Low-manganese low- sulfur raw material ferroferrite for amorphous usage and method of production

A raw material pure iron and production method technology, applied in the composition design and production of low-manganese and low-sulfur raw pure iron, the production of amorphous alloys and related materials, can solve problems such as low content and smelting process that cannot meet production requirements

Inactive Publication Date: 2007-09-26
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In practical applications, due to the advancement of new material smelting technology, the carbon increase in the smelting process has been greatly reduced, so some materials do not require a very low C content for raw material pure iron. For example, raw material pure iron for amorphous requires 0.025≤C≤0.07 %, while the content of the second type of elements Mn and S is low (Mn≤0.04%, S≤0.05%), and the content of the third type of elements Sn, Ti, etc. (Ti≤0.01%, Sn≤0.008%) is ultra-low. The converter process can control carbon, but due to the high requirements for elements such as Mn, S, Sn, Ti, etc., the current smelting process cannot meet the needs of production

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment produces amorphous low-S, low-Mn raw material pure iron of the present invention, and this embodiment includes the following process steps:

[0041] 1. Hot metal pretreatment

[0042] The molten iron is desulfurized by magnesium, and the composition of the molten iron in the furnace is: Si 0.40%, P 0.04%, S0.02%, Mn 0.3%.

[0043] 2. Converter blowing

[0044] ①All the charge into the furnace is molten iron, and the capacity of the converter is 90 tons.

[0045] ②Double slag operation is adopted, the first batch of slag is melted, 2 / 3 of the molten slag is poured out, and then slag is re-formed, and the final slag composition is CaO 42%, MgO 11%, SiO 2 10%, P 2 o 5 1.2%, MnO 1.5%, T Fe 20%.

[0046] ③The tapping temperature is 1630℃, and the final composition: C 0.035%, Si 0.001%, Mn 0.04%, S 0.012%, P 0.009%.

[0047] ④Double slag blocking operation is adopted for tapping, ferrosilicon and Al ingots are added during the tapping process, and th...

Embodiment 2

[0059] 1. Hot metal pretreatment

[0060] After the molten iron is desulfurized by magnesium, the composition of the furnace is: Si 0.55%, P 0.035%, S 0.01%, Mn 0.15%.

[0061] 2. Converter blowing

[0062] ① The capacity of the converter is 120 tons, and the furnace charge is 120 tons of molten iron and 5 tons of scrap steel. The main components of scrap steel are: P 0.04%, S 0.035%, and Mn 0.25%.

[0063] ②Three times of slagging, the first batch of slag is melted, pour out 1 / 2 of the slag, and then re-slag, after the second batch of slag is melted, pour out 1 / 2 of the slag, and make new slag, and finally Slag composition CaO45%, MgO9%, SiO 2 11.5%, P 2 o 5 1.3%, MnO 1.3%, T Fe 23.5%.

[0064] ③The tapping temperature is 1640℃, and the final composition: C 0.032%, Si<0.001%, Mn 0.035%, S 0.015%, P 0.01%.

[0065] ④Double slag blocking operation is adopted for tapping, ferrosilicon is added during the tapping process, aluminum wire is fed at the argon blowing statio...

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Abstract

The invention discloses a non-crystal low-manganese and low-sulfur pure ion and manufacturing method, which comprises the following parts: 0.03-0.07% C, 0.10-2.0% Si, 0.03-0.06% Mn, not more than 0.02% P, not more than 0.005% S, not more than 0.02% Al, not more than 0.008% Sn and not more than 0.01% Ti. The manufacturing procedure comprises the following steps: adopting melted iron to predispose; reducing S content in the melted iron; blowing in the rotary furnace; removing carbon and manganese through double-slag method or multiple slaggings; proceeding LF refining; casting in the square blank; using FeSi, Al or individual Al to predeoxidize; blowing and stirring in the whole procedure; dispersing through ferrosilicium and rankinite to deoxidize and desulfurize deeply; reducing Al; heating; feeding calcium line after stirring; casting; obtaining iron blank.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to a composition design and production method of low-manganese and low-sulfur raw material pure iron, and is especially suitable for the production of amorphous alloys and related materials. Background technique [0002] Raw pure iron is the basic raw material for the development of new iron and steel materials. With the increase in the variety and output of new materials in recent years, the research and development and application of raw pure iron have also received increasing attention. According to the provisions of the national standard (GB9971-88), the main uses and chemical compositions of raw material pure iron are shown in Table 1. The composition of raw material pure iron varies greatly due to different application conditions. Therefore, major domestic production enterprises have established their own corresponding As reported in the paper "The Present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C45/00
Inventor 张慧张兴中颜慧成姬秀琴仇圣桃彭世恒刘和平蒋伯群
Owner CENT IRON & STEEL RES INST
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