Iron-carbon micro-electrolysis filler and preparing method thereof

Abstract

The invention relates to an iron-carbon micro-electrolysis filler. The iron-carbon micro-electrolysis filler is prepared from, by weight, 60-80wt% of fine iron powder, 10-25wt% of coal dust, 0.5-2wt%of a binder, 6-10wt% of an additive and 0.2-1wt% of a metal catalyst. The invention further relates to a preparing method of the iron-carbon micro-electrolysis filler. The preparing method comprises the steps that fine iron powder with the sieving particle size as 100 mesh or above and the TFe larger than 70%, the coal dust with 100 mesh, the binder, the additive and the metal catalyst are mixed and stirred according to a proportion to prepare a mixed material; the mixed material is fed into a disc granulator for pelletizing; spherical granules are dried; the dried spherical granules are loaded into a high-temperature-resistance tank for calcining; the spherical iron-carbon micro-electrolysis filler is taken out and packaged after detection. The iron-carbon micro-electrolysis filler has the advantages that the treatment effect is good, the production cost is low, the application range is wide, the treatment reaction speed is high, the effect is stable, and secondary pollution cannot becaused; the biodegradability of wastewater can be improved, the purpose of chemical precipitation for dephosphorization is achieved, settling of sludge is facilitated, and less sludge is generated bythe filler.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an iron-carbon micro-electrolytic filler and a preparation method thereof. Background technique [0002] In the micro-electrolysis process in sewage treatment, iron filings (or reduced iron particles) are often used as fillers, and the redox (electrochemical corrosion) effect of iron in water is used to remove pollutants in sewage and purify water quality. At present, the main problem of micro-electrolytic fillers is that iron filings (or reduced iron particles) fillers are prone to passivation (continuous and dense oxide film is formed on the surface of iron particles), hardening and clogging during use, which reduces the effect of micro-electrolysis. , cannot even continue running. The main reason is that the iron filings (or reduced iron particles) have a high purity filler, and generally the iron content is higher than 98%, and the content of carbon (cathode) in the...

AI Technical Summary

Problems solved by technology

At present, the main problem of micro-electrolytic fillers is that iron filings (or reduced iron particles) fillers are prone to passivation (continuous and dense oxide film is formed on the surface of iron particles), hardening and clogging during use, which reduces the effect of micro-electrolysis. , can't even continue running

The main reason is that the iron filings (or reduced iron particles) have a high purity filler, and generally the iron content is higher than 98%, and the content of carbon (cathode) in the iron particles is small, and the surface of the iron particles is prone to compaction during the corrosion process. The oxide film prevents the electrolysis process from continuing to proceed efficiently, produces passivation, and reduces the efficiency of micro-electrolysis

In order to improve the electrochemical reaction activity, when adding activated carbon (or coke) particles to increase the cathode, because the density of the external filler such as activated carbon (or coke) is lower than that of iron particles, it cannot be filled evenly in the actual use process, and local bluntness will still occur. harden

Backwashing will aggravate the heterogeneity of iron-carbon, accelerate the occurrence of passivation, hardening and clogging, and finally make the system unable to operate continuously