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Structured iron-carbon micro-electrolysis filling material and preparation method thereof

A technology of iron-carbon micro-electrolysis and iron fine powder, which is applied in chemical instruments and methods, processing process wastewater treatment, food industry wastewater treatment, etc., can solve the problems of papermaking sludge disposal in papermaking enterprises, complex composition of papermaking sludge, fillers, etc. High cost of raw materials and other issues, to achieve the effect of improving electron transfer efficiency, improving internal electrolysis efficiency, and stabilizing treatment effect

Active Publication Date: 2016-03-02
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still the following problems: the cost of filler raw materials is high, the product price is high, and the cost of water treatment is increased; the sintering temperature is low, the filler structure is loose, and the loss is fast during wastewater treatment; the production of conventional iron-carbon fillers directly uses commercially available metal iron powder, Commercially available metal iron powder is passivated due to surface oxidation, and is directly applied to fillers, with low activity and low current density
[0004] Papermaking sludge is the solid waste left over from the treatment of papermaking wastewater. For every ton of paper produced, about 1.2 tons of sludge with a water content of 80% will be produced. Papermaking sludge has complex components, high water content, and difficult treatment, and its disposal costs will increase. Accounting for more than 50% of the total cost of papermaking wastewater treatment, the disposal of papermaking sludge has become a problem that plagues the operation of papermaking enterprises

Method used

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  • Structured iron-carbon micro-electrolysis filling material and preparation method thereof
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  • Structured iron-carbon micro-electrolysis filling material and preparation method thereof

Examples

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Embodiment 1

[0033] A method for preparing a regularized iron-carbon micro-electrolysis filler. The preparation method uses fine iron powder and bituminous coal powder as raw materials, uses dried and pulverized papermaking sludge as a pore-forming agent, uses copper powder as a catalyst, and adds viscose Agglomerates, mixed evenly, pressed into shape, and dried to obtain dry spherical fillers, and the iron fine powder in the dry spherical fillers was directly reduced by high-temperature roasting to generate anode metal iron, and iron-carbon micro-electrolytic fillers were prepared.

[0034] The fine iron powder used in the present invention is the product obtained through the purification of iron-containing minerals in the iron ore mine through the beneficiation process, and its main components are various iron oxides; while the preparation technology of conventional iron-carbon micro-electrolytic fillers uses commercially available iron powder, Commercially available iron powders are pron...

Embodiment 2

[0057] Mix iron concentrate powder, coal powder, papermaking sludge, copper powder and sodium silicate uniformly according to the mass ratio of 50:25:15:2:8, then adjust the moisture content of the mixture to 10%, and press it with high-pressure ball pressing equipment Form ellipsoidal wet filler balls with a diameter of 15mm, and dry them in a dryer at 80°C, place the dry filler balls in a high-temperature furnace isolated from air, bake them at 1230°C for 3 hours, and cool them down to below 400°C with air isolation , take out and cool naturally, and prepare regularized iron-carbon micro-electrolytic packing. The prepared filler has an iron-carbon integrated, porous honeycomb regular structure, the mass ratio of iron to carbon is 4.1:1, and the internal porosity is 54%.

[0058] Apply the regularized iron-carbon micro-electrolysis filler prepared in this example to treat simulated heavy metal wastewater containing lead and copper ions. The initial concentrations of lead and ...

Embodiment 3

[0060] The fine iron powder for ironmaking that has passed through a 200-mesh sieve, the bituminous coal powder that has passed through 200 mesh, the dried and pulverized papermaking sludge that has passed through 100 mesh, copper powder and bentonite that have passed through 200 mesh according to the mass ratio of 58:20:15:2: 5 Mix evenly to obtain the mixture, then adjust the moisture content of the mixture to 15%, press the mixture into an ellipsoidal wet ball filler with a diameter of 20mm, and dry the wet filler ball under a dryer Dry to obtain dry ball fillers, the drying temperature is 90°C, place the dry ball fillers in a high-temperature furnace isolated from air, and bake them at 1250°C for 2.5 hours, then cool them down to below 400°C with air isolation, take them out and cool them naturally, A regularized iron-carbon micro-electrolytic filler is prepared. The prepared iron-carbon micro-electrolytic filler has iron-carbon integrated, porous honeycomb regular structu...

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Abstract

The invention belongs to the technical field of environmental engineering materials and particularly relates to a structured iron-carbon micro-electrolysis filling material and a preparation method thereof. The preparation method comprises the steps of treating fine iron powder and bituminous coal powder as raw materials, treating paper mill sludge which is dried and pulverized as a pore-forming agent, treating copper powder as a catalyst, adding a binding agent, mixing the ingredients uniformly, conducting compression formation, drying the ingredients, obtaining a dry-bulb filling material, generating anode metal iron by conducting direct reduction on the fine iron powder in the dry-bulb filling material through high temperature roasting, and obtaining the iron-carbon micro-electrolysis filling material. The granularity of the anode metal iron of the iron-carbon micro-electrolysis filling material is less than 10 micrometers. The structured iron-carbon micro-electrolysis filling material has the advantages that iron and carbon are integrated, the filling material is of a micropore framework type alloy structure, the porosity is high, the activity is high, the current density is large, when the filling material is applied to industrial waste water treatment, COD and chromaticity of waste water can be effectively lowered, biodegradability of the waste water can be effectively improved, various heavy metal ions can be removed, and the filling material is stable in operation and application effect.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering materials, and in particular relates to a regularized iron-carbon micro-electrolytic filler and a preparation method thereof. Background technique [0002] Micro-electrolysis technology is a process that applies electrochemical principles to treat wastewater, also known as internal electrolysis. It uses a potential difference of 1.2V between the anode (iron) and the cathode (carbon) to treat pollutants, especially for high concentrations of organic matter, The treatment of highly toxic, high chroma, and biochemically difficult wastewater can greatly reduce the chroma and COD of wastewater, and improve its biodegradability; in addition, micro-electrolysis technology can also absorb and reduce various heavy metal ions, so micro-electrolysis technology is widely used It is suitable for the treatment of various industrial wastewaters such as printing and dyeing, papermaking, chemical...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F103/28C02F103/32C02F103/34
CPCC02F1/461C02F2103/28C02F2103/325C02F2103/34
Inventor 傅平丰杨天文
Owner UNIV OF SCI & TECH BEIJING
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