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Sintering mixture and mixing method, sintering ore and sintering method

A technology for sintering mixture and sintering method, applied in the field of iron ore sintering, can solve the problems of affecting the quality of sintered ore, unsatisfactory sintering mixture, complicated mixing steps, etc., so as to improve particle size and particle structure, output and yield. The effect of improving and improving the air permeability

Inactive Publication Date: 2020-08-21
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the sintering mixture in the prior art cannot meet the requirements of the ultra-thick material layer sintering technology with a material layer thickness of about 1000 mm, thereby affecting the quality of the sinter ore and the cumbersome mixing steps. Thereby providing a sintering mixture and mixing method, sintering ore and sintering method

Method used

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  • Sintering mixture and mixing method, sintering ore and sintering method
  • Sintering mixture and mixing method, sintering ore and sintering method
  • Sintering mixture and mixing method, sintering ore and sintering method

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Embodiment 1

[0066] The present embodiment provides a kind of sintering method of sintering mixture, concrete steps are as follows:

[0067] (1) Add 100kg of iron ore powder to be sintered (80% of which has a particle size of less than or equal to 1mm, and 20% of which has a particle size of 1-3mm), and 18kg of 1-2mm returned ore A into the mixture machine for dry mixing for 4 minutes;

[0068] (2) Add 2.5kg of coke powder with a particle size of less than 1mm and 8.0kg of quicklime with a particle size of less than 1mm to the dry material obtained in step 1, and continue dry mixing for 3 minutes to obtain a mixed material;

[0069] (3) add 5% (mass fraction) polyvinyl alcohol (PVA) aqueous solution of 7.5kg, 9.5kg particle size in the one mixed material that step (2) obtains, continue to mix after returning ore second about 3mm, Get the second mixture;

[0070] (4) steam heating the second mixed material obtained in step (3), the material temperature is increased to 75° C., and the seco...

Embodiment 2

[0073] The present embodiment provides a kind of sintering method of sintering mixture, concrete steps are as follows:

[0074] (1) Add 100kg of iron ore powder to be sintered (80% of which has a particle size of less than or equal to 1mm, and 20% of which has a particle size of 1-3mm), and 20kg of 1-2mm return ore (A) The mixer carried out dry mixing for 5 minutes;

[0075] (2) Add 3.5kg of coke powder with a particle size of less than 1mm and 9kg of quicklime with a particle size of less than 1mm in the dry material obtained in step (1), and continue to dry mix for 3 minutes to obtain a mixed material;

[0076] (3) add the 5% (mass fraction) polyvinyl alcohol (PVA) aqueous solution of 8kg, 10kg particle size in the mixed batch that step (2) obtains, continue to mix after 4.5 minutes after returning ore B of about 3mm, obtain Second mix;

[0077] (4) steam heating the second mixed material obtained in step (3), the temperature of the material is increased to 74 ° C, and the...

Embodiment 3

[0080] The present embodiment provides a kind of sintering method of sintering mixture, concrete steps are as follows:

[0081] (1) Add 100kg of iron ore powder to be sintered (80% of which has a particle size of less than or equal to 1mm, and 20% of which has a particle size of 1-3mm), and 14kg of 1-2mm returned ore A into the mixture machine for dry mixing for 3 minutes;

[0082] (2) Add 2.5kg of coke powder with a particle size less than 1mm and 7.5kg of quicklime with a particle size less than 1mm in the dry material obtained in step (1), and continue to dry mix for 3 minutes to obtain a mixed material;

[0083] (3) add 5% (mass fraction) polyvinyl alcohol (PVA) aqueous solution, 9kg particle size to the one mixed material that step (2) obtains, continue to mix after 4.5 minutes after returning ore second about 3mm, obtain two mix;

[0084] (4) steam heating the second mixed material obtained in step (3), the material temperature is increased to 75°C, and the second mixe...

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Abstract

The invention belongs to the technical field of iron ore sintering, and particularly relates to a sintering mixture and a mixing method, sintering ore and a sintering method. The sintering mixture comprises the following components in parts by weight: 90-110 parts of iron ore powder to be sintered, 14-20 parts of returned ore A, 8.5-10.5 parts of returned ore B, 2-4 parts of coke powder, 7-9 partsof quicklime and 6.5-8.5 parts of adhesives, wherein the particle size of the returned ore A is 1-2 mm, and the particle size of the returned ore B is 2.5-5 mm. Through adding the adhesives with an adhesive effect and the returned ore A and the returned ore B with specific particle sizes to the sintered mixture, the particle size and particle structure of the sintering mixture are further improved, so that microparticles with the returned ore as cores are formed, the air permeability of a material layer is greatly improved, the sintering requirement of an ultra-thick material layer of 1000 mmor above is fully met, and the air permeability and the vertical combustion speed of a sintering material layer, and the output and yield of the sintering ore are all improved to various degrees.

Description

technical field [0001] The invention belongs to the technical field of iron ore sintering, and in particular relates to a sintering mixture and a mixing method, sintering ore and a sintering method. Background technique [0002] Thick layer low temperature sintering technology is an advanced sintering technology that has been widely used in recent years. Based on the theory of calcium ferrite consolidation and the automatic heat storage effect of the sintering process, thick material layer sintering can reduce solid fuel consumption, reduce carbon oxide emissions, reduce the thickness of the combustion zone, reduce the ferrous content of sintered ore, and promote the formation of calcium ferrite. generation, improving the mineral structure of sinter, increasing the strength of sinter, increasing the yield of sinter and so on. However, when the sintered material layer reaches a certain thickness, the air permeability of the material layer will deteriorate, the sintering spee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/244C22B1/16
CPCC22B1/16C22B1/2406C22B1/244
Inventor 于宏兵曹玉鑫于晗李英杰
Owner NANKAI UNIV
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