Deoxidizing alloying agent capable of purifying molten steel and preparation method thereof

A deoxidizing alloying and deoxidizing technology, applied in the field of iron and steel smelting, can solve the problems of difficult to ensure alloy homogeneity, no segregation at the end of difficult solidification, time waste, etc. Fully even effect

Active Publication Date: 2019-04-30
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are several deficiencies in the alloy produced by this method: 1) the alloy produced by this method is difficult to ensure that the alloy is homogeneous. Segregation phenomenon; 2) After the deoxidation by this method, other alloying elements still need to be added, such as manganese, niobium, vanadium, etc. for alloying, and there is a time-wasting problem

Method used

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  • Deoxidizing alloying agent capable of purifying molten steel and preparation method thereof
  • Deoxidizing alloying agent capable of purifying molten steel and preparation method thereof
  • Deoxidizing alloying agent capable of purifying molten steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Deoxidation alloying agent preparation:

[0027] (1) The weight percent of the deoxidizing alloying agent is 35% for aluminum, 6% for silicon carbide, 6% for calcium aluminate, 14% for silicon, 27% for manganese, and the rest is iron.

[0028] (2) Metal aluminum, silicon carbide fine powder, calcium aluminate fine powder, metal silicon, metal manganese, and industrial pure iron are used as raw materials for the deoxidation alloying agent. The purity of metal raw materials reaches 99.1%, and the content of phosphorus and sulfur is 0.04%. The silicon carbide fine powder and calcium aluminate fine powder have a purity of 99.2%, and the particle diameters of the silicon carbide fine powder and calcium aluminate fine powder are 100-300 microns.

[0029] (3) Melt metal aluminum and industrial pure iron in the crucible of the induction furnace according to the finished product content, then add metal silicon and metal manganese according to the finished product content, and a...

Embodiment 2

[0040] Deoxidation alloying agent preparation:

[0041] (1) The weight percent of the deoxidizing alloying agent is that the aluminum content is 36%, the silicon carbide content is 3%, the calcium aluminate content is 5%, the silicon content is 3.2%, the manganese content is 30%, and the titanium content is 0.36%, The niobium content is 0.62%, the rest is iron.

[0042](2) Metal aluminum, silicon carbide fine powder, calcium aluminate fine powder, metal silicon, metal manganese, metal titanium, metal niobium and industrial pure iron are used as raw materials for the production of deoxidation alloying agent. The purity of metal raw materials reaches 99.2%, and the content of phosphorus and sulfur is 0.03%. The purity of the silicon carbide fine powder and calcium aluminate fine powder reaches 99.1%, and the particle size of the silicon carbide fine powder and calcium aluminate fine powder is 300-500 microns.

[0043] (3) In the crucible of the induction furnace, metal aluminu...

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Abstract

The invention provides a deoxidizing alloying agent capable of purifying molten steel and a preparation method thereof. The components of the deoxidizing alloying agent include, by weight percentage,30-50% of aluminum, 2-6% of silicon carbide, 2-6% of calcium aluminate, and 5-45% of one or more of niobium, vanadium, titanium, manganese, nickel, chromium, copper, molybdenum and silicon; and particle sizes are 5-50 mm. During preparation, metal aluminum and industrial pure iron can be melted in an induction furnace crucible according to the finished product content; the metal niobium, vanadium,titanium, manganese, nickel, chromium, copper, molybdenum and silicon can be added; spiral electromagnetic stirring can be simultaneously applied, the current of the spiral electromagnetic stirring is 150-250 A, and the frequency is 2.5-4 Hz; the silicon carbide and calcium aluminate fine powder can be added after the added metal is completely melted; the power supply of the induction furnace canbe stopped after 5-10 min of stirring; the spiral electromagnetic stirring can be continued until alloy is solidified; and a crusher can be utilized to crush alloy ingots into small pieces with a particle size of 5-50 mm, and packaging can be performed for later use. The full uniformization of the alloy and the silicon carbide and calcium aluminate fine powder can be guaranteed by adopting a spiral electromagnetic stirring technology; the full purifying molten steel of the calcium aluminate can be guaranteed; and deoxidizing alloying time can be saved.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a composite deoxidation alloying agent produced by a spiral stirring method and a preparation method thereof. Background technique [0002] In the process of steelmaking, deoxidizers, such as aluminum, calcium, titanium, etc., are usually added to molten steel first, and then alloying agents, such as manganese, niobium, vanadium, titanium, etc., are added according to the steel composition requirements. This method can lead to prolonging the steelmaking time. Usually, it takes a few minutes to add the alloying agent after adding the deoxidizer. It is impossible for inner alumina inclusions to completely float up to the surface of molten steel and be absorbed by slag. Alumina brings great harm to casting and steel quality. In order to avoid the harm that aluminum oxide brings, some patents adopt aluminum-free or little aluminum deoxidizer, as patent, a kind of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/064C22C35/00
CPCC21C7/0006C21C7/06C21C7/0645C22C35/00
Inventor 唐复平尚德礼廖相巍吕春风黄玉平常桂华赵亮康伟万雪峰张维维于赋志
Owner ANGANG STEEL CO LTD
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