Beneficiation method for high armangite

Abstract

The invention discloses a beneficiation method for high armangite. The method comprises the following steps of: performing dry-type strong magnetic separation with the magnetic field intensity of 12,000 to 14,000 oersted on the high armangite which comprises 35 to 39 weight percent of manganese and 4 to 6 weight percent of arsenic and serves as a raw material; finely grinding until 60 weight percent of high armangite has the particle size of -0.074 mm by using a ball mill; performing wet-type strong magnetic separation with the magnetic field intensity of 8,000 to 10,000 oersted; performing awet-type chemical extraction reaction by using acid for 2 to 4 hours; and performing neutralization treatment on precipitates by using alkali liquor to obtain a manganese concentrate product which comprises more than or equal to 53.81 weight percent of manganese and less than or equal to 0.35 weight percent of arsenic, wherein the total recovery rate of the manganese is more than or equal to 80 percent. The technology is simple in process flows, and the method is applied to the treatment of minerals similar to tilasite CaMg (F / AsO4); operation wastewater is returned to ore grinding operation for recycling, so that water used during production is saved; leaching residues are treated by calcium salt to meet the emission standard, so that the method is environment-friendly; and the method isrelatively high in economic benefits, social benefits and ecological benefits.

Description

technical field

[0001] The invention belongs to the technical field of manganese ore beneficiation, and relates to a method for beneficiating high-arsenic manganese silicate ore containing fluorine-arsenic-magnesite. Background technique

[0002] Algeria (Guettara) manganese ore is a high-arsenic manganese ore, which contains 35-39% manganese and 4-6% arsenic. It has two very special features: First, it is not a common manganese oxide or manganese carbonate ore in China, but a manganese silicate Mn 6 (O 8 / SiO 4 ) ore; the second is that it contains extremely high arsenic minerals. This arsenic mineral is not a common arsenic sulfide mineral in China, such as arsenopyrite, realgar, orpiment, etc., but a rare fluoroarsenite CaMg ( F / AsO 4 ), and the distribution of arsenic minerals is extremely fine. If the arsenic content in the manganese ore concentrate cannot be effectively reduced, the development and utilization of the manganese ore resources will be directly affect...

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