Study of the process of rhenium extraction from lead slime

F.A. Berdikulova; A.T. Ikhlasova

doi:10.31643/2020/6445.23

Authors

F.A. Berdikulova Al-Farabi Kazakh National University, Almaty, Kazakhstan
A.T. Ikhlasova Al-Farabi Kazakh National University, Almaty, Kazakhstan

DOI:

https://doi.org/10.31643/2020/6445.23

Keywords:

lead sludge, oxidative roasting, calcium perrenate, water leaching, degree of extraction.

Abstract

This article studies the oxidative firing process of lead sludge of copper production for the purpose of extracting rhenium. As an oxidizer, calcium hypochlorite is used, which is simultaneously an oxidizer of low-valent rhenium compounds and a binding reagent of rhenium oxides to calcium perrenate. Optimal conditions for the firing process are found: the firing temperature is 500-600°C, the firing duration is 30-60 minutes, and the oxidizer consumption is 20-40 % of the sludge mass. As a result of thermal studies and experimental work, it was established that the rhenium oxidation process begins at 180-260 °C after the decomposition of calcium hypochlorite and completely ends at 500-600 °C with the formation of calcium perrenate. During water leaching of the stub under the following conditions: T: W=1: 3, temperature of 70 °C, duration of 60 minutes, a solution containing 546 mg/l of rhenium was obtained. The degree of rhenium recovery in the solution was 93-94 %.

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Author Biographies

F.A. Berdikulova, Al-Farabi Kazakh National University, Almaty, Kazakhstan

PhD, Department of technology of metals and minerals of chemistry and chemical technology faculty, Al-Farabi Kazakh National University at the RSE “The National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan”, Almaty, the Republic of Kazakhstan.

A.T. Ikhlasova, Al-Farabi Kazakh National University, Almaty, Kazakhstan

Master student, Department of technology of metals and minerals of chemistry and chemical technology faculty at Al- Farabi Kazakh National University at the RSE “The National Center on Complex Processing of Mineral Raw Materials of the Republic of Kazakhstan”, Almaty, Kazakhstan.

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