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Composite deoxidizing agent aluminum-calcium-iron alloy for smelting steel

A composite deoxidizer and ferroalloy technology, which is applied in the field of aluminum-calcium-ferroalloy, can solve the problems that cannot be used directly and are easy to burn

Inactive Publication Date: 2007-12-12
谢应凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But due to its light specific gravity (1.54g / cm 3 ), flammable (melting point 850°C), cannot be used directly in steelmaking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Composite deoxidizer design composition (weight %): Al40, Ca10, Fe are balance and unavoidable impurity. Ingredients: metal aluminum 200kg, metal calcium 50kg, clean steel scrap 250kg. Throw it into an induction furnace with a volume of 1 ton (steelmaking capacity) to melt and synthesize it. Its product ingredients:

[0011] the element

[0012] The total weight of the composite deoxidizer is 490kg, the fire consumption is 2%, and the specific gravity is 5.21g / cm 3 , Melting point 1200°C.

Embodiment 2

[0014] In order to increase the effective components of the composite deoxidizer and increase the specific gravity, ferromanganese is used to replace steel scrap. Design composition (weight %): Al50, Ca3, Mn35, Fe are balance and unavoidable. Melting in embodiment 1 induction furnace. Its ingredients: 250kg of metal aluminum, 15kg of metal calcium, 235kg of ferromanganese alloy (FeMn78), made into alloy composition:

[0015] the element

[0016] weight%

[0017] The weight of the alloy is 486kg, the fire consumption is 3%, and the specific gravity is 5.35g / cm 3 , Melting point 1030°C.

Embodiment 3

[0019] When silicon-containing steel is used, in order to reduce the cost of the composite deoxidizer, calcium-silicon alloy is used instead of calcium metal to increase the content of double-soluble aluminum in the steel and increase the ratio of aluminum. Composite deoxidizer design composition (weight %):

[0020] Al 60, Ca 2, Si 10.46, and Fe are the balance, and the induction furnace used is the same as in Example 1. Ingredients:

[0021] Metal aluminum 300kg, silicon-calcium alloy (Si 60 Ca 28 ) 40kg, steel scrap 165kg. Made alloy composition:

[0022] the element

[0023] The total weight of the alloy is 484kg, the fire consumption is 3.22%, and the specific gravity is 4.47g / cm 3 , Melting point 1100°C.

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Abstract

The invention provides steel-smelting complex deoxidizing agent- calcium-aluminium- ferrum alloy. It is to solve problems of great loss of aluminium during deoxidation process, low effective component content, bad utilization rate and large consumption, easy secondary oxidation and Al2O3 generation. The alloy comprises aluminium 20- 70%, calcium 1- 10% and left is ferrum and inevitable foreign substance. The manganese 1- 20%, silicon 1- 20% and titanium 1- 5% can be added into said alloy to prevent alloy efflorescence and increase steel alloy element. The invention is characterized by high deoxidation efficiency, lowered foreign substance content in steel, smooth steel smelting process, improved steel quality and reduced cost.

Description

technical field [0001] The invention is an aluminum-calcium-iron alloy used for deoxidation in steelmaking. technical background [0002] In steelmaking, impurities such as oxygen and sulfur in molten steel must be removed to ensure the cleanliness of molten steel in order to improve the quality of steel. Deoxidation in steelmaking is mainly done with additive deoxidizers. The main material for deoxidation is aluminum and aluminum-based composite alloys. Aluminum and aluminum-based composite alloys have large burning losses during the deoxidation process, low active ingredients, poor utilization rates, and large additions. At the same time, it is easy to secondary oxidation to produce Al 2 o 3 Inclusions often cause water blocking. Among the deoxidizing elements, calcium is equivalent to aluminum, and it has desulfurization effect. But due to its light specific gravity (1.54g / cm 3 ), flammable (melting point 850°C), cannot be used directly in steelmaking. Contents of ...

Claims

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Application Information

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IPC IPC(8): C21C7/06
Inventor 谢应凯
Owner 谢应凯
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