Bamboo-charcoal-shaped porous ceramsite coated by zero-valent iron as well as preparation method and application of bamboo-charcoal-shaped porous ceramsite

An iron-coated and bamboo charcoal technology is applied in the field of coated bamboo charcoal porous ceramsite and its preparation, which can solve the problems of single type of pollutants, low physical strength of products, and high cost of production raw materials, and achieves simple production process conditions and high processing efficiency. The effect of good effect and low energy consumption cost

Active Publication Date: 2015-01-21
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to aim at the complex preparation process, long reaction time, large energy consumption, high production raw material cost, and low physical strength of the product in the current production process of coated bamboo charcoal ceramsite in my country, which is not conducive to the treatment of pollutants with complex environments. And to deal with the problems of relatively single types of pollutants, a zero-valent iron-coated bamboo charcoal-based porous ceramsite and its preparation method and application are provided, which are prepared by combining surface-activated bamboo chips and porous ceramsite preparation technology Zero-valent iron-coated bamboo charcoal-based porous ceramsite products have good physical strength, do not need to add sintering aids or binders, have strong adaptability to strong acid and strong alkali environments, and can handle various types of pollutants. Biodegradable waste gas and waste water such as phenolic waste water, emulsified oil waste water, banknote printing and dyeing waste water have good treatment effects; the production process conditions are simple, the production and preparation energy consumption is low, and it is a biomass resource, pollution-free and environmentally friendly production Technology, easy to promote and use

Method used

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  • Bamboo-charcoal-shaped porous ceramsite coated by zero-valent iron as well as preparation method and application of bamboo-charcoal-shaped porous ceramsite
  • Bamboo-charcoal-shaped porous ceramsite coated by zero-valent iron as well as preparation method and application of bamboo-charcoal-shaped porous ceramsite
  • Bamboo-charcoal-shaped porous ceramsite coated by zero-valent iron as well as preparation method and application of bamboo-charcoal-shaped porous ceramsite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Raw materials and dosage

[0039] Bamboo chips: 12 kg

[0040] Surfactant: 8 kg

[0041] Porogen: 11 kg

[0042] Clay: 12kg

[0043] Bentonite: 13kg

[0044] α-Al 2 o 3 : 16 kg

[0045] Water: 15kg

[0046] Acidifier: 1 kg

[0047] Covering material: 8 kg

[0048] Coated reducing agent: 4 kg

[0049] 2. Process steps

[0050] (1) Surface activation: After crushing 12 kg of dried bamboo chips, put them into 8 kg of surfactant, stir at 80°C for 1 h, remove the moisture by suction filtration, and obtain surface-activated bamboo chips after drying.

[0051] (2) Preparation: The surface-activated bamboo chips prepared in step (1), 16 kg α-Al 2 o 3 , 11 kg of pore-forming agent, 12 kg of clay, 13 kg of bentonite and 15 kg of water were mixed in proportion and formed into balls to obtain ceramsite with a particle size of 6 mm. After drying, carbonize at 400 °C for 0.5 h, activate at 600 °C for 1 h, cool to 50 °C, immerse in 1 kg of acidifier and stir for 1 h, ne...

Embodiment 2

[0058] 1. Raw materials and dosage

[0059] Bamboo chips: 13.5 kg

[0060] Surfactant: 6.5 kg

[0061] Porogen: 10 kg

[0062] Clay: 13kg

[0063] Bentonite: 13kg

[0064] α-Al 2 o 3 : 16 kg

[0065] Water: 15kg

[0066] Acidifier: 1.5 kg

[0067] Covering material: 7.5 kg

[0068] Coated reducing agent: 4 kg

[0069] 2. Process steps and parameters

[0070] (1) Surface activation: After crushing 13.5 kg of dried bamboo chips, put them into 6.5 kg of surfactant, stir at 85°C for 1 h, remove the moisture by suction filtration, and obtain surface-activated bamboo chips after drying.

[0071] (2) Preparation: The surface-activated bamboo chips prepared in step (1), 16 kg α-Al 2 o 3 , 10 kg of pore-forming agent, 13 kg of clay, 13 kg of bentonite and 15 kg of water were mixed in proportion and formed into balls to obtain ceramsite with a particle size of 6 mm. After drying, carbonize at 400°C for 0.5 h, activate at 600°C for 2 h, cool to 60°C, immerse in 1.5 kg of ac...

Embodiment 3

[0078] 1. Raw materials and dosage

[0079] Bamboo chips: 13.5 kg

[0080] Surfactant: 6.5 kg

[0081] Porogen: 10.5 kg

[0082] Clay: 12.5kg

[0083] Bentonite: 12kg

[0084] α-Al 2 o 3 : 15kg

[0085] Water: 17kg

[0086] Acidifier: 1.5 kg

[0087] Wrapping material: 6.5 kg

[0088] Coated reducing agent: 5 kg

[0089] 2. Process steps and parameters

[0090] (1) Surface activation: 13.5 kg of dried bamboo chips were crushed, put into 6.5 kg of surfactant, stirred at a constant temperature of 90 °C for 1.5 h, filtered to remove water, and surface-activated bamboo chips were obtained after drying.

[0091] (2) Preparation: The surface-activated bamboo chips prepared in step (1), 15 kg α-Al 2 o 3 , 10.5 kg of pore-forming agent, 12.5 kg of clay, 12 kg of bentonite and 17 kg of water were mixed in proportion and formed into balls to obtain ceramsite with a particle size of 6 mm. After drying, carbonize at 400°C for 1 h, activate at 600°C for 1.5 h, cool to 90°C, i...

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Abstract

The invention provides bamboo-charcoal-shaped porous ceramsite coated by zero-valent iron as well as a preparation method and application of the bamboo-charcoal-shaped porous ceramsite. The preparation method of the bamboo-charcoal-shaped porous ceramsite coated by zero-valent iron comprises the following steps: taking alpha-Al2O3 powder as ceramsite primary aggregate, clay and bentonite as auxiliary aggregates and surface-activated bamboo bits as bamboo charcoal preparation materials to combine with a pore forming agent to prepare pores without adding a sintering aid or a binder; adopting graded sintering at 400-600 DEG C to obtain bamboo-charcoal-shaped porous ceramsite by once molding; then, preparing the product bamboo-charcoal-shaped porous ceramsite coated by zero-valent iron by virtue of a reducing coating process of the coating material, wherein the product bamboo-charcoal-shaped porous ceramsite is a deep dark small ball with a grain size of 2-10 mm, internally a porous honeycomb spherical structure with a surface pore size of 15-25 mu m, has water absorption of 20-35% and a specific surface area of 40-60m<2>/g. The preparation method disclosed by the invention is environmentally friendly simple and energy-saving in preparation process, various in treated pollutants, and suitable for treating non-biodegradable wastewater such as flue gas wastewater, heavy metal wastewater, phenol-containing wastewater, emulsified oil wastewater, note printing and printing and dyeing wastewater, and raw material are easily available.

Description

technical field [0001] The invention belongs to the field of fine chemical industry and environment-friendly materials, and in particular relates to a coated bamboo charcoal porous ceramsite used for waste gas and waste water treatment and its preparation method and application. Background technique [0002] Bamboo powder is not only a commonly used filling additive, but also a raw material for many products. It is applicable to a wide range of industries and can be used as a raw material for various products such as bamboo and plastic products, leather, clothing, papermaking, outdoor decoration materials, and building materials. Every bamboo product will produce a lot of bamboo chips and bamboo powder after being shaped, polished and other processes. The content of cellulose and hemicellulose in the dry matter content of bamboo chips was higher than that of miscellaneous wood chips, and the content of lignin was also higher than that of miscellaneous wood chips. The regene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B38/08C04B38/02C04B35/64
CPCC04B38/009C04B41/009C04B41/5144C04B2235/349C04B2235/422C04B35/10C04B38/0051C04B38/08C04B38/02
Inventor 刘明华林晓杰陈怡悦刘以凡
Owner FUZHOU UNIV
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