Behold I have refined
tsaraph  (tsaw-raf')
to fuse (metal), i.e. refine -- cast, (re-)fine(-er), founder, goldsmith, melt, pure, purge away, try.
thee but not with silver
keceph  (keh'-sef)
silver (from its pale color); by implication, money -- money, price, silver(-ling).
I have chosen
bachar  (baw-khar')
to try, i.e. (by implication) select -- acceptable, appoint, choose (choice), excellent, join, be rather, require.
thee in the furnace
kuwr  (koor)
a pot or furnace (as if excavated) -- furnace.
of affliction
`oniy  (on-ee')
depression, i.e. misery -- afflicted(-ion), trouble.