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A method for refining and deoxidizing low-carbon and low-silicon welding wire steel

A low-carbon, low-silicon, welding wire steel technology, applied in the field of refining, can solve problems such as continuous casting nozzle clogging, achieve the effects of solving clogging, stable and controllable silicon content, and reducing production

Active Publication Date: 2021-06-25
SGIS SONGSHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a method for refining and deoxidizing low-carbon and low-silicon welding wire steel. By optimizing the refining and deoxidizing method, the blockage of the continuous casting nozzle can be solved and the problem of subcutaneous air bubbles of the continuous casting slab can be reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The specific steps are: add 2.5kg / t of low-carbon ferromanganese, 2.6kg / t of ferro-aluminum, 1kg / t of silicon-manganese, and 0.004% of Als in the argon station during the tapping process of the converter. According to the content of Als in the argon station sample 0.004%≤0.005%, 1.6-2kg / t of high-alumina refining slag is added to the refining station, and 1.7kg / t of high-alumina refining slag is actually added. The actual silicon content of sample 1 in subsequent refining is 0.017%. When the silicon content of sample 1 is between 0.01-0.02%, 0.15-0.25kg / t of ferrosilicon powder is added, and 0.2kg / t of ferrosilicon powder is actually added. The actual silicon content of refined sample 2 is 0.011%. When the silicon content of sample 2 is between 0.01-0.02%, 0.6-0.8m / t of silicon-barium wire is fed, and 0.8m / t of silicon-barium wire is actually fed. Calcium treatment feeds pure calcium line 1.2-1.5m / t, and actual calcium treatment feeds pure calcium line 1.3m / t. The outg...

Embodiment 2

[0022] The specific steps are as follows: 2.5kg / t of low-carbon ferromanganese, 2.7kg / t of ferro-aluminum, 1kg / t of silicon-manganese, and 0.013% Als content in the argon station are added during the tapping process of the converter. According to the Als content of 0.013% in the argon station sample is between 0.005-0.015%, 1-1.6kg / t of high-alumina refining slag is added to the refining station, and 1.2kg / t of high-alumina refining slag is actually added. The actual silicon content of subsequent refining sample 1 is 0.022%, and no ferrosilicon powder is added when the silicon content of sample 1 is ≥0.02%. The actual silicon content of refining sample 2 is 0.015%. When the silicon content of sample 2 is between 0.01-0.02%, the silicon-barium wire is fed at 0.6-0.8m / t, and the actual silicon-barium wire is fed at 0.6m / t. Calcium treatment feeds pure calcium line 1.2-1.5m / t, and actual calcium treatment feeds pure calcium line 1.3m / t. The outgoing Als content of the molten ste...

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Abstract

The invention relates to a method for refining and deoxidizing low-carbon and low-silicon welding wire steel. The specific steps are as follows: 1) deoxidizing and alloying molten steel by tapping out of a converter; For deoxidation, add ferrosilicon powder for deoxidation. By optimizing the refining deoxidation method, the clogging of the continuous casting nozzle is solved, and the problem of subcutaneous air bubbles of the continuous casting slab is reduced.

Description

technical field [0001] The invention belongs to the technical field of refining methods, and relates to a method for refining and deoxidizing low-carbon and low-silicon welding wire steel. Background technique [0002] When smelting low-carbon and low-silicon welding wire steel, the deoxidation of molten steel is the key to refining control. If the deoxidation is not good during the refining process, water blocking will easily occur during continuous casting and pouring, and serious subcutaneous air bubbles will occur in the billet. [0003] The first is "A Method for LF Refining and Deoxidation of Low Carbon Welding Wire Steel" with the patent application number CN201710197468.8. The molten steel is smelted in a converter and then refined in an LF furnace; a mixture of ferrosilicon powder and carbon powder is used in the LF furnace. Bubble deoxidizer, realize the whole process of small batches and multi-batches to add to the slag surface for diffusion deoxidation through th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06C21C7/00
CPCC21C7/0006C21C7/0056C21C7/06
Inventor 刘志龙万翔曾令宇刘志明任世岗胡现锋余衍丰余大华赵科邓长付韦乾永王冠
Owner SGIS SONGSHAN CO LTD
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