The method of producing oxides of manganese

 

(57) Abstract:

The invention relates to the field of beneficiation of manganese ores, in particular, to methods for manganese concentrates chemical enrichment. The method of producing oxides of manganese includes the processing solution of sulphate of manganese oxygen or oxygen in the presence of ammonia and obtaining precipitate as oxides of manganese, and the concentration of the components of the working solution is maintained within the limits: manganese sulfate 0.1 to 0.7 mol/l, ammonia 0.1 to 1.5 mol/l, ammonium sulfate 1.2 to 1.6 mol/l, the Proposed method allows us to simplify the process of obtaining oxides of manganese, suitable for direct use in metallurgy, and to obtain a whole range of manganese compounds.

The invention relates to the field of beneficiation of manganese ores, in particular, to methods for manganese concentrates chemical enrichment (CWC).

All known methods of obtaining the CWC includes two main stages - the leaching of manganese from ore by putting it into solution in the form of sulfate, nitrate or chloride of manganese and precipitation from solution as a solid phase. The key to the process is the stage of deposition, OS="ptx2">

Known methods for producing the CWC, including the leaching of carbonate or restored oxide of manganese ore with sulfuric acid followed by treatment of the manganese sulfate ammonium carbonate or lime milk or ammonia. For example, the processing of manganese sulfate ammonia in an autoclave and subsequent firing of the sediment-hydrate of oxide of manganese was obtained a product composition in %: 68 MP; 0,01 P; 0,06 Fe; 1.0 Mg; 0.5 To Sa ("state of the manganese-ore base in Russia and ensuring industry manganese". Proceedings of the 1st scientific-technical conference. Ed. by L. A. Smirnova. Ekaterinburg, 2000, S. 210).

A common drawback of these methods is that the oxides of manganese in the deposition of lead substances in solution, and the final product is the result obtained with a large number of impurities and precipitation poorly filtered.

A known method of producing oxides of manganese processing of manganese sulfate with ammonium carbonate to produce in the form of a precipitate of carbonate of manganese and its subsequent firing to oxides of manganese. (O. I. Dzyuba Obtaining concentrates from sulphate solutions and dithionate manganese". Abstract. Saint-Petersburg, Mekhanobr 1994, S. 3-10, 17).

One problem of this method is palesta, fractional deposition and other techniques. To obtain the final product for metallurgy manganese carbonate is fired at T=650C. This removes CO2and the product is oxidized to MP2ABOUT3. Then the product is washed from soluble compounds. As a result the oxides of manganese, containing 69% MP, 0.1 S, the remaining components (Si, Al, Fe, K, Na, Mg) in the range of 0.01 to 0.02%. Such as oxides of manganese can be applied in the production of ferrites. The process is complicated, inefficient, the product has a limited scope.

This way by the greatest number of similar features selected as a prototype.

The problem solved by the claimed invention is to simplify the process of obtaining oxides of manganese, expanding the scope and cost reduction of the final product.

The essence of the present invention is that the processing solution of sulphate of manganese are oxygen, or oxygen, in the presence of ammonia, the concentration of the components of the working solution is maintained within the range: manganese sulfate 0.1 to 0.7 mol/l, the ammonia from 0.1 to 1.5 mol/l and ammonium sulfate 1.2 to 1.6 mol/L.

The process shall receive the SUB>+4N3+O2+2H20=Mno2Mn(OH)2+2(NH4)2S04

To obtain high-quality sludge in the form of Mno2MP(OH)2the composition of the liquid phase is selected in the above range, so that in the absence of oxidizing agent (O2) the solution was stable and was not adverse reaction of formation of hydrate of oxide of manganese MP(OH)2.

The reaction of obtaining oxides of manganese proceeds at normal temperature and pressure and does not require any additional technological methods to improve the filterability of sludge.

The process allows you to obtain the easiest way is similar to the prototype of the final product - MP2ABOUT3. Hydrate water present in the oxides at the time of deposition can be easily removed by drying at T=60-120C. The product contains 68% MP, 0,1 S 0,01 Fe, Si, Al, and a small amount of oxides of alkali and alkaline earth metals, and fully satisfies the requirements of the CWC for metallurgy.

As the product has not been subjected to high temperature firing, it has a significantly different from the prototype properties. As a result of further processing of the product with sulfuric acid produces high-quality-modification of Dixi is the like, generated when receiving the modification, be used instead of primary sulfate manganese from the ore, you will get the product on the order of cleaner, i.e., the process allows to obtain the oxides and salts of manganese of any desired purity.

Thus, the inventive process allows for the most simple way to get a versatile product, suitable for direct use in metallurgy, and for further processing in a full range of manganese compounds, which does not provide none of the known technologies.

The process is carried out as follows.

In the reactor with a device for dispersing gas in a liquid, filled with the working mixture, continuously in the stoichiometric ratio submit a solution of manganese sulfate, an aqueous solution of ammonia and air. The slurry is continuously withdrawn on the filter, separating the solid precipitate, washed it, dried and shipped to the consumer or for further processing. Maintaining the required limits of concentration of the liquid phase in manganese sulfate and ammonia is the number fed to the reactor per unit time of the reagents, respectively manganese sulfate and ammonia, and the concentration of ammonium sulfate concentrator, with a capacity of 100 l with aerating stirrer pour 50 l of 20% ammonium sulphate, which was 1,68 mol/L. Then, under stirring and simultaneously in it filed 4.5 l of 25% aqueous ammonia solution and 13 l of a 25% solution of sulphate of manganese. The concentration at the initial moment of the manganese sulfate was 0.38 mol/l, and ammonia 0.83 mol/L. the Process led to complete depletion of the reactants, ammonia and sulphate of manganese, which was determined by the absence of changes in the residual ammonia concentrations. The performance of the reactor was under the concrete conditions of experience of 30 kg/m3working volume. After separation of the precipitate, washing and drying of the received 2.1 kg MP2ABOUT3containing 68% MP, 0,2 Mg, 0.1 Ca, K, Na and S and 0.01 Si, Al, Fe.

The present invention allows for the most simple way and at low cost to the original reagents, to obtain a versatile product, suitable for direct use in metallurgy and processing using simple technology in a full range of manganese compounds.

The method of producing oxides of manganese, including the processing solution of manganese sulfate reagent to obtain a precipitate, wherein the processing solution of sulphate of manganese lead to oderzhivayut on sulfate manganese 0.1 to 0.7 mol/l, ammonia 0.1 to 1.5 mol/l and ammonium sulfate 1.2 to 1.6 mol/L.

 

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