In the acidic wet antimony smelting process, the extraction device is the core equipment. Its structure, principle, function and selection have a great impact on production efficiency and product quality. The following is a detailed introduction:

I. Extraction device structure

1. Extraction box: It is composed of a base plate, a bracket and a box body. The box body is provided with a raw liquid port and an extractant port for adding antimony-containing solution and extractant; the stirring mechanism includes a motor and a stirring rod to ensure that the two are fully mixed; the liquid level adjustment mechanism is realized by an electric telescopic rod and an inner tube, which can change the extractable liquid level height of the inner tube; the separation mechanism includes a separation tube, a water pump and a separation barrel, which are used to separate the upper clear liquid and the lower extract.

2. Additional functional components: The pressure valve is installed on the top of the tank cover, which can discharge air pressure to prevent explosion; the hydrothermal mechanism heats the mixed liquid to improve the extraction efficiency; the vibration mechanism is located in the tank body to ensure that the solution and the extractant are fully in contact.

II. Working principle of the extraction device

Mixing stage: Add antimony-containing solution and extractant from the raw liquid port and the extractant port respectively, and start the motor to stir to mix the two. Static precipitation stage: The mixed liquid is statically separated into layers, the upper layer is the clear liquid, and the lower layer is the residual liquid. Separation stage: Start the electric telescopic rod to adjust the height of the inner tube so that it is in the upper clear liquid, start the water pump to extract the clear liquid to the first separation barrel, and the lower residual liquid is discharged into the second separation barrel through the drain pipe to complete the extraction.

3. Function of the extraction device

1. Separation and purification: used to separate and purify antimony elements to improve recovery rate and product quality.

2. Large processing capacity: can meet the needs of industrial production.

3. No pollution: more environmentally friendly than traditional processes.

When selecting an extraction device for the acid hydrometallurgical antimony smelting process, many factors need to be considered comprehensively. Considering system characteristics such as solution stability, fluidity, and phase separation difficulty, for solution systems with high stability requirements, it is advisable to select equipment with short residence time, such as centrifugal extractors; when the separation task requires many theoretical stages, a mixing clarifier or extraction tower is ideal; when the processing volume is large and there are no strict restrictions, a mixing clarifier is economical and efficient; the equipment investment budget and maintenance difficulty must also be considered. If the investment budget is sufficient and the plant area is limited, a centrifugal extractor can be selected, and suitable equipment should be selected based on plant conditions and design and operating experience.