Lub hnab ntim khoom tau siv dav. Peb yuav sau cov teb uas nws siv. Peb cia siab tias peb muaj kev nkag siab zoo ntawm cov thawv ntim khoom. Lub hnab ntim tau yooj yim tau siv dav, tshwj xeeb tshaj yog rau ntim cov cement ntau thiab cov khoom siv tshuaj lom neeg, pub, hmoov txhuv nplej siab, cov zaub mov (xws li hmoov), cov khoom, thiab cov khoom txaus ntshai (xws li calcium carbide). Kev thauj khoom, tshem tawm, kev thauj mus los, thiab khaws cia yog yooj yim heev.
Tam sim no, cov khoom siv lub hnab yog nyob rau theem kev loj hlob, tshwj xeeb tshaj yog cov khoom siv pallet zoo li ntau, thiab cov hnab ntim tau nrov dua. Raws li kev ntim khoom, lub hnab ntim khoom yuav tsum xyuas kom meej tias cov khoom xa tawm tau zoo thauj khoom thiab thauj khoom thaum thauj khoom, tshem tawm, thauj, thiab khaws cia thiab cov khoom thauj mus rau qhov chaw zoo. Lub hnab ntim khoom yog ib hom kev thauj mus los yooj yim ntim ntim.
Dav siv nyob rau hauv kev thauj mus los thiab ntim cov hmoov, granular, thiab blocky khoom xws li zaub mov, nplej, tshuaj, tshuaj lom neeg kev lag luam, thiab minerals. Lub hnab ntim khoom yog siv rau kev thauj mus los hauv lub tebchaws vam meej. Kev khaws cov khoom ntim hauv ob peb xyoos tom ntej no, nrog kev txhim kho ntawm ib puag ncig kev paub, lub hnab ntim khoom yuav siv ntau dua thiab siv ntau dua hauv kev lag luam hauv tsev thiab txawv teb chaws.
Kev ua lag luam kev cia siab yuav zoo heev, uas muab txoj hauv kev rau kev tsim cov thawv ntim khoom. Lub hnab ntim khoom yog siv dav hauv ntau yam. Nws cia siab tias nrog kev txhim kho txuas ntxiv ntawm lub zog thiab kev ua haujlwm zoo, cov thawv ntim khoom yuav coj peb cov txiaj ntsig kev lag luam ntau dua.
