High-carbonaceous metallized pellet for treating waste water and preparation method

A technology for metallized pellets and wastewater treatment, which is applied in electrochemical water/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the unstable treatment effect of organic wastewater, reduce the degradation rate of pollutants, and reduce the electron transfer rate and other problems, to achieve the effects of easy fluidization, accelerated mass transfer rate, and reduced concentration

Active Publication Date: 2008-06-18
唐山助纲炉料有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some disadvantages in the iron-carbon internal electrolysis process: ①The treatment effect for high-concentration and refractory organic wastewater is unstable; ②After a period of operation, due to the passivation of the surface of the iron filing filler and rust into solids, the wastewater treatment effect is significantly reduced
As we all know, the price of copper is expensive, which will inevitably lead to an increase in the cost of wastewater treatment
In addition, the contact area between copper shavings and iron...

Method used

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  • High-carbonaceous metallized pellet for treating waste water and preparation method

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Embodiment 1

[0035] Weigh the raw materials according to weight percentage: 60% of iron concentrate powder, 30% of coal powder, and 10% of bentonite; each raw material is mixed evenly and crushed into a powder with a particle size of 100 mesh; Balls, the diameter of the balls is controlled at 2-10 mm; the pellets are put into a drying oven to dry; the dried pellets are reduced at 1050° C. for 2 hours, and cooled naturally.

Embodiment 2

[0037] Raw materials are weighed according to weight percentage: 40% of iron concentrate powder and rich ore powder, 50% of coal powder and sawdust, 10% of starch and clay; each raw material is mixed evenly and crushed into a powder with a particle size of 100 mesh; the pulverized The raw materials are pelletized by adding water in a disc pelletizer, and the diameter of the pellets is controlled at 2-10mm; the pellets are naturally dried; the dried pellets are reduced at 1200°C for 1.5 hours, and then cooled naturally.

Embodiment 3

[0039] Raw materials are weighed according to weight percentage: 70% of rolled iron scale, 20% of anthracite and chaff, 10% of bentonite and starch; the raw materials are mixed evenly and pulverized into powder with a particle size of 100 mesh; Add water to the ball machine to form pellets, and the diameter of the balls is controlled at 2-10mm; the pellets are placed in a drying oven to dry; the dried pellets are reduced at 800°C for 3 hours, and then cooled naturally.

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Abstract

The invention relates to a preparation method of high carbon metalized pellet for waste water treatment, belonging to a technical field of metallurgical products, which is used to solve the problem that the surface passivation is easy to be generated in the material filtering in iron carbon by the method of electrolysis so as to affect waste water treatment effect. The invention is characterized in that: the high carbon metalized pellet contains single iron, activated carbon and few impurities, wherein the particle diameter of the single iron is less than 0.2mm, the activated carbon is a pore structure, the specific surface area reaches 500-800 square meter per gram. The method of the invention is composed of raw material preparation, pellet building, drying, reduction and other steps. Experiments evidence: the product in the invention has rich pore structures and huge specific surface, and has strong capability of absorbing contaminations in waste water, moreover the product has higher reaction activities, good osmosis, easy fluidization and no agglomeration. Compared with the conventional electrolysis process, the COD removal ratio of the used filling is improved by above 50 percent under equal time, the waste water with large variable concentration and wide PH value range can be treated.

Description

technical field [0001] The invention relates to a waste water treatment filter tank filler and a preparation method thereof, in particular to a high-carbon metallized pellet and a preparation method thereof, belonging to the technical field of metallurgical products. Background technique [0002] In recent years, with the rapid development of printing and dyeing, chemical, pharmaceutical, paper and other industries, the discharge of industrial wastewater is increasing day by day. Such industrial wastewater often contains a large number of refractory organic pollutants (such as nitro, gum, heterocyclic and other compounds) and harmful heavy metal ions (such as Cr 6+ , Cu 2+ , Ni 2+ etc.), have poor biodegradability and high toxicity, which pose a serious threat to the ecological environment. At present, wastewater with strong toxicity to organisms is not suitable for direct biological treatment. Instead, physical and chemical methods such as flocculation precipitation, che...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F1/52
Inventor 蒋武锋郝素菊
Owner 唐山助纲炉料有限公司
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