Umthengisi weThiourea eMzantsi Afrika

Yintoni iThiourea?

I-Thiourea (CH₄N₂S, okanye (NH₂)₂CS) yi-organosulfur compound enxulumene ne-urea, apho ioksijini ithathelwa indawo yisulfure. Kwi-metallurgy yegolide nesilivere, i-thiourea isetyenziswa njenge-leach reagent eyahlukileyo kwi-cyanide (NaCN). Kwisisombululo se-acidic (pH 1–2) xa kukho i-oxidant (ngesiqhelo i-ferric sulfate), i-thiourea yenza i-stable thiourea-gold complex [Au(Tu)₂]⁺ evumela igolide ukuba inyibilike kwi-ore. I-Thiourea leaching isebenza kwi-pH ephantsi (iimeko ze-acidic), ngokungafaniyo ne-cyanidation (i-alkaline), okwenza ukuba ibe nomtsalane ngakumbi kwiintlobo ze-ore apho iimeko ze-alkaline zinengxaki, okanye apho kuye kwasetyenziswa i-acidification yangaphambi konyango.

Isicelo kwi-Refractory kunye ne-Complex Ores

Iingenelo eziphambili ze-thiourea kune-cyanide leaching kukusebenza kwayo kwi-ore zegolide ezingafunekiyo ezine-arsenic ephezulu, i-antimony, okanye i-telluride apho i-cyanide leaching icotha okanye ingasebenzi kakuhle; ii-ore ezine-copper mineral content ephezulu ezitya i-cyanide eninzi; kunye ne-carbonaceous ore apho i-preg-robbing (ukufunxwa kwe-gold cyanide complex kwizinto ze-carbonaceous) kuthintela ukubuyiswa kwe-cyanide. I-Thiourea leaching ye-ore ezinjalo kwiimeko ze-asidi inokufezekisa ukubuyiswa kwegolide okwamkelekileyo ngamaxesha amafutshane e-leach xa kuthelekiswa ne-cyanide. I-Thiourea ikwanobuthi obuphantsi kakhulu kune-cyanide, nangona isafuna ukuphathwa ngokunenkathalo kunye nolawulo lokulahla.

Ezinye ii-Aplikheshini zoShishino

Ngaphandle kwegolide eyongeziweyo, i-thiourea isetyenziswa kwiibhafu zokulungisa imifanekiso, njenge-accelerator kwi-vulcanisation, ekuhlanganiseni amayeza kunye needayi, kwaye njenge-corrosion inhibitor kunye ne-metal surface brightener kwi-copper kunye ne-silver electroplating. I-Terracore Chemicals inikezela nge-thiourea kudidi lobuchwephesha kwimigodi nakwiindawo zoshishino.