Iron ore sintering method capable of simultaneously improving sinter reducibility and reducing nitrogen oxide emission

A nitrogen oxide and sintering method technology is applied in the field of iron ore sintering to achieve the effects of improving reducibility, improving reducibility and reducing dosage

Pending Publication Date: 2020-08-21
NANKAI UNIV
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect that there is no related technology in the prior art th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Iron ore sintering method capable of simultaneously improving sinter reducibility and reducing nitrogen oxide emission
  • Iron ore sintering method capable of simultaneously improving sinter reducibility and reducing nitrogen oxide emission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides an iron ore sintering method that can simultaneously improve the reducibility of sintered ore and reduce the emission of nitrogen oxides. The specific operation steps are as follows:

[0036] Batching: quality batching method, each raw material is blended with raw materials in a certain proportion.

[0037] Primary mixing: manual mixing of 41.48kg iron ore powder, 2.63kg water washing material, 4.73kg tank return material, 1.47kg magnesium stone powder, 0.26kg dolomite powder, 0.79kg dust removal ash and 1.16kg steel slag.

[0038] Secondary mixing: Add 52.52kg of primary mixing to 8.4kg of returned ore, 4.9kg of quicklime, 1.4kg of dedusting ash, 2.4kg of coke powder, 5.6kg of water and continue to mix and granulate, and spray 0.48kg of methanol.

[0039] Fabric: Set the sintered ore with a particle size of 10-16mm on the grating bar of the sintering cup as the bottom material, with a thickness of about 20mm. The size of the sintering cup is Φ...

Embodiment 2

[0043] This embodiment provides an iron ore sintering method that can simultaneously improve the reducibility of sintered ore and reduce the emission of nitrogen oxides. The specific operation steps are as follows:

[0044] Batching: quality batching method, each raw material is blended with raw materials in a certain proportion.

[0045] Primary mixing: manual mixing of 41.48kg iron ore powder, 2.63kg water washing material, 4.73kg tank return material, 1.47kg magnesium stone powder, 0.26kg dolomite powder, 0.79kg dust removal ash and 1.16kg steel slag.

[0046] Secondary mixing: Add 52.52kg of primary mixing to 8.4kg of returned ore, 4.9kg of quicklime, 1.4kg of dedusting ash, 2.52kg of coke powder, and 5.6kg of water to continue mixing and granulating, and spray 0.32kg of methanol.

[0047]Fabric: Set the sintered ore with particle size of 10-16mm on the grating bar of the sintering cup as the bottom material, and the thickness is generally about 20mm. The size of the sint...

Embodiment 3

[0051] This embodiment provides an iron ore sintering method that can simultaneously improve the reducibility of sintered ore and reduce the emission of nitrogen oxides. The specific operation steps are as follows:

[0052] Batching: quality batching method, each raw material is blended with raw materials in a certain proportion.

[0053] Primary mixing: Manually mix 42kg iron ore powder, 2.54kg washing material, 5kg tank return material, 1.64kg magnesium stone powder, 0.23kg dolomite powder, 0.82kg dust removal ash and 1.10kg steel slag.

[0054] Secondary mixing: add 53.33kg of primary mixing to 8.2kg of returned ore, 4.8kg of quicklime, 1.35kg of dedusting ash, 2.6kg of coke powder, 5.3kg of water, continue mixing and granulating, and spray 0.45kg of methanol.

[0055] Fabric: Set the sintered ore with particle size of 10-16mm on the grating bar of the sintering cup as the bottom material, and the thickness is generally about 20mm. The size of the sintering cup is Φ300×100...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention belongs to the technical field of iron ore sintering, and particularly relates to an iron ore sintering method capable of simultaneously improving sinter reducibility and reducing nitrogen oxide emission. The method comprises the steps of batching, primary mixing, secondary mixing, distributing, ignition and sintering, wherein low-carbon alcohol is added in the secondary mixing step.The inventor found through research that adding an appropriate amount of the low-carbon alcohol into the secondary mixing can adjust the sintering temperature during the sintering process and prolongthe sintering time. The sinter reducibility can be improved and also the nitrogen oxide emission is significantly reduced. Particularly, compared with a blank test, the content of ferrous oxide in the sinter can be reduced from 11% to 9.6%, and the sinter reducibility is significantly improved; at the same time, compared with the blank test, the total concentration of nitric oxide and nitrogen oxide in sintering flue gas is decreased.

Description

technical field [0001] The invention belongs to the technical field of iron ore sintering, and in particular relates to an iron ore sintering method capable of simultaneously improving the reduction of sintered ore and reducing the emission of nitrogen oxides. Background technique [0002] Iron ore sintering is an important process in iron and steel production. It is the process of sintering raw materials such as iron ore powder, fuel, flux and various return materials under certain conditions into artificial rich ore to provide raw materials for blast furnace ironmaking. As the most important iron-containing charge of blast furnace, sinter's reducibility has an important influence on the operation and consumption of blast furnace. Reducibility refers to the difficulty of oxygen combined with iron in iron ore being captured by gas reducing agent, that is, the difficulty of indirect reduction. When sinter with poor reducibility is loaded into the blast furnace, it will first...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B1/16
CPCC22B1/16
Inventor 于宏兵李英杰于晗王通曹玉鑫
Owner NANKAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap