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Vanadium slag brick and preparation method thereof
The invention relates to a vanadium slag brick and a preparation method thereof, and belongs to the technical field of vanadium extraction tailing recycling. The preparation method of the vanadium slag brick comprises the steps that V2O5 is extracted from vanadium slag obtained after vanadium is extracted through a sodium salt roasting method, gradient roasting is conducted on vanadium precipitation waste water obtained after V2O5 is extracted, then a reducing agent is added and mixed, a reaction is conducted for 1.5-2 h at the temperature of 1000-1150 DEG C for reduction to obtain a solid and SO2, NH3 and CO2 gases, wherein the solid contains Na2S; Na2S is leached from the solid with alkali at 75-90 DEG C to obtain solid residues, and the solid residues are dried for later use; and the dried solid residues are uniformly mixed with lime and gangue according to a ratio of (2.8-3.2): (0.8-1.2): (0.8-1.2), water is added, and aging, forming and sintering are carried out. According to the method, the vanadium slag is efficiently utilized, meanwhile, emission is low, and the resource value is maximized.
本发明涉及一种钒渣砖及其制备方法，属于提钒尾渣再利用技术领域。本发明钒渣砖的制备方法包括：将提钒后的钒渣用钠化焙烧法提取V2O5，将提取V2O5后的沉钒废水进行梯度焙烧，再加入还原剂混合后1000～1150℃反应1.5～2h还原，得到固体和SO2、NH3、CO2气体，所述固体中含有Na2S；将所述固体用碱在75～90℃浸出Na2S后得到固体残渣，将固体残渣烘干备用；将烘干后的固体残渣与石灰，矸石，按照2.8～3.2:0.8～1.2:0.8～1.2的比例混合均匀，加水、陈化、成型，再烧结即可。本发明的方法高效利用钒渣，同时排放低，资源价值得到最大化。
Vanadium slag brick and preparation method thereof
The invention relates to a vanadium slag brick and a preparation method thereof, and belongs to the technical field of vanadium extraction tailing recycling. The preparation method of the vanadium slag brick comprises the steps that V2O5 is extracted from vanadium slag obtained after vanadium is extracted through a sodium salt roasting method, gradient roasting is conducted on vanadium precipitation waste water obtained after V2O5 is extracted, then a reducing agent is added and mixed, a reaction is conducted for 1.5-2 h at the temperature of 1000-1150 DEG C for reduction to obtain a solid and SO2, NH3 and CO2 gases, wherein the solid contains Na2S; Na2S is leached from the solid with alkali at 75-90 DEG C to obtain solid residues, and the solid residues are dried for later use; and the dried solid residues are uniformly mixed with lime and gangue according to a ratio of (2.8-3.2): (0.8-1.2): (0.8-1.2), water is added, and aging, forming and sintering are carried out. According to the method, the vanadium slag is efficiently utilized, meanwhile, emission is low, and the resource value is maximized.
本发明涉及一种钒渣砖及其制备方法，属于提钒尾渣再利用技术领域。本发明钒渣砖的制备方法包括：将提钒后的钒渣用钠化焙烧法提取V2O5，将提取V2O5后的沉钒废水进行梯度焙烧，再加入还原剂混合后1000～1150℃反应1.5～2h还原，得到固体和SO2、NH3、CO2气体，所述固体中含有Na2S；将所述固体用碱在75～90℃浸出Na2S后得到固体残渣，将固体残渣烘干备用；将烘干后的固体残渣与石灰，矸石，按照2.8～3.2:0.8～1.2:0.8～1.2的比例混合均匀，加水、陈化、成型，再烧结即可。本发明的方法高效利用钒渣，同时排放低，资源价值得到最大化。
Vanadium slag brick and preparation method thereof
钒渣砖及其制备方法
CHEN YINGDONG (author) / ZHANG SHIJU (author) / FEI ZHIKUI (author) / DENG YUFANG (author) / TANG YIKE (author)
2021-07-13
Patent
Electronic Resource
Chinese
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