Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Judgment method and judgment system for smelting stage of electric arc furnace

An electric arc furnace smelting and stage technology, which is applied in the field of electric arc furnace smelting stage determination methods and systems, can solve the problems of large reactive power loss, increased power grid impact, increased arc current and arc voltage fluctuations, etc. Effect

Inactive Publication Date: 2015-04-22
NORTHEASTERN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different stages of electric arc furnace steelmaking have different control characteristics. However, the existing technology cannot automatically determine the melting stage of the electric arc furnace. If all stages follow the same control strategy, the fluctuation range of arc current and arc voltage will increase, and the noise during melting A series of problems such as large impact on the power grid and large reactive power loss

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Judgment method and judgment system for smelting stage of electric arc furnace
  • Judgment method and judgment system for smelting stage of electric arc furnace
  • Judgment method and judgment system for smelting stage of electric arc furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

[0036] figure 1 A schematic flowchart of the method for determining the smelting stage of the electric arc furnace provided by the first embodiment of the present invention is shown, such as figure 1 As shown, the method of this embodiment is as follows.

[0037] 101. According to the historical arc voltage data or arc current data of the electric arc furnace smelting stage, establish a principal component analysis model of the historical data, and calculate the confidence interval boundary of the electric arc furnace smelting stage.

[0038] In this step, it should be noted that the electric arc furnace smelting stage includes: an arc starting stage, a well penetration stage, a rising stage ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a judgment method and a judgment system for a smelting stage of an electric arc furnace. The method comprises the following steps: establishing a historical data principal component analytical model according to historical electric arc voltage data or electric arc current data in the smelting stage of the electric arc furnace; calculating a confidence interval boundary of the smelting stage of the electric arc furnace; gathering the electric arc voltage data or the electric arc current data for smelting of the existing electric arc furnace in real time; calculating a predicted sum of squared errors in the smelting stage of the existing electric arc furnace according to the historical data principal component analytical model; and calculating the difference value between the predicted sum of squared errors and the confidence interval boundary in the smelting stage of the existing electric arc furnace, wherein the smelting stage of the electric arc furnace corresponding to the minimum positive value of the difference value is judged as the smelting stage of the existing electric arc furnace. The method can be used for automatically judging the smelting stage of the electric arc furnace so as to control the electrode of the electric arc furnace well.

Description

Technical field: [0001] The invention relates to the field of determination of the smelting stage of an electric arc furnace, in particular to a method and a system for judging the smelting stage of an electric arc furnace. Background technique: [0002] Electric arc furnace steelmaking is an electric heating equipment that inputs electrical energy into the electric arc steelmaking furnace through graphite electrodes, and uses the arc generated between the electrode end and the charge as a heat source for steelmaking. In the electric arc furnace steelmaking process, the melting period is from the start of electrification to the melting of the charge. After energization, the electrode and the solid charge start arcing to melt the charge, and the electrode gradually descends until the electrode and the molten steel at the bottom of the furnace directly start the arc. Then the electrode begins to rise slowly as the liquid level rises, until the charge is completely melted. Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/52
CPCY02P10/20
Inventor 陈晓波杨英华秦树凯
Owner NORTHEASTERN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com