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19. Processing of Sb-Pb-Sn-Containing Materials

Author

Timofeev, K. L., Korolev, A. A., Maltsev, G. I., Timofeev, K. L., Korolev, A. A., and Maltsev, G. I.

Abstract

During the processing of lead containing products and polymetallic alloys the recovery of tin and antimony from technology of lead production is carried out by oxidation refining of decopperized lead with rich oxides (Sn, Sb ≥ 20%).Tin oxides are melted in a short-drum furnaces to lead bullion (> 96% Pb) and tin-rich (> 20% Sn) slag. The slag is melted in an ore-smelting furnace to obtain a Sn-Pb alloy of next composition, %: 56.1 Sn, 18.2 Pb, 14.6 Sb, 6.9 As, which is refined by vacuum distillation with production of rough tin (Sn ≥ 90%). The additional profit of rough tin obtainment (∼310 tons/year), compared with sales of tin slag, is about ∼1.3 million $/year.

Published
2020

20. Development of Technology of Arsenic Removal from Acidic Waste Solutions in the Form of Arsenic Trisulfide

Author

Grebneva, A. A., Subbotina, I. L., Timofeev, K. L., Maltsev, G. I., Grebneva, A. A., Subbotina, I. L., Timofeev, K. L., and Maltsev, G. I.

Abstract

During the laboratory tests the conditions of arsenic removal from acidic waste solutions of metallurgical enterprise in the form of arsenic trisulfide were determined. The technology based on the reduction of pentavalent arsenic to trivalent state with sodium pyrosulfite solution and following arsenic trisulfide precipitation from acidic solution after treatment with sodium sulfide solution was proposed. The arsenic removal proceeds with mechanical stirring, dosing the calculated amounts of reagents and collecting emissions of hydrogen sulfide. With such treatment, about 95% of arsenic, which was in the initial solution, passes into the precipitate. An enlarged laboratory experiment was carried out and the precipitate with 42.6% of arsenic and 46.9% of sulfur was obtained. The precipitate yield was ∼25.7 kg (dry weight) out of 1 m3 of the initial arsenic containing solution.

Published
2020

22. Indium extraction from solutions with modified aluminosilicates

Author

Timofeev, K. L., Maltsev, G. I., and Sviridov, A. V.

Subjects
MONTMORILLONITE, ALUMINOSILICATES, МОНТМОРИЛЛОНИТ, IRON, ИНДИЙ, SORPTION, СОРБЦИЯ, ZINC, INTERCALATION, АЛЮМОСИЛИКАТ, ЦИНК, ЖЕЛЕЗО, ИНТЕРКАЛЯЦИЯ, INDIUM
Abstract

The aim of this work was to study the adsorption of indium from aqueous solutions on modified highly dispersed aluminosilicates for the recovery of indium from technological solutions. The adsorption isotherms of indium, iron and zinc from multi component solutions on modified by di(2-ethylhexyl) phosphoric acid montmorillonite were obtained. It was shown that adsorption processes can be reliably described by models of Langmuir and Freundlich (R-2 = 0.96-0.99). The shape of the isotherms is determined both by the surface properties of the sorbent and forms of presence of metal ions in aqueous solutions. The highest value of Langmuir constant Kads = 422.65 for reagent "Metosol" was obtained for ions of indium, which indicates the preferential affinity of the sorbing mineral to this element, since the corresponding figures for the ions Fe2+ (1.09) and Zn2+ (0.78) are close to unity. At sorption of metal ions from model solution in the range of acidity of 1-20 g/dm(3) of H2SO4 the extraction of indium remains unchanged at 70 %, and iron is reduced from 39 to 15% of the initial content. With the further increase of acidity to 100 g/dm(3) of H2SO4, the recovery of indium is reduced to 40 %; iron down to 14 %. In the examined range of concentration of sulfuric acid the extraction of zinc is from 6.0 to 7.5 percent. The value of the static exchange capacity for the studied metals are mmol/g: 0.39-0.23 of indium; 0.11-0.04 of iron(III); 0.05-0.04 of zinc. A rank of affinity of reagent "Metosol" to extract the metal ions from solution with pre-reduced iron(III) was In3+ > Fe2+ > Zn2+ which determines the feasibility of its use for the selective adsorption of indium from the complex composition of technological solutions of zinc production. Получены изотермы адсорбции индия, железа и цинка из поликомпонентных растворов на модифицированном ди(2-этил-гексил)фосфорной кислотой монтморилло- ните. Показано, что процессы адсорбции могут быть достоверно описаны с помощью моделей Ленгмюра и Фрейндлиха. Форма изотерм определяется как свойствами поверх- ности сорбента, так и формами нахождения ионов металлов в водных растворах. Установлен ряд сродства реагента «Метозоль» к извлекаемым ионам металлов из рас- твора с предварительно восстановленным железом(III): In3+ > Fe2+ > Zn2+, что обуслав- ливает целесообразность его использования для селективной сорбции индия из сложных по составу технологических растворов цинкового производства.

Published
2016

25. Извлечение индия из растворов высокодисперсными модифицированными алюмосиликатами

Author

Timofeev, K. L., Maltsev, G. I., Sviridov, A. V., Тимофеев, К. Л., Мальцев, Г. И., Свиридов, А. В., Timofeev, K. L., Maltsev, G. I., Sviridov, A. V., Тимофеев, К. Л., Мальцев, Г. И., and Свиридов, А. В.

Abstract

The aim of this work was to study the adsorption of indium from aqueous solutions on modified highly dispersed aluminosilicates for the recovery of indium from technological solutions. The adsorption isotherms of indium, iron and zinc from multi component solutions on modified by di(2-ethylhexyl) phosphoric acid montmorillonite were obtained. It was shown that adsorption processes can be reliably described by models of Langmuir and Freundlich (R-2 = 0.96-0.99). The shape of the isotherms is determined both by the surface properties of the sorbent and forms of presence of metal ions in aqueous solutions. The highest value of Langmuir constant Kads = 422.65 for reagent "Metosol" was obtained for ions of indium, which indicates the preferential affinity of the sorbing mineral to this element, since the corresponding figures for the ions Fe2+ (1.09) and Zn2+ (0.78) are close to unity. At sorption of metal ions from model solution in the range of acidity of 1-20 g/dm(3) of H2SO4 the extraction of indium remains unchanged at 70 %, and iron is reduced from 39 to 15% of the initial content. With the further increase of acidity to 100 g/dm(3) of H2SO4, the recovery of indium is reduced to 40 %; iron down to 14 %. In the examined range of concentration of sulfuric acid the extraction of zinc is from 6.0 to 7.5 percent. The value of the static exchange capacity for the studied metals are mmol/g: 0.39-0.23 of indium; 0.11-0.04 of iron(III); 0.05-0.04 of zinc. A rank of affinity of reagent "Metosol" to extract the metal ions from solution with pre-reduced iron(III) was In3+ > Fe2+ > Zn2+ which determines the feasibility of its use for the selective adsorption of indium from the complex composition of technological solutions of zinc production., Получены изотермы адсорбции индия, железа и цинка из поликомпонентных растворов на модифицированном ди(2-этил-гексил)фосфорной кислотой монтморилло- ните. Показано, что процессы адсорбции могут быть достоверно описаны с помощью моделей Ленгмюра и Фрейндлиха. Форма изотерм определяется как свойствами поверх- ности сорбента, так и формами нахождения ионов металлов в водных растворах. Установлен ряд сродства реагента «Метозоль» к извлекаемым ионам металлов из рас- твора с предварительно восстановленным железом(III): In3+ > Fe2+ > Zn2+, что обуслав- ливает целесообразность его использования для селективной сорбции индия из сложных по составу технологических растворов цинкового производства.

Published
2016

26. Reception of the strong platinized titanic anodes

Author

Vorontsova, T. E., Maltsev, G. I., Shpoltakova, I. A., and Lebed, A. B.

Subjects
546.92:546.82 [УДК 621.3.032.22], 546.82 [УДК 546.92], УДК 544.6.018.4, платинированный анод, серебро, the platinized anode, silver, electroextraction, affinage, электроэкстракция, аффинаж
Abstract

Рассмотрен способ изготовления малоизнашиваемых анодов из полупродуктов производства концентрата металлов платиновой группы посредством платинирования титановых матриц, удовлетворяющих условиям протекания электродных процессов в азотнокислых электролитах при электроэкстракции серебра в технологии аффинажа. The way of manufacturing strong anodes from semiproducts of manufacture of a concentrate of metals of platinum group, by means of platinization of the titanic matrixes, satisfying to conditions of course of electrode processes in nitrate electrolits is considered at electroextraction silver in technology affinage. Lebed Andrey Borisovich – PhD (Technical), The Chif of the Research Center of Open joint-stock company "Uralelectromed". 1, Lenin avenue, Verkhnaya Pyshma, Sverdlovsk Region, 624091. Лебедь Андрей Борисович – кандидат технических наук, начальник Исследовательского центра ОАО «Уралэлектромедь». 624091, Свердловская область, г. В. Пышма, ул. Ленина, 1. E-mail: mgi@elem.ru Shpoltakova Irina Aleksandrovna – The Process Engineer of the Research Center of Open joint-stock company "Uralelectromed". 1, Lenin avenue, Verkhnaya Pyshma, Sverdlovsk Region, 624091. Шполтакова Ирина Александровна – инженер-технолог Исследовательского центра ОАО «Уралэлектромедь». 624091, Свердловская область, г. В. Пышма, ул. Ленина, 1. E-mail: mgi@elem.ru Maltsev Gennady Ivanovich – Dr. Sc. (Technical), The Chief Specialist of the Research Center of Open joint-stock company "Uralelectromed". 1, Lenin avenue, Verkhnaya Pyshma, Sverdlovsk Region, 624091. Мальцев Геннадий Иванович – доктор технических наук, главный специалист Исследовательского центра ОАО «Уралэлектромедь». 624091, Свердловская область, г. В. Пышма, ул. Ленина, 1. E-mail: mgi@elem.ru Vorontsova Tatyana Evgenyevna – The Process Engineer of the Research Center of Open joint-stock company "Uralelectromed". 1, Lenin avenue, Verkhnaya Pyshma, Sverdlovsk Region, 624091. Воронцова Татьяна Евгеньевна – инженер-технолог Исследовательского центра ОАО «Уралэлектромедь». 624091, Свердловская область, г. В. Пышма, ул. Ленина, 1. E-mail: mgi@elem.ru Уралэлектромедь

Published
2012

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