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A kind of treatment method of waste desulfurization agent

A treatment method and technology of desulfurizer, applied in the field of metallurgy and material science, to achieve the effects of saving treatment costs, simple, mature and reliable process scheme, and increasing production

Active Publication Date: 2019-12-06
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the sintering method is used to treat waste desulfurizers, there must be supporting flue gas desulfurization and denitrification facilities to ensure that the flue gas discharges up to the standard

Method used

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  • A kind of treatment method of waste desulfurization agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A treatment method for waste desulfurizer, comprising the following steps:

[0057] (1) Crushing of waste desulfurizer: take waste desulfurizer, its main chemical composition is 9.10% TFe, 32.29% S, 25.90% CaO, 0.9% MgO, 1.0% SiO 2 ; LOI value was 35.66%. The original particle size of waste desulfurizer is 3-10mm, accounting for 95%, of which 8-10mm accounts for about 35%. Crushing the above waste desulfurizer until the particle size is less than 8mm accounts for 100%.

[0058] (2) Under the set target chemical composition of sinter, the batching calculation is carried out according to the chemical composition of the sintering raw materials used, and the batching ratio of various raw materials required is obtained. The specific steps are:

[0059] Controlling SiO in Sinter Chemical Composition 2 Content 5.0%, MgO content 1.5%, alkalinity R=1.78 under the target value, carry out batching calculation, obtain the mixing ratio of mixture as follows: iron ore homogeneous...

Embodiment 2

[0071] A treatment method for waste desulfurizer, comprising the following steps:

[0072] (1) Crushing of waste desulfurizer: take waste desulfurizer, its main chemical composition is 9.10% TFe, 32.29% S, 25.90% CaO, 0.9% MgO, 1.0% SiO 2 ; LOI value is 35.66%; the original particle size of waste desulfurizer is 3-10mm, accounting for 95%, of which 8-10mm accounts for about 35%. Crushing the above waste desulfurizer until the particle size is less than 8mm accounts for 100%.

[0073] (2) Under the set target chemical composition of sinter, the batching calculation is carried out according to the chemical composition of the sintering raw materials used, and the batching ratio of various raw materials required is obtained. The specific steps are:

[0074] Controlling SiO in Sinter Chemical Composition 2 Content of 5.0%, MgO content of 1.5%, basicity R = 1.78 under the target value of the batching calculation, the mixture ratio is as follows: 59.89% iron ore homogeneous powder...

Embodiment 3

[0085] A treatment method for waste desulfurizer, comprising the following steps:

[0086] (1) Crushing of waste desulfurizer: take waste desulfurizer, its main chemical composition is 9.10% TFe, 32.29% S, 25.90% CaO, 0.9% MgO, 1.0% SiO 2 ; LOI value is 35.66%; the original particle size of waste desulfurizer is 3-10mm, accounting for 95%, of which 8-10mm accounts for about 35%. Crushing the above waste desulfurizer until the particle size is less than 8mm accounts for 100%.

[0087] (2) Under the set target composition of sintering ore, the batching calculation is carried out according to the chemical composition of the sintering raw materials used, and the batching ratio of various raw materials required is obtained. The specific steps are:

[0088] Controlling SiO in Sinter Chemical Composition 2 Content of 5.0%, MgO content of 1.5%, basicity R = 1.78 under the target value of the batching calculation, the mixture ratio is as follows: 59.89% iron ore homogeneous powder 6...

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Abstract

The invention discloses a treatment method of a scrapped desulfurizing agent. The treatment method comprises following steps that the scrapped desulfurizing agent, iron ore powder, solid fuel, a fusing agent and returned mine are mixed, and a sintered mixture is obtained; water is added into the sintered mixture for mixing and granulating to obtain a granulating material; the granulating materialis sintered to obtain sintered ore and sintered flue gas; the sintered flue gas is subject to desulfurization and denitrification and then is exhausted to the atmosphere. The scrapped desulfurizing agent is added into the iron ore powder to be sintered, the desulfurization and denitrification of the sintered flue gas are reinforced, the sintered ore is produced for blast furnace ironmaking, the process scheme is simple, mature and reliable, iron, calcium, magnesium, sulfur and other valuable elements in the scrapped desulfurizing agent can be recycled, emissions of solid wastes can be reduced,a large amount of solid waste treatment cost is saved, production cost is effectively reduced, and the sustainable development aim is achieved.

Description

technical field [0001] The invention relates to the technical fields of metallurgy and material science, in particular to a method for treating waste desulfurizers. Background technique [0002] Desulfurizers are widely used in petroleum, chemical, metallurgy, electric power and other industries. Related industries such as the production of gas, natural gas and synthetic material gas must desulfurize various gases. Therefore, the demand for desulfurizers in the gas industry is increasing , At the same time, it also leads to a large increase in the waste desulfurization agent produced, which is gradually becoming a new source of solid pollution, which must be treated in a harmless manner. [0003] The main components of the waste desulfurizer are TFe, S and CaO, of which TFe accounts for 20-30%, S accounts for 30-35%, and CaO accounts for 30%. Its surface contains a large amount of tar, naphthalene, benzene, CnHm, NH 3 , HCN and other harmful organic compounds. In addition,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/24C22B1/18B01D53/00
CPCB01D53/00B01D2257/302B01D2257/40B01D2258/0283C22B1/18C22B1/2406Y02P10/20
Inventor 朱德庆潘建郭正启姚维杰李启厚杨聪聪石玥鲁胜虎严欣程李思维丑建磊
Owner CENT SOUTH UNIV
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