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

A pyrolusite, low-grade technology, applied in the field of mineral metallurgy, can solve the problems of complex impurity removal process of leaching solution, low leaching efficiency, low manganese recovery rate, etc., and achieves strong reference value and practical significance, high recovery efficiency, and acid consumption. The effect of low energy consumption

Inactive Publication Date: 2013-12-11
UNIV OF SCI & TECH BEIJING
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has long leaching time and low leaching efficiency, and at the same time, the impurity removal process of the leaching solution is relatively complicated and the manganese recovery rate is low.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Take the particle size as -0.147mm+0.074mm with V 2 o 5 Stone coal with a grade of 1% and low-grade pyrolusite with a particle size of -0.045mm+0.037mm and a grade of 20% Mn, the gas flow rate is controlled at 0.4m 3 / h, according to stone coal and pyrolusite mass ratio is 5:1, and stone coal roasting temperature is 700 ℃, and pyrolusite roasting temperature is 900 ℃, and roasting time is 4h, carries out fluidized roasting respectively;

[0030] (2) The stone coal fluidized oxidation roasting sample obtained in the above step (1) is subjected to low-temperature sulfuric acid according to the acid-mineral ratio of 1:1mL / g, the mass fraction of sulfuric acid is 40%, the roasting temperature is 400°C, and the roasting time is 2h. Roasting without additives;

[0031] (3) The stone coal sulfation roasting sample obtained in the step (2) and the pyrolusite fluidized reduction roasting sample obtained in the step (1) are set at a slurry liquid-solid ratio of 8:1mL / g, and...

Embodiment 2

[0034] (1) Take the particle size as -0.178mm+0.147mm with V 2 o 5 Stone coal with a grade of 1.5% and low-grade pyrolusite with a particle size of -0.147mm+0.074mm and a grade of 7% Mn, the gas flow rate is controlled at 0.6m 3 / h, according to the mass ratio of stone coal and pyrolusite is 10:1, the stone coal roasting temperature is 900°C, the pyrolusite roasting temperature is 600°C, and the roasting time is 2h, respectively carry out fluidized roasting;

[0035](2) The stone coal fluidized oxidation roasting sample obtained in the step (1) is subjected to low-temperature sulfuric acid according to the ratio of acid to mineral 2:1mL / g, the mass fraction of sulfuric acid is 10%, the roasting temperature is 250°C, and the roasting time is 3h. Roasting without additives;

[0036] (3) The stone coal sulfated roasting sample obtained in the step (2) and the pyrolusite fluidized reduction roasting sample obtained in the step (1) are set at a liquid-solid ratio of 10:1mL / g, and...

Embodiment 3

[0039] (1) The particle size is -0.074mm+0.045mm containing V 2 o 5 Stone coal with a grade of 0.5% and low-grade pyrolusite with a particle size of -0.074mm+0.045mm and a grade of 13% Mn, the gas flow rate is controlled at 0.2m 3 / h, according to the mass ratio of stone coal and pyrolusite is 1:1, the stone coal roasting temperature is 1100°C, the pyrolusite roasting temperature is 750°C, and the roasting time is 1h, respectively carry out fluidized roasting;

[0040] (2) The stone coal fluidized oxidation roasting sample obtained in the step (1) is subjected to low-temperature sulfuric acid according to the ratio of acid to mineral 0.5:1mL / g, mass fraction of sulfuric acid 60%, roasting temperature 150°C, and roasting time 1h. Roasting without additives;

[0041] (3) The stone coal sulfated roasting sample obtained in the step (2) and the pyrolusite fluidized reduction roasting sample obtained in the step (1) are determined according to the slurry liquid-solid ratio of 5:1...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22C22B47/00C22B1/06C22B1/10C22B3/08C22B3/26
CPCY02P10/20
Inventor 冯雅丽李浩然蔡震雷王维大
Owner UNIV OF SCI & TECH BEIJING
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