HWAHAK KONGHAK, Vol.18, No.3, 153-162, June, 1980
중유회분(boiler slag)으로부터 바나듐 회수에 관한 연구
A Study on the Recovery of Vanadium from the Fuel Oil Ash
초록
본 연구의 목적은 중유회분으로부터 바나듐을 회수하는 효율적인 공정을 제시하는 것이다.
중유회분을 습식분쇄 및 알칼리배소 과정을 거쳐 회분으로부터 바나듐회수를 최대화 할 수 있었다.
습식분쇄의 유익한 효과는 건식분쇄보다 분쇄기의 크기와 동력소모가 현저히 저하되고 분쇄시 약 40 %의 바나듐이 동시에 침출된다는 점이다. 습식분쇄 후 여액내에 함유된 바나듐을 산화과정에서 Red Cake로 직접 침전시킬 수 있었으며 이를 여과한 후 Cake내의 대부분의 바나듐은 알칼리로 배소하고 이를 물로 침출하여 Sodium metavanadate로 회수하였다.
알칼리용액에서 최종 생성물은 산성용액에서 회수된 것보다 순도가 높은 약 97 % 이상의 V2O5가 회수되었다.
중유회분을 습식분쇄 및 알칼리배소 과정을 거쳐 회분으로부터 바나듐회수를 최대화 할 수 있었다.
습식분쇄의 유익한 효과는 건식분쇄보다 분쇄기의 크기와 동력소모가 현저히 저하되고 분쇄시 약 40 %의 바나듐이 동시에 침출된다는 점이다. 습식분쇄 후 여액내에 함유된 바나듐을 산화과정에서 Red Cake로 직접 침전시킬 수 있었으며 이를 여과한 후 Cake내의 대부분의 바나듐은 알칼리로 배소하고 이를 물로 침출하여 Sodium metavanadate로 회수하였다.
알칼리용액에서 최종 생성물은 산성용액에서 회수된 것보다 순도가 높은 약 97 % 이상의 V2O5가 회수되었다.
The objective of this study is to present an efficient process for recovering vanadium values from the fuel oil ash.
It was found that the ash processing should be conducted on wet grinding and alkaline roasting for the maximum vanadium recovery from the fuel oil ash.
The beneficial effects of wet grinding were that the capacity and power requirement were considerably reduced than that of dry grinder and about 40 % of sodium vanadate was leached out during grinding.
From the filtrate after wet grinding, the solubilized vanadium could be directly precipitated as red cake （crude V2O5） during oxidation. Most of vanadium from the cake after filtration was treated by alkaline roasting and was leached out sodium vanadate from the roasted product by means of water.
The purity of the final product obtained from basic solution was above 97 % of V2O5, which was higher than that from acidic solution.
It was found that the ash processing should be conducted on wet grinding and alkaline roasting for the maximum vanadium recovery from the fuel oil ash.
The beneficial effects of wet grinding were that the capacity and power requirement were considerably reduced than that of dry grinder and about 40 % of sodium vanadate was leached out during grinding.
From the filtrate after wet grinding, the solubilized vanadium could be directly precipitated as red cake （crude V2O5） during oxidation. Most of vanadium from the cake after filtration was treated by alkaline roasting and was leached out sodium vanadate from the roasted product by means of water.
The purity of the final product obtained from basic solution was above 97 % of V2O5, which was higher than that from acidic solution.