A vertical two-stage blast furnace pulverized coal injection method

A two-stage, pulverized coal technology, applied in blast furnaces, blast furnace details, furnaces, etc., to achieve the effects of increasing coal ratio, improving gas utilization rate, and reducing fuel ratio and cost

Active Publication Date: 2019-09-03
NORTHEASTERN UNIV LIAONING
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can improve the gas flow distribution in the furnace and improve the gas utilization rate (η CO ) to solve the problems of gas flow distribution and gas permeability of the material column, so as to achieve rapid and effective injection, and achieve the beneficial effects of increasing the coal ratio, reducing the fuel ratio and cost

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
  • A vertical two-stage blast furnace pulverized coal injection method
  • A vertical two-stage blast furnace pulverized coal injection method
  • A vertical two-stage blast furnace pulverized coal injection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0037] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0038] This embodiment provides a vertical two-stage blast furnace pulverized coal injection method, specifically as follows:

[0039] The pulverized coal is injected into the blast furnace from the outside through a plurality of pulverized coal spray guns from the throat of the blast furnace from top to bottom driven by the high pressure of the carrier gas.

[0040] In this embodiment, the injection amount of the pulverized coal in each pulverized coal spray gun is 3-5 kg / tHM, and the mass ratio of the pulverized coal to the carrier gas is less than or equal to 20 kg / kg.

[0041] The injection pressure P of the pulverized coal at the mouth of the pulverized coal spray gun in this embodiment 喷 , the P 喷 It meets the following mathematical relationship:

[00...

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 belongs to the technical field of blast furnace ironmaking, and particularly relates to a vertical two-stage blast furnace coal injection method. The method specifically comprises the steps that pulverized coal is injected into a blast furnace from the outside from a furnace throat of the blast furnace from top to bottom under high pressure drive of carried gas through multiple pulverized coal injection guns; the injection amount of the pulverized coal in each pulverized coal injection gun ranges from 3 kg / tHM to 5 kg / tHM, and the mass ratio of the pulverized coal and the carriedgas is smaller than or equal to 20 kg / kg; and the injection pressure of the pulverized coal at pulverized coal injection gun muzzles is P<injection>, and P<injection> conforms to the following mathematic relation: P<injection>=P<air>+50 kPa-P<air>+150 kPa, wherein P<air> is the pressure of hot air of the blast furnace. According to the coal injection method, air flow distribution of coal in the furnace can be improved, the gas utilization rate (eta<CO>) can be improved so as to solve the problems about coal air flow distribution, material column air permeability and the like, and therefore rapid, effective and uniform injecting is achieved, and the advantages of improving the coal ratio and reducing the fuel ratio and cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking, and in particular relates to a vertical two-stage blast furnace pulverized coal injection method. Background technique [0002] Pulverized coal injection technology is one of the effective measures to reduce costs and increase efficiency in blast furnace ironmaking. Blast furnace coal injection can not only greatly reduce the coke ratio, but also adds a means of adjustment to blast furnace operation. Blast furnace operators can control the thermal state of the blast furnace by controlling coal injection. Therefore, the blast furnace pulverized coal injection process can greatly reduce the cost of pig iron, reduce the use of coke ratio, and improve the environment. In addition, the current distribution of blast furnace gas flow is not conducive to the utilization of blast furnace gas. Properly increasing the gas volume in the radial direction R / 3 (R is the radius of the furnace a...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
Inventor 沈峰满郑海燕沈岩松吴刚生姜鑫高强健白文广丁智敏相冬文
Owner NORTHEASTERN UNIV LIAONING
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