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Method for reducing iron consumption

A technology for reducing iron and molten iron, applied in the direction of manufacturing converters, improving process efficiency, etc., can solve the problems of low cost, insufficient supply of molten iron, high cost of molten iron, etc., and achieve the effects of simple reduction, stable operation, and simple method of iron consumption

Active Publication Date: 2019-01-04
LINZHOU FENGBAO PIPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are certain disadvantages in the existing method of reducing iron consumption. First, with the continuous increase of steel production, the supply of molten iron is insufficient due to the maintenance of blast furnaces. Secondly, the cost of scrap steel is lower than that of molten iron, and the cost of molten iron is higher. , we propose a method to reduce iron consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) pour the amount of slag of 40wt% in furnace;

[0029] (2) Pass 97,000t of qualified molten iron into the heating furnace for heating. The heating temperature of the molten iron is 1270°C, and the heating time is 0.8h, and a carbonaceous heating agent is added to the furnace to increase the heat source;

[0030] (3) drop the molten iron heated in the step (2) into the oxygen top-blown converter, and at the same time, add 11000t qualified scrap steel in the oxygen top-blown converter;

[0031] (4) Add slagging material and carry out blowing by lowering the lance. According to the difference in silicon content in the molten iron, the lance position in the blowing process needs to be adjusted specifically. The adjustment steps are as follows:

[0032] A. When the silicon content is 0.10%, the opening gun position is 0.8 meters, the process gun position is 1.1 meters, and the end gun position is 0.8 meters;

[0033] B. When the silicon content is 0.40%, the opening gun ...

Embodiment 2

[0039] (1) pour the amount of slag of 40wt% in furnace;

[0040] (2) Pass 83000t qualified molten iron into the heating furnace for heating, the heating temperature of the molten iron is 1340°C, and the heating time is 1.2h, and a carbonaceous heating agent is added into the furnace to increase the heat source;

[0041] (3) drop the molten iron after heating in the step (2) in the oxygen top-blown converter, at the same time, add 15300t qualified steel scrap in the oxygen top-blown converter;

[0042] (4) Add slagging material and carry out blowing by lowering the lance. According to the difference in silicon content in the molten iron, the lance position in the blowing process needs to be adjusted specifically. The adjustment steps are as follows:

[0043] A. When the silicon content is 0.10%, the opening gun position is 0.8 meters, the process gun position is 1.1 meters, and the end gun position is 0.8 meters;

[0044] B. When the silicon content is 0.40%, the opening gun p...

Embodiment 3

[0050] (1) pour the amount of slag of 40wt% in furnace;

[0051] (2) Pass 85,000t of qualified molten iron into the heating furnace for heating. The heating temperature of the molten iron is 1300°C, and the heating time is 1h, and a carbonaceous heating agent is added to the furnace to increase the heat source;

[0052] (3) drop the molten iron after heating in the step (2) in the oxygen top-blown converter, at the same time, add 15300t qualified steel scrap in the oxygen top-blown converter;

[0053] (4) Add slagging material and carry out blowing by lowering the lance. According to the difference in silicon content in the molten iron, the lance position in the blowing process needs to be adjusted specifically. The adjustment steps are as follows:

[0054] A. When the silicon content is 0.10%, the opening gun position is 0.8 meters, the process gun position is 1.1 meters, and the end gun position is 0.8 meters;

[0055] B. When the silicon content is 0.40%, the opening gun p...

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Abstract

The invention discloses a method for reducing iron consumption. The method specifically includes the following steps that 35-45 wt% of slag is poured into a furnace; qualified molten iron is introduced into the heating furnace for heating; the molten iron after heating in the above step is put into an oxygen top-blowing converter, and qualified steel scrap is added into the oxygen top-blowing converter at the same time; a slag-forming material is added for gun drop blowing, and the gun position in the blowing process needs to be specifically adjusted according to different silicon amounts in the molten iron. According to the method for reducing the iron consumption, by ensuring that the temperature of the molten iron is 1290 DEG C to 1320 DEG C, physical heat of the molten iron is stabilized, the heat balance of the converter is ensured, and correspondingly the consumption of the molten iron in a steel making process of the converter is reduced. By adding a carbonaceous heat-generatingagent into the converter, an important way of increasing the heat of the converter and increasing a cold-to-material ratio is achieved, the surplus heat is increased, the adding proportion of the steel scrap is increased, and thus the consumption of the molten iron is reduced; during gun drop blowing, the phenomena that the adding amount of the steel scrap is large and the steel scrap cannot be blown thoroughly are ensured, the operation is stable, and a better use prospect is brought.

Description

technical field [0001] The invention relates to an invention for reducing iron consumption, improves the traditional field of reducing iron consumption, and particularly relates to a method for reducing iron consumption. Background technique [0002] In the steelmaking workshop of the steelmaking plant, starting from optimizing basic management, strengthening process control, and strictly standardizing operations, etc., vigorously carry out research on reducing iron consumption in the steelmaking process. The efficiency is significantly increased. Making full use of the existing amount of molten iron to further increase steel production and continuously increase benefits is the focus of reducing iron consumption in the steelmaking workshop, and then technically transform the traditional method of reducing iron consumption; [0003] There are certain disadvantages in the existing method of reducing iron consumption. First, with the continuous increase of steel production, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/32C21C5/36C21C7/00
CPCC21C5/32C21C5/36C21C7/0025Y02P10/20
Inventor 王平安戴平康王小恩冯带兵贾宁波李东亮李海军党广亮刘伏红李如松
Owner LINZHOU FENGBAO PIPE
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