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A kind of production technology of vanadium-containing steel bar

A production process and steel bar technology, applied in the field of metallurgy, can solve the problems of low utilization rate of vanadium resources and high production cost, and achieve the effects of shortening the production process, increasing metal yield and reducing production cost

Active Publication Date: 2021-03-16
CISDI ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present invention provides a production process for vanadium-containing steel bars in order to solve the problems of high production cost and low utilization rate of vanadium resources in the above-mentioned production process of vanadium-containing steel bars

Method used

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  • A kind of production technology of vanadium-containing steel bar

Examples

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Embodiment 1

[0025] like figure 1 Shown is a production process for a vanadium-containing steel bar, comprising the following steps:

[0026] A. Direct reduction stage: Pre-reduce the vanadium-titanium iron ore concentrate to obtain vanadium-titanium metallized pellets, wherein the metallization rate of the vanadium-titanium metallized pellets is ≥85%, the carbon content is ≤2.0%, and the vanadium pentoxide content is ≥0.5 %, the pre-reduction method of vanadium-titanium iron concentrate is coal-based, and the reaction furnace used is coal-based shaft furnace;

[0027] B. Melting oxidation separation stage: In step A, vanadium-titanium metallized pellets are heated and melted, and vanadium-rich slag and vanadium-containing molten iron are obtained by controlling the melting process. The vanadium oxide content is 4-8%, the vanadium content in the vanadium-containing hot metal is 0.03-0.15%, the temperature of the vanadium-containing molten iron is ≥1550°C, and the smelting device is an ele...

Embodiment 2

[0031] The difference between Example 2 and Example 1 is that the pre-reduction method of vanadium-titanium-iron concentrate in step A is gas-based, and the reaction furnace used is a shaft furnace.

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Abstract

The invention belongs to the technical field of metallurgy and relates to a production technology of a vanadium-containing reinforcing steel bar. The production technology comprises a direct reductionstage, a melting oxidation-separation stage, a refined adjustment stage and a molten steel forming stage, wherein a vanadium ferrotitanium concentrate raw material is pre-reduced at the direct reduction stage, vanadium-titanium metallized pellets are obtained, the vanadium-titanium metallized pellets are heated to be molten at the melting oxidation-separation stage, vanadium-containing slag and vanadium-containing molten iron are obtained by controlling the melting separation process, the vanadium-containing molten iron is subjected to component and temperature adjustment at the refined adjustment stage, and the molten steel which is qualified after refining is subjected to continuous casting and rolling at the molten steel forming stage so as to prepare the vanadium-containing reinforcing steel bar. The technological process is short, the vanadium resource in vanadium ferrotitanium concentrate is sufficiently utilized, the metal yield is high, and the production cost of the vanadium-containing reinforcing steel bar is reduced.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and relates to a production process of vanadium-containing steel bars. Background technique [0002] From November 1, 2018, the new national standard for steel bars GB / T 1499.2-2018 "Steel for Reinforced Concrete Part II: Hot-rolled Ribbed Steel Bars" began to be implemented. The new standard canceled 335MPa steel bars and added 600MPa steel bars to form 400MPa, 500MPa, and 600MPa strength series grades have been added, and metallographic structure inspection regulations and supporting macroscopic metallography, cross-section Vickers hardness, and microstructure inspection methods have been added as the basis for judging hot-rolled steel bars and water-piercing steel bars, which can effectively avoid Water-piercing steel bars are used to imitate hot-rolled steel bars. [0003] The implementation of the new standard marks the development of steel bars in the direction of high strength, high tou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/12C22C38/04C22C38/02C22C33/04C22B1/02
CPCC22B1/02C22C33/04C22C38/02C22C38/04C22C38/12
Inventor 游香米杨宁川方文
Owner CISDI ENG CO LTD