The smelting efficiency of antimony rotary furnaces is influenced by several key factors, which can be analyzed in terms of equipment structure, operating parameters, material characteristics, and system coordination.

Regarding furnace structure and operating parameters, the furnace's diameter, length, lining material, and internal lifting structures directly affect material tumbling, heat transfer, and reaction uniformity. Rotation speed and inclination angle determine material residence time and forward velocity; excessive speed or inclination leads to insufficient residence time and incomplete reduction, while speeds or angles that are too low can cause material accumulation and ring formation, thereby reducing processing capacity. Temperature distribution is equally critical; the furnace requires appropriate temperature zones for preheating, reduction, and discharge. Excessively low temperatures slow down the reaction, whereas excessively high temperatures exacerbate antimony volatilization losses and furnace lining erosion.

In terms of material properties and reducing agent quality, factors such as ore powder particle size, moisture content, antimony grade, impurity levels, and residual sulfur content affect reduction efficiency. Excessively coarse particles result in incomplete reactions, while particles that are too fine are prone to dusting; high moisture content increases heat consumption. The quality, particle size, mixing ratio, and feeding method of the reducing agent directly determine the reduction atmosphere and the antimony reduction rate. An insufficient ratio leads to incomplete reduction, while an excess causes waste and compromises the quality of the crude antimony.

Regarding the flue gas system and operational control, factors such as smooth flue gas discharge, stable furnace pressure, and the coordination between dust removal and waste heat recovery affect furnace temperature and smelting continuity. High flue gas resistance or significant air leakage can lead to temperature fluctuations and increased energy consumption. Additionally, feeding speed, discharge cadence, equipment sealing, and the level of automation control also impact overall efficiency.

In summary, the smelting efficiency of antimony rotary furnaces is influenced by a combination of factors, including furnace structure, rotation speed, inclination angle, temperature distribution, material properties, reducing agent quality, and flue gas system coordination; comprehensive optimization is required to achieve efficient, stable, and low-consumption operation.