Iron making method introducing exhaust gas of hot-blast stove into blast furnace air

A blast furnace blast and hot blast stove technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as inability to reduce emissions, and achieve the effects of energy saving, coke saving, and air temperature improvement

Inactive Publication Date: 2013-12-04
符政学 +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of injecting these fuels is to use the combustible components in these fuels to replace one kind of low-priced energy with another high-priced energy. Although it can reduce production costs, it cannot reduce emissions

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 making method introducing exhaust gas of hot-blast stove into blast furnace air
  • Iron making method introducing exhaust gas of hot-blast stove into blast furnace air

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] 1. Refer to the attached Figure 1 After the combustion exhaust gas of the hot blast stove is cooled by heat transfer in the preheating furnace (4), it is discharged into the atmosphere by the flue (5) through the chimney (6). The air intake of the blast furnace blower (9) is partly to extract the atmosphere through the control valve (8), and the other part is to extract the hot blast stove waste gas from the flue (5) through the waste gas control valve (7). The ratio of blast furnace blower to air and hot blast stove waste gas is automatically controlled by the blast furnace duty room through regulating valves (7) and (8) according to the furnace temperature, oxygen enrichment rate and blast temperature in the blast furnace. The air drawn by the blast furnace blower according to the specified ratio and the exhaust gas of the hot blast stove are pressurized and enter the hot blast stove (3) through the cold air pipe (10) to be heated, and then blow into the tuyere area o...

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

An iron making method introducing the exhaust gas of a hot-blast stove into blast furnace air comprises the following steps: the exhaust gas of the hot-blast stove is introduced to the inlet of a blast furnace blower, the blast furnace blower simultaneously draws off the exhaust gas of the hot-blast stove and air or a special blower is mounted to draw off the exhaust gas of the hot-blast stove, and the drawn exhaust gas of the hot-blast stove is introduced into the blast furnace air, is heated by the hot-blast stove and is blasted to the tuyere area of a blast furnace. The iron making method is characterized in that the exhaust gas of the hot-blast stove is introduced into the blast furnace air, is heated and is blasted to the tuyere area of the blast furnace. The iron making method needs heat compensation and realizes the compensation through improving the air temperature and the rich oxygen. The temperature of the preheating combustion supporting air of a preheating furnace is above 500DEG C, the combustion temperature can reach 1550DEG C only through using the blast furnace gas, the supply air temperature reaches above 1350DEG C, and the temperature of the exhaust gas decreases to below 100DEG C. The iron making method introducing the exhaust gas of the hot-blast stove into the blast furnace air greatly adjusts the output, reduces the coke ratio and reduces the CO2 emission.

Description

technical field [0001] The invention belongs to the technical field of blast furnace ironmaking energy saving and emission reduction, and relates to a new ironmaking method for emission reduction and energy saving—an ironmaking method in which blast furnace exhaust gas is mixed with blast furnace exhaust gas. It is suitable for all blast furnaces with surplus air temperature and oxygen enrichment capacity. Background technique [0002] At present, all blast furnaces in my country and the world use pulverized coal or various oils or natural gas or various types of gas or waste plastics to blow into the tuyere of the blast furnace to reduce expensive metallurgical coke. The purpose of injecting these fuels is to utilize the combustible components in these fuels, to replace another high-priced energy with a low-priced energy. Although it can reduce production costs, it cannot reduce emissions. while CO 2 The emission of carbon dioxide has attracted the attention of the whole ...

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
Inventor 符政学符晓
Owner 符政学
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