The "rotary furnace-electrolytic refining" process achieves the synergistic effect of "1+1>2" in the purification of antimony resources. The combination of pyrometallurgy and hydrometallurgy significantly improves the purification efficiency, product purity and comprehensive resource utilization rate, while reducing the environmental load. The following is a detailed description of the "rotary furnace-electrolytic refining" process:

I. Rotary furnace pyrometallurgy pretreatment

1. Function: Utilize the high temperature oxidation-reduction environment of the rotary furnace to preliminarily remove impurities such as iron, lead, and arsenic in crude antimony to form high-purity crude antimony. 2. Advantages:

Efficient impurity removal: The continuous rotation of the rotary furnace allows the material to fully contact the oxidant, and the impurities are oxidized and volatilized or form slag.

Energy consumption optimization: By controlling the atmosphere in the furnace (such as oxidizing or reducing properties), the interference of impurities on subsequent electrolysis is reduced.

Scaled production: The rotary furnace is suitable for processing large-scale antimony ores and providing stable raw materials for electrolytic refining.

2. Electrolytic refining and deep purification

1. Function: Using crude antimony after pyrometallurgical pretreatment as the anode, antimony ions are precipitated at the cathode through electrolysis to further remove residual impurities (such as copper, nickel, etc.).

2. Advantages:

High-purity products: Electrolytic refining can obtain metallic antimony with a purity of more than 99.99%, meeting the needs of high-end applications.

Precious metal recovery: Precious metals such as gold and silver enriched in anode mud can be recovered to improve the comprehensive utilization rate of resources.

Environmentally friendly: The electrolysis process does not emit harmful gases such as SO?, which meets the requirements of green metallurgy.

3. Collaborative optimization strategy

Control the crude antimony composition of the rotary furnace to realize the closed-loop circulation of the electrolyte; the precious metals in the anode mud can be used at a high value, and the valuable metals in the slag and smoke can be used to prepare products; analyze the cost structure, and by optimizing the thermal efficiency of the rotary furnace and the efficiency of the electrolytic current, the total cost can be reduced by 15% - 20%. In summary, the "rotary furnace-electrolytic refining" process, with its unique combination of pyrometallurgy and hydrometallurgy, has demonstrated excellent synergistic effects in the field of antimony resource purification. From the efficient removal of impurities and energy consumption optimization of rotary furnace pyrometallurgy pretreatment to the advantages of large-scale production, and then to the high-purity products, precious metal recovery and environmentally friendly characteristics brought by deep purification of electrolytic refining, each step is closely linked and complementary.