Effect of Salt Roasting Factors on Water Leaching of Vanadium Concentrate by Design of Experiment

Min-seuk Kim; Kyeong-woo Chung; Rina Kim

doi:10.7844/kirr.2023.32.5.52

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2023 Vol.32, Issue 5 Preview Page Next Page

Research Paper

Effect of Salt Roasting Factors on Water Leaching of Vanadium Concentrate by Design of Experiment 실험계획법을 이용한 바나듐 정광의 수침출에 대한 염배소 요인 영향 연구

31 October 2023. pp. 52-61

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Abstract

We investigated the effect of salt roasting conditions on vanadium concentrate's water leaching by Design of Experiment (DOE). The experiments were done by a random sequence using the design of 2-level and three repetitions with a central point. The factors and their levels were roasting temperature 1000, 1200 °C, sodium sulfate ratio in sodium salt 30, 70 %. The change in factor level did not give a statistically meaningful effect on the vanadium leaching ratio based on T-test and ANOVA with a significance level of 0.05, and the vanadium leaching ratio was between 80 and 90 % in 30 minutes. In contrast, the factors and interaction had a statistically significant effect on the aluminum leaching ratio. Higher temperature and sodium sulfate ratio produce a higher aluminum leaching ratio, whereas the interaction of factors showed the opposite. Water leaching of roasted vanadium concentrate at 1000 °C/sodium sulfate ratio of 30 % and 1200 °C/70 % resulted in 8.96 % and 0 % of aluminum leaching ratio, respectively. A regression analysis produced an aluminum leaching model equation with an R-squared of 0.9960.

Keywords

vanadium concentrate

salt roasting

water leaching

design of experiment

leaching model equation

실험계획법을 이용하여 바나듐 정광의 염배소가 수침출에 미치는 영향에 대한 연구를 수행하였다. 배소온도 1000, 1200 °C, 탄산나트륨 대비 황산나트륨의 비율 30, 70 %를 요인과 수준으로 설정하고 중심점을 포함하는 2 수준 3 회 반복 실험계획을 설계하고 무작위 순서로 실험을 실시하였다. 실험 결과에 대한 유의수준 0.05에서 T 검증과 분산분석을 통해 바나듐의 침출율에는 염배소 요인 변동이 통계적으로 유의미한 영향을 미치지 않는 것을 확인하였고 30분 수침출 시 80∼90 % 침출율을 나타내었다. 알루미늄 침출율은 모든 요인과 요인의 교호작용에 유의미한 영향을 받았으며, 배소온도, 황산나트륨의 비율은 요인의 수준이 높아질수록 침출율을 낮추었으나 이 둘의 교호작용은 반대로 영향을 주었다. 배소온도 1000 °C/황산나트륨 비율 30 %, 1200 °C/황산나트륨 비율 70 %에서 각각 8.96, 0 %의 알루미늄 침출율을 나타내었다. 회귀분석을 통해 알루미늄의 침출 모델식을 제안하였으며, 유의수준 0.05에서 분산분석을 통해 결정계수(R-squared) 0.9960의 모델식을 얻었다.

키워드

바나듐 정광

염배소

수침출

실험계획법

침출 모델식

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 :5
Pages :52-61
Received Date : 2023-10-10
Revised Date : 2023-10-24
Accepted Date : 2023-10-25
DOI :https://doi.org/10.7844/kirr.2023.32.5.52

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

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