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Micro-electrolysis filler and preparation method thereof

A technology of micro-electrolysis and raw materials, applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, water/sewage treatment, etc., can solve the problem of heavy filler replacement workload, easy rust and hardening of iron filings, and filler accumulation High density and other problems, to achieve the effect of solving the difficulty of packing replacement, low production cost and high processing efficiency

Active Publication Date: 2017-06-13
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high packing density and low void ratio inside the iron-carbon bed, there is only a simple physical contact between the fillers, which is likely to cause frequent replacement of fillers and poor treatment effects and other practical problems: first, iron filings are prone to rust and compaction, Wastewater produces channeling in the reactor, resulting in dead zones and reduced efficiency; second, the replacement of fillers requires a lot of work and complicated operations; third, the surface of iron-carbon fillers is easily passivated, and the passivation film prevents the normal progress of the micro-electrolysis reaction

Method used

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  • Micro-electrolysis filler and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: The micro-electrolytic filler is prepared by the following specific process.

[0024] With 10 orders of blast furnace dry ash, 10 orders of converter fine ash, 10 orders of converter coarse ash, 10 orders of converter sludge, 10 orders of blast furnace upper and lower ash, and hydroxymethylcellulose sodium salt in a weight ratio of 33:24:14: 17:10:2 Mix evenly, add 10% water of raw material weight, stir and mix for 20 minutes, then press the mixture to shape by mechanical extrusion, pressure 3000N / mm, time 45s, get 40mm×30mm×20mm packing briquettes, put Dry in a drying oven at 105°C for 2 hours. Preheat for 4 minutes at 1000°C in the high-temperature reduction furnace, then put it in a constant temperature zone of 1300°C for 15 minutes, and pass the protective gas as N during the roasting and reduction process. 2 , the flow rate is 5L / min. The filler obtained by calcining and reducing is embedded in graphite powder and cooled to room temperature to obtai...

Embodiment 2

[0025] Embodiment 2: The micro-electrolytic filler is prepared by the following specific process.

[0026] With 5 orders of blast furnace dry ash, 5 orders of converter fine ash, 5 orders of converter coarse ash, 5 orders of converter sludge, 5 orders of blast furnace upper and lower ash, and hydroxymethylcellulose sodium salt in a weight ratio of 29:25:15: Mix evenly at 19:9:3, add water with 12% weight of raw materials, stir and mix for 15 minutes, then extrude the mixture with a pressure of 3200N / mm and time of 60s to obtain a packing briquette of 40mm×30mm×20mm, put Dry in a drying oven at 105°C for 2 hours. Preheat in the high temperature reduction furnace at 1000°C for 2 minutes, then place it in a constant temperature zone at 1250°C for 20 minutes, and pass the protective gas as N during the roasting and reduction process 2 , the flow rate is 5L / min. The filler obtained by calcining and reducing is embedded in graphite powder and cooled to room temperature to obtain t...

Embodiment 3

[0027] Embodiment 3: The micro-electrolytic filler is prepared by the following specific process.

[0028] With 10 orders of blast furnace dry ash, 5 orders of converter fine ash, 5 orders of converter coarse ash, 10 orders of converter sludge, 5 orders of blast furnace upper and lower ash, and hydroxymethyl cellulose sodium salt in a weight ratio of 26:26:15: 20:11:2 Mix evenly, add water with 11% weight of raw materials, stir and mix for 30 minutes, then mechanically extrude the mixture, press 3500N / mm, time 30s, get 40mm×30mm×20mm packing briquettes, put in Dry in a drying oven at 105°C for 2 hours. Preheat for 5 minutes at 1000°C in the high-temperature reduction furnace, then place it in a constant temperature zone at 1200°C for 25 minutes, and pass a protective gas of N during the roasting process. 2 , the flow rate is 5L / min. The filler obtained by calcining and reducing is embedded in graphite powder and cooled to room temperature to obtain the micro-electrolytic fil...

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Abstract

The invention discloses a micro-electrolysis filler and a preparation method thereof. The filler comprises the following raw materials in percentage by mass: 25-35% of blast furnace dry ash, 20-30% of converter fine ash, 10-15% of converter coarse ash, 10-20% of converter sludge, 8-12% of blast furnace oversize and undersize ash, and 2-4% of an adhesive. The filler is high in treatment efficiency when being used for industrial wastewater treatment, particularly treatment of metallurgical coking wastewater, the CODCr and toxicity of the wastewater can be reduced, and the wastewater biodegradability is improved. Moreover, the filler is difficult to harden and passivate in the using process, the sludge after reaction is not increased, and the reaction efficiency is high. The raw material of the filler is selected from metallurgical waste dust, the iron and carbon components in the metallurgical waste dust are fully utilized, the production cost of the filler is reduced, recycling of resources is realized, and the environmental pollution is reduced. According to the filler, the continuity and stability of a micro-electrolysis system are guaranteed, the replacement workload of the micro-electrolysis filler is reduced, the actual operation is simple, and the problem that the filler is difficult to replace is solved.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, in particular to a micro-electrolytic filler and a preparation method thereof. Background technique [0002] Micro-electrolysis technology is a technology that has been widely studied and developed in recent years. It has low selectivity to pollutants, good removal effect, wide application range, and can be applied to the treatment of various wastewater. [0003] The traditional micro-electrolysis filler mostly adopts the form of fixed bed, that is, the iron-carbon micro-electrolysis filler is packed in the reactor, and the wastewater flows through the reactor from top to bottom. However, due to the high packing density and low void ratio inside the iron-carbon bed, there is only a simple physical contact between the fillers, which is likely to cause frequent replacement of fillers and poor treatment effects and other practical problems: first, iron filings are prone to rust and compaction, W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/467
CPCC02F1/46104C02F1/467
Inventor 杨慧贤田京雷陈文刘洁史远葛晶晶任玲玲禹青霄禹继志
Owner HEBEI IRON AND STEEL
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