Sintering treatment method for gagate dry method waste desulfurizer

A waste desulfurizer and dry desulfurization technology, which is applied in chemical instruments and methods, sulfur compounds, and process efficiency improvement, etc., can solve problems such as difficult treatment, hidden safety hazards of hazardous wastes, etc., and achieve the effect of high recovery efficiency.

Inactive Publication Date: 2018-10-19
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the problems that the dry process waste desulfurizer belongs to dangerous waste, which has potential safety hazards and is difficult to deal with, and provides a sintering treatment method for the dry process waste desulfurizer. Safe treatment of legal waste desulfurizers and recovery of sulfides contained in them, achieving the purpose of harmless treatment of hazardous wastes and recycling of sulfur, iron and other elements

Method used

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  • Sintering treatment method for gagate dry method waste desulfurizer
  • Sintering treatment method for gagate dry method waste desulfurizer
  • Sintering treatment method for gagate dry method waste desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1 The following steps are used to treat the waste desulfurizer produced by Baosteel Zhanjiang Iron and Steel Coking Coal Refined Dry Desulfurization Unit in the production of No. 1 and No. 2 sintering machines of Zhanjiang Iron and Steel:

[0036] (1) Treatment before taking out the waste desulfurization agent: before taking the waste desulfurization agent out of the tank of the dry desulfurization device, fill the dry desulfurization device with nitrogen for purging, replace the gas in the tower, and then take out the waste desulfurization agent;

[0037] (2) Pre-mixing and dilution stacking: transport the taken out waste desulfurizer to the stockyard, where the waste desulfurizer is pre-mixed with 2~3 times the mass of iron ore powder (Yangdi ore powder) and stacked after dilution Store in the stockyard to obtain the diluted waste desulfurizer mixed material; control the stockpile temperature below 50°C;

[0038] (3) Mixing and stacking of powder ore for sinte...

Embodiment 2

[0044] Embodiment 2 Adopt the following steps to realize the present invention:

[0045] (1) Treatment before taking out the waste desulfurization agent: before taking the waste desulfurization agent out of the tank of the dry desulfurization device, fill the dry desulfurization device with nitrogen for purging, replace the gas in the tower, and then take out the waste desulfurization agent;

[0046](2) Pre-mixing, dilution and stacking: transport the taken out waste desulfurizer to the stockyard, where the waste desulfurizer and iron ore powder (Yangdi ore powder) of twice the mass are pre-mixed, diluted, and stored in In the stockyard, the diluted waste desulfurizer mixed material is obtained; the temperature of the stockpile is controlled below 45°C;

[0047] (3) Mixing and stacking of powder ore for sintering: the diluted waste desulfurizer mixture in the stockyard is sent to the mixing silo through the reclaimer, and the cut-out amount is cut out from the mixing silo acco...

Embodiment 3

[0052] Embodiment 3 Adopt the following steps to realize the present invention:

[0053] (1) Treatment before taking out the waste desulfurization agent: before taking the waste desulfurization agent out of the tank of the dry desulfurization device, fill the dry desulfurization device with nitrogen for purging, replace the gas in the tower, and then take out the waste desulfurization agent;

[0054] (2) Pre-mixing, dilution and stacking: transport the taken out waste desulfurizer to the stockyard, where the waste desulfurizer and 3 times the mass of iron ore powder (Yangdi ore powder) are pre-mixed, diluted and stored in In the stockyard, the diluted waste desulfurization agent mixed material is obtained; the temperature of the stockpile is controlled below 50°C;

[0055] (3) Mixing and stacking of powder ore for sintering: the diluted waste desulfurizer mixture in the stockyard is sent to the mixing silo through the reclaimer, and the cut-out amount is cut out from the mixin...

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Abstract

The invention discloses a sintering treatment method for a gagate dry method waste desulfurizer. The gagate dry method waste desulfurizer is safely treated by a sintering process and a desulfurizationand denitration device, sulfides contained in the gagate dry method waste desulfurizer are recovered, and the purpose of harmless treatment of hazardous waste and recycling and reusing of sulfur andiron and other elements in the gagate dry method waste desulfurizer can be achieved. The sintering treatment method specifically includes (1) pre-treatment of the waste desulfurizer before taking out,(2) pre-mixing, dilution and stacking, (3) mixing with sintering powder-mineral and stacking, and (4) high-temperature sintering. The method has the characteristics such as comprehensive treatment ofpollutants, large processing capacity and high sulfur recovery efficiency.

Description

technical field [0001] The invention relates to a treatment method for waste desulfurizers in iron and steel plants, in particular to a sintering treatment method for waste desulfurizers in a coal refining dry process. Background technique [0002] With the increasingly higher requirements for environmental protection, the gas purification and desulfurization process of the coking unit of many iron and steel plants uses a dry desulfurization device on the basis of vacuum potassium carbonate or FRC desulfurization to further reduce the H in the coke oven gas. 2 S, clean gas H after dry desulfurization 2 S content≤100mg / Nm 3 . [0003] The active ingredient of the desulfurizer used in coal fine dry desulfurization is Fe 2 o 3 ·H 2 O, the main composition is shown in Table 1, containing 20% ​​CaO and 50% CaSO 4 , in which the initial S content is ≤11.76%, and the Ca content is ≤28.99%. [0004] Element Fe 2 o 3 CaSO 4 CaO other oxides ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C01B17/52C01B17/54C01B17/74
CPCC01B17/52C01B17/54C01B17/74C22B1/16Y02P10/20
Inventor 梁利生周琦蒋林海苏威
Owner BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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