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Method of matching coke into furnace during blast furnace smelting

A blast furnace smelting and coke technology, applied in blast furnaces, blast furnace details, furnaces, etc., can solve problems such as the shortage of coking coal resources, rising ironmaking costs, and excess indicators, so as to save resources, reduce ironmaking costs, and prevent coke indicators excess effect

Active Publication Date: 2018-12-18
TANGSHAN IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, my country's high-quality coking coal resources are in short supply, and the cost is relatively high. If all the indicators of coke are excessively pursued to reach a high level, it will not only increase the cost of ironmaking, but also make some indicators redundant, further exacerbating the demand for coking coal. shortage of resources

Method used

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  • Method of matching coke into furnace during blast furnace smelting

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: The specific process of the method of matching coke into the furnace during the blast furnace smelting process is as follows.

[0015] Blast furnace effective volume 1000m 3 , other raw fuel quality and operating parameters are normal. There are 4 types of coke used, the indicators are:

[0016] Coke 1: CSR 70%, M 10 5.5%, average particle size 55mm, M 40 90%, Ash 11%, CRI 20%, Sulfur 0.6%;

[0017] Coke 2: CSR 65%, M 10 5.8%, average particle size 50mm, M 40 86%, Ash 12.5%, CRI 25%, Sulfur 0.75%;

[0018] Coke 3: CSR 60%, M 10 7%, average particle size 43mm, M 40 82%, Ash 13%, CRI 28%, Sulfur 0.85%;

[0019] Coke 4: CSR 50%, M 10 8.5%, average particle size 38mm, M 40 70%, Ash 13%, CRI 35%, Sulfur 9%.

[0020] According to 1000m 3 The coke quality requirements of the blast furnace and the actual state of blast furnace smelting, through the weighted average of the four coke indicators, the CSR index reaches 60%, and the blast furnace i...

Embodiment 2

[0021] Embodiment 2: The specific process of the method of matching coke into the furnace during the blast furnace smelting process is as follows.

[0022] Blast furnace effective volume 2000m 3 , other raw fuel quality and operating parameters are normal. There are 4 types of coke used, the indicators are:

[0023] Coke 1: CSR 70%, M 10 5.5%, average particle size 55mm, M 40 90%, Ash 11%, CRI 20%, Sulfur 0.6%;

[0024] Coke 2: CSR 65%, M 10 5.8%, average particle size 50mm, M 40 86%, Ash 12.5%, CRI 25%, Sulfur 0.75%;

[0025] Coke 3: CSR 60%, M 10 7%, average particle size 43mm, M 40 82%, Ash 13%, CRI 28%, Sulfur 0.85%;

[0026] Coke 4: CSR 50%, M 10 8.5%, average particle size 38mm, M 40 70%, Ash 13%, CRI 35%, Sulfur 0.9%.

[0027] According to 2000m 3 The quality requirements of blast furnace coke and the actual state of blast furnace smelting, through the weighted average of the four coke indicators, the CSR index reaches 62%, and the blast furnace ope...

Embodiment 3

[0028] Embodiment 3: The specific process of the method of matching coke into the furnace in the blast furnace smelting process is as follows.

[0029] Blast furnace effective volume 3000m 3 , other raw fuel quality and operating parameters are normal. There are 4 types of coke used, the indicators are:

[0030] Coke 1: CSR 70%, M 10 5.5%, average particle size 55mm, M 40 90%, Ash 11%, CRI 20%, Sulfur 0.6%;

[0031] Coke 2: CSR 65%, M 10 5.8%, average particle size 50mm, M 40 86%, Ash 12.5%, CRI 25%, Sulfur 0.75%;

[0032] Coke 3: CSR 60%, M 10 7%, average particle size 43mm, M 40 82%, Ash 13%, CRI 28%, Sulfur 0.85%;

[0033] Coke 4: CSR 50%, M 10 8.5%, average particle size 38mm, M 40 70%, Ash 13%, CRI 35%, Sulfur 0.9%.

[0034] According to 3000m 3 The quality requirements of blast furnace coke and the actual state of blast furnace smelting, through the weighted average of 4 kinds of coke indexes, make the CSR index reach 63%. 10 index such that M 10 The...

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Abstract

The invention discloses a method for matching coke and adding the coke into a furnace in the blast furnace smelting process. The technology of the method comprises the steps that according to the smelting need, the coke is matched according to the high-low sequence of indexes and added into the blast furnace; according to the indexes from high to low, CSR>M10>the average grain size>M40>the ash content>CRI>the sulfur content; the coke is firstly matched according to the indexes of the highest sequence and added into the blast furnace; if the operation state of the blast furnace is good, coke index modification is stopped; if the operation state of the blast furnace is still poor, the coke is matched according to the indexes of the next sequence and added into the blast furnace; and whether the coke is matched according to the indexes of the next sequence or not is judged according to the operation state of the blast furnace till the operation state of the blast furnace is good. According to the method, the technical aim of adding multiple kinds of coke into the furnace at the same time can be achieved, the situation of excessive coke indexes is avoided, and high-quality coking coal resources are saved; and it is guaranteed that the blast furnace stably and smoothly operates, and meanwhile the ironmaking cost is reduced. The method has the beneficial effects of being simple in technology, high in operability and easy to implement.

Description

technical field [0001] The invention belongs to the field of blast furnace ironmaking, in particular to a method for matching coke into a furnace during the blast furnace smelting process. Background technique [0002] Both theoretical research and actual production have proved that coke quality is an important factor affecting the operation status of blast furnaces. The current situation in the iron and steel industry is severe. In order to reduce costs and increase efficiency, various production plants use various cokes in the blast furnace at the same time. Adjustment. Therefore, how to efficiently and reasonably match coke to maximize its role in the blast furnace while reducing production costs as much as possible is an important issue facing the current production unit. On the other hand, my country's high-quality coking coal resources are in short supply, and the cost is relatively high. If all the indicators of coke are excessively pursued to reach a high level, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B5/00
CPCC21B5/007
Inventor 高冰肖洪张文强孔德文曹维超陈永星陈鹏贾凤娟李晓云李玉庚
Owner TANGSHAN IRON & STEEL GROUP
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