Refining deoxidizing method of low-carbon low-silicon welding wire steel
A low-carbon, low-silicon, welding wire steel technology, applied in the refining field, can solve the problems of continuous casting nozzle blockage, and achieve the effect of solving blockage and reducing subcutaneous bubbles
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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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