Method for producing manganese sulfate monohydrate crystal using pyrolusite and waste acid as raw material
A technology of manganese sulfate and pyrolusite, applied in the direction of manganese sulfate, etc., can solve the problems of waste of resources, low utilization rate of manganese, strong corrosion of equipment, etc., and achieve the effect of stable product quality, simple production process and high manganese recovery rate
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[0019] Example one
[0020] ①The Guangxi Guiping Song soft manganese ore (MnO 2 ) (Manganese content 16.10%), ground to -0.074mm, the Yunfu pyrite (FeS 2 ) (Sulfur content 30.51%), grind to -0.074mm, take titanium dioxide (TiO 2 ) Plant waste acid (dilute H 2 SO 4 Contains FeSO 4 , Ρ(H 2 SO 4 )=168g / L};
[0021] ②Take the above titanium dioxide (TiO 2 )Industrial waste acid 0.39M 3 Pour into a manganese leaching tank with stirring, add -0.074mm pyrolusite (MnO 2 )187Kg (dry basis) and -0.074mm fineness pyrite (FeS 2 ) 30Kg (dry basis) powder is added to the manganese soaking tank, and steam is heated to 90℃ to soak the manganese for 2 hours. At this time, the pH of the manganese (Mn) leaching solution was determined to be 1.05, and limestone (CaCO 3 ) Powder to make the solution PH=3.51, add 0.62Kg of barium sulfide (BaS) to precipitate heavy metals, and after reacting for 20 minutes, add limestone (CaCO 3 ) Adjust the PH value of the powder to 5.2, the reaction time is 40min, pre...
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[0026] Example two
[0027] ①The Guangxi Guiping Song soft manganese ore (MnO 2 ) (Manganese content 17.2%), ground to -0.074mm, the Yunfu pyrite (FeS 2 ) (Sulfur content 30.51%), ground to -0.074mm, take Tengxian titanium dioxide (TiO 2 )Powder plant waste acid {(dilute H 2 SO 4 Contains FeSO4 ), ρ(H 2 SO 4 )=168g / L};
[0028] ②Take the above titanium dioxide (TiO 2 )Industrial waste acid 0.36M 3 Pour into a manganese leaching tank with stirring, add -0.074mm pyrolusite (MnO 2 )160Kg (dry basis) and pyrite (FeS 2 ) 30Kg (dry basis) powder is added to the manganese soaking tank, and manganese (Mn) soaked at 95℃ for 2 hours. At this time, the pH of the manganese (Mn) leaching solution was determined to be 1.43, and limestone (CaCO 3 ) Powder to make the solution PH=2.53, add 0.6Kg of barium sulfide (BaS) to precipitate heavy metals, the reaction time is 30min, and then add limestone (CaCO 3 ) Adjust the pH of the powder to 6.2, the reaction time is 35min, precipitate iron (Fe), alu...
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[0033] Example three
[0034] ①The Guangxi Guiping Song soft manganese ore (MnO 2 ) (Manganese content 22.01%), ground to -0.074mm, the Yunfu pyrite (FeS 2 ) (Sulfur content 30.51%), grind to -0.074mm, take Tengxian titanium dioxide (TiO 2 )Factory waste acid {(dilute H 2 SO 4 Contains FeSO 4 ), ρ(H 2 SO 4 )=168g / L}.
[0035] ②Take the above titanium dioxide (TiO 2 )Industrial waste acid 0.42M 3 Pour into the manganese leaching barrel with stirring to remove -0.074mm pyrolusite (MnO 2 )164Kg (dry basis) and pyrite powder (FeS 2 ) 36Kg (dry basis) is added to the manganese leaching tank, and manganese (Mn) is leached at 98°C for 2 hours. At this time, the pH of the manganese (Mn) leaching solution was determined to be 1.96, and limestone (CaCO 3 ) Make the solution PH=3.0, add 0.6Kg of barium sulfide (BaS) to react for 30min to precipitate heavy metals [such as lead (Pb), zinc (Zn), cobalt (Co), nickel (Ni)]. Then adjust the PH value to 5.25, react for 40 minutes to precipitate iro...
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