Recovery method of blast furnace dedusting ash and blast furnace dedusting ash sintering material

A technology of blast furnace dust removal and recovery method, applied in the field of metallurgy, can solve the problem of low utilization degree of blast furnace dust dust, and achieve the effects of improving the sintering utilization coefficient, increasing the output, and improving the utilization rate

Inactive Publication Date: 2017-12-01
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a recovery method of blast furnace dust removal ash to solve the problem of low utilization degree of blast furnace dust removal ash
[0005] The second object of the present invention is to provide a sintered blast furnace dust removal material to solve the problem of low utilization of blast furnace dust removal

Method used

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  • Recovery method of blast furnace dedusting ash and blast furnace dedusting ash sintering material
  • Recovery method of blast furnace dedusting ash and blast furnace dedusting ash sintering material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of blast furnace dedusting ash sintered material provided in this embodiment is prepared in the following way:

[0044] The composition of selected blast furnace dust is: ω(TFe)>55%, ω(FeO)>10%, ω(CaO)>9.5%, ω(SiO 2 )>6.0%, ω(MgO)>2.5%, ω(Al 2 o 3 )>3.0%, ω(V 2 o 5 )>0.04%, ω (particle size less than 0.074mm>90%.

[0045]Mechanically mix blast furnace dedusting ash and mixed water to make blast furnace dedusting mortar, then put the dedusting mortar into the mixer for mixing and granulation, control the moisture content of the sintering mixture at 7.5±0.2%, and then pass the grading sieve to test the mixture Material particle size composition. Among them, blast furnace dedusting mortar accounts for 1wt% of the mixture.

[0046] The mixture is put into a sintering cup for sintering by ignition and ventilation. The particle size of the bottoming material for the sintering cup is 10 mm, the thickness of the bottoming material is 18 mm, and the total thickness ...

Embodiment 2

[0048] A kind of blast furnace dedusting ash sintered material provided in this embodiment is prepared in the following way:

[0049] The composition of selected blast furnace dust is: ω(TFe)>55%, ω(FeO)>10%, ω(CaO)>9.5%, ω(SiO 2 )>6.0%, ω(MgO)>2.5%, ω(Al 2 o 3 )>3.0%, ω(V 2 o 5 )>0.04%, ω (particle size less than 0.074mm>90%.

[0050] Mechanically mix blast furnace dedusting ash and mixed water to make blast furnace dedusting mortar, then put the dedusting mortar into the mixer for mixing and granulation, control the moisture content of the sintering mixture at 7.5±0.2%, and then pass the grading sieve to test the mixture Material particle size composition. Among them, blast furnace dedusting mortar accounts for 2wt% of the mixture.

[0051] The mixture is put into a sintering cup for sintering by ignition and ventilation. The particle size of the bottoming material for the sintering cup is 16mm, the thickness of the bottoming material is 22mm, and the total thickness o...

Embodiment 3

[0053] A kind of blast furnace dedusting ash sintered material provided in this embodiment is prepared in the following way:

[0054] The composition of selected blast furnace dust is: ω(TFe)>55%, ω(FeO)>10%, ω(CaO)>9.5%, ω(SiO 2 )>6.0%, ω(MgO)>2.5%, ω(Al 2 o 3 )>3.0%, ω(V 2 o 5 )>0.04%, ω (particle size less than 0.074mm>90%.

[0055] Mechanically mix blast furnace dedusting ash and mixed water to make blast furnace dedusting mortar, then put the dedusting mortar into the mixer for mixing and granulation, control the moisture content of the sintering mixture at 7.5±0.2%, and then pass the grading sieve to test the mixture Material particle size composition. Among them, blast furnace dedusting mortar accounts for 3wt% of the mixture.

[0056] The mixture is put into a sintering cup for sintering by ignition and ventilation. The particle size of the bottoming material for the sintering cup is 12 mm, the thickness of the bottoming material is 20 mm, and the total thickness...

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Abstract

The invention relates to the metallurgical field, in particular to a recovery method of blast furnace dedusting ash and a blast furnace dedusting ash sintering material. According to the method, the blast furnace dedusting ash and sintering mixing water are mixed, and blast furnace dedusting ash mortar is made. The blast furnace dedusting ash mortar, an iron-containing material, a fluxing agent, fuel and return mine are subjected to mixing granulation, and a mixed material is made; and finally, the mixed material is sintered. The blast furnace dedusting ash mortar is adopted to perform sintering, the mixed material grain composition can be remarkably improved, the proportion of the +3 mm part in the sintered mixed material is increased, an obvious effect is achieved for improving the breathability of a mixed material layer, and therefore the sintering utilizing coefficient is improved, the sintering mine yield is increased, and therefore the utilizing rate of the blast furnace dedusting ash is greatly increased. The blast furnace dedusting ash sintering material made through the recovery method of the blast furnace dedusting ash is good in breathability and high in sintering utilizing rate.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a method for recovering blast furnace dedusting ash and a blast furnace dedusting ash sintering material. Background technique [0002] At present, the blast furnace dust removal system is carried out by gravity dust removal and electric dust removal. We call the gas ash obtained by gravity dust removal, and its particle size is relatively large. The total iron in the slag includes iron oxide, ferrous oxide, elemental iron and iron. The content of other compounds (TFe) is low; and the dust obtained by electrostatic precipitator is called bag ash or blast furnace dust, and the particle size is relatively fine. It is found through screening that the -200 mesh part is more than 90%, and the TFe content is high. Through chemical composition analysis, it is found that the content of TFe is more than 55%, which belongs to relatively high-quality secondary resources. [0003] Now the general ...

Claims

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Application Information

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IPC IPC(8): C21B3/04C22B1/16C22B1/24
CPCC21B3/04C22B1/16C22B1/2406Y02W30/50Y02P10/20
Inventor 胡鹏付卫国唐文博饶家庭
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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