Lub peev xwm tsim tau txhua xyoo ntawm ntau hom ziab, granulating, crushing, sib tov, concentrating thiab extracting khoom ncav cuag ntau tshaj 1,000 poob lawm (poob). Rotary nqus tshuab ziab khaub ncaws (iav-lined thiab stainless hlau hom) muaj qhov tshwj xeeb zoo.