Smelting process for producing ultralow-carbon phosphor nickel series steel by high-phosphor molten iron
An ultra-low carbon, molten iron technology, applied in the field of iron and steel smelting, can solve problems such as difficulty in variety development, and achieve the effects of meeting the needs of batch industrial production, avoiding instability, and reducing phosphorus content
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Embodiment 1
[0051] This example provides a smelting process for producing ultra-low-carbon phosphorus-nickel steel with high-phosphorus molten iron. P in the molten iron: 0.136%, and the chemical composition and mass percentage of the smelted product are as follows: C: 0.042%, Si: 0.3%, Mn: 0.68%, Ni: 8.92%, Alt: 0.035%, S≤0.001%, P≤0.003%, N≤0.0035%, the balance Fe and non-removable impurities.
[0052] Specifically include the following steps:
[0053] S1. The loading capacity of molten iron is 153 tons. After pouring the tank, pre-treat the molten iron and perform desulfurization operation. After desulfurization, ensure that the slag is cleaned. S: 0.0020% of the molten iron;
[0054] S2. The nickel plate is put into the furnace together with the steel scrap, and the charging amount is 22 tons, of which the nickel plate adding amount is 14 tons;
[0055] S3. Carry out slag dumping operation after converter slag splashing, slag dumping and slag remaining, the amount of slag remaining i...
Embodiment 2
[0063] This example provides a smelting process for producing ultra-low-carbon phosphorus-nickel steel with high-phosphorus molten iron. P in the molten iron: 0.142%, and the chemical composition and mass percentage of the smelted product are as follows: C: 0.039%, Si: 0.16%, Mn: 0.72%, Ni: 9.01%, Alt: 0.029%, S≤0.001%, P≤0.004%, N≤0.0039%, the balance Fe and non-removable impurities.
[0064] Specifically include the following steps:
[0065] S1. The loading capacity of molten iron is 149 tons. After the tank is poured, the molten iron is pretreated and desulfurized. After desulfurization, the slag is cleaned. S: 0.0020%;
[0066] S2. The nickel plate is put into the furnace together with the steel scrap, and the charging amount is 19 tons, of which the nickel plate adding amount is 14 tons;
[0067] S3. Perform slag dumping operation after converter slag splashing, slag dumping and slag remaining, 2 tons of slag remaining, after slag dumping, scrap steel with regular shape,...
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