A kind of desulfurization method of ferromanganese ore

Abstract

The invention relates to a desulphurization technology for Fe-Mn ore, in particular to a desulphurization method for Fe-Mn ore. The Fe-Mn ore is pulverized to make the particle size to reach 150-200 meshes, and ore powder is obtained after sieving; water is added into the ore powder and evenly stirred under the condition of 80-120 DEG C, and slurry is obtained; the slurry is stirred, sulfur dioxide gas is injected at the same time, auxiliaries are added and stirred for 30 min after 30-40 min of stirring and 10-20 min of still standing, the adding quantity of the auxiliaries is 1 / 30 to 1 / 20 of the size of the slurry, and intermediate materials are obtained; and cellulose is added into the intermediate materials and stirred for 20-50 min, and then separation is carried out to obtain flake flocks, solid and sulphate solutions. The desulphurization method has a good desulphurization effect, is low in cost, free of pollution and capable of removing a part of harmful ions such as lead and cadmium.

Description

technical field [0001] The invention relates to a desulfurization technology of iron-manganese ore, in particular to a desulfurization method of iron-manganese ore. Background technique [0002] Ferromanganese ore is an important mineral raw material, mainly used in smelting industry, especially iron and steel smelting, but some substances in ferromanganese ore will have adverse effects on smelting, for example, the sulfur content fluctuates greatly on smelting, and the solubility of sulfur in iron is extremely small , part of which exists in the steel in the form of FeS. On the one hand, it increases the brittleness of the steel. On the other hand, FeS and Fe can form a eutectic with a low melting point (985°C), which is distributed on the austenite grain boundary. When the steel is heated to about 1200°C for hot pressure processing, the eutectic on the grain boundary has been melted, and the bonding between the grains is destroyed, which in turn causes the steel to crack a...

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Problems solved by technology

[0003] In the prior art, the sintering method is generally used for desulfurization, and the process is proficient, but the heat consumption is large and the cost is high, and the removed sulfur is discharged into the air in the form of gas, causing air pollution; the patent number is 201310242967. Rhodochrosite" discloses a desulfurization treatment of rhodochrosite by using a desulfurization agent formed by combining vanadium pentoxide and 2.6-anthraquinone disulfonic acid or vanadium pentoxide and tannin extract. This method has good desulfurization effect and low energy consumption , but the time is long, the amount of reagents is large, and this method is based on the simple composition of rhodochrosite itself, mainly containing manganese, iron, calcium, zinc, and the crystal belongs to the trigonal crystal system, so the desulfurization treatment is easier; The content of harmful substances such as silver, cadmium, and arsenic is high, and the crystal belongs to the tetragonal crystal system, so the desulfurization treatment of ferromanganese ore is difficult. Therefore, the desulfurization method of ferromanganese ore still needs a lot of research

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