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Method and system for dynamic regulation and control of nodulizing inoculation processing of nodular cast iron

An inoculation treatment and control system technology, which is applied in the field of metallurgy and casting, can solve the problem that the spheroidization inoculant treatment agent cannot be accurately quantified, and achieve the effects of avoiding a lot of waste, improving comprehensive quality, and realizing closed-loop control

Active Publication Date: 2016-07-20
河北京东管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a dynamic control method and system for spheroidizing inoculation treatment of nodular cast iron. By establishing a comprehensive quality evaluation model for the metallurgical state of the original molten iron, it can solve the problem that the spheroidizing inoculation treatment agent cannot be accurately quantified due to fluctuations in the metallurgical state of the original molten iron.

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  • Method and system for dynamic regulation and control of nodulizing inoculation processing of nodular cast iron
  • Method and system for dynamic regulation and control of nodulizing inoculation processing of nodular cast iron
  • Method and system for dynamic regulation and control of nodulizing inoculation processing of nodular cast iron

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Embodiment 1

[0019] A calculation model for the addition of nodulizers based on the comprehensive evaluation of the metallurgical state of the original molten iron was established. The gray correlation model or improved gray correlation model or joint gray correlation model is used to comprehensively evaluate the metallurgical state characteristics such as the basic chemical composition of the original molten iron, graphite nucleation ability, oxidation degree and S content. The evaluation system is based on the characteristic parameters on the thermal analysis curve It is composed of the results of rapid spectral composition analysis in front of the furnace, and reflects the influence of the original molten iron on the inoculation effect of nodularization. Before the evaluation, first determine the threshold value of each metallurgical state parameter under production conditions, and use the median sequence of each parameter threshold value to form the statistical optimal reference state. ...

Embodiment 2

[0023] Evaluation and secondary regulation of spheroidization inoculation effect. In order to realize the closed-loop control of the spheroidization inoculation treatment process, the present invention also designs the links of quick detection of spheroidization inoculation effect and secondary addition of spheroidization inoculation treatment agent. The thermal analysis-eutectic expansion dual-parameter joint evaluation method is used for the furnace detection of the spheroidization effect (see ZL201510562418.6 for the device and detection method), and the dual-parameter spheroidization rate D S The regression formula is D S =-40.487-1.101( T L - T EU )-0.076 T EU -0.919 R +39.558 ε +0.101 t Grexp , where T L is the initial crystal temperature, T EU is the lowest eutectic temperature, R is the eutectic rise temperature, ε is the graphite eutectic expansion rate, t Grexp is the graphite eutectic expansion time. ( T L - T EU ), T EU and R To charac...

Embodiment 3

[0027] Construction of a dynamic regulation system for spheroidization inoculation. The system is mainly divided into a test and evaluation unit and a control unit, including the overall executive mechanism for the implementation of molten iron smelting, quality inspection, special function realization and auxiliary equipment. Each subsystem is composed of hardware and software (or software solidification module). They are respectively connected with the input and output channels of the host computer, and are controlled by their instructions to complete corresponding operations. The relationship between each hardware unit is as follows image 3 As shown, under the control of the computer system management software, the functions of detection and evaluation of various metallurgical quality status items, molten iron weighing, spheroidizing inoculant feeding line supplementation, and furnace temperature adjustment can be realized. Among them, the original hot metal and spheroid...

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Abstract

The invention discloses a method and system for the dynamic regulation and control of the nodulizing inoculation processing of a nodular cast iron, and the method and system are used for carrying out technological optimization control and regulation of the dynamic nodulizing inoculation processing in a casting production process of the nodular cast iron based on the actual metallurgy state of base iron. The method comprises the steps: selecting an effective characteristic parameter for representing the metallurgy state of base iron, and building an integrated evaluation model for the determining of a qualified metallurgy state in an actual production process and the precise calculation of an additive amount of a nodulizing agent. There is a corresponding nodulizing and inoculation effect measurement and evaluation and regulation and control method at the nodulizing and inoculation processing and final pouring links, thereby achieving the closed loop control of a production process. The system mainly comprises (1), a subsystem for regulating and controlling the metallurgy state of base iron; (2), a nodulizing processing and effect regulation and control subsystem; (3), an inoculation processing and effect regulation and control subsystem; (4), a molten iron nodulizing inoculation final fine-tuning subsystem. The method and system also can be used for the online dynamic adjustment and control of the vermicularizing treatment of the nodular cast iron.

Description

technical field [0001] The present invention belongs to the inventions and creations in the fields of metallurgy and casting, and specifically proposes a dynamic control method and system for spheroidizing inoculation treatment of nodular cast iron. Background technique [0002] The smelting of raw molten iron, spheroidizing treatment and inoculation treatment are three key links in the manufacturing process of ductile iron. The spheroidizing inoculation effect of molten iron ultimately determines the shape of graphite precipitation, the eutectic solidification characteristics and the quality of solidified castings. At present, most foundries adopt the excessive spheroidization method according to actual production conditions to ensure the spheroidization effect of graphite in castings. However, if the spheroidization and inoculation treatment are not carried out according to the actual metallurgical state of the original molten iron, the problem is not only the increase in...

Claims

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Application Information

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IPC IPC(8): G05B19/042G05B11/42C21C1/10C22C33/08
CPCC21C1/10C22C33/08G05B11/42G05B19/042
Inventor 李大勇徐振宇马旭梁王利华王言峰
Owner 河北京东管业有限公司
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