The Main Application Of Manganese Sulfide
Manganese sulfide has been used in powder metallurgy, weak magnetic semiconductor materials, optical, electric, magnetic materials and the preparation of high purity manganese salts.
1) A kind of manganese sulfide/carbon nanotubes composite material is prepared. Specifically, carbon nanotubes are added to the mixed acid prepared by concentrated sulfuric acid and concentrated nitric acid for ultrasonic treatment, so that the surface of carbon nanotubes is grafted with hydrophilic groups, and then mixed with surfactants to form a suspension. Then, sulfur source with amino group is added to make it react with the groups on carbon nanotubes. Then the manganese source was mixed into the mixture and transferred to the reactor for hydrothermal reaction to get the manganese sulfide/carbon nanotubes composite. The invention is characterized by the use of water electrolyte in the production process, the use of manganese sulfide coating carbon nanotubes can better maintain the integrity of the shape of carbon nanotubes, the damage to the carbon tube is reduced; At the same time, the axial arrangement of manganese sulfide along the carbon nanotubes increases its specific surface area, makes the zinc ions better embedded and removed, increases its conductivity, and the prepared composite material has a good rate performance.
2) Manganese and sulfur are extracted from the complex manganese ore of manganese sulfide, which is mainly composed of 70%-75% manganese sulfide, 15%-20% manganese carbonate and 2%-3% manganese oxide. The specific steps of this method are as follows: Compound manganese concentrate was obtained by crushing and grinding of the ore and beneficiation, which was placed in the reactor for autoredox leaching. The weight ratio of sulfuric acid solution to compound manganese concentrate was 2-10 ∶1, the leaching temperature was 30℃~100℃, and the leaching time was 30min~120min. Then oxidant is added for oxidation leaching, filtration, and impurity removal of the leaching solution. The filtrate obtained is electrolyzed to electrolytic manganese metal. The leaching residue is added to the desulfurizer, and the solvent containing elemental sulfur is cooled so that the elemental sulfur can be precipitated. The method of the invention provides a new process for treating manganese resources and extracting manganese and sulfur at the same time, and has the advantages of short process, reducing energy consumption, saving resources, high product recovery rate and green environmental protection.
3) A kind of manganese sulfide nanorods was prepared. The preparation method of manganese sulfide nanorods is characterized in that it includes the following steps: 1) manganese salt solution is obtained according to the ratio of manganese salt to solvent =(2-5)mmol to (10-30)mL; 2) The sulfur solution was obtained according to the ratio of sulfur powder to solvent =(2~5)mmol to (5~15)mL; 3) After heating the manganese salt solution to 100~200℃, inject the sulfur solution, and then heating to 240~300℃, to get a mixed solution, as the reaction system; 4) Establish the injection system: prepare the same manganese salt solution as step 1 as the first injection system, and prepare the same sulfur solution as step 2 as the second injection system; 5) The manganese salt solution in the first injection system and the sulfur solution in the second injection system are injected into the mixed solution in the reaction system respectively; Manganese sulfide nanorods were obtained. The method is simple, environmentally friendly and has low production cost. The MnS nanorods obtained by this method are evenly distributed, with length ranging from 50 nm to 400nm and length-diameter ratio ranging from 2∶1 to 8∶1.
