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Magnesium oxide based desulfurizing agent and preparation method thereof

A magnesium oxide-based, desulfurizing agent technology, applied in chemical instruments and methods, separation methods, ceramic products, etc., can solve the problems of large pollution emissions, high cost of magnesium oxide desulfurizing agents, and low desulfurization efficiency of calcium-based desulfurizing agents. Achieve excellent performance, realize comprehensive and efficient utilization of resources, and achieve good economic benefits

Active Publication Date: 2020-04-10
LIAONING DONGHE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of magnesia-based desulfurizer, which uses low-grade magnesite with low magnesia content as raw material, and the high-activity light-burned magnesium powder obtained by sintering the raw material through suspension kiln and The pore-forming agent is mixed, and the obtained magnesium oxide-based desulfurizer has a good desulfurization effect, thereby solving the problems of high cost of magnesium oxide desulfurizer, large amount of pollution discharge and low desulfurization efficiency of the existing calcium-based desulfurizer in the prior art

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  • Magnesium oxide based desulfurizing agent and preparation method thereof
  • Magnesium oxide based desulfurizing agent and preparation method thereof
  • Magnesium oxide based desulfurizing agent and preparation method thereof

Examples

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Embodiment 1

[0031] This embodiment provides a magnesium oxide-based desulfurizer, and the preparation method of the magnesium oxide-based desulfurizer includes the following steps:

[0032] (1) Take magnesite tailings with a magnesium oxide content of ≤43.0%, crush them with a jaw crusher, and feed them into a ball mill for ball milling. Add medicament for desilication and decalcification to obtain a tailing slurry with a fineness of 120 mesh. ;

[0033] (2) Feed the tailings slurry through a raw material feeder into a flash dryer for drying, and then feed the dried powder into a suspension kiln. After calcination at 1100°C for 50 minutes, a fineness of 200 meshes, 95% pass rate, and active ≥75% active light-burned magnesia powder (the citric acid method activity determination time is 18 seconds) (where, such as figure 2 As shown, the fineness distribution of the obtained activated light-burned magnesia powder is uniform);

[0034] (3) Add 500 parts by weight of the active light-burned magnes...

Embodiment 2

[0036] This embodiment provides a magnesium oxide-based desulfurizer, and the preparation method of the magnesium oxide-based desulfurizer includes the following steps:

[0037] (1) Take magnesite tailings with a magnesium oxide content of ≤43.0%, crush them with a jaw crusher, and feed them into a ball mill for ball milling. Add medicament for desilication and decalcification to obtain a tailing slurry with a fineness of 120 mesh. ;

[0038] (2) Feed the tailings slurry through a raw material feeder into a flash dryer for drying, and then feed the dried powder into a suspension kiln. After calcination at 850°C for 30 minutes, a fineness of 200 meshes, 95% pass rate, and active ≥75% active light burned magnesium oxide powder;

[0039] (3) Add 500 parts by weight of the active light-burned magnesia powder obtained in step (2), 20 parts by weight of pore-forming agent talc, and 480 parts by weight of water, and mix uniformly to prepare a magnesium oxide-based desulfurizer. The averag...

Embodiment 3

[0041] This embodiment provides a magnesium oxide-based desulfurizer, and the preparation method of the magnesium oxide-based desulfurizer includes the following steps:

[0042] (1) Take magnesite tailings with a magnesium oxide content of ≤43.0%, crush them with a jaw crusher, and feed them into a ball mill for ball milling. Add medicament for desilication and decalcification to obtain a tailing slurry with a fineness of 120 mesh. ;

[0043] (2) Feed the tailings slurry through a raw material feeder into a flash dryer for drying, and then feed the dried powder into a suspension kiln, and pass it through suspension calcination at 1100°C for 50 minutes to obtain a fineness of 200 mesh with a pass rate of 95% and an activity ≥75% active light burned magnesium oxide powder;

[0044] (3) Add 500 parts by weight of the active light-burned magnesia powder obtained in step (2), 50 parts by weight of pore-forming agent talc powder, and 520 parts by weight of water, and mix uniformly to prep...

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Abstract

The invention provides a magnesium oxide based desulfurizing agent and a preparation method thereof. The magnesium oxide based desulfurizing agent is prepared from caustic-burned magnesia powder, a pore forming agent, and water; wherein the active caustic-burned magnesia powder has a magnesia content of 75% or more and is prepared by sintering low-grade magnesite with a magnesium content of 43.0%or less in a suspension kiln. The low-grade magnesite with a low magnesia content is taken as the raw material and then sintered in a suspension kiln to prepare the active caustic-burned magnesia powder; then the caustic-burned magnesia powder is mixed with the pore forming agent and water to obtain the magnesium oxide based desulfurizing agent, which has a good desulfurizing effect; and solved are the problems that in the prior art, the cost of a magnesia desulfurizing agent is high, the pollutant discharge amount is large, and the desulfurizing efficiency of a conventional calcium based desulfurizing agent is low.

Description

Technical field [0001] The invention relates to the technical field of waste treatment environment, and more specifically, to a magnesium oxide-based desulfurizer and a preparation method thereof. Background technique [0002] There are probably more than 90% of SO in our country 2 Emissions come from the combustion of coal fuel, which causes great harm to the environment. Currently controlling SO 2 The main means of emission is to desulfurize the flue gas through a desulfurizer. Among them, the most commonly used process is "calcium desulfurization", which uses lime for wet desulfurization, but its desulfurization products have no better treatment methods. On the other hand, my country’s magnesite industry has adopted more extensive production methods in recent years. Reverberatory kilns are currently the main light-fired magnesite kilns in Liaoning, China, accounting for more than 99% of the number of light-fired kilns. The equipment is very backward. At the same time, the ut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B2/10C04B38/00C04B28/10B01D53/50B01D53/81C04B111/40
CPCC04B2/102C04B38/00C04B28/10B01D53/81B01D53/50C04B2111/40C04B22/08
Inventor 毕万利毕胜民赵九野吴山王梓涵关岩孙美硕
Owner LIAONING DONGHE NEW MATERIAL CO LTD
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