The ore beneficiability is the basis for determining the separation process. However, mining and smelting methods and corresponding requirements, as well as existing resources and production conditions, should also be considered. For the tin ore processing, it is necessary to understand the commonness of all kinds of tin ores in all kinds of tin deposits, as well as the characteristics of tin ores different from other metal ores.
Compared with general nonferrous metal ores, tin ores have the following characteristics in terms of beneficiability, resources and production:
① The singleness of valuable tin minerals and the diversity of valuable associated minerals;
② Cassiterite is stable in natural weathering process and fragile in grinding process;
③ High grade requirements of raw ore and concentrate;
④ The relative concentration of mineral deposits and the relative dispersion of mining and production determine that the tin ore processing is mainly gravity washing and separation, with the combination of physical beneficiation methods such as gravity, magnetism, floatation and electricity, as well as chemical processing methods such as roasting, volatilization and leaching; Implement multi-stage grinding, separation, early collection and early discard，and strengthen pre concentration and desliming and other operations. The products are mainly tin, which are comprehensively utilized, not only the production of high-grade concentrate in line with smelting requirements, but also the production of other low-grade tin products; production scale should adjust measures to local conditions, large, medium and small combination.
Because the ratio of tin ore is large, it often uses gravity separation, with flotation, magnetic separation, electrostatic separation, roasting, volatile leaching and other processes. Heavy medium separation is commonly used in tin processing, which is mainly used for ore pre separation, that is, the preliminary separation of coarse concentrate, the commonly used gravity separation equipment is shaking table, jig machine, spiral concentrator, centrifugal concentrator, belt chute and so on. At present, the shaking table is the main equipment in the tin processing plant, which is used for the treatment of 0.037-2mm fine cassiterite. The high concentration ratio of the shaking table can not only collect the high-grade concentrate, but also separate the final tailings. At present, most of the tin concentrate sent for smelting is the shaking table separation products. Jig machine are mostly used to separate coarse and medium-grained cassiterite; spiral concentrators are used to effectively recover 0.074-1 mm grain sized cassiterite; for slimes less than 37μm, centrifugal concentrators and belt chutes are mainly used for separation.
The application of flotation in tin ore processing mainly has the following three aspects:
First, it is used for flotation separation, recovery and removal of various associated sulfide minerals;
Second, it is used for separation and recovery of associated minerals in coarse concentrate cleaning;
Third, the flotation of tin minerals, fine cassiterite is mainly flotation from mud. Magnetic separation and electrostatic separation are mainly used in the separation process of tin coarse concentrate, separating and recovering various associated minerals with similar specific gravity to cassiterite.
YEES Minging Equipement specializes in the production of all kinds of mining equipment, mineral processing equipment, mineral washing equipment, etc. We offer high quality products, perfect one-stop solution service includes mineral process design, plant layout design, machine installation and debugging and so on, welcome customers to inquire.
