Magnetic separation of manganese ore

The world's manganese ore resources are mainly distributed in South Africa, the former Soviet Union, Australia, China and other countries. In addition to China, the reserves of manganese ore in the world are about 17.292 billion tons. China's proven reserves as of 1999 were 566 million tons, ranking fourth in the world.

The main manganese minerals are pyrolusite, hard manganese ore, black manganese ore, brown manganese ore, and rhodochrosite.

Many classification manganese ore, into the sedimentary deposits by cause, metamorphic weathering manganese ore type and the like; press iron ore, manganese ore and manganese content into ferromanganese ore; industrial uses divided by metallurgical and chemical manganese Manganese ore. In addition, it is divided into manganese carbonate ore, manganese oxide ore, mixed ore and polymetallic manganese ore according to the natural type of minerals and associated elements.

Manganese in the manganese carbonate ore-ore in the form of various manganese carbonate minerals, the content of which accounts for more than 85% of the manganese content in the ore.

Manganese in the manganese oxide ore-ores in the form of various manganese oxide minerals, the content of which accounts for more than 85% of the manganese content in the ore.

The manganese in the mixed manganese ore-ore ore in the form of various manganese carbonate minerals or manganese oxides accounts for less than 85% of the manganese content in the ore.

Polymetallic manganese ore - Different from the above three manganese ores, it contains other metals and non-metallic minerals in addition to manganese.

China has more manganese carbonate ore, accounting for 57% of the total manganese ore. At present, manganese ore beneficiation methods include re-election, heavy medium-strong magnetic separation, roasting-strong magnetic separation, single strong magnetic separation, flotation, and various methods.

Manganese minerals are weak magnetic minerals, and their specific magnetic susceptibility and gangue minerals are quite different. Therefore, the strong magnetic separation of manganese ore occupies an important position. A better separation index can be obtained by a single magnetic separation process for manganese carbonate ore and manganese oxide ore with relatively simple composition and coarser grain size. When sorting manganese carbonate ore, the magnetic field strength of the magnetic separator should be above 480kA/m, and the magnetic field strength of the magnetic separator for sorting manganese oxide ore should be higher, generally above 960kA/m.

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