Spherical catalytic microelectrolytic environment-friendly material and preparation method therefor

An environmentally friendly material, micro-electrolysis technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc.

An environmentally friendly material, micro-electrolysis technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc.

CN105084470AInactive Publication Date: 2015-11-25GUANGZHOU S SUNNY ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Spherical catalytic microelectrolytic environment-friendly material and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 130-147 parts of fine iron powder, 25-29 parts of coal, 1-5 parts of catalyst, 1-3 parts of sintering agent

[0025] Example 1 Grind dry iron concentrate (grade 60), coal (grade 5000 cal or more), specially made cerium dioxide, and sodium tetraborate to 200 mesh respectively, and sieve them for later use; weigh the prepared raw materials by weight Mix 130 parts of fine iron powder, 29 parts of coal, 5 parts of catalyst, and 3 parts of sintering agent; granulate the uniformly mixed fine material into small balls with a diameter of 12 to 16 mm, dry and dehydrate, pack into cans, and heat up in a reducing atmosphere Sinter at 1000-1050 degrees Celsius for 4 hours, then cool out of the tank and serve. The product composition is: zero-valent active iron (78wt.%), carbon (14wt.%), catalyst (5wt.%).

Embodiment 2

[0026] Example 2 Grind dry iron concentrate (grade 60), coal (grade 5000 cal or more), specially made cerium dioxide, and sodium tetraborate to 200 mesh respectively, and sieve them for later use; weigh the prepared raw materials by weight Mix 140 parts of fine iron powder, 27 parts of coal, 3 parts of catalyst, and 2 parts of sintering agent; granulate the uniformly mixed fine material into small balls with a diameter of 12 to 16 mm, dry and dehydrate, pack into cans, and heat up in a reducing atmosphere Sinter at 1000-1050 degrees Celsius for 4 hours, then cool out of the tank and serve. The product composition is: zero-valent active iron (84wt.%), carbon (12wt.%), catalyst (3wt.%).

Embodiment 3

[0027] Example 3 Grind dry iron concentrate (grade 60), coal (grade 5000 cal or more), specially made cerium dioxide, and sodium tetraborate to 200 mesh respectively, and sieve them for later use; weigh the prepared raw materials by weight Mix 147 parts of fine iron powder, 25 parts of coal, 1 part of catalyst, and 1 part of sintering agent; granulate the uniformly mixed fine material into small balls with a diameter of 12 to 16 mm, dry and dehydrate, pack into cans, and heat up in a reducing atmosphere Sinter at 1000-1050 degrees Celsius for 4 hours, then cool out of the tank and serve. The product composition is: zero-valent active iron (88wt.%), carbon (10wt.%), catalyst (1wt.%).

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Abstract

The invention relates to a spherical catalytic microelectrolytic environment-friendly material and a preparation method therefor. Aiming at the defects such as low reaction speed, low COD (Chemical Oxygen Demand) removal ratio, easiness in passivating and the like of the existing iron-carbon microelectrolytic materials, a special catalyst is added during the production of the spherical catalytic microelectrolytic environment-friendly material disclosed by the invention, the spherical catalytic microelectrolytic environment-friendly material is mainly prepared from 78-88wt.% of zero-valence active iron, 10-14wt.% of carbon, 1-5wt.% of catalyst and 1-3wt.% of auxiliary materials, is an iron, carbon and catalyst integrated composite spherical material and is prepared from fine iron powder, coal, the catalyst and a sintering agent through carrying out grinding and sieving, carrying out mixing and pelletizing, carrying out drying and canning, carrying out high-temperature reduction sintering and carrying out cooling and can discharging, wherein the catalyst is special compounded ceria, and the sintering agent is sodium tetraborate. During the treatment of a variety of high-concentration and toxic wastewater such as pharmaceutical wastewater, coking wastewater, petrochemical wastewater and the like, the reaction speed and COD removal ratio of the spherical catalytic microelectrolytic environment-friendly material are increased by 20-30% through the catalyst compared with those of the ordinary iron-carbon microelectrolytic materials.

Description

technical field [0001] The invention relates to a micro-electrolysis iron-carbon material used for sewage treatment, in particular to a spherical catalytic micro-electrolysis iron-carbon environmental protection material and a preparation method thereof. technical background [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. The basic principle is that iron particles form countless tiny primary batteries in sewage, in which iron is the anode that loses electrons, and coal is added as the cathode to make the cations in the water gain electrons. The electrode process is as follows: [0003] Anode reaction: [0004] Fe-2e→Fe 2+ E. 0 (Fe 2+ / Fe)=-0.44V [0005] Further oxidation of Fe 2+ -e → Fe 3+ [0006] Cathode reaction: [0007] h + +e→H [0008] Further ...

Claims

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Application Information

Patent Timeline
25 Nov 2015
Publication
CN105084470A
IPC
C02F1/463
Inventors
李小琴