... A ball mill, a type of ,is a cylindrical device used to grind (or mix) materials like ores,chemicals ... millBall mill,a kind of horizontal drum-type rotating device, is a grate mill withexternal gear and double bins ... shall be evenly charged through quill shaft in feeding device into the first bin, which hasstep or waved lining ... .527<=250.074-0.49-4528048.5 Energy Saving 300 TPD Cement Plant Ball Mill