Rare-earth calcium-silicon-manganese deoxidizer and preparation method thereof

A technology of calcium silicon manganese deoxidizer and deoxidizer, which is applied in the field of deoxidizer, can solve problems such as not being able to be used normally in production, and easy pulverization of FMSA alloy, and achieve the effects of reducing the content of sundries, improving mechanical properties, and eliminating pores

Inactive Publication Date: 2018-12-18
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, FMSA alloy is easy to pulverize during stor

Method used

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preparation example Construction

[0027] The present invention also provides a preparation method of the rare earth calcium silicon manganese deoxidizer described above, the preparation method includes: calculating the amount of raw materials added according to the composition content described above; putting the prepared raw materials into a crucible to melt Refining, then pouring and cooling, and finally crushing and granulating.

[0028] In the above technical scheme, calcium source, silicon source, manganese source, Re source and iron source can be selected in a wide range, such as calcium source and silicon source are selected from silicon calcium alloy, manganese source and iron source are from manganese ferroalloy, Re source comes from Re alloy etc. Those skilled in the art can input the contents of the elements in the raw materials into the computer accordingly, and then calculate the addition amount of each raw material. This is a conventional technique for those skilled in the art, and will not be re...

preparation example 1

[0048] The preparation method of rare earth calcium silicon manganese deoxidizer, this preparation method comprises:

[0049] In terms of mass percentage, the deoxidizer contains Si: 32% to 35%, Ca: 16% to 18%, Mn: 10% to 12%, Re: 8% to 10%, P≦0.1%, S≦0.1 %, the total amount of unavoidable elements≦0.1%, the balance is Fe;

[0050] Calculate the addition of raw materials according to the aforementioned composition content: wherein, in terms of parts by mass, 60 parts of calcium-silicon alloy (Ca mass content 28-32%, Si mass content 60-65%) are weighed, ferromanganese (Mn content is not less than 65%) 18 parts, rhenium ingot: 11 parts, iron ingot: 11 parts;.

[0051] Methods include:

[0052] Put the prepared raw materials into a crucible and melt for 2.5 hours. The temperature of melting and refining is 1300°C. After melting, take a sample for inspection, and adjust the composition according to the target of the low content; then pour and cool, and finally break Granulating...

preparation example 2

[0055] The preparation method of rare earth calcium silicon manganese deoxidizer, this preparation method comprises:

[0056] In terms of mass percentage, the deoxidizer contains Si: 32% to 35%, Ca: 16% to 18%, Mn: 10% to 12%, Re: 8% to 10%, P≦0.1%, S≦0.1 %, the total amount of unavoidable elements≦0.1%, the balance is Fe;

[0057] Calculate the addition of raw materials according to the aforementioned composition content: wherein, in terms of parts by mass, 66 parts of calcium-silicon alloy (28-32% by mass content of Ca, 60-65% by mass content of Si) are weighed, ferromanganese (Mn content is not less than 65%) 21 parts, rhenium ingot: 13 parts, iron ingot: 10 parts.

[0058] Methods include:

[0059] Put the prepared raw materials into the crucible and melt and refine them for 2 hours. The temperature of melting and refining is 1320°C. Granules, the particle size of the deoxidizer obtained is 3-8mm.

[0060] After testing, in terms of mass percentage, the deoxidizer cont...

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Abstract

The invention discloses a rare-earth calcium-silicon-manganese deoxidizer and a preparation method thereof. The deoxidizing agent comprises the following components, by mass, 32-35% of Si, 16-18% of Ca, 10-12% of Mn, 8-10% of Re, less than or equal to 0.1% of P, less than or equal to 0.1% of S, less than or equal to 0.1 % of inevitable elements, and the balance Fe. According to the deoxidizer andthe method, the rare-earth calcium-silicon-manganese deoxidizer has the advantages of being extremely prone to react with oxygen at a high temperature and high in deoxidation efficiency; and meanwhile, crystal grains are modulated and fined, the defects of casting gas holes, needle holes and the like are avoided, and the mechanical property of the casting is improved.

Description

technical field [0001] The invention relates to a deoxidizer, in particular to a rare earth calcium silico manganese deoxidizer and a preparation method thereof. Background technique [0002] In order to remove C, S, P and other elements in molten iron, steel smelting sometimes needs to remove excess Si and Mn, and a large amount of oxygen needs to be blown into molten iron. When the end of blowing is reached, the existence of excess oxygen in steel will seriously affect the the quality of. Therefore, a deoxidizer must be added at the end of blowing to remove excess oxygen in the steel. The most widely used deoxidizer in modern smelting steel is silicon manganese alloy. During the deoxidation process of silicon-manganese alloys, about 5% to 15% of Mn is oxidized and enters the slag, and 85% to 95% enters the molten steel; about 20% of Si is oxidized and enters the slag, and 80% is absorbed by the molten steel. Some developed countries are committed to the development and ...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 柴知章杨皓月贾瑞方健张孝宇
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
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