Lub tshuab pub tsiaj yog ib qho khoom siv tseem ceeb hauv kev ua liaj ua teb thiab tsiaj txhu. Nws hloov cov ntaub ntawv nyoos xws li nplej, quav nyab, thiab straw mus rau hauv ib daim ntawv ntau dua thiab sib xws. Cov grinders no tuaj nyob rau hauv ntau hom, xws li rauj mills thiab roller mills.
Lub rauj zeb siv high-speed rotating hammers rau pulverize cov khoom noj, haum rau ntau yam ntaub ntawv thiab ua zoo rau ntxhib grinds. Roller mills, ntawm qhov tod tes, ua haujlwm los ntawm kev sib tsoo cov khoom noj ntawm cov menyuam yaus, feem ntau ua rau muaj qhov sib npaug ntau dua.
Txawm li cas los xij, muaj kev sib tw. Lub grinder cov hniav thiab cov khoom sib tsoo tuaj yeem hnav sai sai, tshwj xeeb tshaj yog nrog kev siv hnyav, yuav tsum tau hloov thiab tu. Kev sib tsoo tsis raug tuaj yeem ua rau cov khoom noj khoom haus thiab khoom noj khoom haus tsis txaus. Tsis tas li ntawd, xyuas kom lub grinder yog calibrated kom ua tau raws li qhov xav tau particle loj yog qhov tseem ceeb rau kev pom cov tsiaj zom thiab kev loj hlob.
Hauv kev xaus, tus tsiaj pub grinder yog cov khoom noj khoom haus alchemist rau cov tsiaj nyeg. Tab sis, kev saib xyuas ceev faj, ua haujlwm kom raug, thiab ntsuas qhov ntsuas yog qhov tseem ceeb rau kev ua kom nws cov txiaj ntsig zoo tshaj plaws thiab ua kom cov tsiaj muaj txiaj ntsig zoo.