a steelmaking method

A technology for ladle and molten steel, applied in the field of metallurgy, can solve the problems of out-of-control product composition or performance, large fluctuation of nitrogen content, etc., and achieve the effect of good titanium yield and stable titanium content

Active Publication Date: 2020-12-04
PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the metallurgical process, alloys such as ferro-titanium are usually used for alloying, but conventional 40-ferro-titanium and 70-ferro-titanium contain high nitrogen content, and the nitrogen content fluctuates greatly, fluctuating in the range of 500-7000ppm, In the process of alloying with this kind of ferro-titanium, it is very easy to cause the composition or performance of the product to be out of control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Converter process: add iron-containing slag steel coolant to the converter before and during the middle period of smelting, and add 5.0kg / t to the furnace at the end of converter smelting 钢 of high magnesium lime and 2.0kg / t 钢 After the thick slag treatment by the modifier for 3 minutes, the steel is tapped to ensure that the ladle clearance is 450mm; from the end of the blowing to the tapping, the bottom blowing of argon is carried out for 2 minutes, and the flow rate of a single brick is 60Nm 3 / h; converter end point control C is 0.08wt%, and TFe in the end point steel slag is 10wt%; 2.2kg / t steel active lime and 3.5kg / t steel slag adjusting agent are added to the ladle after tapping the converter; The amount is controlled at a ladle slag thickness of 55mm;

[0063] LF process control: molten steel reaches the treatment level, add 3.0kg / t 钢 Active limestone and 1.5kg / t 钢 The slag adjustment agent; ladle bottom blowing argon, argon flow rate of 800NL / min; heating p...

Embodiment 2

[0067] Converter process: add iron-containing slag steel coolant to the converter before and during the middle period of smelting, and add 3.0kg / t to the furnace at the end of converter smelting 钢 of high magnesium lime and 2.3kg / t 钢 After the thick slag treatment by the modifier for 3 minutes, the steel is tapped to ensure that the ladle has a clearance of 400mm; from the end of the blowing to the tapping, the bottom blowing of argon is carried out for 2 minutes, and the flow rate of a single brick is 72Nm 3 / h; the converter end point control C is 0.06wt%, and the TFe in the end point steel slag is 18wt%; after tapping the converter, add 4.0kg / t steel active lime and 2.0kg / t steel slag adjusting agent; The amount is controlled at a ladle slag thickness of 54mm;

[0068] LF process control: molten steel reaches the treatment level, add 1.0kg / t 钢 Active limestone and 1.5kg / t 钢 slag adjustment agent; ladle bottom blowing argon, argon flow rate of 400NL / min; heating process t...

Embodiment 3

[0072] Converter process: add iron-containing slag steel coolant to the converter before and during the middle period of smelting, and add 4.5kg / t to the furnace at the end of converter smelting 钢 of high magnesium lime and 1.5kg / t 钢 After the thick slag treatment with the modifier for 3 minutes, the steel is tapped to ensure that the ladle is 500mm clear; after the blowing is completed and the steel is tapped, the bottom blowing argon is carried out for 3 minutes, and the flow rate of a single brick is 65Nm 3 / h; converter end point control C is 0.07wt%, TFe in the end point steel slag is 15wt%; add 3.0kg / t to the ladle after converter tapping 钢 Active lime and 1.5kg / t steel slag adjustment agent; after tapping, the amount of slag discharged from the converter is controlled at a ladle slag thickness of 45mm;

[0073] LF process control: molten steel reaches the treatment level, add 2.0kg / t 钢 Active limestone and 3.0kg / t 钢 The slag adjustment agent; ladle bottom blowing arg...

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Abstract

The invention provides a steelmaking method. Titanium sponge is directly used for alloying in the steelmaking process. The steelmaking method adopts the titanium sponge for alloying, and the nitrogencontent of the titanium sponge is low and stable. The steelmaking method adopts the titanium sponge for alloying, thus the yield of the titanium element in a prepared product is high, the content of the nitrogen element in the prepared product is stable, thus the product is stable in composition, and then stable performance is achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a steelmaking method. Background technique [0002] Sponge titanium is the main raw material for producing industrial titanium alloys, which can be used to process titanium materials, titanium powder and other titanium components. In the prior art, titanium sponge is used to prepare titanium alloy through the process of preparing titanium sponge from titanium minerals, and then titanium alloy is prepared from titanium sponge. In the metallurgical process, alloys such as ferro-titanium are usually used for alloying, but conventional 40-ferro-titanium and 70-ferro-titanium contain high nitrogen content, and the nitrogen content fluctuates greatly, fluctuating in the range of 500-7000ppm, In the process of alloying with this ferro-titanium, it is very easy to cause the composition or performance of the product to be out of control. [0003] Therefore, how to optimize the alloyi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C21C5/36C21C7/00C21C7/10C21C7/068
CPCC21C5/36C21C7/0006C21C7/0087C21C7/068C21C7/10C22C33/04
Inventor 陈刚黄基红何俊峰黄汝铿
Owner PANGANG GRP XICHANG STEEL & VANADIUM CO LTD
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