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Powder metallurgy iron-based catalyzed internal electrolysis filler and preparation method thereof

A technology of powder metallurgy and internal electrolysis, applied in chemical instruments and methods, separation methods, water/sludge/sewage treatment, etc., can solve the problem of blocking the mass transfer process of pollutants and fillers, affecting backwashing and supplementary replacement of fillers, Affecting processing efficiency and other problems, to overcome the problem of packing passivation, low equipment investment and operating costs, and simple preparation process

Inactive Publication Date: 2016-06-29
TONGJI UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

After the existing internal electrolytic filler is used for a period of time, a passivation film will be formed on the surface, blocking the mass transfer process between pollutants and the filler, thus affecting the treatment efficiency
(2) hardening phenomenon
Electrochemical corrosion of iron-carbon fillers is prone to hardening at the same time, resulting in channeling, thereby reducing the effective contact area between fillers and wastewater, resulting in a decline in treatment effect, and also affecting backwashing and supplementary replacement of fillers
(3) Low efficiency and short life
Commercially available iron-carbon fillers consume iron rapidly during use, and the iron-carbon ratio decreases, resulting in a decrease in electrochemical performance and poor treatment effect; at the same time, a large amount of carbon is lost during use, resulting in a short service life of iron-carbon fillers

Method used

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  • Powder metallurgy iron-based catalyzed internal electrolysis filler and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Preparation of powder metallurgy iron-based catalytic internal electrolytic filler and its treatment of coking wastewater

[0027] The powder metallurgy iron-based catalytic internal electrolytic filler whose composition is Fe3C0.2Cu0.2Ni (mass fraction, the same below) is prepared. The raw materials used are gas-atomized iron powder with a particle size of 100~200 mesh, activated carbon powder with a particle size of 100~200 mesh, and a particle size of 100~200 mesh. 200 mesh electrolytic copper powder, 100~200 mesh electrolytic nickel powder. The raw material powder is weighed according to the composition ratio, and the powder is placed in a high-energy ball mill for ball milling until the powder is refined to the nanometer scale. The ball mill pot and balls are all stainless steel, the mass ratio of ball to material is 10:1, the diameter of balls is 6, 10 and 15mm, the mass ratio is 1:4:1, the milling time is 20h, and the speed of ball mill is 210r / min. Put the unif...

Embodiment 2

[0030] Preparation of powder metallurgy iron-based catalytic internal electrolytic filler and its treatment of pulping wastewater

[0031] The powder metallurgy iron-based catalytic internal electrolytic filler whose composition is Fe3C0.2Cu0.2Ni is prepared. The raw materials used are gas atomized iron powder with a particle size of 100~200 mesh, activated carbon powder with a particle size of 100~200 mesh, electrolytic copper powder with a particle size of 100~200 mesh, and 100~200 mesh electrolytic nickel powder. The raw material powder is weighed according to the composition ratio, and the powder is placed in a high-energy ball mill for ball milling until the powder is refined to the nanometer scale. The ball mill pot and balls are all stainless steel, the mass ratio of ball to material is 10:1, the diameter of balls is 6, 10 and 15mm, the mass ratio is 1:4:1, the milling time is 20h, and the speed of ball mill is 210r / min. Put the uniformly mixed powder into a mold, and ...

Embodiment 3

[0034] Preparation of powder metallurgy iron-based catalytic internal electrolytic filler and its treatment of printing and dyeing wastewater

[0035] The powder metallurgy iron-based catalytic internal electrolytic filler whose composition is Fe3C0.2Cu0.2Ni is prepared. The raw materials used are gas atomized iron powder with a particle size of 100~200 mesh, activated carbon powder with a particle size of 100~200 mesh, electrolytic copper powder with a particle size of 100~200 mesh, and 100~200 mesh electrolytic nickel powder. The raw material powder is weighed according to the composition ratio, and the powder is placed in a high-energy ball mill for ball milling until the powder is refined to the nanometer scale. The ball mill pot and balls are all stainless steel, the mass ratio of ball to material is 10:1, the diameter of balls is 6, 10 and 15mm, the mass ratio is 1:4:1, the milling time is 20h, and the speed of ball mill is 210r / min. Put the uniformly mixed powder into ...

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Abstract

The invention relates to the powder metallurgy technology, in particular to powder metallurgy iron-based catalyzed internal electrolysis filler and a preparation method thereof. The powder metallurgy iron-based catalyzed internal electrolysis filler is obtained by weighing iron powder, activated carbon powder, copper powder and nickel powder which are each of a certain particle size according to weight percentage of all components, evenly mixing the powder and refining the powder into the nanometer scale through a ball milling method, pressing the powder into a green body of a certain shape through the compression molding process, putting the green body in an industrial mesh belt sintering furnace to be sintered and conducting natural cooling in the furnace. The technological process is simple, and compared with existing internal electrolysis filler, the prepared powder metallurgy filler has the advantages of being stable in electrochemical effect, high in processing efficiency, low in loss rate, high in material finished product rate and easy to process.

Description

technical field [0001] The invention relates to a powder metallurgy catalytic internal electrolysis filler, in particular to an iron-based powder metallurgy filler for catalyzing an internal electrolysis reaction and a preparation method thereof. Background technique [0002] Catalytic internal electrolysis is a sewage treatment technology developed from the principle of primary battery reaction. The catalytic internal electrolysis method can form a potential difference between the two electrodes without an external power source to generate an electrochemical reaction. Through the comprehensive action of microelectronics and non-stable ions, It effectively removes macromolecules, toxic and harmful substances, and biodegradable substances while improving the biodegradability of wastewater. It has the characteristics of wide application range, high treatment efficiency and easy operation. The iron-based catalytic internal electrolysis technology uses the iron-carbon internal e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/463C02F1/467C02F1/469
CPCC02F1/461C02F1/46176C02F1/463C02F1/467C02F1/469C02F1/4696
Inventor 潘碌亭王九成董恒杰
Owner TONGJI UNIV
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