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

A metal raw material and weak magnetic technology, which is used in the field of melting high-aluminum weak magnetic metal raw materials in an intermediate frequency induction furnace, which can solve the problems of difficult melting, shortened furnace lining life, and damaged furnace lining.

Inactive Publication Date: 2008-05-14
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • 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

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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 feed electricity for melting. When the metal material in the intermediate frequency induction furnace is completely melted by visual inspection, the measured temperature reaches 1533°C, and then add Calcium-silicon alloy (Ca31Si60) 3.4kg, after the calcium-silicon alloy is added, a strong oxidation reaction occurs instantaneously on the upper part of the metal liquid surface, after the calcium-silicon alloy is added and kept for 22 minutes, the non-magnetic 20Mn23AlV molten steel comes out of the furnace.

[0047] In this embodiment, after tapping, no slag sticking phenomenon was found at the molten metal surface of the furnace lining, and the original state 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] Put 8 tons of non-magnetic high manganese aluminum 45Mn17Al13 mixed steel scrap raw materials into the medium frequency induction furnace and send electricity for melting. When all the raw materials in the medium frequency induction furnace are melted visually, the measured temperature reaches 1530°C, and then silicon is added to the top of the metal liquid surface. Calcium alloy (Ca31Si60) 4.3kg. After adding silicon-calcium alloy, a strong oxidation reaction occurs instantaneously on the upper part of the metal liquid surface. After adding silicon-calcium alloy (Ca31Si60) and keeping it for 20 minutes, the non-magnetic 45Mn17Al13 molten steel comes out of the furnace.

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

Embodiment 3

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

[0054] Put 6 tons of manganese-aluminum alloy (FeAl22Mn32) into the medium-frequency induction furnace and send electricity to melt it. When the metal raw materials in the medium-frequency induction furnace are completely melted and the measured temperature reaches 1540°C, then add silicon-calcium alloy on the top of the metal liquid surface. (Ca31Si60) 6.2kg, after the calcium-silicon alloy is added, a strong oxidation reaction occurs instantaneously on the upper part of the metal liquid surface. After the calcium-silicon alloy is added and kept for 28 minutes, the manganese-aluminum alloy molten steel comes out of the furnace.

[0055] Due to operational errors, in this embodiment, after tapping, there is basically no slag sticking phenomenon at the metal liquid surface of the furnace lining, and the slag sticking phenomenon is far less than that before this method is n...

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Abstract

The invention relates to a method for melting high-aluminum weak-magnetic metal material by employing medium frequency induction furnace. The method is that: during continuously melting high-aluminum weak-magnetic metal material adopting medium frequency induction furnace, when the high-aluminum weak-magnetic metal material inside the furnace is completely melted into liquid steel and the temperature reaches to 1530 to 1540 DEG C, the liquid is added with calcium silicon (Ca31Si60), the weight of which for each furnace should be Q=T multiplied by(M-G)multiplied by 1000 multiplied by 0.617, wherein, the M is content of the high-aluminum weak-magnetic metal material Al; the G is the average value of aluminum, which is obtained through sampling analysis of the same high-aluminum weak-magnetic metal material before out of the furnace during the early stage of melting, T is the weight of the melted high-aluminum weak-magnetic metal material. The method of the invention is easy and simple to handle and can effectively prolong the lining service life of the medium frequency induction furnace in the process of melting high-aluminum magnetic free material.

Description

technical field [0001] The invention relates to a method for melting high-aluminum weak-magnetic metal raw materials in a medium-frequency induction furnace. Background technique [0002] When the intermediate frequency induction furnace melts high-alumina weak magnetic metal raw materials, different parts have different melting capabilities. Area. 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 a...

Claims

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Application Information

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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
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