Tin Smelting Process Diagram

Smelting reduction is the only way to produce tin. The law more moderate grade tin concentrate as raw materials, the main process tin concentrates before refining process, reducing smelting, slag smelting and refining crude tin.

Tin concentrates often containing a variety of impurities, the purpose of refining the pre-treatment is to improve concentrate grade tin, remove harmful impurities and recovery of valuable metals. Refining process before a selection, roasting and leaching three kinds of methods, which use the most is the selection and roasting methods. Before and after the refining process of tin concentrate grade is generally 55% to 68%.

Tin tin vein deposits into two major categories of sand deposits and tin deposits, the former is the primary ore, the latter for secondary ore.

Currently mining tin veins lowest grade of 0.15% to 0.2%.

Cassiterite usual to beneficiation. Provide smelting tin concentrates by grade are divided into three types, the first category is a high-grade tin concentrates, tin 70%, the second category is medium grade tin concentrates, tin containing 40% to 50%, the third category is or in mine low-grade tin concentrates, tin containing 5% to 20%.

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