PROCESS FOR PRODUCING MONOMINERAL CONCENTRATES OF TITANIUM, ZIRCONIUM, RARE EARTHS, GOLD-SILVER AND QUARTZ SAND FROM COARSE BALLAST-PIT SAND

摘要

the invention relates to a process to obtain coarse sands gravel pit (fraction of 5 mm) monominerale zircon concentrates, rare earths, titanium, silver, gold and sand cuarţos,in the fields of metallurgy, steel usable, ceramics and other fields.the technical solution is that coarse sand (5 mm), containing heavy minerals, is prepared in wet and dry,for heavy mineral concentration to preconcentrate and useful and înnobilarea steriului cuarţos through closing phases 3 and 1.6 mm,the separation hidrogravitaţională spirals in four steps (primary 1 and 2 enrichment, separation, cleaning) hidrogravitaţională on mass concentration (mayor, wet magnetic separation at h = 8000 oe),in two steps (primary cleaning), desecare, drying and heating to 150° c, followed by electrical separation at u = 40 kv, t = 150° c, d = 6.5 cm.in four steps (primary enrichment - cleansing 1-2), dry magnetic separation in field intensity average h = 900 - 8000 oe, in two steps (primary cleaning)dry magnetic separation to 900 oe, in a dry magnetic separation step, h = 17000 oe, in four steps (primary cleaning 1, 2, and 3) and ranking at 0100 mm.