What Details Should be Pay Attention to During the Production of Silico-Manganese?

The production process of silicomanganese requires close attention to three critical details: raw material ratios, furnace temperature control, and safety precautions. Oversights in these areas can directly impact product quality or lead to safety incidents.

Raw materials form the foundation for determining the composition and yield of silicomanganese alloy. Attention must be paid to the following details:

• Precise Component Screening: Manganese ore must contain ≥40% manganese and ≤0.15% phosphorus to prevent product rejection due to excessive phosphorus levels. Select metallurgical coke with fixed carbon ≥85% and ash content ≤15% to ensure adequate calorific value.
• Strict Size Grading: Crush materials to specified particle sizes-e.g., manganese ore at 10-50mm, coke at 15-25mm-to prevent uneven reactivity or localized slagging caused by inconsistent particle sizes.
• Pre-Drying Moisture: Maintain raw material moisture below 1%. Damp materials consume furnace heat and reduce reaction efficiency.

Silicon manganese production relies on the stable operation of electric arc furnaces, where operational details directly impact production efficiency:

• Precise Furnace Temperature Control: During normal production, furnace temperature must be maintained between 1500-1600°C. Adjusting electrode insertion depth and power supply load prevents insufficient silicon content in the alloy due to low temperatures or excessive energy consumption caused by high temperatures.
• Thorough Electrode Management: Regularly inspect electrode sintering to ensure consistent electrode length and prevent short circuits caused by electrode breakage.
• Controlling Iron Tapping Rhythm: Tap iron at regular intervals based on in-furnace reaction progress, typically every 4-6 hours, to prevent prolonged molten iron residence causing furnace bottom uplift. During tapping, observe molten iron flow rate and color to assess alloy composition accuracy.

Minerals electric furnace operations involve risks such as high temperatures, high pressure, and dust. Strict adherence to safety protocols is essential:

• High-Temperature Protection: During iron tapping, operators must wear heat-resistant protective clothing, face shields, and heat-resistant boots to prevent burns from molten iron splashes. Flammable materials must not be stored near the furnace opening to prevent fires.
• Electrical Safety: Regularly inspect power supply system insulation to prevent electric shock or equipment damage from circuit failures.
• Dust Control: During raw material crushing and screening, operators must wear dust masks to reduce respiratory hazards from silicon manganese dust.

Environmental protocols must be integrated throughout production to avoid regulatory penalties:

• Exhaust Gas Treatment: Flue gas from mineral electric furnaces must undergo desulfurization to ensure emission concentrations comply with the "Emission Standard for Air Pollutants from Iron and Steel Industry" (GB 28662-2012).
• Slag Recycling: Slag generated during iron tapping can be recycled for cement or construction materials production, preventing environmental pollution from indiscriminate dumping.

DeDao Company can provide you with a wide range of ferroalloy products. Contact us for more product information and pricing! wangwei@dedaoferrosilicon.com

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