why cao and mgo are used for making refractory bricks
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ʙᴇᴄᴀᴜꜱᴇ ɪᴛ ʜᴀᴠᴇ ᴀ ʟᴏᴡ ᴛʜᴇʀᴍᴀʟ ᴄᴏɴᴅᴜᴄᴛɪᴠɪᴛʏ ꜰᴏʀ ɢʀᴇᴀᴛᴇʀ ᴇɴᴇʀɢʏ ᴇꜰꜰɪᴄɪᴇɴᴄʏ ᴀɴᴅ ᴄᴀɴ ʀᴇꜱɪꜱᴛ ʜɪɢʜ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴡɪᴛʜᴏᴜᴛ ᴜɴᴅᴇʀɢᴏɪɴɢ ᴀɴʏ ᴀᴘᴘʀᴇᴄɪᴀʙʟᴇ ᴄʜᴀɴɢᴇ ɪɴ ꜱᴛʀᴜᴄᴛᴜʀᴀʟ ᴘʀᴏᴘᴇʀᴛɪᴇꜱ ʟɪᴋᴇ ᴍᴇʟᴛɪɴɢ ᴏʀ ꜱᴏꜰᴛᴇɴɪɴɢ.
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