Method for preparing zeolitic particulate material from washed coal gangue

A granular material and coal gangue technology, which is applied in the field of solid waste resource utilization and water treatment materials, can solve the problems of urban landscape environment, atmospheric environment and ecological environment, restricting the industrial application of technical methods, and long-term accumulation of coal gangue. , to achieve cost reduction, high speed, and solve the effect of wear and tear

Active Publication Date: 2019-01-15
中科华鹿(合肥)环保科技有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, the resource utilization rate of coal gangue in my country is still less than 40%, which leads to the long-term accumulation of coal gangue in coal mines and cities, and has a serious impact on the urban landscape environment, atmospheric environment and ecological environment.
[0006] However, the above-mentioned existing methods for resource utilization of washed coal gangue to prepare environmentally friendly materials all have the problems of complex preparation process, high production cost, and secondary pollution, which restricts the industrial application of technical methods

Method used

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  • Method for preparing zeolitic particulate material from washed coal gangue
  • Method for preparing zeolitic particulate material from washed coal gangue
  • Method for preparing zeolitic particulate material from washed coal gangue

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) After the washed coal gangue is crushed by a roller crusher and passed through a 10mm sieve (the photo is shown in figure 1 As shown in (a), calcined in a muffle furnace at 650 ° C for 1 h to basically oxidize the organic matter and transform kaolinite into metakaolinite.

[0030] (2) The calcined ash is selectively crushed and sieved to obtain porous particles with a particle size of 3 to 5 mm (the photo is as follows: figure 1 As shown in (b), the SEM image is as figure 2 shown).

[0031] (3) Prepare a sodium hydroxide solution with a mass concentration of 15%, weigh the particles according to the mass volume ratio of the particles to the sodium hydroxide solution 1g:2mL, and put them into a reaction vessel.

[0032] (4) Put the reaction vessel into a water bath and raise the temperature to 90°C, keep it warm for 24 hours. During the reaction, use a pump to pump the solution from the bottom of the reactor to the top of the reactor, so that the solution in the r...

Embodiment 2

[0036] (1) After crushing 10kg of washed coal gangue with a roller crusher and passing through a 10mm sieve, it was calcined in a muffle furnace at 800°C for 1 hour to basically oxidize and decompose the organic matter and transform kaolinite into metakaolinite.

[0037] (2) The calcined ash is processed in a drum type jar mill for 1 hour to be selectively crushed, and sieved to obtain particles with a particle size greater than 2 mm;

[0038] (4) preparation mass concentration is the sodium hydroxide solution of 10%, according to the ratio batching of particle and sodium hydroxide solution mass volume ratio 1g:3mL, puts into reaction container and seals;

[0039] (5) Put the reaction vessel into the oven, set the temperature at 95°C, and keep it warm for 12 hours. During the reaction, pump the solution from the bottom of the reactor and transport it to the top of the reactor, so that the solution in the reactor flows through the particles in a seepage manner. Material, to ach...

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Abstract

The invention discloses a method for preparing a zeolitic particulate material from washed coal gangue. The method comprises the following steps: crushing and sieving the ash residue obtained after the washed coal gangue is calcinated at a temperature of 650 to 900 DEG C, and adding the obtained particulate matter to a sodium hydroxide solution, so that an active silicon aluminum component in theparticulate matter is reacted with sodium hydroxide to crystallize and grow zeolite 4A on the surface of the particulate matter, namely, the zeolitic particulate material. The zeolitic granular material prepared from the washed coal gangue disclosed by the invention has the advantages of wide source of raw materials, comprehensive utilization of waste, and low preparation cost, the synthetic zeolite is mainly distributed on the surface of the particulate matter, the speed of adsorbing a pollutant is fast, and the zeolitic particulate material can be widely applied to a percolation material forpolluted rainwater treatment in the construction of the sponge city, and a percolation material for the constructed wetland.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource utilization and water treatment materials, and specifically relates to a method for resource utilization of coal gangue to obtain water pollution control materials. Background technique [0002] Coal gangue is an industrial solid waste with a large amount and a wide range, accounting for more than 20% of the total industrial solid waste in the country. In the process of coal development, an average of about 150kg of coal gangue is produced per ton of coal. At present, the resource utilization rate of coal gangue in my country is still less than 40%, which leads to the long-term accumulation of coal gangue in coal mines and cities, which has a serious impact on the urban landscape environment, atmospheric environment and ecological environment. [0003] The current method to reduce coal gangue emissions is to backfill the stope, and the way to dispose of coal mines on the spot is to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B39/18
CPCC01B39/18C01P2004/03
Inventor 魏星陈赫然陈天虎
Owner 中科华鹿(合肥)环保科技有限公司
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