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Method for producing iron-silicon alloy powder by using waste silicon steel

A technology of iron-silicon alloy and waste silicon steel is applied in the field of metal soft magnetic material preparation, which can solve the problem of high cost, and achieve the effects of reducing the cost of addition, uniform composition, and improving oxidation resistance and corrosion resistance.

Pending Publication Date: 2019-11-08
宝武环科武汉金属资源有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the point of view of raw materials, at present, the iron-silicon alloy powder produced by atomization is mostly industrial silicon (more than 99.5% silicon content) and industrial pure iron (more than 99.6% iron content), the cost is relatively high, and other alloying elements such as chromium, For nickel, it is necessary to purchase pure metal and add it during smelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for producing iron-silicon alloy powder by utilizing waste silicon steel, which uses silicon steel scrap coil, industrial silicon and pure iron as raw materials, in terms of mass percentages, respectively: silicon steel scrap coil 70-75%, industrial silicon 3-4% , pure iron 23-27%; the composition of the iron-silicon alloy melt obtained after smelting the three raw materials contains 5.5% Si, 0.25% Mn, 0.15% Cr, and the content of the remaining trace elements is less than 0.1% and the total The content is not more than 0.5%, and the balance is iron; among them, the silicon steel scrap coil contains 3.5% silicon, 0.22% chromium, 0.4% manganese, and the content of the remaining trace elements is less than 0.1% respectively and the total content is not more than 0.5%.

[0031] The specific production process includes the following steps:

[0032] 1. Evacuate the intermediate frequency melting furnace, the vacuum degree is 8Pa, fill with nitrogen to 0.09MPa, and ma...

Embodiment 2

[0041] A method for producing iron-silicon alloy powder by using waste silicon steel, which uses silicon steel waste cutting head, industrial silicon and pure iron as raw materials, in terms of mass percentages, respectively: silicon steel waste cutting head 78-80%, industrial silicon 3.7-3.8% , pure iron 16-18%; the composition of the iron-silicon alloy melt obtained after smelting the three raw materials contains 6.5% Si, 0.22% Mn, 0.12% Cr, and the content of the remaining trace elements is less than 0.1% and the total The content is not more than 0.4%, and the balance is iron; among them, the silicon steel waste cutting head contains 4.5% silicon, 0.2% chromium, 0.35% manganese, and the content of the remaining trace elements is less than 0.1% respectively and the total content is not more than 0.5%.

[0042] The specific production process includes the following steps:

[0043] 1. Evacuate the intermediate frequency melting furnace, the vacuum degree is 10Pa, fill with ni...

Embodiment 3

[0049] A method for producing iron-silicon alloy powder by utilizing waste silicon steel, which uses silicon steel waste cutting head, industrial silicon and pure iron as raw materials, and in terms of mass percentages, the following are: silicon steel waste cutting head 90-95%, industrial silicon 3.9-4.1% , pure iron 1.1-5.9%; the composition of the iron-silicon alloy melt obtained after smelting the three raw materials contains 7.2% Si, 0.2% Mn, 0.12% Cr, and the content of the remaining trace elements is less than 0.1% and the total The content is not more than 0.5%, and the balance is iron; among them, the silicon steel scrap contains 5.5% silicon, 0.22% chromium, 0.5% manganese, and the content of the remaining trace elements is less than 0.1% respectively, and the total content is not more than 0.5%.

[0050] The specific production process includes the following steps:

[0051] 1. Evacuate the intermediate frequency melting furnace, the vacuum degree is 12Pa, fill with ...

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Abstract

The invention discloses a method for producing iron-silicon alloy powder through gas atomization by taking waste silicon steel as raw materials. The method comprises the following steps that (1) smelting is carried out to form an iron-silicon alloy melt by taking the waste silicon steel, industrial silicon and pure iron as the raw materials; and (2) the melt is poured into a tundish and enters a gas atomization chamber through a flow guide pipe at the bottom to be atomized into liquid drops, and the liquid drops are cooled so as to prepare the iron-silicon powder. The method has the innovativeness that the waste silicon steel is adopted to replace or partially replace the pure iron and the industrial silicon, so that the cost of powder preparation through gas atomization can be remarkablylowered, it is guaranteed that the product composition is accurate, meanwhile, chromium and manganese elements in the waste silicon steel can improve the oxidation resistance and the corrosion resistance of the powder, and the practical performance of the powder is improved while the magnetic property of the powder is not reduced.

Description

technical field [0001] The invention belongs to the field of metal soft magnetic material preparation, and particularly relates to a method for producing iron-silicon alloy powder by utilizing waste silicon steel. Background technique [0002] Soft magnetic materials are a class of materials with low coercivity and high permeability, mainly including metal soft magnetic and ferrite soft magnetic. Traditional soft magnetic metals such as silicon steel have high saturation magnetic induction and permeability, but due to the limitation of silicon content, the resistivity is low, and the eddy current loss is large at high frequencies, so they cannot be used in high-frequency electronic devices; Soft ferrite has the advantage of low high-frequency loss and can be used in small electronic devices, but it is not suitable for high-current devices due to its low saturation magnetic induction and permeability. [0003] The methods for preparing iron-silicon alloy powder include mecha...

Claims

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Application Information

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IPC IPC(8): B22F9/08C22C38/02C22C38/04C22C38/18
CPCB22F9/082C22C38/02C22C38/04C22C38/18
Inventor 焦立新杨培杨玉肖一坦朱盼星倪俊徐政王振传汪杰
Owner 宝武环科武汉金属资源有限责任公司