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

Material distribution method for high-proportion pellet coke extraction

A high-proportion, pelletizing technology, which is applied in the field of high-proportion pellet coke extraction, can solve the problems of blast furnace air flow instability and blast furnace throat material surface instability, and achieve simple process, improved gas utilization rate, and operability strong effect

Active Publication Date: 2021-10-29
ANGANG STEEL CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a material distribution method for coke extraction with a high proportion of pellets, which can avoid the instability of the throat material surface of the blast furnace due to the increase in the proportion of pellets, and solve the problem of unstable air flow in the blast furnace due to the easy rolling of the pellets. At the same time, the economic and technical indicators of the blast furnace have been improved

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

[0033] Take a steel factory 2580m 3 Take the blast furnace as an example. The ironmaking raw materials used in the blast furnace are 70% pellets + 30% sinter. The batch weight of the ironmaking raw materials used in this embodiment is: the batch weight of coke is 14t;

[0034] When loading ore, control the feeding sequence of the ore trough on the feeding belt as follows: sinter and pellets to ensure that the sinter falls to the bottom of the tank, and the sinter can be distributed to the edge of the blast furnace when distributing.

[0035] Extract 5% of the normal batch weight of each batch of coke, that is, 0.7t for use;

[0036] Control the coke outermost ring angle to 43.3° (0.3° greater than the blast furnace outermost coke limit angle of 43°); control the difference between the coke distribution outermost ring chute angle and the sub-center chute inclination angle to 14.2°; coke distribution outermost ring chute The inclination angle is 1.6° larger than the inclinatio...

Embodiment 2

[0047] In this embodiment, the steel plant 3200m 3 Take the blast furnace as an example, the blast furnace uses 100% pellets + 0% sinter as raw material for ironmaking. The batch weight of the ironmaking raw materials used in this embodiment is: the batch weight of coke is 17t; the batch weight of ore is 90t, and all of them are pellets.

[0048] When loading ore, control the feeding sequence of the ore trough on the belt as follows: flux, pellets, ensure that the flux falls to the bottom of the ore trough, and spread the flux to the edge of the blast furnace.

[0049] Each batch of coke is extracted 5% of the normal batch weight, that is, 0.85t for use.

[0050] Control the coke outermost ring angle to 42.2° (0.2° greater than the blast furnace outermost coke limit angle of 42°); control the difference between the coke distribution outermost ring chute angle and the sub-center chute inclination angle to 13.3°; coke distribution outermost ring chute The inclination angle is ...

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 material distribution method for high-proportion pellet coke extraction. The material distribution method for the high-proportion pellet coke extraction comprises the following measures of controlling the proportion of pellets in ore batches, distributing materials into a blast furnace in a bell-less multi-ring material distribution mode, extracting 4%-6% of the weight of each batch of coke during material distribution, independently distributing the extracted coke to the center of the blast furnace after 5-20 batches of materials are distributed every time, and the like. According to the material distribution method for the high-proportion pellet coke extraction, the situation that the blast furnace throat charge level is unstable due to the fact that the pellet proportion is increased can be avoided, the problem that blast furnace airflow is unstable due to the fact that pellets are prone to rolling is solved, and meanwhile the economic and technical indexes of the blast furnace are improved.

Description

technical field [0001] The invention relates to the technical field of blast furnace material distribution, in particular to a material distribution method for extracting coke from high-proportion pellets. Background technique [0002] Increasing the proportion of pellets in the blast furnace charge can increase the iron grade of the furnace ore, reduce the amount of ore per ton of iron, reduce the fuel ratio, increase production, reduce pollutant emissions, promote energy saving and emission reduction in the ironmaking system, and reduce The cost of flue gas treatment in the agglomeration process is also an important measure to realize the reduction of blast furnace production and the minimization of dissipation. As the national environmental protection requirements become more and more stringent, more and more attention is paid to the environmental pollution caused by sinter production. Blast furnace smelting has become the development trend of blast furnace ironmaking in ...

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): C21B7/20C21B5/00
CPCC21B7/20C21B5/008Y02P10/20
Inventor 姜喆朱建伟郭天永车玉满姚硕张延辉谢明辉邵思维曾宇张磊
Owner ANGANG STEEL CO LTD