Task: Translation
Input (Czech): Zp sob obsahuje n sleduj c  kroky: (i) vytv °en  suspenze zdroje zne iÜt n ho miner lu ve vod , (ii) podroben  suspenze mlet  s mlec m prost°ed m maj c m m rnou hmotnost nejv²Üe rovnou 2,0 g.cm.sup.-3.n., p°i em  mno stv  energie rozpt²len  v suspenzi b hem operace mlet  je nejv²Üe 50 kWh na jednu tunu such ho zdroje zne iÜt n ho miner lu, a (iii) podroben  mlet ho zdroje zne iÜt n ho miner lu takov mu odd lov n  stic podle velikosti, e v podstat  vÜechny stice maj c  ekvivalentn  sf rick² pr m r v tÜ  ne  po adovan  maxim ln  velikost jemn ho miner ln ho produktu se odstra uj , p°i em  se izoluje od umlet ho zdroje zne iÜt n ho miner lu pod l stic, obsahuj c  zv²Üen  mno stv  jemn ho miner ln ho produktu ve srovn n  se stejn²m pod lem odd len²m z nerozemlet ho zdroje zne iÜt n ho miner lu.\
Output (English): There is described a process for the isolation of a fine mineral product from a low-grade source of the said mineral, the process comprising the following steps: (i) forming a suspension in water of the said mineral source; (ii) subjecting the suspension to grinding with a grinding medium having a specific gravity not greater than 2.0 cme3, whereby the amount of energy dissipated in the suspension during the grinding operation being not greater than 50 kw.hrs per one ton of the dry mineral source; and (iii) subjecting the polluted ground mineral source to such separating of particles to such a size thereof that substantially all the particles having equivalent spherical diameter greater than the required maximum particle size are removed and isolating from the ground suspension a fine fraction of particles comprising an increased amount of the said mineral when compared with the same fraction isolated from the unground polluted mineral source.