2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2022.60 pmi-15807 https://pmi.spmi.ru/pmi/article/view/15807 Металлургия и обогащение Metallurgy and concentration In-situ leaching of molybdenum and uranium by percarbonate and chloride-hypochlorite solutions Подземное выщелачивание молибдена и урана с использованием перкарбонатных и хлоридно-гипохлоритных растворов Rasskazov Igor Yu. Рассказов И. Ю. Rasskazov Igor Yu. rasskazov@igd.khv.ru 0000-0002-2215-6642 Хабаровский Федеральный исследовательский центр ДВО РАН (Хабаровск, Россия) Khabarovsk Federal Research Centre, Far Eastern Branch of the Russian Academy of Sciences (Khabarovsk, Russia) Sekisov Artur G. Секисов А. Г. Sekisov Artur G. sekisovag@mail.ru 0000-0001-5780-6150 Институт горного дела ДВО РАН (Хабаровск, Россия) Mining Institute, Far Eastern Branch of the Russian Academy of Sciences (Khabarovsk, Russia) Rasskazova Anna V. Рассказова А. В. Rasskazova Anna V. annbot87@mail.ru 0000-0002-6998-8120 Институт горного дела ДВО РАН (Хабаровск, Россия) Mining Institute, Far Eastern Branch of the Russian Academy of Sciences (Khabarovsk, Russia) 03 11 2022 2022 256 623 631 14 04 2022 21 07 2022 03 11 2022 © 2022 И. Ю. Рассказов, А. Г. Секисов, А. В. Рассказова © 2022 Igor Yu. Rasskazov, Artur G. Sekisov, Anna V. Rasskazova 2022 И. Ю. Рассказов, А. Г. Секисов, А. В. Рассказова Igor Yu. Rasskazov, Artur G. Sekisov, Anna V. Rasskazova Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/15807

Подземное выщелачивание молибдена и урана становится все более распространенным процессом. Рассмотрены особенности вещественного состава руд, приводящие к снижению их фильтрационных характеристик. Исследованы процессы активационного выщелачивания рабочими растворами, прошедшими электрофотохимическую активацию до контактирования с рудной массой. Активационная подготовка выщелачивающих растворов способствует синтезу кластеризованных молекул воды с коллективизированными протонами и гидроксил-ионами, а также активных форм кислорода и водорода. Проведены экспериментальные исследования кюветного выщелачивания молибдена из лежалых хвостов Шахтаминского месторождения. После предокисления активным карбонатным раствором проведено модельное скважинное выщелачивание хлоридно-гипохлоритным раствором. Извлечение молибдена на смолу составило 85 % за 30 сут. В экспериментах по перколяционному выщелачиванию урана из руд месторождений Учкудук и Сугралы подтверждена потенциальная возможность существенного повышения извлечения урана электрофотоактивированными перкарбонатными растворами относительно водных растворов карбоната натрия и аммония. При выщелачивании карбонатными растворами без дополнительного окислителя извлечение урана из пробы руды месторождения Сугралы составляло 52 и 59 % (карбонатом натрия и карбонатом аммония). Использование пероксида водорода в качестве окислителя позволило достичь его 87-88 % извлечения в продуктивные растворы за 21 день без предварительного предокисления. Выполненные исследования подтверждают технологическую возможность извлечения урана и молибдена методами перколяционного выщелачивания в колоннах и скважинного выщелачивания.

In-situ leaching of molybdenum and uranium is becoming an increasingly common process. The features of the material composition of ores, leading to a decrease in their filtration properties, were considered. Activation leaching with leaching solutions that have undergone electrophotochemical activation before contact with the ore mass were studied. Activation preparation of leaching solutions promotes the synthesis of clustered water molecules with collectivized protons and hydroxyl ions, as well as active forms of oxygen and hydrogen. Cell leaching of molybdenum from mature tailings of the Shakhtaminsk deposit was studied experimentally. After pre-oxidation with an active carbonate solution, a model borehole leaching was carried out with a chloride-hypochlorite solution. Molybdenum extraction on resin a was 85 % in 30 days. Experiments on the percolation leaching of uranium from the ores of the Uchkuduk and Sugraly deposits confirmed the potential possibility of a significant increase in the extraction of uranium by electrophotoactivated percarbonate solutions relative to aqueous solutions of sodium and ammonium carbonate. When leaching with carbonate solutions without an additional oxidizing agent, the extraction of uranium from the Sugraly deposit ore sample was 52 and 59 % (sodium carbonate and ammonium carbonate). The use of hydrogen peroxide as an oxidizing agent made it possible to achieve 87-88 % extraction into pregnant solutions in 21 days without pre-oxidation. The performed studies confirm the processing capability of extracting uranium and molybdenum by percolation leaching in columns and borehole leaching.

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