Question

define calsination and roasting​

Answer 1

Answer:

❤ʀᴏᴀsᴛɪɴɢ ɪs ᴛʜᴇ ᴘʀᴏᴄᴇss ɪɴ ᴡʜɪᴄʜ ᴛʜᴇ ᴏʀᴇ ɪs ʜᴇᴀᴛᴇᴅ ʙᴇʟᴏᴡ ɪᴛs ᴍᴇʟᴛɪɴɢ ᴘᴏɪɴᴛ ɪɴ ᴘʀᴇsᴇɴᴄᴇ ᴏғ ᴀɪʀ ᴛᴏ ᴏxɪᴅɪsᴇ ᴛʜᴇ ɪᴍᴘᴜʀɪᴛɪᴇs.

❤ᴄᴀʟᴄɪɴᴀᴛɪᴏɴ ɪs ᴛʜᴇ ᴘʀᴏᴄᴇss ᴏғ ʜᴇᴀᴛɪɴɢ ᴛʜᴇ ᴏʀᴇ ʙᴇʟᴏᴡ ɪᴛs ᴍᴇʟᴛɪɴɢ ᴘᴏɪɴᴛ ᴀɴ ᴀʙsᴇɴᴄᴇ ᴏғ ᴀɪʀ ᴛᴏ ʀᴇᴍᴏᴠᴇ ᴠᴏʟᴀᴛɪʟᴇ ɪᴍᴘᴜʀɪᴛɪᴇs ʟɪᴋᴇ ᴀʀsᴇɴɪᴄ ᴇᴛᴄ.

Answer 2

Answer:

Roasting is the process in which the ore is heated below its melting point in presence of air to oxidise the impurities. Calcination is the process of heating the ore below its melting point an absence of air to remove volatile impurities like arsenic etc

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