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Special desoxidant for petroleum tube steel

A technology of petroleum pipes and deoxidizers, which is applied in the field of steel for petroleum pipes, can solve problems such as increased costs, achieve the effects of reducing smelting power consumption and shortening smelting time

Inactive Publication Date: 2015-05-20
LAIWU LUHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deoxidation of the traditional refining furnace is changed from the binary slag system to the ternary slag system to fully absorb the inclusions in the molten steel, but the disadvantage is that it needs to add a large amount of pre-melting slag, refining slag, aluminum, silicon carbide, calcium carbide and other auxiliary materials, resulting Increased costs

Method used

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  • Special desoxidant for petroleum tube steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Al 22%, AI2O3 28%, SiO? 0.1, C 0.1, non-water-soluble binder 0.1, additive 5%, the balance is Fe, and the particle size of Al and AI2O3 is 1mm.

Embodiment 2

[0012] Al 33%, AI2O3 43%, SiO? 3%, C 2%, non-water-soluble binder 0.3%, additive 18%, the balance is Fe, and the particle size of Al and AI2O3 is 3mm.

Embodiment 3

[0014] Al 25%, AI2O3 35%, SiO? 1.5%, C 1.2%, non-water-soluble binder 0.2%, additive 10%, the balance is Fe, and the particle size of Al and AI2O3 is 5mm.

[0015] Example 3

[0016] Al 30%, AI2O3 38%, SiO? 2.5%, C 1.5%, non-water-soluble binder 0.2%, additive 15%, the balance is Fe, and the particle size of Al and AI2O3 is 4mm.

[0017] The following table shows that in schemes 0-5, with the increase of iron powder, the specific gravity increases, and the deoxidation effect continues to improve:

[0018]

[0019] In a 200-ton ladle in a steel plant, the steel type is SPHC, and under the condition of adding 200kg of aluminum and iron, the deoxidation is compared with 0-5 of the present invention, and it is found that when the specific gravity increases, the deoxidation effect is improved. The specific gravity of the deoxidizer is increased, the phenomenon of metal aluminum burning on the slag surface is reduced, the utilization rate of metal aluminum is improved, and the d...

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Abstract

The invention relates to a special desoxidant for petroleum tube steel. The desoxidant is characterized by being prepared from the following components in percentage by weight: 22-33 percent of Al, 28-43 percent of Al2O3, 0.1-3 percetn of SiO2, 0.1-2 percent of C, 0.1-0.3 percent of water-insoluble adhesive, 5-18 percent of an additive and the balance of Fe, wherein the granularity of Al and Al2O3 is not more than 5mm. The desoxidant can be used for achieving the effects of quickly deoxidizing, adsorbing impurities, shortening melting time, reducing electricity consumption for melting and greatly reducing melting cost, and can meet the special requirement for steels for petroleum tubes.

Description

Technical field [0001] The invention relates to the technical field of steel for petroleum pipes, in particular to a special deoxidizer for steels for petroleum pipes. Background technique [0002] Steel for petroleum pipes is a special steel with extremely high quality requirements. It requires extremely high corrosion resistance, wear resistance, low temperature fatigue resistance and corrosion resistance, so it has strict requirements on the smelting process. The deoxidation of the traditional refining furnace is changed from the binary slag system to the ternary slag system to fully absorb the inclusions in the molten steel, but the disadvantage is that it needs to add a large amount of pre-melting slag, refining slag, aluminum, silicon carbide, calcium carbide and other auxiliary materials, resulting Increased costs. Contents of the invention [0003] The purpose of the present invention is to provide a special deoxidizer for oil pipe steel, which can replace the abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 李绪宝张保华
Owner LAIWU LUHENG METALLURGICAL MATERIALS CO LTD