp. 3-11

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Abstract

The aim of this study was to develop a physical treatment method for obtaining iron concentrate with a grade higher than 60% from slag generated in the Waelz Kiln (WK) process. The size of the WK slag used in this work was several millimeters, with T-Fe and ZnO contents of 40.24% and 1.03%, respectively. The slag samples were pulverized in a laboratory rod mill for various grinding times, followed by a magnetic separation test under a low magnetic intensity of 0.05 T initially. The results showed that the highest iron grade was obtained from samples with a grinding time of 10 min. Additionally, for a grinding time of 20 min, the highest grade and recovery ratios were achieved at a magnetic intensity of 0.8 T. Based on these findings, the optimal physical treatment process proposed in this study resulted in iron concentrates with a grade of 61.34% and an enrichment ratio of 1.52.

Keywords

Waelz Kiln slag

physical treatment

iron concentrate

grade

본 연구에서는 Waelz Kiln(WK) 공정에 의해 발생되는 슬래그로부터 물리적 처리에 의해 60% 이상의 품위를 가지는 철 농축산물을 얻고자 하였다. 대상 WK 슬래그는 수 mm 크기의 조립자로서 슬래그의 T-Fe 함량은 40.24%, ZnO 함량은 1.03%으로 확인되었다. WK 슬래그는 실험실 로드밀을 이용하여 다양한 분쇄시간 동안 분쇄하였으며, 분쇄된 시료는 우선 저자력(0.05 T) 세기에서 선별되었다. 그 결과, 10분 분쇄된 시료에서 가장 높은 철 품위를 나타내었으며, 20분 분쇄시료를 대상으로 자력세기에 따라 실험한 결과, 보다 고자력인 0.8 T에서 가장 높은 품위 및 최고 수준의 회수율이 관측되었다. 앞선 결과들을 바탕으로 본 연구에서는 최적의 관련 물리적 처리공정을 제안하였으며, 최적 공정에 의해 얻어진 철 농축산물의 품위 그리고 농축율은 각각 61.34% 그리고 1.52으로 평가되었다.

키워드

Waelz Kiln 슬래그

물리적 처리

철 농축산물

품위

References

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 32
No :2
Pages :3-11
Received Date : 2023-01-21
Revised Date : 2023-04-12
Accepted Date : 2023-04-13
DOI :https://doi.org/10.7844/kirr.2023.32.2.3

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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