石煤提钒废渣再利用的工艺研究与选择

Research and Selection of Recycling Technique for Vanadium Extraction Residues from Stone Coal

分别对某石煤提钒水浸废渣和酸浸废渣开展了再提取钒的试验研究。结合工艺矿物学分析,认为废渣的综合回收利用率不大。提钒试验结果证明：在低酸搅拌浸出的条件下,水浸废渣钒浸出率约为38%,酸浸废渣钒浸出率约为28%;在较优的液固比条件下,两种渣的浸出液浓度均可达到0.9~1.2 g/L,可实现两种废渣中钒的再回收。同时,对废渣再提钒经济效益估算得知,在采取简单工艺条件时,具有一定的经济效益。

Tests of vanadium re-extraction were made on the residues of water leaching and acid leaching of stone coal for vanadium extraction. According to the mineralogical analysis, it is considered that the comprehensive recycling rate of the residues is not high. The test results show that under the condition of low-acid stirring leaching, vanadium leaching rate of the water leaching residue is approximate 38% while that of the acid leaching residue is approximate 28%. Under the condition of more proper liquid-solid ratio, the concentration of leaching solution of the two residues can reach to 0.9-1.2 g/L. Therefore, it is possible to recover vanadium in the two residues. It is known from the estimate of the economic benefits of the vanadium re-extraction from residues that it has certain economic benefits when using simple process conditions.