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Ceramsite filter material for aerated biological filter and preparation method thereof

A technology of biological aerated filter and ceramsite filter material, applied in ceramic products, applications, household appliances, etc., can solve the problems of reducing the use of soil resources, etc., to achieve small mud content, reduce pollution, and low soluble rate Effect

Inactive Publication Date: 2018-08-24
NORTHEASTERN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the existing technical problems, the present invention provides a ceramsite filter material for biological aerated filter, which not only solves the utilization problem of iron tailings and fly ash, but also purifies polluted water, and realizes the purpose of treating waste with waste. while reducing the use of land resources

Method used

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  • Ceramsite filter material for aerated biological filter and preparation method thereof
  • Ceramsite filter material for aerated biological filter and preparation method thereof

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preparation example Construction

[0044] refer to figure 1 , a kind of preparation method of ceramsite filter material for biological aerated filter, it comprises the following steps:

[0045] Step 1: iron tailings, fly ash, bonding agent are mixed according to the proportion mentioned in the biological aerated filter with ceramsite filter material;

[0046] Step 2: Add deionized water and a pore-forming agent to the uniformly mixed solid raw material, and stir again to obtain ceramsite raw material;

[0047] Step 3: Make the ceramsite raw material into raw material balls;

[0048] Step 4: Carry out graded roasting to raw meal ball;

[0049] Step 5: The finished ceramsite is obtained after the ceramsite roasted at high temperature is cooled.

[0050] In step 1, before the raw materials are mixed, it also includes pretreatment of the iron tailings and fly ash. The pretreatment process includes: placing the iron tailings raw materials and the fly ash raw materials in a drying box respectively, at 105 ° C Dry...

Embodiment 1

[0060] (1) Take the ceramsite raw material, dry it in a drying oven at 105°C for 3 hours, grind it after dehydration, sieve through a 150-mesh sieve, weigh 50% of iron tailings and 40% of fly ash according to the mass ratio, Kaolin 10%, total mass 1kg, mix well.

[0061] (2) Get the raw material in the step (1) and add the deionized water and the polyvinyl alcohol of 0.2 and 2ml of liquid / solid mass ratio, after mixing, put into the cement slurry mixer and mix evenly to obtain ceramsite raw meal.

[0062] (3) Take the ceramsite raw meal in step (2) and put it into a sugar coating machine to roll round pellets for 15 minutes to obtain 4-7 mm raw meal balls with uniform particle size.

[0063] (4) Take the raw material balls in step (3) and put them into a resistance furnace, keep warm at 500°C for 30 minutes, heat up at a rate of 10°C / min, and heat up to a roasting temperature of 1100°C for 5 minutes.

[0064] (5) Cool the ceramsite after high-temperature sintering with the fu...

Embodiment 2

[0067] (1) Take the ceramsite raw materials, dry them in a drying oven at 110°C for 2 hours, grind them after dehydration, and sieve through a 150-mesh sieve. Take by weight 60% of iron tailings, 30% of fly ash, 10% of kaolin, total mass 1kg, and mix.

[0068] (2) get the raw material in the step (1) and add liquid / solid mass ratio and be the deionized water of 0.3 and the polyvinyl alcohol of 1.5ml, put into the cement paste mixer after mixing evenly and mix homogeneously, obtain ceramsite raw meal.

[0069] (3) Take the ceramsite raw meal in step (2) and put it into a sugar coating machine to roll round pellets for 15 minutes to obtain 4-7 mm raw meal balls with uniform particle size.

[0070] (4) Take the raw material balls in step (3) and put them into a resistance furnace, keep warm at 400°C for 40 minutes, heat up at a rate of 10°C / min, and heat up to a roasting temperature of 1060°C for 10 minutes.

[0071] (5) Air-cool the ceramsite after high-temperature sintering to...

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Abstract

The invention belongs to the technical field of comprehensive mineral resource utilization and sewage purification treatment, and particularly relates to a ceramsite filter material for an aerated biological filter and a preparation method thereof. According to the preparation method of the ceramsite filter material, the ceramsite filter material is prepared by using iron tailing as a main raw material, adding fly ash, a bonding agent and a pore-forming agent, mixing, granulating and then roasting. The ceramsite filter material is rough and porous in surface and large in specific surface area,a biofilm is easily formed, and adsorption and removal of pollutants in water are facilitated; moreover, the ceramsite filter material is light in weight, low in mud content and low in hydrochloric acid solubility, can withstand a hydraulic impact for a long time, has good stability, and is an excellent aerated biological filter filler for sewage treatment. The raw material sources are rich, thecost is low, the preparation method is simple, a technology is environment-friendly, the current situation of serious water pollution in China is alleviated while environment pollution caused by improper disposal of the iron tailing is reduced, treatment wastes by wastes is achieved, and a new idea is provided for combination of comprehensive iron tailing utilization and sewage treatment.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of mineral resources and sewage purification treatment, and in particular relates to a ceramsite filter material for a biological aerated filter and a preparation method thereof. Background technique [0002] In recent years, the market price of iron concentrate has been rising continuously, and low-grade iron ore also has a certain mining value, especially in large state-owned and local key iron ore enterprises with strong awareness of resource utilization, mining of rich ore and low-grade ore at the same time , leading to the discharge of more iron tailings. However, the current utilization rate of iron tailings in my country is less than 17% of its growth rate, and it is very urgent to solve the economic, safety and environmental problems brought about by the massive accumulation of iron tailings. The production of ceramsite with iron tailings as raw material is one of the wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B33/135C04B33/132C04B33/04
CPCC04B33/04C04B33/132C04B33/1352C04B38/009C04B38/067C04B2235/95C04B2235/77C04B2235/6567C04B2235/6562C04B38/0074C04B38/0067Y02P40/60
Inventor 汪应玲罗绍华庄蕾李娜周一鸣李媛媛
Owner NORTHEASTERN UNIV
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