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A microwave co-processing waste residue to prepare high-efficiency sintering flue gas adsorbent and method

A technology for co-processing and sintering flue gas, applied in separation methods, gas treatment, chemical instruments and methods, etc., can solve problems such as soil and water resource hazards, waste of resources, and increased maintenance costs of enterprises, and achieve shortened hydration time, Reduce the cost of raw materials and improve the effect of physical adsorption foundation

Active Publication Date: 2022-05-10
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the continuous improvement of the level of industrialization in our country, a large amount of industrial waste, especially industrial waste residue, is piled up as solid waste on a large scale, which not only causes waste of resources, but also causes great harm to soil and water resources, and also It will increase the maintenance cost of the enterprise itself

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  • A microwave co-processing waste residue to prepare high-efficiency sintering flue gas adsorbent and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing a high-efficiency sintered flue gas adsorbent by microwave co-processing waste residue of the present invention, the process flow is: crushing-batching-microwave hydration and modification treatment-mixing-briquetting, specifically including the following steps:

[0029] Dry the fly ash produced by burning coal in the selected boiler, the calcium carbide slag produced by hydrolyzing calcium carbide to produce acetylene, and the refining waste produced after molten steel refining to constant weight, then add it to a planetary ball mill for crushing, grinding and screening Particles below 0.074mm are produced; the main chemical components of each raw material are shown in Table 1, Table 2 and Table 3.

[0030] Table 1 The main chemical components of fly ash

[0031] chemical composition SiO 2

al 2 o 3

CaO MgO Loss on ignition other content / % 55.78 15.15 4.87 5.75 15.11 3.34

[0032] Table 2 Main chemic...

Embodiment 2

[0041]This example further illustrates the influence of different adsorbent block sizes on the adsorption effect. The specific operation steps are as follows:

[0042] Dry the fly ash produced by burning coal in the selected boiler, the calcium carbide slag produced by hydrolyzing calcium carbide to produce acetylene, and the refining waste produced after molten steel refining to constant weight, then add it to a planetary ball mill for crushing, grinding and screening Particles below 0.074mm are produced; the main chemical components of each raw material are shown in Table 1, Table 2 and Table 3.

[0043] Prepare qualified fly ash, carbide slag and water at a mass ratio of 1:0.8:2.5 to make a mixed slurry, and then place the mixed slurry in a microwave generator for hydration treatment at an output power of 500W for 50 minutes .

[0044] Weigh the refined waste slag powder with 50% of the total mass of the adsorbent, place it in a microwave generator and modify it with a mi...

Embodiment 3

[0048] This example further illustrates the influence of different adsorbent block sizes on the adsorption effect. The specific operation steps are as follows:

[0049] Dry the fly ash produced by burning coal in the selected boiler, the calcium carbide slag produced by hydrolyzing calcium carbide to produce acetylene, and the refining waste produced after molten steel refining to constant weight, then add it to a planetary ball mill for crushing, grinding and screening Particles below 0.074mm are produced; the main chemical components of each raw material are shown in Table 1, Table 2 and Table 3.

[0050] Prepare qualified fly ash, carbide slag and water at a mass ratio of 1:1.2:3 to make a mixed slurry, and then place the mixed slurry in a microwave generator for hydration treatment at an output power of 700W for 30 minutes .

[0051] Weigh the refined waste slag powder with 50% of the total mass of the adsorbent, place it in a microwave generator and modify it with a mic...

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Abstract

The invention provides a high-efficiency sintering flue gas adsorbent and a method for preparing waste residues through microwave co-processing. The adsorbent is prepared from the following raw materials according to the weight ratio of the mixed slurry of fly ash, carbide slag and water to the refining waste residue of 1:0.8-1.2. The method is as follows: using the action of microwave field to modify industrial solid waste fly ash, carbide slag and refining waste slag and prepare a high-efficiency adsorbent for sintering flue gas. The method uses a wide range of sources of raw materials, the preparation method of the adsorbent is simple, and the preparation process consumes relatively little energy. Compared with the traditional process, the preparation time of the adsorbent is greatly shortened and the cost of the preparation of the adsorbent is reduced. The purpose of efficient and rapid desulfurization and denitrification at the same time under low temperature gas conditions, the average desulfurization rate can reach 98.8%, the average denitrification rate can reach 91.9%, and reduce the environmental hazards of industrial solid waste and sintering flue gas.

Description

technical field [0001] The invention belongs to the field of adsorbent preparation, and in particular relates to a method for preparing a high-efficiency sintered flue gas adsorbent by cooperating with microwave treatment of waste residue. Background technique [0002] The problem of air pollution in our country is serious. Taking the flue gas emission problem of factories as an example, the main pollutant SO in the sintering flue gas emitted by iron and steel enterprises 2 and NO x It is one of the sources of pollution gases that are harmful to human, animal and plant health. A large amount of SO 2 and NO x It will directly cause air pollution problems such as acid rain, photochemical smog and smog. Therefore, reasonable control and treatment of the emission of harmful gases in flue gas is not only a practical problem that enterprises need to solve urgently, but also an important development direction for protecting the ecological environment. [0003] At present, the ...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/30B01D53/02
CPCB01J20/103B01J20/08B01J20/06B01J20/041B01D53/02B01J2220/42B01J2220/4875B01J2220/4887B01D2257/302B01D2257/404B01D2253/106B01D2253/104B01D2253/1124
Inventor 张军红胡国健郭庆何志军湛文龙
Owner UNIV OF SCI & TECH LIAONING
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