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Converter smelting control method based on slag composition prediction

A control method and converter smelting technology, which is applied in the manufacture of converters, etc., can solve problems such as no solution, delayed calculation result prediction delay, and missing initial data.

Inactive Publication Date: 2019-12-10
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

At present, the method of on-line monitoring of furnace gas composition is commonly used, combining converter material balance and heat balance to calculate the slag composition. This method has the following problems: (1) The delay of the monitoring instrument will cause the delay of the calculation result forecast, and the calculation result will be lost. Real-time; (2) The lack of initial data will make the material balance and heat balance equations unsolvable, resulting in the inability to accurately predict the composition of the slag; (3) During the production process, the error of the monitoring instrument cannot be estimated, so the resulting calculation The resulting error cannot be eliminated

Method used

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  • Converter smelting control method based on slag composition prediction
  • Converter smelting control method based on slag composition prediction
  • Converter smelting control method based on slag composition prediction

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Embodiment 1

[0125] see figure 1 , figure 2 , a converter smelting control device based on slag composition prediction, including the following control modules: steel grade slag composition standard module: used to store slag composition standards corresponding to different steel grades; intermediate slag dumping steel grade distinction module: used to store different steel grades Whether it is necessary to carry out intermediate slag dumping in the smelting process; furnace state detection module: used to detect the furnace state of converter production; system scheduling module: used to call unused function modules according to the furnace state; process data collection module: use Used to collect production data in the production process; slag amount and composition calculation module: used to calculate the slag amount and composition of slag in real time; intermediate slag dumping control module: used to control the operation control of intermediate slag dumping; stop blowing end modu...

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Abstract

The invention relates to a converter smelting control method based on slag composition prediction. The control method includes the following steps that 1, establishment and maintenance of a steel typeslag composition standard are carried out; 2, establishment and maintenance of an intermediate deslagging steel type distinguishing are carried out; 3, a heat state detection module detects the heatproduction state; 4, slag quantity and composition calculation is carried out; 5, model calculation and corresponding control are carried out; 6, slag quantity and composition calculation is stopped;the step 3 is repeatedly executed; 7, intermediate deslagging control is carried out; 8, blowing operation is stopped; 9, a communication control module downloads control instructions to a PLC controlmodule; 10, the PLC control module performs corresponding operation control; the step 3 is repeatedly executed; and 11, operation is ended. By means of the technical scheme, related equipment does not need to be additionally arranged, and the real-time slag composition and weight are calculated by calculating the contents of various components contained in the molten steel slag quickly and accurately in real time.

Description

technical field [0001] The invention relates to a control method, in particular to a converter smelting control method based on slag component prediction, and belongs to the technical field of converter smelting control. Background technique [0002] In recent years, in order to obtain molten steel with lower phosphorus content and reduce the cost of raw materials at the same time, some steel mills at home and abroad have successively developed top-blown converter slag-double slag deep dephosphorization technology. The real-time calculation model of slag composition is applied to this process, and the timing and amount of slag dumping in the middle of the converter can be determined according to the real-time forecasted slag composition. At present, the method of on-line monitoring of furnace gas composition is commonly used, combining converter material balance and heat balance to calculate the slag composition. This method has the following problems: (1) The delay of the m...

Claims

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Application Information

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IPC IPC(8): C21C5/32C21C5/30
CPCC21C5/30C21C5/32
Inventor 王绪国
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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