Ushbu tadqiqotda “Olmaliq KMK” AJ Mis eritish zavodida texnologik gazlarni yuvish natijasida hosil bo‘lgan texnogen eritmalardan disprosiy (Dy), molibden (Mo) va tellur (Te) kabi noyob metallarni selektiv ajratib olish imkoniyatlari termodinamik asosda baholandi. Har bir metall uchun potensial–pH (E–pH) diagrammalari FactSage dasturi yordamida shakllantirildi va barqaror fazalar aniqlandi. Tahlillar Dy ni ishqoriy muhitda (pH>7,5) Dy₂O₃ shaklida, Te ni oksidlovchi neytral sharoitda (pH=5–8, E=0,5–0,7 V) TeO₂ ko‘rinishida va Mo ni pH=5–9 oralig‘ida (E=0,0–0,5 V) MoO₂ sifatida ajratish mumkinligini ko‘rsatdi. Har bir element uchun cho‘kma faza xususiyatlari va raqobatdosh ionlarning ta’siri o‘rganilib, selektiv ajratish uchun optimal sharoitlar belgilandi. Xususan, niqoblovchi reagentlar (EDTA, sitrat) yordamida Dy ning selektivligi oshirilishi, oksidlovchi kuchni boshqarish orqali Te ni birinchi bosqichda ajratish, hamda fazaviy farqlardan foydalanib Mo ni boshqa metallar fonida cho‘ktirish mumkinligi asoslab berildi. Tadqiqot natijalari texnogen eritmalardan iqtisodiy jihatdan ahamiyatli komponentlarni samarali ajratib olish va chiqindisiz texnologiyalarni ishlab chiqish yo‘nalishida muhim ahamiyat kasb etadi.
Ushbu tadqiqotda “Olmaliq KMK” AJ Mis eritish zavodida texnologik gazlarni yuvish natijasida hosil bo‘lgan texnogen eritmalardan disprosiy (Dy), molibden (Mo) va tellur (Te) kabi noyob metallarni selektiv ajratib olish imkoniyatlari termodinamik asosda baholandi. Har bir metall uchun potensial–pH (E–pH) diagrammalari FactSage dasturi yordamida shakllantirildi va barqaror fazalar aniqlandi. Tahlillar Dy ni ishqoriy muhitda (pH>7,5) Dy₂O₃ shaklida, Te ni oksidlovchi neytral sharoitda (pH=5–8, E=0,5–0,7 V) TeO₂ ko‘rinishida va Mo ni pH=5–9 oralig‘ida (E=0,0–0,5 V) MoO₂ sifatida ajratish mumkinligini ko‘rsatdi. Har bir element uchun cho‘kma faza xususiyatlari va raqobatdosh ionlarning ta’siri o‘rganilib, selektiv ajratish uchun optimal sharoitlar belgilandi. Xususan, niqoblovchi reagentlar (EDTA, sitrat) yordamida Dy ning selektivligi oshirilishi, oksidlovchi kuchni boshqarish orqali Te ni birinchi bosqichda ajratish, hamda fazaviy farqlardan foydalanib Mo ni boshqa metallar fonida cho‘ktirish mumkinligi asoslab berildi. Tadqiqot natijalari texnogen eritmalardan iqtisodiy jihatdan ahamiyatli komponentlarni samarali ajratib olish va chiqindisiz texnologiyalarni ishlab chiqish yo‘nalishida muhim ahamiyat kasb etadi.
В данной работе на термодинамической основе оценена возможность селективного разделения редких металлов, таких как диспрозий (Dy), молибден (Mo) и теллур (Te), из техногенных растворов, образующихся в результате промывки технологических газов на медеплавильном заводе АО «Алмалыкский ГМК». С помощью программы FactSage построены диаграммы потенциал–рН (E–pH) для каждого металла и выявлены устойчивые фазы. Анализы показали, что Dy может быть разделен в щелочной среде (pH>7,5) в виде Dy₂O₃, Te в окислительно-нейтральной среде (pH=5–8, E=0,5–0,7 В) в виде TeO₂, а Mo в диапазоне pH=5–9 (E=0,0–0,5 В) в виде MoO₂. Для каждого элемента изучены свойства осажденной фазы и влияние конкурирующих ионов, определены оптимальные условия селективного разделения. В частности, показано, что селективность Dy можно повысить, используя маскирующие реагенты (ЭДТА, цитрат), Te можно отделить на первой стадии, контролируя окислительную способность, а Mo можно осадить на фоне других металлов, используя фазовые различия. Результаты исследований имеют большое значение в направлении эффективного выделения экономически важных компонентов из техногенных растворов и разработки безотходных технологий.
In this study, the possibility of selective separation of rare metals such as dysprosium (Dy), molybdenum (Mo) and tellurium (Te) from technogenic solutions formed as a result of washing process gases at the copper smelter of the Almalyk MMC JSC was evaluated on a thermodynamic basis. Potential–pH (E–pH) diagrams for each metal were generated using the FactSage program, and stable phases were identified. The analyses showed that Dy could be separated in an alkaline medium (pH>7.5) as Dy₂O₃, Te in an oxidizing neutral environment (pH=5–8, E=0.5–0.7 V) as TeO₂, and Mo in the pH range 5–9 (E=0.0–0.5 V) as MoO₂. The properties of the precipitated phase and the effect of competing ions were studied for each element, and the optimal conditions for selective separation were determined. In particular, it was demonstrated that the selectivity of Dy can be increased by using masking reagents (EDTA, citrate), Te can be separated in the first stage by controlling the oxidizing power, and Mo can be precipitated against the background of other metals using phase differences. The results of the research are of great importance in the direction of efficient separation of economically important components from technogenic solutions and the development of waste-free technologies.
| № | Author name | position | Name of organisation |
|---|---|---|---|
| 1 | Xudoymuratov S.J. | Assistent | Toshkent Davlat texnika universiteti Olmaliq filiali |
| 2 | Hojiyev S.T. | PhD | Toshkent Davlat texnika universiteti Olmaliq filiali |
| 3 | Karshiboyev S.B. | PhD | Toshkent Davlat texnika universiteti Olmaliq filiali |
| 4 | Mutalibxonov S.S. | Assistent | Toshkent Davlat texnika universiteti Olmaliq filiali |
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