why is ore crushed before any chemical process is attempted

crushed imported coal suppliers - surabhicollege.in... froth flotation process for current coal and improvement ... is crushed and then separated into ... Coal is one of the rich mineral ore in Zambia, in ...Tin - Introduction to the chemical element and its - why is ore crushed before any chemical process is attempted ,... which is turned into tin by smelting. First, the ore is crushed to a powder and washed free of impurities before being ... (an electrical-chemical process that ...