Deep desulfurizer for refining ultra-low-carbon steel and manufacturing method thereof

Abstract

The invention discloses an ultralow carbon steel refining deep-desulfurizer and making method, which comprises the following parts: 60%-69% CaO, 11%-20% Al, 5%-10% MgO, 5%-10% SiO2, 1%-5% Al2O3, 0.5%-1.2% Fe2O3, 1%-3% CaF2, 1%-3% B2O3, 1%-3% BaO and impurity. The making technique comprises the following steps: blending; grinding the material with grain size not more than 1mm; inactivating the material; drying; draining the trace element of water; packing.

Description

technical field

[0001] The invention belongs to the technical field of metallurgy, in particular relates to refining technology outside a steelmaking furnace, in particular to a deep desulfurizer for ultra-low carbon steel refining and a manufacturing method thereof. Background technique

[0002] In recent years, users have higher and higher requirements for the purity of steel, and the demand for ultra-low sulfur steel has continued to increase, especially ultra-low carbon, ultra-low sulfur high-grade electrical steel, ultra-low sulfur hydrogen-induced crack resistance high-grade pipelines The smelting technology of new steel types such as steel and high-strength steel needs to be developed urgently. The deep desulfurization technology of molten steel plays an increasingly important role in the entire steelmaking process. The research and development of deep desulfurization agents applied to ultra-low carbon steel is particularly important.

[0003] A lot of in-depth and me...

Examples

Embodiment Construction

[0022] Several specific embodiments of the present invention are introduced below.

[0023] Composition: % by weight

[0024] composition

[0025] Choose any composition in the table, prepare according to the following method: its process steps are

[0026] 1 Mixing: Mix the materials in the proportion of ingredients. Among them, CaO: particle size ≤ 1mm, activity ≥ 300ml; CaF 2 , B 2 o 3 , BaO particle size ≤ 1mm, purity ≥ 98%; Al powder purity ≥ 99.5%, particle size composition: -180~+200 mesh content ≥ 70%, -200 mesh content ≤ 30%.

[0027] 2 Pulverization: Put the mixed material into the crusher for pulverization to avoid agglomeration of the material during the mixing process, so that the particle size of the material is ≤1mm.

[0028] 3 Passivation: In order to suppress the reduction of CaO activity in the deep desulfurizer and suppress the surface oxidation of Al powder and the violent reaction in the application process, passivation treatment is carried ...

technical field

[0001] The invention belongs to the technical field of metallurgy, in particular relates to refining technology outside a steelmaking furnace, in particular to a deep desulfurizer for ultra-low carbon steel refining and a manufacturing method thereof. Background technique

[0002] In recent years, users have higher and higher requirements for the purity of steel, and the demand for ultra-low sulfur steel has continued to increase, especially ultra-low carbon, ultra-low sulfur high-grade electrical steel, ultra-low sulfur hydrogen-induced crack resistance high-grade pipelines The smelting technology of new steel types such as steel and high-strength steel needs to be developed urgently. The deep desulfurization technology of molten steel plays an increasingly important role in the entire steelmaking process. The research and development of deep desulfurization agents applied to ultra-low carbon steel is particularly important.

[0003] A lot of in-depth and me...

Examples

Embodiment Construction

[0022] Several specific embodiments of the present invention are introduced below.

[0023] Composition: % by weight

[0024] composition

[0025] Choose any composition in the table, prepare according to the following method: its process steps are

[0026] 1 Mixing: Mix the materials in the proportion of ingredients. Among them, CaO: particle size ≤ 1mm, activity ≥ 300ml; CaF 2 , B 2 o 3 , BaO particle size ≤ 1mm, purity ≥ 98%; Al powder purity ≥ 99.5%, particle size composition: -180~+200 mesh content ≥ 70%, -200 mesh content ≤ 30%.

[0027] 2 Pulverization: Put the mixed material into the crusher for pulverization to avoid agglomeration of the material during the mixing process, so that the particle size of the material is ≤1mm.

[0028] 3 Passivation: In order to suppress the reduction of CaO activity in the deep desulfurizer and suppress the surface oxidation of Al powder and the violent reaction in the application process, passivation treatment is carried ...