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Production process method for converter steelmaking

A converter steelmaking and production process technology, applied in the manufacture of converters, etc., can solve problems such as carbon-oxygen reaction instability, splashing, and back-drying, and achieve the goals of improving steelmaking efficiency, preventing splashing, and saving production costs Effect

Inactive Publication Date: 2017-11-24
山西新泰钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention mainly aims at the instability of the carbon-oxygen reaction in the furnace and the resulting splashing and back-drying problems in the process of converter steelmaking, and provides a converter steelmaking method based on the principle of determining the real-time change of carbon content in the converter by using the furnace gas composition. production process

Method used

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  • Production process method for converter steelmaking
  • Production process method for converter steelmaking
  • Production process method for converter steelmaking

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Effect test

Embodiment 1

[0012] A production process method for converter steelmaking, comprising a dynamic converter steelmaking system and a data communication system, wherein: a gas analyzer is also included, and the gas analyzer is connected to the converter flue in the dynamic converter steelmaking system through pipelines It is used to collect the flue gas in the converter flue and analyze the content of carbon monoxide in the flue gas, and transmit it to the furnace front operation platform of the dynamic converter steelmaking system through the data communication system, and then use the dynamic converter steelmaking system to draw the trend of CO in the furnace in real time According to the graph, the material in the converter steelmaking is adjusted according to the trend chart of CO according to the conventional method. A converter smelting cycle is divided into three stages. The normal trend chart of CO is a smooth curve. Except for a part of the CO-containing gas generated during the blowi...

Embodiment 2

[0014] Slag overflow in the early stage of converter smelting:

[0015] In the actual production process, at the initial stage of smelting, as elements such as Si, Mn, P, and Fe in molten iron begin to oxidize, C is also oxidized synchronously, and as the temperature continues to increase, the CO content also increases. 3min, the first batch of slag added and the oxidized elements also began to react continuously to form the first batch of slag. The shape and composition of the system are also reflected in the CO curve, that is, the CO value begins to decrease after reaching a small peak, see figure 1 . This phenomenon is due to the change of the slag slag system, and more gas is trapped in the slag, which makes it unable to be discharged out of the furnace in time. As more and more gas is hindered from being discharged, the foamy slag formed gradually increases until it overflows, and the slag foam appears. In the early stage of smelting, it is necessary to add slag materia...

Embodiment 3

[0017] Mid splatter:

[0018] The change of CO in the furnace gas when the slag is splashed is shown in image 3 . In the middle stage of smelting, if the trend chart of CO shows a significant drop, it means that splashing will occur. The middle stage of smelting is the intense reaction period of C and O. Normally, the CO content will be stable at a high value area in the middle stage of smelting. If the slag is foamed at this stage , it will cause a large amount of gas to stagnate in the slag, the gas content in the CO trend chart will drop obviously, the slag will also expand rapidly, and splashing will occur in a short time. If this phenomenon occurs, it is necessary to add slag first to break the foamy slag At the same time, the position of the gun can be changed. The position of the gun can be interchanged between high and low, and the slag system can also be adjusted to a low position.

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Abstract

The invention belongs to the field of production processes for converter steelmaking, relates to a production process method for converter steelmaking, and mainly solves the problems of instability of carbon-oxygen reaction in a converter, and caused splashing, drying and the like in a converter steelmaking process. In the production process method for converter steelmaking, a dynamic converter steelmaking system, a data communication system and a coal gas analyzer are used, wherein the coal gas analyzer is connected with a converter flue in the dynamic converter steelmaking system through a pipe, and is used for collecting smoke in the converter flue and analyzing the content of carbon monoxide in the smoke; data are transmitted to a converter front operation platform of the dynamic converter steelmaking system through the data communication system; the trend chart of CO in the converter is drawn in real time by the dynamic converter steelmaking system; and materials in converter steelmaking are adjusted by the conventional method according to the trend chart of CO.

Description

technical field [0001] The invention belongs to the field of converter steelmaking production technology, and relates to a production technology method of converter steelmaking Background technique [0002] In recent years, people's requirements for steel quality have been continuously improved, and converter steelmaking is a very complicated process. It is difficult to achieve the required control accuracy by manual experience control and traditional static model. At present, some large enterprises in Japan, Europe and the United States have successfully implemented the full-range dynamic control of the converter on the basis of static models, supplemented by technologies such as auxiliary guns, furnace gas analysis, optical probes, and slag on-line detection. Among them, the dynamic control technology of furnace gas analysis has the fastest development and the best effect. However, only some large iron and steel enterprises in China have installed the converter gas analys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/30
CPCC21C5/30
Inventor 梁三清
Owner 山西新泰钢铁有限公司
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