Extraction of arsenic from fine dust of copper smelters by reduction roasting with natural gas
Dosmukhamedov N. Takishov A. Zholdasbay E. Argyn A.
December 2024BioMed Central Ltd
Sustainable Environment Research
2024#34Issue 1
One of the current trends in the complex processing of fine dust from copper smelters is their direct leaching with sulfuric acid. As practical results show, high reliable technological parameters are not achieved due to the high content of arsenic in dust. During sulfuric acid leaching of dust, arsenic is distributed between the lead cake and the solution at a ratio of 40 and 60%, respectively. The redistribution of arsenic between leaching products significantly reduces the technological performance and leads to the accumulation of arsenic in the technological scheme. The paper presents the results of comprehensive studies of the elemental and phase composition of fine dust from one of the copper smelters in Kazakhstan. In the initial dust, along with the main phases presented in the form of lead and zinc sulfate, the following typical components were found: oxides of copper, lead, zinc and copper and zinc ferrites. Arsenic is found in two forms—As(III) and As(V). The laboratory installation and technique for conducting reduction roasting of dust with natural gas are presented. The influence of roasting duration, temperature and natural gas consumption on the extraction of arsenic from dust was studied. It has been established that almost complete, up to 99%, extraction of arsenic from dust is achieved with optimal technological roasting parameters: duration τ = 40 min.; natural gas consumption is 1.5 times higher than the stoichiometrically required amount for the reduction of As2O5, and temperature 500 °C.
Arsenic , Duration , Extraction , Fine dust , Natural gas , Reduction roasting , Sublimation , Temperature
Text of the article Перейти на текст статьи
Department of Metallurgy and Mineral Processing, Satbayev University, Almaty, 050000, Kazakhstan
Department of Mining, Metallurgy and Natural Sciences, Zhezkazgan University Named After O.A. Baikonurov, Zhezkazgan, 100600, Kazakhstan
Department of Metallurgy and Mineral Processing
Department of Mining
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026