Tin

Tin ore is added by several of the major tech mods Thermal Expansion, RedPower 2, IndustrialCraft 2 and Forestry. It can be processed into dust using one of many machines from the various mods. Processing the ore with one of these machines can double or even triple your ingot output. Like all other ores it can also be smelted in any furnace or other smelting machine. Tin Ingots are used in many crafting recipes.

Processing
Tin ore can be smelted using any smelting machine or furnace

To double or even triple your ore out put you will need to use one of the processing machines. The dust from these machines will need to be smelted in a smelting machine or furnace.

Tin can be made into Ingots or Dust after which point it can be converted in to Nuggets or Storage Blocks It is also used to make Brass Ingot

World Generation
Ore world generation is controlled in the config files of the mods that add it. To have only one type of an ore generated turn off the ore generation in the config files for all but 1 of the mods. Thermal Expansion and CoFH Core offer you the ability to tweak the spawn rate of all modded and vanilla ores.