Abstract
Vanadium-titanium magnetite and ilmenite are recognized as one type of the most refractory mineral resources. Conventional carbothermal reduction smelting to extract Fe and Ti from vanadium-titanium magnetite and ilmenite is based on the natural resource attribute. After reduction smelting, abundant refractory high-titanium slag was obtained. In this work, according to the environmental material attribute, an alternative utilization for degradation of organic humic acid from the wastewater by high-titanium slag after metallurgical transformation was conducted via the ultraviolet absorption and degradation experiments. After metallurgical transformation at 1200 °C for 120 min, the high-titanium slag was transformed to titanate with spinel-type structure and photocatalytic property in the manganese titanates. The degradation efficiency of humic by the manganese titanate was over 48% as the fine-grained manganese titanate was with a dosage of 1.5 g/L and humic acid concentration was 10 mg/L. This work provided a high-value treatment of high-titanium slag for environmental remediation.KeywordsHigh-titanium slagMetallurgical transformationTitanateHumic acidPhotocatalytic degradation
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