Calcium Silicon Cored Wire For Converter Steelmaking

Calcium Silicon Cored Wire for Converter Steelmaking is an indispensable high-end metallurgical material in converter steelmaking and ladle refining processes. Using high-purity calcium silicon alloy powder as the core material, it is precisely wrapped and rolled from high-quality low-carbon cold-rolled steel strip. Through a wire feeder, it is accurately fed deep into the molten steel, solving problems such as severe oxidation and volatilization, low yield, and unstable metallurgical effects associated with traditional blocky calcium silicon alloys.

Q1: Why is silicon-calcium cored wire preferred for converter steelmaking instead of blocky silicon-calcium alloy?

A1: After tapping from the converter, the molten steel temperature is high, and the oxygen and sulfur content is high. Adding blocky silicon-calcium alloy easily leads to rapid oxidation and volatilization, resulting in extremely low calcium yield, unstable metallurgical effects, and significant dust pollution. Silicon-calcium cored wire, wrapped with steel strip, can be precisely fed into the deep layers of the molten steel, preventing calcium oxidation, increasing the yield by more than 100%, and providing stable metallurgical effects. It also simplifies operation and reduces costs, making it the preferred material for high-end converter steelmaking.

Q2: How to choose between Ca28Si60 and Ca30Si60 grades?

A2: Ca30Si60 has a higher calcium content, resulting in stronger deoxidation and desulfurization effects, making it suitable for producing high-end steels such as low-carbon steel, ultra-low-sulfur steel, pipeline steel, and automotive steel. Ca28Si60 offers better cost-effectiveness, with deoxidation and desulfurization effects sufficient for the production of conventional steels such as plain carbon steel and low-alloy steel. The choice depends on your specific steel requirements and cost budget.

Q3: How is the wire feed rate precisely controlled? Do you provide technical support?

A3: The wire feed rate is mainly determined based on factors such as the final oxygen and sulfur content of the molten steel, the steel grade, and the furnace charge. The standard rate is 0.8-1.5 kg/t of steel, which can be adjusted to 1.5-2.0 kg/t of steel in deep desulfurization scenarios. We will arrange professional metallurgical engineers to provide precise process parameters such as wire feed rate and feed speed based on your converter specifications and steel grade requirements, offering full technical guidance and assisting you in optimizing your steelmaking process.

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