Method for recovering vanadium and manganese by using stone coal and low-grade pyrolusite together

Abstract

The invention discloses a method for recovering vanadium and manganese by using stone coal and low-grade pyrolusite together, and belongs to the field of mineral metallurgy. The method comprises the following steps that (1), the stone coal and the low-grade pyrolusite at a mass ratio of (1-10):1 are subjected to fluidization roasting, and generated water gas is used for reduction roasting of the low-grade pyrolusite; (2), a stone coal fluidization oxidizing roasting sample is added to sulfuric acid and subjected to low-temperature sulfating additive-free roasting continuously; (3), a stone coal sulfating roasting sample and a pyrolusite fluidization reduction roasting sample are leached together to extract vanadium and manganese; and (4), a vanadium and manganese extract is subjected to asynchronous extraction separation for recovering vanadium and manganese, and pure vanadyl sulfate and manganese sulfate solutions are obtained, wherein an extraction rate of vanadium is greater than 98%, a reextraction rate of vanadium is 100%, an extraction rate of manganese is greater than 95%, and a reextraction rate of manganese can reach 100%. The method can sufficiently and effectively recover vanadium and manganese resources in the stone coal and the low-grade pyrolusite, is simple in technology, wide in application scope, low in acid consumption and energy consumption, and high in vanadium and manganese recovery efficiency, and does not pollute an environment.

Description

Technical field:

[0001] The invention belongs to the field of mineral metallurgy and provides a method for co-utilizing stone coal and low-grade pyrolusite to recover vanadium and manganese. Background technique:

[0002] Vanadium and manganese are important strategic resources, which play an important role in many aspects such as the production of ferrous non-ferrous alloys, semiconductor materials, redox flow batteries and catalysts. In my country, besides vanadium-titanium magnetite, stone coal is the most important vanadium-containing resource, and its V 2 o 5 reserves accounted for the national V 2 o 5 More than 85% of the total reserves. In the process of extracting vanadium from stone coal, the existence of its carbon component will lead to the hydrophobicity of the mineral surface, so that the acid-base leaching agent cannot effectively contact and react with the mineral surface, which is not conducive to the extraction of vanadium from stone coal. Usually, befo...

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