Preparation method of polarization modified iron-carbon micro-electrolysis material

Abstract

The invention relates to a preparation method of a polarization modified iron-carbon micro-electrolysis material, belonging to the technical field of water treatment. The preparation method of the material comprises the following steps of: firstly selecting low-carbon iron-steel material with 60-70% of iron content; then pulverizing the material into fine powder with 100-300 meshes by using a pulverizer; carrying out magnetic seperation processing on the fine powder so that the iron content of the fine powder be up to more than 90%; adding isocyanate to the material subjected to magnetic seperation at the condition of 1500 DEG C temperature, and merging nanometer attapulgite in the material at the forming step; after reacting for 15min, adding dimethyl silicon oil, stirring for 15min, and cooling the temperature to a room temperature; and pulverizing the cooled material by using the pulverizer till obtaining the particles with 20-120 meshes, thereby obtaining the polarization modified iron-carbon micro-electrolysis material provided by the invention. The micro-electrolysis material provided by the invention has the advantages of cyclic utilization, large specific surface area, non-pollution, fast reaction speed and low operation cost.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a polarization-modified iron-carbon micro-electrolytic material and a preparation method thereof. Background technique [0002] In the process of refractory sewage treatment, the iron-carbon micro-electrolysis method has been widely used in practice. At present, most of the existing traditional iron-carbon micro-electrolysis at home and abroad is to mix iron-carbon in a certain proportion and add it to the reactor at one time, that is, to form a fixed-bed iron-carbon reactor. The main mechanism of action is to put iron-carbon mixed particles into the reactor. In the water to be treated, due to the potential difference between iron and carbon particles, a large number of micro-batteries will be formed in the water to be treated, in which the iron with low potential is the anode and the carbon with high potential is the cathode. Under the action of ions, the mo...

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Problems solved by technology

[0003] However, there are many defects in practice: the iron content of scrap iron scraps is low, and the Fe2+ and Fe3+ ions dissolved during the reaction are relatively small, which leads to the ineffective and sufficient reaction of the original battery and electrochemical enrichment, resulting in the traditional iron-carbon micro-electrolysis The treatment effect is low; the cutting of waste is difficult, resulting in different specifications of iron raw materials and large specific gravity, uneven mixing with activated carbon, and easy compaction; for larger sewage treatment projects, iron filings or steel filings are often used. Packing into a certain cuboid and filling with activated carbon in layers will not only lead to uneven mixing of iron and carbon and affect the reaction effect, but more importantly, after a period of operation, the cuboid iron filings or steel filings will collapse and local compaction will occur. The water flow cannot pass through evenly, so that the reaction pool is scrapped

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