Preparation method of iron-carbon micro-electrolysis filler for retarding formation of isolating layer through rare earth carbonization

Abstract

The invention discloses a preparation method of an iron-carbon micro-electrolysis filler for retarding formation of an isolating layer through rare earth carbonization. The preparation method comprises the following steps: mixing and sintering metal powder; grinding a mixed metal block; preparing paste; coating and carbonizing; and pelleting. The iron-carbon micro-electrolysis filler is reasonable in design, grains of an electrolytic coating are refined, uniform and compact, formation of large grains of the electrolytic coating is reduced, formation of an isolating layer is slowed down, the service life of the iron-carbon micro-electrolysis filler is prolonged, meanwhile, the used iron-carbon micro-electrolysis filler can be decomposed under the action of deliquescent scandium chloride powder in air, hardening after cleaning and stacking is avoided, the porous firmness performance of the surface of the iron-carbon micro-electrolysis filler can be improved by adopting a mold pelleting mode, the outermost surface of the iron-carbon micro-electrolysis filler does not contain metal elements, and the condition of bonding hardening between the iron-carbon micro-electrolysis filler caused by metal passivation can be avoided.

Description

technical field [0001] The present application relates to the field of iron-carbon micro-electrolytic fillers, in particular to a method for preparing iron-carbon micro-electrolytic fillers for the formation of rare earth carbonization slowing barrier layers. Background technique [0002] Iron-carbon micro-electrolysis is a good process for treating wastewater by using the principle of metal corrosion to form a primary battery, also known as internal electrolysis, iron filings filtration, etc. Micro-electrolysis technology is currently an ideal process for treating high-concentration organic wastewater. Also known as the internal electrolysis method, it uses the micro-electrolysis material filled in the wastewater to generate a 1.2V potential difference to electrolyze the wastewater to achieve the purpose of degrading organic pollutants without electricity. [0003] In the iron-carbon micro-electrolysis treatment of wastewater with iron-carbon micro-electrolysis fillers, the...

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Problems solved by technology

[0003] In the iron-carbon micro-electrolysis treatment of wastewater with iron-carbon micro-electrolysis fillers, the electrolysis between iron and carbon forms electrolytic coating grains with large grains, resulting in a relatively fast formation of the isolation layer, and then the iron-carbon micro-electrolysis fillers cannot be reused. At the same time, the iron-carbon micro-electrolytic fillers are easily bonded together during the electrolysis process, causing hardening, and the iron-carbon micro-electrolytic fillers that have been cleaned out and piled up also bring inconvenience to subsequent processing.