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Method and equipment for recycling iron-oxide from powder dust of sintering device handpiece

A sintering machine and iron oxide technology, which is applied to chemical instruments and methods, separation methods, lighting and heating equipment, etc., can solve problems such as blocking the spray facilities of desulfurization devices, threatening the normal sintering production, and stopping production and maintenance of sintering machines. The effect of reducing dust concentration, eliminating negative effects, and extending maintenance intervals

Inactive Publication Date: 2009-01-21
JINAN HIGH TECH DEV ZONE ZHONGTAI ENVIRONMENTAL PROTECTION TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, although the dust produced in the production process of the sintering machine is relatively complex, 40% to 65% of it is iron oxide. Since no effective measures are taken to recycle it during the desulfurization process, it can only be used as industrial waste in vain. wasted
On the other hand, due to the failure to take effective measures to separate and recycle dust such as iron oxide, many difficult-to-separate substances are produced during the desulfurization and dust removal process, which often block the spraying facilities of the desulfurization device, thereby causing the sintering machine to be shut down for maintenance. This dust removal has a great negative impact on the production of the sintering machine
It often reduces the quality of sinter ore, increases the energy consumption of the process, and some even threatens the normal progress of sinter production

Method used

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  • Method and equipment for recycling iron-oxide from powder dust of sintering device handpiece
  • Method and equipment for recycling iron-oxide from powder dust of sintering device handpiece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Sintering machine 26m 2 , air volume 120,000 m 3 / h, the flue gas temperature at the head of the sintering machine is 120°C, the water content is 10.7%, and the dust concentration is 952mg / m 3 , wind pressure 721Pa.

[0020] The course of work of the present invention's recovery iron oxide method is:

[0021] (1) After preliminary dust removal, the waste gas dust from the head of the sintering machine is sent by the induced draft fan 1 through the flue 2 to the iron oxide recovery device 4 installed in front of the desulfurization tower 6 for processing. Since the cross-section in the cavity 11 of the iron oxide separation device 4 is larger than that of the flue 2, the flue gas mainly containing iron oxide dust and sulfur dioxide enters the cavity 11 and the flow rate slows down, and some large particles of iron oxide The dust automatically settles at the bottom of the iron oxide separator chamber 11.

[0022] (2) Iron oxide recovery device 4 uses water as separati...

Embodiment 2

[0029] Sintering machine 72m 2 , air volume 400,000 m 3 / h, the flue gas temperature at the head of the sintering machine is 120°C, the water content is 9.7%, and the dust concentration is 785mg / m 3 , wind pressure 753Pa.

[0030] The course of work of the present invention's recovery iron oxide method is:

[0031] (1) After preliminary dust removal, the waste gas dust from the head of the sintering machine is sent by the induced draft fan 1 through the flue 2 to the iron oxide recovery device 4 installed in front of the desulfurization tower 6 for processing. Since the cross-section in the cavity 11 of the iron oxide separation device 4 is larger than that of the flue 2, the flue gas mainly containing iron oxide dust and sulfur dioxide enters the cavity 11 and the flow rate slows down, and some large particles of iron oxide The dust automatically settles at the bottom of the iron oxide separator chamber 11.

[0032] (2) iron oxide recovery device 4 uses water as separatin...

Embodiment 3

[0039] Sintering machine 24m 2 , air volume 100,000 m 3 / h, the flue gas temperature at the head of the sintering machine is 120°C, the water content is 10.4%, and the dust concentration is 808mg / m 3 , wind pressure 640Pa.

[0040] The course of work of the present invention's recovery iron oxide method is:

[0041] (1) After preliminary dust removal, the waste gas dust from the head of the sintering machine is sent by the induced draft fan 1 through the flue 2 to the iron oxide recovery device 4 installed in front of the desulfurization tower 6 for processing. Since the cross-section in the cavity 11 of the iron oxide separation device 4 is larger than that of the flue 2, the flue gas mainly containing iron oxide dust and sulfur dioxide enters the cavity 11 and the flow rate slows down, and some large particles of iron oxide The dust automatically settles at the bottom of the iron oxide separator chamber 11.

[0042] (2) The iron oxide recovery device 4 uses water as a se...

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Abstract

The invention discloses a method for recycling ferric oxide from the dust at the head of a sintering machine; the waste gas dust at the head of the sintering machine is sent into a ferric oxide recovery device installed in front of a desulfurizing tower by an induced draft fan through a flue, a high-pressure pump and injection spray pipes are used for forming high-pressure water mist in a cavity, the ferric oxide dust is contacted with the high-pressure water mist and enters a circulation water basin through a water outlet for sedimentation, pressure filtration and recycling. The device adopting the method consists of a cavity, an air inlet, an air outlet, a water inlet and the water outlet and a high-pressure water pipe which is transversely arranged in the cavity; the high-pressure water pipe is provided with a plurality of rows of injection spray pipes which are evenly equipped with spray holes; the water inlet is connected with the high-pressure pump by a water feed pipe and is communicated with the circulation water basin; the water outlet at the bottom of the cavity is connected with the circulation water basin by a drain flume. The ferric oxide recovery rate of the method is as high as 84%-90%, the concentration of dust is reduced from 750-960mg / m<3> to 88-120mg / m<3>, and the comprehensive effect of dust removal and desulfurizing of the sintering machine is improved.

Description

Technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method and equipment for recovering iron oxide from sintering machine head dust. Background technique [0002] Sintering production is an important process in ironmaking. Through sintering, the metallurgical properties of iron ore can be improved and harmful impurities in raw materials can be removed. However, the amount of waste gas produced by sintering is large, the concentration of dust is high, and the pollution of the atmospheric environment is very serious. With the enhancement of environmental protection awareness, higher requirements are put forward for the treatment of a large amount of dust in sintering production. At present, in my country, there are generally two ways to purify the flue gas and dust generated during the sintering process of iron ore raw materials: one is to directly remove dust from the flue gas and dust generated by the head of t...

Claims

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Application Information

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IPC IPC(8): B01D47/06F27B21/08
Inventor 王京福王丽君王文君
Owner JINAN HIGH TECH DEV ZONE ZHONGTAI ENVIRONMENTAL PROTECTION TECH DEV CENT