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Desulfurization ash treatment method

A treatment method and desulfurization ash technology, which are applied in the field of desulfurization ash treatment, can solve the problems of polluting the environment, difficult to treat and recycle desulfurization ash, and occupying land for desulfurization ash, so as to reduce energy consumption, improve quality indicators and improve the metallurgical performance of sintered ore. , the effect of improving the fluidity of the liquid phase

Active Publication Date: 2019-11-22
马鞍山赤源冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that sinter flue gas desulfurization ash is difficult to process and recycle in the prior art, and provides a desulfurization ash treatment method. powder and heat up to 812-887°C for the second stage of heat preservation treatment to obtain the desulfurization ash treatment product, that is, CaO flux, and then realize the recycling of desulfurization ash, and solve the problem of desulfurization ash occupying land and polluting the environment

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Embodiment 1

[0044] Such as figure 1 Shown, the concrete steps of a kind of desulfurization ash processing method of the present invention are as follows:

[0045] S10. Weigh 500 g of raw material desulfurization ash after vacuum drying at 105° C. for 4 hours to obtain dry desulfurization ash. Take dry desulfurization ash with a mass of m=100 g, and detect CaSO in the dry desulfurization ash 4 The mass fraction of Fe is w1=2.50%, Fe 2 o 3 The mass fraction of w2=1.21%;

[0046] S20, calculate CaSO in dry desulfurization ash 4 and Fe 2 o 3 The mass of each is m CaSO4 = 2.50g and m Fe2O3 = 1.21g, dry desulfurization ash is added in the reaction vessel, pass into the reaction vessel the oxygen in the protective gas discharge vessel, and described protective gas is inert gas or N 2 Gas, the shielding gas in this embodiment is N 2 Gas, the gas flow rate is Q1=0.5L / min;

[0047] S30. Under the condition of protective gas, heat the dry desulfurized ash to T1 temperature, the heating rat...

Embodiment 2

[0075] The basic content of this embodiment is the same as that of Embodiment 1, except that the specific steps of a desulfurization ash treatment method of this embodiment are as follows:

[0076]S10. Weigh 500 g of raw material desulfurization ash after vacuum drying at 105° C. for 4 hours to obtain dry desulfurization ash. Take dry desulfurization ash with a mass of m=100 g, and detect CaSO in the dry desulfurization ash 4 The mass fraction of Fe is w1=2.50%, Fe 2 o 3 The mass fraction of w2=1.21%;

[0077] S20, calculate CaSO in dry desulfurization ash 4 and Fe 2 o 3 The mass of each is m CaSO4 = 2.50g and m Fe2O3 = 1.21g, dry desulfurization ash is added in the reaction vessel, pass into the reaction vessel the oxygen in the protective gas discharge vessel, and described protective gas is inert gas or N 2 Gas, the shielding gas in this embodiment is N 2 Gas, the gas flow rate is Q1=0.5L / min;

[0078] S30. Under the condition of protective gas, heat the dry desulf...

Embodiment 3

[0083] The basic content of this embodiment is the same as that of Embodiment 1, except that the specific steps of a desulfurization ash treatment method of this embodiment are as follows:

[0084] S10. Weigh 500 g of raw material desulfurization ash after vacuum drying at 105° C. for 4 hours to obtain dry desulfurization ash. Take dry desulfurization ash with a mass of m=100 g, and detect CaSO in the dry desulfurization ash 4 The mass fraction of Fe is w1=2.50%, Fe 2 o 3 The mass fraction of w2=1.21%;

[0085] S20, calculate CaSO in dry desulfurization ash 4 and Fe 2 o 3 The mass of each is m CaSO4 = 2.50g and m Fe2O3 = 1.21g, dry desulfurization ash is added in the reaction vessel, pass into the reaction vessel the oxygen in the protective gas discharge vessel, and described protective gas is inert gas or N 2 Gas, the shielding gas in this embodiment is N 2 Gas, the gas flow rate is Q1=0.5L / min;

[0086] S30. Under the condition of protective gas, heat the dry desul...

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Abstract

The invention discloses a desulfurization ash treatment method, and belongs to the technical field of iron ore sintering. According to the desulfurization ash treatment method, dried desulfurized ashis insulated for a first stage at T1=747-812 DEG C, and then carbon powder is added and heated to T2=812-887 DEG C for a second stage so as to obtain a desulfurized ash treatment substance. The desulfurized ash treatment substance can replace a CaO flux for iron ore sintering to return to iron ore sintering, thus realizing the effective treatment and recycling of the desulfurized ash, and the problems of land occupation and environmental pollution caused by the desulfurized ash are solved.

Description

technical field [0001] The invention relates to the technical field of iron ore sintering, in particular to a desulfurization ash treatment method. Background technique [0002] In my country, SO emissions from iron and steel enterprises 2 50%-70% of them come from the sintering process. In the prior art, semi-dry desulfurization technology is usually used for sintering flue gas desulfurization. This method has low investment and high desulfurization rate, but a large amount of desulfurization will be generated during the semi-dry desulfurization process. Ash, at present, the desulfurization ash is mainly disposed of. Since the desulfurization ash contains a large amount of unstable CaSO 3 , will cause resource waste, environmental pollution and land occupation, therefore, how to deal with desulfurization ash has become a current research hotspot. [0003] In addition, with the increasing requirements for solid waste treatment in our country, how to better comprehensively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/16C22B1/10
CPCC22B1/10C22B1/16
Inventor 李娜
Owner 马鞍山赤源冶金科技有限公司
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