Coal gangue-based porous composite material as well as preparation method and application thereof

A technology of porous composite materials and coal gangue, applied in the field of materials, can solve the problems of inability to adsorb heavy metals, etc., achieve excellent adsorption capacity, strong chelation performance, and reduce the effect of impact

Pending Publication Date: 2021-02-05
中科院过程工程研究所南京绿色制造产业创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the multi-source coal-based solid waste soil water retention conditioner cannot absorb heavy metals in the soil.

Method used

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  • Coal gangue-based porous composite material as well as preparation method and application thereof
  • Coal gangue-based porous composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] This embodiment provides a coal gangue-based porous composite material, the preparation method of which is as follows:

[0089] (1) Take coal gangue, after preliminary mechanical crushing and further 6h of 350rpm ball milling, to obtain coal gangue fine powder with an average particle size of 1.6μm (D90 is 2.4μm); after heat treatment at 600°C for 4h, take it out at 25°C Leave to cool.

[0090] (2) the coal gangue fine powder that step (1) obtains and the massfraction that accounts for slurry quality are 0.03% sodium dodecylbenzene sulfonate, 0.8% polyurethane, 0.5% hydrophilic modified nano-carbon, 3% aluminum sol was ball milled with an appropriate amount of water, and the slurry was taken out after 1 hour, further stirred by high-speed mechanical stirring at 1100 rpm for 15 minutes to foam, then injected into a mold, and dried at 40°C for 10 hours.

[0091] After demoulding, the green body was heated up to 1100°C under an air atmosphere program and held for 2 hours ...

Embodiment 2

[0095] This embodiment provides a coal gangue-based porous composite material, the preparation method of which is as follows:

[0096] (1) Take coal gangue, after preliminary mechanical crushing and further 8h of 300rpm ball milling, to obtain coal gangue fine powder with an average particle size of 0.1μm (D90 is 2.4μm); after heat treatment at 500°C for 10h, take it out at 25°C Leave to cool.

[0097] (2) the coal gangue fine powder that step (1) obtains and the mass fraction that accounts for slurry mass are 0.01% sodium lauryl sulfate, 2% polyurethane, 0.1% hydrophilic modified nano-carbon, 6% The aluminum sol was ball-milled with an appropriate amount of water, and the slurry was taken out after 1 hour, further stirred by high-speed mechanical stirring at 600 rpm for 30 minutes to foam, then injected into a mold, and dried at 15°C for 30 hours.

[0098] After demoulding, the green body was heated up to 500°C under an air atmosphere program and kept for 4 hours to obtain a...

Embodiment 3

[0102] This embodiment provides a coal gangue-based porous composite material, the preparation method of which is as follows:

[0103] (1) Take coal gangue, after preliminary mechanical crushing and further 4h of 400rpm ball milling, to obtain coal gangue fine powder with an average particle size of 10μm (D90 is 2.4μm); after heat treatment at 700°C for 2h, take it out at 25°C cool down.

[0104] (2) the coal gangue fine powder that step (1) obtains and the mass fraction that accounts for slurry mass are 0.05% sodium cetyl sulfate, 0.04% polyurethane, 0.8% hydrophilic modified nano-carbon, 1% The aluminum sol was ball-milled with an appropriate amount of water, and the slurry was taken out after 1 hour, further stirred by high-speed mechanical stirring at 400 rpm for 5 minutes to foam, then injected into a mold, and dried at 60°C for 4 hours.

[0105] After demoulding, the green body was heated up to 1400°C in an air atmosphere and kept for 1 hour to obtain a gangue-based por...

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Abstract

The invention provides a coal gangue-based porous composite material as well as a preparation method and application thereof. The porous composite material comprises a coal gangue-based porous skeleton, an active carrier and an active component, the active carrier is distributed on the surface of the pore wall of the coal gangue-based porous skeleton; and the active component is loaded in the active carrier. The preparation method comprises the following steps: (1) crushing coal gangue to obtain coal gangue fine powder, carrying out heat treatment, and foaming to obtain the coal gangue-based porous skeleton; and (2) modifying the pore wall surface of the coal gangue-based porous skeleton obtained in the step (1) by using the active carrier and the active component to obtain the coal gangue-based porous composite material. The coal gangue-based porous composite material provided by the invention is low in development cost and simple in process, has excellent solid particle removal capacity and heavy metal ion adsorption capacity for sewage and wastewater, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a gangue-based porous composite material and its preparation method and application, in particular to a low-cost coal gangue-based porous composite material and its preparation method and application. Background technique [0002] Coal gangue is the waste discharged during coal mining and processing. It is one of the largest solid wastes in my country at present, accounting for more than 20% of the national industrial solid waste. The annual output of coal gangue accounts for 10-15% of the annual output of coal, and the existing total amount is about 4.5 billion tons. With the rapid development of my country's industry, its output is still increasing. The environmental pollution caused by the accumulation of a large amount of coal gangue and solid waste is also very serious. The dust generated by wind erosion will cause air pollution. out of balance. [0003] With the devel...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/20B01J20/103B01J20/08B01J20/06B01J20/041B01J20/262B01J20/22B01J20/0248B01J20/0288B01J20/0296C02F1/281C02F1/283C02F1/285B01J2220/4812B01J2220/4806B01J2220/4887B01J2220/46C02F2101/20
Inventor 刘开琪孙广超闫明伟张佳钰熊瑞陈运法
Owner 中科院过程工程研究所南京绿色制造产业创新研究院
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