Biooksidlash jarayonida oksidlash darajasini oshirish maqsadida flotokonsentratning qumlik fraksiyasini oldindan maydalash taklif qilingan. Flotokonsentrat zarralarning maydalanishi bilan bioishqorlash tezligi ancha oshib va sianlash orqali chiqarish oshadi. Olingan natijalar shuni kursatdiki, mayda fraksiya ko ׳payishi biooksidlash jarayonida oksidlash jarayonini ko ׳tarilishiga va sorbsiya chiqindilarida asosiy elementning pasayishiga olib keladi.

Tayanch iboralar: mineralogik tarkib, tirgak mineral xom-ashyo, nodir metallarning qazib olish klassik uslubi, birlashtirilgan texnologiya, flotatsiya jarayoni, qumlik fraksiya, maydalash, flotokonsentratning fizik-mexanik xossalari, granulometrik tarkib, bioishqorlash, tsianlash.

For increase the degree of oxidation in the process of bio-oxidation, proposed a sand fraction was subjected to flotation concentrate regrinding. With decreasing particle size flotation concentrate bioleaching significantly increased speed and increased extraction by cyanidation. Tests have been conducted on the biooxidation flotation concentrates with a different grain size distribution. The results showed that an increase in the share of fine fractions lead to higher oxidation states during the bio-oxidation and decrease the content of the main element in the tails sorption.

Key words: mineralogical composition, resistant mineral raw materials, the classical method of extracting precious metals, combined technology, flotation process, sand fraction, regrinding, physico-chemical properties of the flotation concentrate,grain size, bioleaching, cyanidation.