Unlock instant, AI-driven research and patent intelligence for your innovation.

The Method of Changing the Excessive Throat Temperature Difference in Blast Furnace Smelting

A blast furnace smelting and furnace throat technology, which is applied in the field of changing the extremely large temperature difference of the blast furnace throat during blast furnace smelting, can solve the problems of increasing blast furnace production cost and long time consumption, and achieve the effect of reducing production cost and reducing recovery time

Active Publication Date: 2016-10-05
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method usually takes a week or longer to adjust the blast furnace conditions to normal production.
It takes too long, which undoubtedly increases the cost of blast furnace production

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using 1750m 3 Vanadium-Titanium Magnetite was smelted in a large blast furnace, and the temperature of the throat of the furnace was detected by a hot spot couple. When the temperature of the throat of the furnace was seriously uneven and the extreme difference was large (the extreme difference was 600°C), the air volume was decisively reduced to 80% of the normal air volume. % (i.e. by 3800m 3 / min reduced to 3040m 3 / min), small high-pressure operation is adopted, the furnace top pressure is controlled at 160-165Kpa, the charging system is changed from 4 rings to 2 rings, and the ore batch weight and coke load are reduced to 90% of the normal time (that is, the ore batch weight is changed from 45t is reduced to 40.5t, the coke load is reduced from 4.7t / t to 4.23t / t), when the furnace throat temperature tends to be normal, start to add air, gradually increase the ore batch weight and coke load, and increase the charging system in time, Adopt high-pressure operation, ...

Embodiment 2

[0024] Use 2000m 3 Vanadium-Titanium Magnetite was smelted in a large blast furnace, and the temperature of the throat of the furnace was detected by a hot spot couple. When the temperature of the throat of the furnace was seriously uneven and the extreme difference was large (the extreme difference was 50°C), the air volume was decisively reduced to 80% of the normal air volume. % (ie by 4500m 3 / min reduced to 3600m 3 / min), adopt small high-pressure operation, the top pressure is controlled at 160-170Kpa, the charging system is changed from 4 rings to 2 ring charging, and the ore batch weight and coke load are reduced to 90% of the normal time (that is, the ore batch weight is changed from 56t is reduced to 50.4t, the coke load is reduced from 4.8t / t to 4.32t / t), when the furnace throat temperature tends to be normal, start to add air, gradually increase the ore batch weight and coke load, and increase the charging system in time, Adopt high-pressure operation, the furnac...

Embodiment 3

[0026] Use 2500m 3 Vanadium-Titanium Magnetite was smelted in a large blast furnace, and the temperature of the throat of the furnace was detected by a hot spot couple. When the temperature of the throat of the furnace was seriously uneven and the extreme difference was large (the extreme difference was 300°C), the air volume was decisively reduced to 90% of the normal air volume. % (i.e. by 5800m 3 / min reduced to 5220m 3 / min), adopt small high-pressure operation, the top pressure is controlled at 165-175Kpa, the charging system is changed from 4-ring to 2-ring charging, and the ore batch weight and coke load are reduced to 90% of the normal time (that is, the ore batch weight is changed from 68t is reduced to 61.2t, the coke load is reduced from 4.8t / t to 4.32t / t), when the furnace throat temperature tends to be normal, start to add air, gradually increase the ore batch weight and coke load, and increase the charging system in time, Adopt high-pressure operation, the furn...

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 relates to a method for changing the too large temperature range of a furnace throat in the blast furnace smelting process, and belongs to the technical field of blast furnace smelting. The technical aim of providing the method for changing the too large temperature range of the furnace throat in the blast furnace smelting process is achieved. The method comprises the following steps that when the temperature range of the furnace throat is too large in the blast furnace vanadium-titanium smelting process, the air volume is reduced, meanwhile, small high pressure is adopted, a charging system is reduced, the ore batch weight and the coke load are reduced to 90 percent of those in the normal process, and when the temperature of the furnace throat tends to be normal, the air volume starts to be increased to be normal air volume, the ore batch weight and the coke load are increased to the normal level, the charging system is increased to the normal level, and high pressure operation is adopted. According to the method, normal production of a blast furnace can be restored through three smelting periods, restoration time can be greatly shortened, and production cost can be lowered.

Description

technical field [0001] The invention relates to a method for changing the extremely large temperature difference of a furnace throat during blast furnace smelting, and belongs to the technical field of blast furnace smelting. Background technique [0002] In the metallurgical industry, the blast furnace is an important equipment for ironmaking and steelmaking. Its shape is a vertical cylinder, which includes the blast furnace foundation, furnace shell, furnace lining, cooling equipment, columns and furnace frame. The internal space of a blast furnace is called the furnace type, which can be divided into five sections from top to bottom, namely the furnace throat, furnace body, furnace waist, furnace bosh and hearth. Among them, the furnace throat is located on the upper part of the blast furnace body and is cylindrical. The furnace throat is not only the entrance of the furnace charge, but also the outlet of the gas, which controls and regulates the distribution of the char...

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 张志强石军陆高峰邹仕华林文康毛建林江凌陈利孙小勇文贵江黄云干显
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD