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Method for preparing iron oxide red from waste desulfurizer

A waste desulfurizer, iron oxide red technology, applied in the direction of iron oxide, iron oxide/iron hydroxide, solid waste removal, etc., can solve the problems of high regeneration cost, unfriendly environment, environmental pollution, etc., and achieve a large specific surface area , good environmental significance and economic significance, and the effect of improving product purity

Active Publication Date: 2013-10-16
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] For this reason, the technical problem to be solved by the present invention lies in the problems of environmental pollution caused by waste desulfurizer discharge in the prior art, high regeneration cost, high production cost of iron oxide red and unfriendly environment, and provides a low production cost, Method for preparing iron oxide red from environment-friendly waste desulfurizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Taking a desulfurizer whose main components are active iron oxide and organic binder carboxymethyl cellulose (CMC) as an example, the sulfur content after use is 15% of the dry desulfurizer.

[0031] The steps of using the waste desulfurizer to prepare iron oxide red are as follows: (1) crush the used waste desulfurizer and use a 100-mesh sieve to separate and remove large particles, take 10 g of the crushed desulfurizer and place it in a closed quartz tube;

[0032] (2) Heating to 200 to 300°C under the condition of isolating air and flowing nitrogen, and controlling the time for 2 to 3 hours. In this environment, the different forms of sulfur contained in the waste desulfurizer will sublimate to a certain extent;

[0033] (3) Stop the nitrogen flow, change to air, control the temperature between 250 and 350 ° C, and control the time between 3 and 4 hours. The main component of the waste desulfurizer, FeS, will react with oxygen to form iron oxide red, while the waste d...

Embodiment 2

[0036] Taking a desulfurizer whose main components are active iron oxide and organic binder starch as an example, the sulfur content after use is 13% of the dry desulfurizer.

[0037] The steps of using the waste desulfurizer to prepare iron oxide red are as follows: (1) crush the used waste desulfurizer and use a 100-mesh sieve to separate and remove large particles, take 10 g of the crushed desulfurizer and place it in a closed quartz tube;

[0038] (2) Heating to 250 to 350°C under the condition of isolating air and flowing nitrogen, and controlling the time for 1.5 to 2.5 hours. Under this environment, the different forms of sulfur contained in the waste desulfurizer will sublimate to a certain extent;

[0039](3) Stop nitrogen flow, change to air flow, control the temperature between 350 and 500 ° C, and control the time between 2.5 and 3.5 hours. The main component of waste desulfurization agent, FeS, will react with oxygen to form iron oxide red, while waste desulfurizat...

Embodiment 3

[0042] Taking a desulfurizer whose main components are active iron oxide and organic binder starch as an example, the sulfur content after use is 13% of the dry desulfurizer.

[0043] The steps of using the waste desulfurizer to prepare iron oxide red are as follows: (1) crush the used waste desulfurizer and use a 100-mesh sieve to separate and remove large particles, take 10 g of the crushed desulfurizer and place it in a closed quartz tube;

[0044] (2) Heating to 300 to 400°C under the condition of isolating the air and flowing nitrogen, and controlling the time for 1 to 2 hours. In this environment, the different forms of sulfur contained in the waste desulfurizer will sublimate to a certain extent;

[0045] (3) Stop nitrogen, change to air, control the temperature between 500 and 600 ° C, and control the time between 2 and 3 hours. The main component of the waste desulfurizer, FeS, will react with oxygen to form iron oxide red, while the waste desulfurizer The remaining o...

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Abstract

The invention discloses a method for preparing iron oxide red from a waste desulfurizer, which comprises the following steps of: crushing and grinding the waste desulfurizer into particles; isolating the particles of the waste desulfurizer from air and heating the particles of the waste desulfurizer to a certain temperature; introducing the air into the particles of the waste desulfurizer, and heating the particles of the waste desulfurizer; and continuously introducing the air until the particles are cooled, and performing magnetic separation on obtained iron oxides. The method for preparing the iron oxide red from the waste desulfurizer solves the problems of environmental pollutions and high regeneration cost caused by the emission of the waste desulfurizer in the prior art, and ensures low production cost and environmental friendliness.

Description

technical field [0001] The invention relates to a method for preparing iron oxide red. Specifically, it is a method for preparing iron oxide red from waste desulfurizer. Background technique [0002] Iron oxide desulfurizer (Fe 2 o 3 Desulfurizer or Fe 2 o 3 ·H 2 O desulfurizer) has the advantages of good desulfurization activity, high sulfur capacity, and renewability, and is a good choice for removing H 2 S is a commonly used desulfurizer, and the iron oxide desulfurizer is prepared by adding an organic binder with iron oxide as the main raw material. [0003] The desulfurization mechanism of iron oxide desulfurizer is as follows: [0004] Fe 2 o 3 +3H 2 S → Fe 2 S 3 +3H 2 o [0005] Fe 2 o 3 +3H 2 S→2FeS+S+4H 2 o [0006] or Fe 2 o 3 ·H 2 O+3H 2 S → Fe 2 S 3 ·H2O+3H 2 O Fe 2 o 3 ·H2O+3H 2 S→2FeS+S+4H 2 O, [0007] The iron oxide desulfurizer is regenerative, and can be regenerated into iron oxide under aerobic conditions. The accepted re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/06B09B3/00
Inventor 赵文涛蒲延芳吴永涛闻学兵刘彦芳
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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