Method for melting high-alumina weakly magnetic metal material by medium frequency induction furnace

A metal raw material and weak magnetic technology, which is applied in the field of melting high-alumina weak magnetic metal raw materials in medium frequency induction furnaces, can solve the problems of shortened furnace lining life, difficult melting, damaged furnace lining, etc., and achieves improved furnace lining life, low cost, and less investment Effect

Inactive Publication Date: 2009-07-29
SHANXI TAIGANG STAINLESS STEEL CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the intermediate frequency induction furnace continuously melts the weak magnetic metal raw material with high aluminum content, it is difficult to melt. At the same time, due to the continuous oxidation of Al element during the melting process, a large amount of Al is formed. 2 o 3 Inclusions, Al in the high temperature region 2 o 3 Basically, it can be melted into the molten pool, and in the low temperature area of ​​the furnace mouth, due to Al 2 o 3 The melting point is high, and it is continuously precipitated and adhered to the wall of the intermediate frequency induction furnace. If one furnace after another is continuously melted, the inner diameter of the furnace wall will gradually become smaller, and at the same time, due to Al 2 o 3 The melting point is high, the material is hard, it is difficult to remove by mechanical means, and the furnace lining may be damaged. In the end, because the furnace mouth becomes smaller, the furnace is forced to stop and replace the furnace lining, which shortens the life of the furnace lining

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
  • Method for melting high-alumina weakly magnetic metal material by medium frequency induction furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The nominal capacity of the intermediate frequency induction furnace of this embodiment is 8 tons.

[0046] Add 7.2 tons of non-magnetic high-manganese-aluminum 20Mn23AlV mixed steel scrap raw materials into an intermediate frequency induction furnace and send electricity for melting. When the metal materials in the intermediate frequency induction furnace are all melted, the temperature is measured to reach 1533℃, and then added to the upper part of the molten metal Silicon-calcium alloy (Ca31Si60) 3.4kg, after the silicon-calcium alloy is added, a strong oxidation reaction occurs on the upper part of the metal liquid instantaneously. After the silicon-calcium alloy is added for 22 minutes, non-magnetic 20Mn23AlV molten steel is released.

[0047] In this embodiment, after tapping, no slag sticking phenomenon was found in the molten metal surface of the furnace lining, and the original shape of the furnace lining was maintained.

Embodiment 2

[0049] The nominal capacity of the intermediate frequency induction furnace of this embodiment is 8 tons.

[0050] Add 8 tons of non-magnetic high-manganese aluminum 45Mn17Al13 mixed scrap raw materials into the intermediate frequency induction furnace to send electricity for melting. When the raw materials in the intermediate frequency induction furnace are all melted, the temperature is measured to 1530℃, and then silicon is added to the upper part of the molten metal. Calcium alloy (Ca31Si60) 4.3kg. After silicon calcium alloy is added, a strong oxidation reaction occurs on the upper part of the metal liquid instantaneously. After adding calcium silicon alloy (Ca31Si60) for 20 minutes, non-magnetic 45Mn17Al13 molten steel is released.

[0051] In this embodiment, after tapping, no slag sticking phenomenon was found at the molten metal surface of the furnace lining, and the furnace lining was kept in its original shape.

Embodiment 3

[0053] The nominal capacity of the intermediate frequency induction furnace of this embodiment is 8 tons.

[0054] Add 6 tons of manganese-aluminum alloy (FeAl22Mn32) into the intermediate frequency induction furnace and send electricity to melt. When the metal raw materials in the intermediate frequency induction furnace are all melted, the measured temperature reaches 1540℃, and then the silicon-calcium alloy is added to the upper part of the molten metal. (Ca31Si60) 6.2kg, after the silicon-calcium alloy is added, a strong oxidation reaction occurs on the upper part of the metal liquid instantaneously. After the silicon-calcium alloy is added for 28 minutes, the manganese aluminum alloy molten steel is released.

[0055] Due to operational errors, in this embodiment, after the steel is tapped, basically no slag sticking phenomenon is found at the molten metal surface of the furnace lining. The slag sticking phenomenon is much less than before using this method, and the furnace ...

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 method for melting high-aluminum weak magnetic metal raw materials in an intermediate frequency induction furnace. When the intermediate frequency induction furnace continuously melts high aluminum weak magnetic metal raw materials, after all the high aluminum weak magnetic metal raw materials in the furnace are melted into liquid molten steel, When the temperature reaches 1530°C-1540°C, add silicon-calcium alloy (Ca31Si60) to the liquid surface, and the weight Q of silicon-calcium alloy added to each furnace is: Q=T×(M-G)×1000×0.617, where M is a certain furnace The content of the Al element in the melted high-aluminum weak magnetic metal raw material, G is the average value of the aluminum content obtained by melting the same high-aluminum weak magnetic metal raw material in the previous furnace through sampling analysis before being released from the furnace, and T is the aluminum content melted by the furnace The weight of this kind of high aluminum weak magnetic metal raw material. The method for melting high-aluminum and weak-magnetic metal raw materials in the medium-frequency induction furnace of the invention is easy to operate, and can significantly improve the service life of the furnace lining of the medium-frequency induction furnace when melting high-aluminum and weakly magnetic raw materials.

Description

Technical field [0001] The invention relates to a method for melting high-aluminum weak magnetic metal raw materials in an intermediate frequency induction furnace. Background technique [0002] When the medium frequency induction furnace is melting high-aluminum weak-magnetic metal raw materials, the melting capacity of different parts is different. At the furnace mouth, on the one hand, because the molten steel surface is in contact with the atmosphere, on the other hand, the heating capacity of the coil is weakened, resulting in a low temperature at the furnace mouth. Area. Therefore, when the intermediate frequency induction furnace continuously melts the weak magnetic metal raw materials with high aluminum content, it is more difficult to melt. At the same time, due to the continuous oxidation of the Al element during the melting process, a large amount of Al is formed. 2 O 3 Inclusions, Al in the high temperature zone 2 O 3 Basically it can be melted into the molten pool, a...

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 Patents(China)
IPC IPC(8): C22C33/04C21C7/04
Inventor 杨利忠郝旭明韩杰宇田仪
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap