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Название New slime depressant for potash ore flotation
DOI 10.17580/or.2023.04.02
Автор Konobeevskikh A. V., Titkov S. N., Aliferova S. N., Teleshev D. K.
Информация об авторе

VNII Galurgii JSC (Saint Petersburg, Russia):

Konobeevskikh A. V., Head of Laboratory, Aleksey.Konobeevskih@uralkali.com
Titkov S. N., Director of Technological Research Section, Candidate of Engineering Sciences, Stanislav.Titkov@uralkali.com
Teleshev D. K., Senior Researcher, Dmitriy.Teleshev@uralkali.com


PJSC Uralkali (Berezniki, Russia):

Aliferova S. N., Deputy Technical Director, Candidate of Engineering Sciences, Svetlana.Aliferova@uralkali.com


The main difficulties in the flotation of water-soluble salts include the presence of silicate-carbonate and sulphate easily slime-generating water-insoluble impurities. The slime formed in ore grinding has a high sorption capacity and therefore reduces sylvite floatability by actively sorbing the cationic collector (primary aliphatic amines). Slime contents as low as 0.2–0.4 wt% in sylvite flotation feed cause a significant deterioration in flotation performance and high cationic collector consumption. In order to eliminate the negative impact of insoluble impurities on the sylvite flotation process, the ore is preliminarily deslimed by the centrifugal gravity concentration or flotation methods, or a combination of both. With an aim to suppress the effects of the residual slime amounts, the sylvite flotation feed is then treated with an organic slime depressant. Various anionic polymers and oligomers are used as such a depressant, namely: starch, cellulose ethers, guar, tannides, and urea-formaldehyde resins (UFR). This article presents the performance data for using UFRs of various compositions. It provides the results of relevant laboratory and industrial tests with potash ore flotation using urea-formaldehyde resins of various compositions as slime depressants. Oligomer K-6 slime depressant has been developed and adopted for industrial use. It has a free formaldehyde content of not more than 0.5 % and ensures efficient sylvite flotation. Oligomer K-6 has been introduced for industrial use at the flotation plants of PJSC Uralkali.

Ключевые слова Potash ore, insoluble residue, sylvite flotation, slime depressant, free formaldehyde, cationic collector
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