Manganous Oxide Feed Grade Specifications

Grade MnO Mn02 Fe as FeO Si02 Pb As Cd Hg Ni
78-80 +62% Mn 2% Max 4-5% Min 2-%Max 30 ppm 30 ppm Nil Nil 200 ppm
76-78 +60% Mn 2% Max 5%    Min 3.5 Max 50 ppm 50 ppm Nil Nil 200 ppm
72.74 +56% Mn 2% Max 7%    Min 4.5 Max 50 ppm   50 ppm   Nil Nil 150 ppm  
62-65 +55% Mn 2% Max 12% Min 6.5 Max 80 ppm   100 ppm   Nil Nil 100 ppm  
36-38 +32% Mn 2% Max 32%  Min 6.5 Max 80 ppm   100 ppm   Nil Nil 200 ppm  

Activity test with w/w H2SO4 diluted in Distilled water for determination of Extractable Manganese %

Grade MnO   Mn (T)   Fe (T)   Extractable       Mn Solubility of      Fe Ph   % Extraction Mn  
78-80 62% Min 4%   Min  53.5  2.5 1.84  + 86 %
76-78 61% Min 5%   Min  50.5  2.5 2.14  + 82 %
72-74 58% Min 7%   Min 45.02  4.4 1.86  + 77 %
62-65 55% Min 10% Min 43.70  6.5 1.76  + 78 %
36-38 32% Min 36% Min  26.10 29.5 1.70  + 80 %

The above test is for chemical manufacturers to determine solubility of Manganese & Iron in mild Sulphuric acid for determination of efficiency in Industrial production of salts, chemicals & compounds and economic evaluation of raw material used.

Procedure : 10 grams specimen sample is digested at 90 C for 1 hrs. in 10 grams of H2So4 diluted in distilled water. Iron & Manganese titrated with KMn04. For titrating Mn; Iron is precipitated by adding ZnO and solution filtered before titration.

Low Carbon Ferro Manganese Medium Carbon Ferro Manganese High Carbon Ferro Manganese Silico Manganese Cenosphere