The raw materials for smelting antimony ores mainly include 10 kinds of antimony ores, such as Stibnite, stibnite and antimony sinter. There are more than 120 kinds of antimony ores in nature, among which Stibnite, jamesonite, antimony clam stone, etc. are of industrial value. China is rich in antimony ore resources, with important reserves, production (antimony concentrate, antimony metal), and exports in the world.
The process of antimony ore beneficiation production line generally involves selecting a portion of antimony ore or gangue using both the front and back hands, or discarding a portion of tailings using heavy media; Single antimony ore beneficiation production lines generally use flotation method for recovery; The mixed antimony ore beneficiation production line first eliminates the mixed concentrate, and then selects some antimony ore or gangue through sulfide ore flotation and oxidized ore; For tungsten ore, first, a shaking table gravity separation is used to produce gold, mixed concentrate, and tailings, and then the mixed concentrate is flotation to obtain a gold antimony mixed concentrate; For tailings flotation, direct flotation.
Antimony ore beneficiation production line technology and beneficiation methods
Manual selection process for antimony ore production line:
Utilizing the differences in color, luster, and shape between antimony ore and gangue in ore extraction, the manual separation process of antimony ore production line is relatively primitive and labor-intensive. However, it can produce a large amount of high-quality antimony ore concentrate, which can reduce beneficiation costs and energy consumption. The manual selection process of antimony ore production line is generally completed on the manual selection belt equipment, and many are also completed in the mine pit or mouth.
The massive antimony concentrate selected by the manual concentration process of the antimony ore production line can be directly volatilized and roasted in the vertical roasting furnace to prepare Antimony trioxide with only 7% antimony content. The massive antimony sulfide concentrate containing more than 45% antimony can be manually selected to prepare pure Antimony trisulfide (commonly known as raw antimony) for munitions production through the melting out method.
The particle size of the ore suitable for the manual selection process of antimony ore production lines is mostly between 28 and 150 millimeters. Most antimony beneficiation plants use wide grade antimony ore production line manual beneficiation process, while only a few plants, such as Xikuang North beneficiation plant, use narrow grade antimony ore production line manual beneficiation process. Because the raw ore often contains mud, ore washing operation is often an essential preparation work before the manual selection process of antimony ore production line. Hand selected raw ore after washing is more effective than direct selection without washing.
Antimony ore production line gravity separation process:
Suitable for most antimony ores, as antimony ores are minerals with high density and coarse particles, making them easy to separate from gangue using mineral processing methods. In summary, both single sulfide antimony ore and sulfide oxide mixed antimony ore have good conditions for antimony ore production line gravity separation process. Moreover, the cost of the antimony ore production line gravity separation process is low, and it can select a large number of qualified coarse concentrate within a relatively coarse particle size range, discarding a large amount of waste rock. Therefore, the antimony ore production line gravity separation process is still a preferred method for antimony ore concentrators. The equipment for heavy antimony ore beneficiation mainly refers to a tripping machine, and sometimes a shaking table is also used.
Antimony production line heavy medium process:
Usually used for pre selection of antimony ore. Liao Jian proved that in addition to antimony ore with crystal cavity structure, the heavy medium process of antimony ore production line can also be used.
The difficulties in the heavy medium process of antimony ore production line are the selection of weighting agents, the preparation and recovery of the medium. As a substance used as a weighting agent, practice has shown that the steel jade waste (ferrosilicon) from the grinding wheel factory is ideal. The magnetic content of this material is 70-98%, and the chemical composition is mainly silicon and iron. The medium preparation system of the beneficiation plant is refined to below 74 microns, accounting for 98%, and used as a weighting agent to maintain the medium density at around 2.65 grams/cm3, which is completely possible and easy to recycle.
Antimony production line flotation process:
The flotation process of antimony ore beneficiation production line is the most important method for selecting antimony ore. Sulfide antimony ore belongs to flotation minerals, and the flotation process of antimony ore beneficiation production line is often used to improve the ore grade. Among them, Stibnite is usually activated by lead salt, and also copper salt or lead salt copper salt are used together, and then flotation is carried out with a collector. The commonly used trapping agent is butyl xanthate or a mixture of Shale oil and ethyl sulfur nitrogen, and the foaming agent is terpineol oil or No. 2 oil; Antimony oxide ore is a difficult to float ore, mainly using the gravity separation process of antimony ore beneficiation production line.
Composition of antimony ore beneficiation equipment:
1. Antimony ore beneficiation equipment crushing equipment - jaw crusher.
2. Antimony ore beneficiation equipment grinding equipment - antimony ore ball mill.
3. Antimony ore beneficiation equipment flotation device - Antimony ore flotation device.
4. The antimony ore beneficiation production line will also use vibration feeders, spiral classifiers, belt conveyors, thickeners, and other related supporting antimony ore beneficiation equipment.