Beneficiation process of yellow tin ore

Xanthite is a tin bearing ore, which is mainly composed of cassiterite and Pyrite. In industrial production, the beneficiation process of yellow tin ore is very important. This article will introduce the beneficiation process of yellow tin ore, including beneficiation principles, beneficiation processes, beneficiation equipment, and beneficiation operation steps.

1、 Mineral processing principle

The beneficiation principle of cassiterite is to effectively recover cassiterite by separating Pyrite and cassiterite. Pyrite is an iron ore with the main component of FeS2, while cassiterite is a tin ore with the main component of SnO2. In the process of beneficiation, firstly, the pyrite should be broken into ores within a certain size range, and then Pyrite and cassiterite should be separated by flotation.

2、 Beneficiation process

The beneficiation process of Huangxi ore mainly includes crushing, grinding, flotation, desliming, dehydration, and selection. Among them, flotation is the core link of pyrite beneficiation and also the key to the pyrite beneficiation process.

（1） Crushing

Crushing is the process of crushing yellow tin ore into ores with a certain particle size range for subsequent beneficiation processes. The crushing of yellow tin ore is generally carried out using equipment such as jaw crushers and cone crushers.

（2） Grinding

Grinding is the process of grinding ore into a certain fineness, usually carried out using a ball mill. The purpose of grinding is to grind the ore into a certain fineness of ore powder for subsequent flotation processes.

（3） Flotation

Flotation is the process of separating Pyrite from cassiterite. The flotation of yellow tin ore generally adopts the positive flotation method. The positive flotation method refers to the process of separating Pyrite and cassiterite by adding a certain amount of reagent to the pulp. In the flotation process of yellow tin ore, reagents such as brass ions, yellow iron ions, and mixed ions of brass and yellow iron are mainly used.

（4） Desliming

Desliming is the process of removing impurities such as sediment from flotation foam. The mechanical deslimer is generally used for desliming. The flotation foam is screened and washed to remove the sediment and other impurities.

（5） Dehydration

Dehydration is the process of removing water from flotation foam. Dewatering is generally carried out by a filter press. The flotation foam is filtered and washed to remove the moisture.

（6） Selected

Selection is the process of further purifying cassiterite in flotation foam. Selection is generally carried out through methods such as manual selection, gravity selection, and magnetic separation to remove impurities from cassiterite and improve its grade.

3、 Beneficiation equipment

The beneficiation equipment of Huangxi Mine includes jaw crushers, cone crushers, ball mills, flotation machines, deslimers, filter presses, manual sorting tables, gravity separators, and magnetic separators. These equipment play an important role in the beneficiation process of yellow tin ore, ensuring the smooth progress of the beneficiation process.

4、 Beneficiation operation steps

（1） Ore crushing: Equipment such as jaw crushers and cone crushers are used to crush yellow tin ore into ores within a certain particle size range.

（2） Ore grinding: Using a ball mill to grind the ore into a certain fineness of mineral powder.

(III) Flotation: the process of separating Pyrite and cassiterite by adding a certain amount of reagent to the pulp.

（4） Desliming: mechanical deslimer is used to remove impurities such as sediment from flotation foam.

(V) Dehydration: use a filter press to remove the water in the flotation foam.

(VI) Selection: Using manual selection, gravity selection, and magnetic separation to remove impurities from cassiterite and improve its grade.

5、 Summary

The beneficiation process of yellow tin ore is a complex task that requires the coordination of various equipment and reagents. Through the introduction of this article, readers can learn about the beneficiation principle, beneficiation process, beneficiation equipment, and beneficiation operation steps of yellow tin ore. For technical personnel and engineers engaged in the beneficiation of yellow tin ore, this knowledge is very important.

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