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Processing method of applying waste desulfurizing agents to sintering

A treatment method and desulfurization agent technology, applied in the fields of metallurgy and material science, can solve the problems of high sulfur content of waste desulfurizers, secondary pollution, smog disasters, etc., and achieve a mature and reliable process plan, reduce treatment costs, and reduce production costs. Effect

Active Publication Date: 2018-10-30
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the high sulfur content of waste desulfurizers is prone to spontaneous combustion during the stacking process, resulting in secondary pollution and smog disasters

Method used

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  • Processing method of applying waste desulfurizing agents to sintering

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Effect test

Embodiment 1

[0049] A treatment method for applying waste desulfurizer to sintering, comprising the following steps:

[0050] (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%. The above-mentioned waste desulfurizer is crushed with a double-roll crusher until the particle size is less than 8mm, accounting for 100% (of which less than 1mm accounts for 10%).

[0051] (2) Landfill stockpiling of waste desulfurizers: first mix the crushed waste desulfurizers with iron ore powder containing about 60% iron at a mass ratio of 1:10 to obtain a mixed powder containing waste desulfurizers. Then the mixed material is buried in the iron ore homogeneous ore powder stockpile containing about 60% iron at a mass ratio of 0.184:99.816, and the mixed ore powder contain...

Embodiment 2

[0065] A treatment method for applying waste desulfurizer to sintering, comprising the following steps:

[0066] (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%. The above-mentioned waste desulfurizer is crushed with a double-roll crusher until the particle size is less than 8mm, accounting for 100% (of which less than 1mm accounts for 10%).

[0067](2) Landfill stockpiling of waste desulfurizers: first mix the crushed waste desulfurizers with iron ore powder containing about 60% iron at a mass ratio of 1:10 to obtain a mixed powder containing waste desulfurizers. Then, the mixed powder is buried in the iron ore homogeneous powder stockpile containing about 60% iron at a mass ratio of 0.913:99.087, and the mixed ore powder containing 59.6...

Embodiment 3

[0080] A treatment method for applying waste desulfurizer to sintering, comprising the following steps:

[0081] (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%. The above-mentioned waste desulfurizer is crushed with a double-roll crusher until the particle size is less than 8mm, accounting for 100% (of which less than 1mm accounts for 10%).

[0082] (2) Landfill stockpiling of waste desulfurizers: first mix the crushed waste desulfurizers with iron ore powder containing about 60% iron at a mass ratio of 1:10 to obtain a mixed powder containing waste desulfurizers. Then the mixed material is buried in the iron ore homogeneous ore powder stockpile containing about 60% iron according to the mass ratio of 1.837:98.163, and the mixed ore powd...

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Abstract

The invention discloses a processing method of applying waste desulfurizing agents to sintering. The processing method includes the following steps that the waste desulfurizing agents are crushed intoparticles with the granularity smaller than 8 mm accounting for 100%, and with the granularity smaller than 1 mm accounting for 10%; evenly mixed powder is obtained by evenly mixing the crushed wastedesulfurizing agents and iron ore powder; evenly mixed ore powder is obtained by burying the evenly mixed powder in an iron ore powder pile; evenly mixed sintering powder is obtained by mixing the evenly mixed ore powder, iron ore powder, solid fuel, fluxing agents and return fines; water is added to the evenly mixed sintering powder to be subject to mixing and pelletizing to form evenly mixed sintering powder; sintered ore and sintering flue gas are obtained by sintering the pelletized materials; and the sintering flue gas is exhausted into the atmosphere after being subjected to desulfurization and denitrification. According to the processing method, the waste desulfurizing agents are crushed and then matched with the iron ore powder for sintering, the sintered ore is obtained for blastfurnace ironmaking, and iron, calcium and magnesium are recycled. Activated carbon absorbing sulfur dioxide can be used for desorbing the sulfur dioxide and making acid so as to recover sulfur. Thus,harmless disposal of the waste desulfurizing agents is carried out, and resource utilization of the waste desulfurizing agents is achieved.

Description

technical field [0001] The invention relates to the technical fields of metallurgy and material science, in particular to a treatment method for sintering waste desulfurizers. Background technique [0002] Desulfurizers are widely used in petroleum, chemical, metallurgy, electric power and other industries. The demand for desulfurizers in related industries such as the production of gas, natural gas and synthetic material gas is increasing, which also leads to an increase in waste desulfurizers. It is gradually becoming a new source of solid pollution. The desulfurizer referred to in the present invention is an iron oxide desulfurizer, and its desulfurization mechanism is to utilize Fe in the desulfurizer 2 o 3 Adsorb H in gas 2 S, producing elemental S, FeS, Fe 2 S 3 etc. At the same time, a part of tar naphthalene in the gas is adsorbed, and the shape of the desulfurizer after discarding is basically the same as that before desulfurization. [0003] The waste desulfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/24C22B1/18B01D53/00
CPCB01D53/00B01D2257/30B01D2257/40B01D2258/0283C22B1/18C22B1/2406
Inventor 朱德庆潘建郭正启李启厚杨聪聪田红宏李思维徐继伟王欣
Owner CENT SOUTH UNIV
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