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A kind of desulfurization ash processing 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, the desulfurization ash is difficult to handle and recycle, and the desulfurization ash occupies land, etc., and achieves the effect of reducing energy consumption.

Active Publication Date: 2021-07-23
马鞍山赤源冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • A kind of desulfurization ash processing method
  • A kind of desulfurization ash processing method
  • A kind of desulfurization ash processing method

Examples

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Effect test

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, which belongs to the technical field of iron ore sintering. The present invention heats the dried desulfurized ash at T1=747-812°C for the first stage, then adds carbon powder and heats up to T2=812-887°C for the second stage of heat preservation, so as to obtain the desulfurized ash treatment. The desulfurization ash treatment can replace the CaO flux used for iron ore sintering and return to iron ore sintering, thereby realizing the effective treatment and recycling of desulfurization ash, and solving the problem of desulfurization ash occupying land and polluting the environment.

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 Patents(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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