Preparation method of iron-carbon micro-electrolytic filler

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. [...

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