Preparation method for electrolytic manganese residue porous ceramics

A technology of porous ceramics and electrolytic manganese slag, which is applied in the direction of ceramic products, solid waste removal, and other household appliances to achieve the effect of improving material strength, high compressive strength, and simple process

Active Publication Date: 2012-07-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is no report on the preparation of porous ceramic materials with adsorption and filtration properties by using electrolytic manganese slag

Method used

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  • Preparation method for electrolytic manganese residue porous ceramics
  • Preparation method for electrolytic manganese residue porous ceramics
  • Preparation method for electrolytic manganese residue porous ceramics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 Limestone is porogen

[0032] Take 100 parts of leaching slag of manganese oxide ore and 10 parts of limestone, mix them evenly, put them into a steel mold, press them under a pressure of 8MPa for 3 minutes, take out the green body, let it dry naturally, put it into a high-temperature electric furnace, and change it from room temperature to 3°C The heating rate per minute was increased to 1100° C., heat-preserved and sintered for 1 hour, and taken out after cooling to obtain porous ceramics. The apparent porosity of porous ceramics is 39.58%, the water absorption rate is 23.43%, and the bulk density is 1.95g / cm 3 , the compressive strength is 36.22MPa, the acid resistance is 95.67%, and the alkali resistance is 99.13%.

Embodiment 2

[0033] Embodiment 2 Coal powder is porogen

[0034] Take 100 parts of manganese carbonate ore leaching slag, 25 parts of coal powder, mix them evenly, put them into a steel mold, press them under a pressure of 4MPa for 2 minutes, take out the green body, dry it naturally, put it into a high-temperature electric furnace, and heat it from room temperature to 3 The heating rate was raised to 1070°C at a rate of °C / min, held for 1 hour for sintering, and taken out after cooling to obtain porous ceramics. The apparent porosity of porous ceramics is 69.27%, the water absorption rate is 65.58%, and the bulk density is 1.05g / cm 3 , the compressive strength is 6.83MPa, the acid resistance is 90.02%, and the alkali resistance is 98.98%.

Embodiment 3

[0035] Embodiment 3 carbon powder is porogen

[0036] Take 100 parts of leaching slag of manganese oxide ore, 25 parts of carbon powder, mix them evenly, put them into a steel mold, press them under a pressure of 2MPa for 3 minutes, take out the green body, put it in an electric furnace and keep the temperature at 105°C to dry for 5 hours. Put it into a high-temperature electric furnace, raise the temperature from room temperature to 1070° C. at a rate of 3° C. / min, keep it for sintering for 1 hour, take it out after cooling, and obtain porous ceramics. The apparent porosity of the ceramic is 66.85%, the water absorption rate is 66.71%, and the bulk density is 1.04g / cm 3 , the compressive strength is 2.61MPa, the acid resistance is 92.42%, and the alkali resistance is 97.25%.

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Abstract

The invention relates to a preparation method for electrolytic manganese residue porous ceramics. The manganese residue is taken as aggregate; the additives, such as pore-forming agent, binding agent and fluxing agent, are added; and a porous ceramic material is prepared according to a mould pressing forming and solid-phase sintering method. The preparation method specifically comprises the following steps of: mixing the manganese residue, the pore-forming agent, the binding agent and the fluxing agent; adding water, and then mixing uniformly; pressing and forming by using a steel mould, thereby obtaining a green ware; and after drying, placing the green ware into a high-temperature electric furnace for sintering under the condition of temperature controlled by programs, thereby obtainingthe porous ceramics. According to the method provided by the invention, a plenty of manganese residues are efficiently utilized; the environmental pollution is reduced; the wastes are turned into valuable things; the method has the advantages of simple preparation process, low cost, and the like; and the prepared electrolytic manganese residue porous ceramics are high in strength and porosity andcan serve as excellent adsorbing materials and filtering materials.

Description

technical field [0001] The technical field of the present invention is the technical field of ceramic material preparation, and mainly relates to a preparation method of electrolytic manganese slag porous ceramics. Background technique [0002] As a strategic resource, manganese has an irreplaceable important position in the national economy. The output of electrolytic manganese in my country accounts for more than 95% of the world's output of electrolytic manganese, ranking first in the world. However, about 5-8 tons of electrolytic manganese slag are generated for every ton of electrolytic manganese produced. A large amount of manganese slag not only occupies a large area of ​​land, but also seriously pollutes the environment because it contains a certain amount of harmful substances and is washed away by rainwater. If it is not treated and utilized, it will be more harmful to the environment. [0003] At present, there are mainly several processing technologies for mang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00B09B3/00
Inventor 钟宏李雪萍王帅刘广义曹占芳
Owner CENT SOUTH UNIV
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