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Blast-furnace burden distribution method for high-proportion pellets

A high-proportion, material-distributing technology, applied in the field of blast furnace material distribution with high-proportion pellets, can solve the problems of blast furnace irregularity, increased pellet ratio, and difficulty in precise material distribution, so as to ensure stable and smooth operation, strong operability, The effect of simple process

Inactive Publication Date: 2017-09-01
TANGSHAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the pellets naturally have a small pile angle and are easy to roll, when the proportion of pellets is high, it is difficult to accurately distribute the pellets in the blast furnace; if proper measures are not taken, the pellets are easy to roll to the center of the blast furnace and The edge part causes the instability of the airflow at the center and the edge, which leads to the unsmoothness of the blast furnace, which is one of the reasons currently restricting the increase in the proportion of pellets in the blast furnace

Method used

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  • Blast-furnace burden distribution method for high-proportion pellets
  • Blast-furnace burden distribution method for high-proportion pellets
  • Blast-furnace burden distribution method for high-proportion pellets

Examples

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Effect test

Embodiment 1

[0019] Embodiment 1: The blast furnace material distribution method of the high-proportion pellets adopts the following specific process.

[0020] Blast furnace effective volume 1000m 3 , the proportion of pellets is 30%, the proportion of sinter, lump ore, limestone, steel slag, etc. is 70%, and the coke ratio is 20kg / t-Fe; the distribution matrix is ​​shown in Table 1.

[0021] Table 1: Cloth matrix of Example 1

[0022]

[0023] Among them, in the ore distribution matrix, the 3 circles of the 39° distribution gear and the 2 circles of the 30° distribution gear are all sintered ore, and the middle gears are pellets and the remaining sinter, lump ore, limestone, steel slag, etc. All coke is mixed with pellets. During the smelting process, the blast furnace runs smoothly.

Embodiment 2

[0024] Embodiment 2: The method for distributing material for the blast furnace with high proportion pellets adopts the following specific process.

[0025] Blast furnace effective volume 1000m 3 , the ratio of pellets is 50%, the ratio of sinter, lump ore, limestone, steel slag, etc. is 50%, and the coke ratio is 30kg / t-Fe; the distribution matrix is ​​shown in Table 2.

[0026] Table 2: the cloth matrix of embodiment 2

[0027]

[0028] Among them, in the ore distribution matrix, the 3 circles of the 39° distribution gear and the 2 circles of the 28° distribution gear are all sintered ore, and the middle gears are pellets and the remaining sinter, lump ore, limestone, steel slag, etc. All coke is mixed with pellets. During the smelting process, the blast furnace runs smoothly.

Embodiment 3

[0029] Embodiment 3: The method of distributing material for the blast furnace with high proportion pellets adopts the following specific process.

[0030] Blast furnace effective volume 1000m 3 , the ratio of pellets is 80%, the ratio of sinter, lump ore, limestone, steel slag, etc. is 20%, and the coke ratio is 40kg / t-Fe; the distribution matrix is ​​shown in Table 3.

[0031] Table 3: The cloth matrix of embodiment 3

[0032]

[0033] Among them, in the ore distribution matrix, the 2 circles of the 39° distribution stalls are all sintered ore, and the other distribution stalls are pellets and the remaining sinter, lump ore, limestone, steel slag, etc. All coke is mixed with pellets. During the smelting process, the blast furnace runs smoothly.

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Abstract

The invention discloses a method for distributing material for a blast furnace with a high proportion of pellets. The process is as follows: the ore to be fed into the furnace includes pellets and sintered ore; the pellets and coke are mixed into the furnace; When the amount of pellets accounts for 30% to 60% of the total ore, the sintered ore is placed at both ends of the cloth stall, and the other ore is placed in the middle of the cloth stall; when the pellets account for more than 60% of the total ore, the sintered ore is placed The stalls on the edge of the furnace throat, and other ores are distributed in other stalls. The method effectively controls the rolling of the pellets by optimizing the material distribution matrix, and stabilizes the forward movement of the blast furnace while increasing the ratio of the pellets into the furnace. This method can effectively control the rolling effect of the pellets in the furnace when the high proportion of pellets is smelted in the blast furnace, which is conducive to stabilizing the two airflows at the edge and center of the furnace, controlling the reasonable operation of the furnace type, and ensuring the stability of the blast furnace. It has the characteristics of strong operability, simple process and easy realization.

Description

technical field [0001] The invention relates to a method for distributing materials for a blast furnace, in particular to a method for distributing materials for a blast furnace with a high proportion of pellets. Background technique [0002] Gradually using pellets instead of sinter and increasing the proportion of pellets used in blast furnaces is the current development trend of environmentally friendly blast furnace ironmaking. However, because the pellets naturally have a small pile angle and are easy to roll, when the proportion of pellets is high, it is difficult to accurately distribute the pellets in the blast furnace; if proper measures are not taken, the pellets are easy to roll to the center of the blast furnace and The edge part causes the instability of the center and edge airflow, which leads to the unsmoothness of the blast furnace, which is also one of the reasons that currently limit the increase in the proportion of pellets in the blast furnace. Therefore...

Claims

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Application Information

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IPC IPC(8): C21B7/20C21B5/00
CPCC21B7/20C21B5/00
Inventor 于勇王新东王兰玉田欣刘连继肖洪魏福申张文强高冰
Owner TANGSHAN IRON & STEEL GROUP
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