Санкт-Петербургский горный университет, Санкт-Петербург, РФ

Гордеев Д. В., аспирант, danya.gordeev.2014@mail.ru

Петров Г. В., профессор, д-р техн. наук, доцент каф. металлургии

Nietz Technologies, Санкт-Петербург, РФ

Фоменко И. В., генеральный директор, канд. техн. наук

Шнеерсон Я. М., директор по науке и развитию, д-р техн. наук, профессор

Представлена разработка способа снижения сорбционной активности углеродистого вещества (УВ), который заключается в стимулировании окисления и пассивации его поверхности в ходе автоклавного окисления (АО) под действием вторичного окислителя. Проведено исследование по оценке принципиальной возможности использования азотной кислоты в качестве вторичного окислителя при АО золотосодержащих концентратов двойной упорности. Добавка азотной кислоты в основном положительно влияет на ключевые параметры АО. Показано, что извлечение золота имеет прямо пропорциональную зависимость от содержания органического углерода. Полученные результаты доказали перспективность использования азотной кислоты в качестве окислителя/пассиватора поверхности УВ. Метод позволит минимизировать потери золота, связанные с автоклавным и цианидным прегроббингом. Предложенная технология может быть успешно применена на современных автоклавных предприятиях без существенных капитальных затрат.

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