The method of extraction of manganese from manganese ores

 

(57) Abstract:

The invention relates to the extraction of useful components hydrometallurgical methods. Leaching of manganese from the mn containing ores with hydrochloric acid to produce manganese oxides is a stoichiometric amount of hydrochloric acid at a temperature of process, component 80-90oC. the Method can improve the efficiency of the process by eliminating extra steps and increase the purity of the target product.

The invention relates to the extraction of useful components hydrometallurgical methods and can be used in mining and processing enterprises, when extracting manganese from the mn containing ores by leaching.

Known methods of extraction of manganese from manganese ores, consisting in reduction firing with various reducing agents, followed by leaching with sulfuric acid [1-3]. The disadvantages of these methods are the need for a process of high-temperature reduction roast, low degree through extraction of manganese, the consumption of concentrated sulfuric acid, the duration of the leaching process.

drida or a mixture of sulfuric and sulfurous acids [4, 5]. The disadvantages of the known methods are relatively low degree of extraction of manganese from the ore, the need for costly and environmentally harmful reagent is sulfur dioxide or unstable in aqueous solutions of an expensive reagent - sulfurous acid.

The closest to the invention is a method of extraction of manganese from manganese ores, including leaching with hydrochloric acid without translation of manganese in solution [6].

The disadvantage of this known solution, taken as a prototype, is the low purity of the target product and the complexity of the process.

The technical result of the invention is to increase process efficiency by eliminating extra steps and increase the purity of the target product.

The technical result is achieved by the method of extraction of manganese from manganese ores, including leaching with hydrochloric acid without translation of manganese in the solution according to the invention by leaching using a stoichiometric amount of hydrochloric acid required to obtain manganese in the form of oxides, at a concentration of 5-20 wt.% and when the process temperature, the composition of the>3+ Cl2+ H2O

3Mn2O3+ 2HCl = 2(Mn2+Mn23+)O4+ Cl2+ H2O

(Mn2+Mn23+)O4+ 2HCl = 3MnO + Cl2+ H2O

In the process of reactions resulting oxides of manganese (Mn2O3, (Mn2+Mn23+)O4and MnO) are in the form of fine sediment, which can be separated from the ore stream of water and further highlighted in the sump in the form of manganese concentrate. The process temperature is 80-90oC, and the process is carried out in a closed system.

The proposed solution eliminates the stage of precipitation of manganese from a solution of manganese chloride, as used for the leaching stoichiometric amount of hydrochloric acid not result in soluble chloride of manganese.

Example 1. The method is tested on the ore sample North Fizulinskogo Deposit composition: Mn 17-50%, P 0,08%, Fe 2%, silica 50%. A portion 108,9 grams of this ore was treated with 20% solution of hydrochloric acid, taken in stoichiometric quantities according to the above reactions. Leaching of the ore was carried out in a closed system at a temperature of 80-90oC for four cholee 99.0% oxides of manganese, the degree of extraction of manganese is to 97.1%.

Example 2. Analogously to example 1 a portion 230,1 g ore was treated with 10% hydrochloric acid solution. Dedicated manganese concentrate contained more than 99.0% oxides of manganese, the degree of extraction of manganese is 96.5%.

Example 3. Analogously to example 1 a portion 280,9 g ore was treated with 5% hydrochloric acid solution. Dedicated manganese concentrate contained more than 99.0% oxides of manganese, the degree of extraction of manganese is 96,3%.

Example 4. When used for leaching of hydrochloric acid with a concentration above 20% found the presence in solution of chloride of manganese.

Example 5. Analogously to example 1 a sample of ore was treated with 3% hydrochloric acid solution. The degree of extraction of manganese is only 81.2 per cent.

Thus, the proposed method allows to obtain manganese concentrate of high purity, as at the selected process conditions, the presence of oxides of other metals (particularly iron) in manganese concentrate is practically eliminated, and the single-stage process process greatly simplifies its technical implementation.

The list of literature dealing with. 3-84.

2. Altaev A. I. and other Technology VAT leaching of manganese from tailings and low quality ores: Kim, 1984, No. 10, S. 6-9.

3. United E. S. and other Materials of the 2nd all-Union conference on geotechnical methods of mining. - M.: Chemistry, 1975, vol. 1, S. 173-177.

4. Method for the recovery of manganese from ores and concentrates: Patent 2039109 Russia, 6 From 22 In 47/00 //ŝëlkin A. A. Baranov, C. M., Bubnov C. K., Yakhno, J. I.

5. Processing methods of manganese ore: ABT. mon. USSR N 350850, 22 B 47/00 //chachanidze I. P., Purtseladze H. G., Epiphany E. I., Svanidze, M. I., Rekhviashvili Century. And.

6. Anoosh S. I. "Getting low-phosphorus manganese concentrates. Kyiv: Tekhnika, 1969, S. 105.7

The method of extraction of manganese from manganese ores, including leaching with hydrochloric acid without translation of manganese in solution, characterized in that the leaching using a stoichiometric amount of hydrochloric acid required to obtain manganese in the form of oxides, at a concentration of 5-20 wt.% and when the process temperature, component 80-90oC.

 

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