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Harmless treatment method and equipment for electrolytic manganese residues

A technology of harmless treatment and electrolysis of manganese slag, which is applied in the field of resource utilization of electrolytic manganese slag, can solve problems such as manganese slag bonding equipment, and achieve the effect of solving bonding equipment and increasing friction

Active Publication Date: 2022-05-17
广西建筑材料科学研究设计院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the utilization of manganese slag solid waste is mainly applied to wall materials, building materials, etc. Since manganese slag contains certain harmful components such as heavy metal ions and ammonia nitrogen, it must be harmlessly pretreated before application to ensure Harmless recycling of recycled products, manganese slag still has the problem of bonding equipment during the mixing process

Method used

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  • Harmless treatment method and equipment for electrolytic manganese residues
  • Harmless treatment method and equipment for electrolytic manganese residues
  • Harmless treatment method and equipment for electrolytic manganese residues

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The equipment used in the harmless treatment method of electrolytic manganese slag is as follows: figure 2 As shown, it includes washing and stirring equipment 1, primary filter press equipment 2, filtrate recovery tank 3, digestion and stirring equipment 4, secondary filter press equipment 5, sewage treatment system 6, mixing and stirring equipment 7, ammonia gas treatment system 8 and aging Storehouse 10, the upper ends of the washing and stirring equipment 1, the digestion and stirring equipment 4 and the mixing and stirring equipment 7 are all connected to the ammonia treatment system 8 through the air pipe; the lower ends of the washing and stirring equipment 1 are connected to the primary filter press equipment 2 through the transmission pipeline , the primary filter press equipment 2 is connected to the filtrate recovery tank 3 and the digestion and stirring equipment 4 through the transmission pipeline respectively; the bottom of the digestion and stirring equip...

Embodiment 2

[0025] Such as figure 1 As shown, a harmless treatment method for electrolytic manganese slag, including the following steps: (1) Washing and stirring: add water to the manganese slag filtered out of the electrolytic manganese plant for washing and stirring, and the ammonia gas generated during the washing and stirring process is transported to Ammonia gas treatment system for treatment; (2) Primary filter press: filter the manganese slag after washing and stirring with water to separate solid and liquid, and the separated waste liquid is directly used in the electrolytic manganese acid leaching process, and the separated manganese (3) Digestion and stirring: add quicklime and water to the manganese slag after a pressure filter, and stir, and the ammonia gas generated during the stirring process is sent to the ammonia gas treatment system for treatment, and the quicklime is added The amount is 6% of the mass of manganese slag, the amount of water added is 200% of the mass of m...

Embodiment 3

[0028] Such as figure 1 As shown, a harmless treatment method for electrolytic manganese slag, including the following steps: (1) Washing and stirring: add water to the manganese slag filtered out of the electrolytic manganese plant for washing and stirring, and the ammonia gas generated during the washing and stirring process is transported to Ammonia gas treatment system for treatment; (2) Primary filter press: filter the manganese slag after washing and stirring with water to separate solid and liquid, and the separated waste liquid is directly used in the electrolytic manganese acid leaching process, and the separated manganese (3) Digestion and stirring: add quicklime and water to the manganese slag after a pressure filter, and stir, and the ammonia gas generated during the stirring process is sent to the ammonia gas treatment system for treatment, and the quicklime is added The amount is 5% of the mass of manganese slag, the amount of water added is 150% of the mass of m...

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Abstract

The invention provides a harmless treatment method and equipment for electrolytic manganese residues. The method comprises the steps of washing stirring, primary filter pressing, digestion stirring, secondary filter pressing, mixing stirring, ammonia gas treatment and aging treatment. According to the method, the water content of the electrolytic manganese residues obtained after water washing stirring and primary filter pressing is about 15%, residual soluble sulfate (about 30-60%) in the manganese residues obtained after water washing is eliminated through digestion stirring, and meanwhile overflowed ammonia gas is recycled; after digestion and stirring, the water content of the manganese slag is about 100%, the water content of the manganese slag after secondary filter pressing can reach about 20%, residual soluble sulfate (about 20-40%) after the first digestion reaction is removed through mixing and stirring, and meanwhile, overflowed ammonia gas is recycled; dry fine sand is added during mixing and stirring to increase friction force of the manganese slag, and the problem that the manganese slag adheres to equipment is solved. According to the method, a large amount of residual ammonium sulfate and soluble manganese sulfate in the electrolytic manganese residues are effectively removed, the water content of the manganese residue mixed material obtained after three times of stirring is about 10%, and the ammonium salt removal rate can reach 90% or above.

Description

technical field [0001] The invention relates to the field of resource utilization of electrolytic manganese slag, in particular to a harmless treatment method and equipment for electrolytic manganese slag. Background technique [0002] Electrolytic manganese slag is the second type of solid waste in general industrial solid waste. Its particles are small, non-magnetic, non-toxic, and insoluble in water. About 2 / 3 of the particles of manganese slag are less than 100 μm. The manganese slag after pressure filtration from the electrolysis plant is agglomerated (water content is generally 13%-16%) and has high viscosity. It is weakly acidic (pH is generally 4-6), and the sulfur content in the electrolytic slag is high and exists in various forms. Except that most of the sulfate exists in the form of dihydrate gypsum (accounting for about 15-18%), the other main It exists in the form of soluble sulfate (ammonium sulfate, magnesium sulfate and residual manganese sulfate, accountin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00B09B3/32B09B3/38B09B3/70
CPCB09B3/00B09B5/00Y02P10/20
Inventor 潘荣伟梁雅倩陈霏黎宇平李乃意
Owner 广西建筑材料科学研究设计院有限公司