Preparation method of iron-carbon micro-electrolytic filler

An iron-carbon micro-electrolysis and microsphere technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc. Renewing, affecting the effect of electrolysis reaction and other issues, to achieve the effect of easy operation, cost saving and easy recovery

Active Publication Date: 2021-03-26
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, a large number of research results show that there are many defects in the application of this method. For example, after the filler has been running for a period of time, it is prone to agglomeration and channeling due to the corrosion of iron, which reduces the treatment effect of the iron-carbon micro-electrolytic filler, or the iron is completely consumed. Finally, the carbon layer is difficult to peel off, which will cause the carbon layer and iron oxidation products to be heavily wrapped on the surface of the filler. Simple washing is difficult to ensure the immediate renewal of the product surface, resulting in a decline in the reaction effect
[0005] Patent 201010150149.X discloses a method for preparing regular iron-carbon micro-electrolytic fillers. In this preparation method, iron powder and carbon powder are directly mixed and calcined at high temperature, and the diameters of the components iron powder, clay and carbon powder are limited to avoid filler Hardening and passivation problems, but the fillers generated by this method are closely bonded together with iron and carbon elements, causing a lot of mutual movement interference between particles, which will seriously affect the waste removal effect of the electrolytic reaction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 67 parts of iron powder, 3 parts of aluminum slag and 9 parts of copper filings, use the hydrochloric acid that concentration is 5% to carry out flushing activation, wherein iron powder is 120 orders, and the diameter of aluminum slag and copper filings is 0.1 millimeter; Mix powder and aluminum slag with 4 parts of surfactant, put them into a mixer, add water and stir, the stirring speed is 20 rpm, and the stirring time is 15 minutes, and then put it into a granulator to make iron-aluminum coarse powder with a diameter of 1 mm. Put the iron-aluminum coarse grains into the muffle furnace for roasting at 350°C for 1.5 hours to prepare iron-aluminum microspheres, mix the rinsed copper powder with 15 parts of activated carbon powder and put it into the mixer Add water and stir, the activated carbon powder is 120 mesh, the stirring speed is 30 rpm, and the stirring time is 7 minutes, then put it into a granulator to make copper carbon coarse particles with a diameter of ...

Embodiment 2

[0029] Get 70 parts of iron powder, 11 parts of aluminum slag and 3 parts of copper filings, use the hydrochloric acid that concentration is 7% to carry out flushing activation, wherein iron powder is 180 orders, and the diameter of aluminum slag and copper filings is 0.5 millimeter; Mix powder and aluminum slag with 8 parts of surfactant, put them into a mixer, add water and stir, the stirring speed is 30 rpm, and the stirring time is 5 minutes, and then put it into a granulator to make iron-aluminum coarse powder with a diameter of 1.2 mm. Put the iron-aluminum coarse particles into the muffle furnace and bake them at 400°C for 0.5 hours to make iron-aluminum microspheres, mix the washed copper powder with 27 parts of activated carbon powder and put it into the mixer Add water and stir, the activated carbon powder is 180 mesh, the stirring speed is 50 rpm, and the stirring time is 10 minutes, then put it into a granulator to make copper carbon coarse particles with a diameter...

Embodiment 3

[0032]Get 69 parts of iron powder, 5 parts of aluminum slag and 4 parts of copper filings, use the hydrochloric acid that concentration is 3% to carry out flushing activation, wherein iron powder is 150 orders, and the diameter of aluminum slag and copper filings is 0.3 millimeter; Mix powder and aluminum slag with 5 parts of surfactant, put it into a mixer, add water and stir, the stirring speed is 20 rpm, and the stirring time is 10 minutes, and then put it into a granulator to make iron-aluminum coarse powder with a diameter of 0.8 mm. Put the iron-aluminum coarse grains into the muffle furnace for roasting, the roasting temperature is 350°C, and the time is 0.5 hours, and the iron-aluminum microspheres are prepared, and the washed copper powder is mixed with 21 parts of activated carbon powder and put into the mixer Add water and stir, the activated carbon powder is 180 mesh, the stirring speed is 40 rpm, and the stirring time is 7 minutes, then put it into a granulator to ...

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Abstract

The invention relates to a preparation method of iron-carbon micro-electrolysis filler, which includes the following steps: mixing iron powder, aluminum slag and a surfactant and performing granulation and roasting to prepare iron-aluminum microspheres; mixing copper chip and carbon powder and performing granulation and roasting to prepare copper-carbon microspheres; mixing the iron-aluminum microspheres and copper-carbon microspheres with perlite, micalex, vermiculite and kaolin and compressing the mixture to form a filler green body; calcining the filler green body at high temperature to produce the iron-carbon micro-electrolysis filler. The iron-carbon micro-electrolysis filler can reach more than 93% in porosity, is uniform in pore diameter being controlled within 1.0-1.8 mm, and is high in removal rate of COD in sewage, which satisfies treatment standard of green ecological city.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a preparation method of an iron-carbon micro-electrolytic filler. Background technique [0002] "Smart city" is to make full use of various modern information processing technologies in all aspects of urban operation and development, to make urban management more scientific, to make citizens' lives better, to make economic development more competitive, and to maintain sustainable urban development. At this stage, the construction of smart cities in the world depends on the different levels of economic development and geographical regions, and the focus of urban construction is different. Green ecological and cultural cities are one of the important branches. How to adopt sustainable urban solutions is the key to winning the city Sustainable development while maintaining the balance between environmental protection and economy is the focus of this type of smart city. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461
CPCC02F1/461
Inventor 陈建荣周敏方克明仲淑贤
Owner ZHEJIANG NORMAL UNIVERSITY
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