A method for high-efficiency leaching of manganese from pyrolusite by acidophilic leaching microorganism

The bioleaching method, which combines acidophilic leaching microorganisms with pyrite, utilizes these microorganisms to oxidize pyrite and produce ferric ions and sulfuric acid. This solves the problem of low leaching rate in low-grade pyrolusite and achieves efficient and green manganese extraction.

CN122344665APending Publication Date: 2026-07-07LANZHOU UNIV
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Patent Information

Application Number
CN202610546603.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-23
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies have low manganese leaching rates, especially for low-grade pyrolusite, where bioleaching efficiency is insufficient to meet industrial production needs. Furthermore, traditional methods suffer from high energy consumption and heavy pollution.

Method used

A bioleaching method combining acidophilic leaching microorganisms with pyrite is adopted. The acidophilic leaching microorganisms oxidize pyrite to produce ferric ions and sulfuric acid, which promotes the reduction and dissolution of manganese dioxide and improves the manganese leaching rate.

Benefits of technology

It significantly improves the manganese leaching rate, reaching up to 98.2%, is environmentally friendly and low-cost, and is suitable for the efficient comprehensive utilization of low-grade soft manganese ore.

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Abstract

This invention discloses a method for efficiently leaching manganese from pyrolusite using acidophilic leaching microorganisms, relating to the fields of hydrometallurgy and biometallurgy. The method involves leaching pyrolusite using acidophilic leaching microorganisms, supplemented with pyrite as an auxiliary iron-sulfur source to enhance the leaching process. The initial pH of the leaching medium is 1.6, the pulp concentration is 120 g / L, and the inoculum concentration of the acidophilic leaching microorganisms is 10 × 10⁻⁶. 8 Under conditions of pyrolusite / pyrite mass ratio of 2:1 (cells / mL), the manganese leaching rate can reach 98.2% after 16 days of bioleaching. This invention significantly improves manganese leaching efficiency compared to a system without pyrite addition (3.2%). This invention helps solve the technical problems of high energy consumption and significant pollution in traditional pyrometallurgical and hydrometallurgical processes, and has advantages such as high leaching efficiency, environmental friendliness, low cost, and simple process. It is suitable for the green development and utilization of pyrolusite, especially low-grade pyrolusite resources.
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