Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for avoiding in-furnace detonation in furnace shutdown process of 3200 m3 blast furnace

A technology for blast furnaces and blast furnaces, which is applied to the safe shutdown of blast furnaces, avoiding the knocking in the blast furnace during the shutdown of the 3200m3 blast furnace, and avoiding the knocking in the blast furnace, which can solve the problems of prolonging the gas recovery time, low safety and cost High-level problems, to achieve the effect of safe shutdown, low shutdown cost, and easy operation

Inactive Publication Date: 2019-12-06
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this invention is to provide a method to avoid 3200m 3 The method of knocking in the furnace during the shutdown process of the blast furnace mainly solves the problem of 3200m in the prior art 3 The technical problems of low safety, low efficiency and high cost existing in the blast furnace shutdown process; the method of the present invention effectively avoids blast furnace knocking during the blast furnace shutdown process and prolongs the blast furnace shutdown process. The gas recovery time increases the amount of gas recovery and realizes the safety and environmental protection of the blast furnace shutdown process

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
  • Method for avoiding in-furnace detonation in furnace shutdown process of 3200 m3 blast furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, blast furnace volume is 3200m 3 , refer to figure 1 , an avoidance of 3200m 3 A method for generating knocking in a blast furnace during shutdown, comprising the following steps:

[0027]1) Complete the laying of the nitrogen pipeline 3 between the nitrogen pipeline 5 near the blast furnace and the furnace shaft coal injection hole 10 before the pre-shutdown of the blast furnace, and install a manual shut-off valve a 12, a pressure gauge a 14 and a nitrogen flow meter a 16 on the pipeline ,; Similarly, the nitrogen pipeline 4 laying between the nitrogen pipeline 5 near the blast furnace and the static pressure hole 11 of the furnace body is completed before the pre-shutdown of the blast furnace, and a manual shut-off valve b 13, a pressure gauge b 15 and a nitrogen flow meter are installed on the pipeline b 17; Complete the external laying between the nitrogen pipeline 3 and the coal injection hole 10, the external laying of the nitrogen pipeline 4 and t...

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

No PUM Login to View More

Abstract

The invention discloses a method for avoiding an in-furnace detonation in the furnace shutdown process of a 3200 m3 blast furnace. The technical problems of low safety, low efficiency and high cost existing in the furnace shutdown process of a 3200 m3 blast furnace in the prior art are mainly solved. According to the technical scheme, the method for avoiding the in-furnace detonation in the furnace shutdown process of the 3200 m3 blast furnace comprises the steps that before the furnace shutdown of the blast furnace begins, nitrogen pipelines communicating with a blast furnace body coal injection hole and a furnace body static pressure hole are added correspondingly; at the beginning stage of a blast furnace shutdown descending stockline, steam is injected into the blast furnace through the blast furnace top, and nitrogen is injected into the blast furnace through a blast furnace tuyere, the blast furnace body coal injection hole and the furnace body static pressure hole correspondingly; and from when a stockline in the blast furnace is lowered to the blast furnace body static pressure hole to the end of the blast furnace shutdown, the flow of the nitrogen injected at the blast furnace body static pressure hole is controlled to 6800-7200 Nm3 / h. The method is safe, reliable, easy and convenient to operate and low in cost.

Description

technical field [0001] The invention relates to a method for safe shutdown of a blast furnace, in particular to a method for avoiding 3200m 3 Method for producing blast furnace knocking during shutdown of blast furnace, specifically, involving 3200m 3 The invention relates to a method for avoiding knocking in the blast furnace during shutdown of the blast furnace to empty the material line, and belongs to the technical field of iron and steel metallurgy blast furnace ironmaking. Background technique [0002] During the process of blast furnace shutdown and empty material line, as the material line continues to drop, the temperature of the material surface continues to rise, and the reaction between furnace top water and red hot coke water gas is intensified; as the material line continues to decline, the ore layer continues to thin, The indirect reduction zone continues to melt until it disappears, and the H produced by the reaction in the lower high-temperature zone 2 →H ...

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): C21B5/00
CPCC21B5/00C21B5/006C21B2300/02
Inventor 董跃玲杨文光王启敏
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com