jul 24, 2021 machinery for rock mineral processing industry - crusher plant. r-techno is a leading manufacturer in mining and mineral processing equipment. it offers a complete range of products like crushing, screening, grinding, sand making and washing, mineral handling plant, and mineral washing plant equipment.,gold ore processing plant manufacturer gold mining,jiangxi hengchang mining machinery manufacturing company is mainly for making rock gold mining machines, alluvial gold washing plants, rock gold flotation machines. the followings are our main products. 1. crushers jaw crusher / hammer mill / hammer crushers. 2. grinding mill ball mill / gold wet pan mill 3.