Manganese Ore Beneficiation Flowsheet
The manganese ore beneficiation flowsheet typically comprises stages such as crushing, grinding, classification, and separation. After the raw ore undergoes crushing and grinding, the manganese minerals and gangue minerals are fully liberated from one another. Gravity separation is then employed to recover the primary manganese minerals, supplemented—where necessary—by magnetic separation or flotation to further improve the concentrate grade and recovery rate. The resulting manganese concentrate is subsequently thickened and dewatered to serve as the final product, while the tailings are directed to the tailings treatment system.
Key Process
Currently, gravity separation is applied primarily to manganese ores with simple structures and relatively coarse grain dissemination; it is particularly well-suited for high-density manganese oxide ores. Common methods include heavy medium separation, jigging, and shaking table separation; coarser fractions are typically processed via jigging, while finer fractions are sent to shaking tables.
Due to its operational simplicity, ease of control, and strong adaptability, magnetic separation can be applied to the beneficiation of various types of manganese ores. In recent years, it has assumed a dominant position within the field of manganese ore beneficiation. Typically, this process can increase the manganese grade by 4 to 10 percentage points. IV. Manganese Ore Beneficiation Process Flowchart
Related Case Study
For a specific low-grade oxidized manganese ore deposit in Guangxi—characterized by a raw ore manganese grade of only around 18% and a high clay content—Henan Bailing Machinery implemented a process flow consisting of “washing and desliming – classification and magnetic separation – shaking table beneficiation.” The process begins with a drum washer to remove primary slime and classify the ore; the coarse fraction is then crushed and combined with the fine fraction for rough magnetic separation. This step allows for the rejection of a large volume of tailings while preliminarily enriching the manganese minerals. The magnetic concentrate is subsequently dewatered and fed into shaking tables for intensive beneficiation, effectively separating fine-grained gangue minerals. Ultimately, the manganese concentrate grade was successfully upgraded to over 38%, achieving a recovery rate of 85%, thereby realizing the efficient beneficiation and quality enhancement of this challenging-to-process manganese ore.
