Yellow tin placer ore is an important type of tin ore, with high tin content and extensive ore distribution, which has received widespread attention both domestically and internationally. The beneficiation process of yellow tin placer ore refers to the process of treating the raw ore through a series of physical and chemical methods to improve its grade and recovery rate. This article will provide a detailed introduction to the beneficiation process of yellow tin placer ore for readers' reference.
I. Mineralogy Characteristics of Yellow Tin Placer
Yellow tin placer is mainly composed of cassiterite, quartz, Calcite, hard iron ore, Pyrite and other minerals. Cassiterite is the main mineral of yellow tin placer, with tin content up to 60%, while quartz, Calcite, etc. are associated minerals of yellow tin placer.
2、 The beneficiation process flow of yellow tin placer ore
1. Grinding
The first step in the beneficiation process of yellow tin placer ore is grinding, which involves crushing the raw ore for subsequent sorting and flotation operations. Grinding is generally carried out using a ball mill, which aims to break the raw ore into a certain particle size for subsequent sorting and flotation operations.
2. Selection
sorting is the second step in the beneficiation process of yellow tin placer ore, with the aim of separating useful and useless minerals from the raw ore. The general method of separation is the gravity separation method, which utilizes the differences in specific gravity of different minerals for separation. In yellow tin placers, the specific gravity of cassiterite is greater than that of associated minerals, so cassiterite and associated minerals can be separated by gravity separation.
3. Flotation
Flotation is the third step in the beneficiation process of yellow tin placer ore, with the aim of further purifying and recovering the useful minerals that have already been separated. The cassiterite in yellow tin placer ore generally adopts the forward and reverse flotation method, which involves first performing forward flotation to float the cassiterite, and then conducting reverse flotation to float the accompanying minerals, thereby achieving the purification and recovery of cassiterite.
4. Hot dip method
The hot leaching method is an auxiliary purification method in the beneficiation process of yellow tin placer ore, which mainly removes impurities from cassiterite. The hot leaching method generally uses sodium hydroxide for treatment. Cassiterite is soaked in sodium hydroxide solution, and then heated to dissolve impurities in cassiterite, so as to improve the grade and recovery rate of cassiterite.
3、 Conclusion
The beneficiation process of 
yellow tin placer ore is a complex process that requires multiple physical and chemical methods to improve its grade and recovery rate. This paper introduces the Mineralogy characteristics and beneficiation process of yellow tin placer, hoping to be helpful to readers.
