Ways of the lead-bearing slag waste utilization

Turebekova, Gaukhar; Akhmetova, Saule Ospandiyarovna; Bagova, Z.

doi:10.1051/e3sconf/202126204003

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Lead-containing slag is the intermediate product of the lead smelting process and contains Pb and Zn. The Pb concentration continues to decrease with smelting progress, so Pb slag is divided into low-lead slag and high-lead slag [1][2][3][4]. Pb and Zn are easily converted into volatile substances such as PbO(g), Zn(g) under reasonable conditions [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Tang,

Zhao

2024

Materials

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According to physical property tests of lead-containing slag, the volatilisation behaviour of lead slag will have adverse impacts on test accuracy and further affect the control of chemical reactions, solidification and removal of inclusions during smelting. To analyse the volatilisation characteristics of lead slag, in this paper, four kinds of lead slags from lead direct reduction smelting with different PbO and ZnO content are taken. thermogravimetry, ISP-TOF were used. Additionally, the changes in volatiles and slag composition and phases were analysed with XRD and ICPS, and the volatilisation reaction mechanism was discussed. The results indicated that the volatilisation of lead slag can lead to a big weight loss of about to the slag with higher PbO content. The weight loss increases with the PbO content in slag increases. The volatile corresponding to the weight loss above 900 °C is mainly PbO and less ZnO. The higher the temperature is, the stronger the volatilisation is. With the increase in temperature and keeping time, most of the PbO can be evaporated and leaves little PbO in the residual slag. This will has great effect to physico-chemical property measurement of the slag with higher PbO content, especially to the property measurement that be kept at high temperature for a long time. Because the volatiles is trend to condense with the temperature decrease, mass spectrometer is limited by the condensation of volatiles, i.e., PbO, ZnO and so on, in the connection pipeline. The device should be modified for this use.

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Section: Introductionmentioning

confidence: 99%

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Tang,

Zhao

2024

Materials

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“…In 2011, due to various economic reasons, Shymkent Plumbum Factory was decisively closed. Nevertheless, the environmental situation of the city is as before negatively exerted by collected slag residuals to the number of 2 million tons kept in outdoor storings under the action of atmospheric precipitates, aerial oxygen and sun rays [1]. The plumbum factory slags are important crude materials containing various non-ferrous metals, currently non-ferrous metals obtained from secondary crude materials play an important role in overall balance of non-ferrous metals' production and consumption in Kazakhstan: their share with regard to the total non-ferrous metal production is about 25% [2].…”

Section: Introductionmentioning

confidence: 99%

Investigation of plumbum-containing slags and ways for their reclaiming

Bagova,

Turebekova,

Rodrigo-Ilarri

et al. 2023

EJSU

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The paper deals with analysis and findings of investigation of technogenic plumbum-zinc slag residuals that involve a great deal of poisonous compounds such as cadmium, osmium, plumbum, zinc, hazardous origins of environmental contamination. In connection with the outdoor storing of slags, an excess of the plumbum critical concentration was derived. Technogenic slag residuals' reclamation is crucial for minimizing the detrimental effect on health and safety, improving the region's ecological setting. At that, slags are high-value crude materials involving rare-earth and non-ferrous metal compunds. The paper demonstrates the findings of laboratory tests of slags to specify the quantitative and qualitative composition of highvalue components in the plumbum residuals, the ability of their subsequent treatment and reclamation. The heavy slag fraction material was investigated on JEOL IXA-8230 Electron Probe microanalyzer. The running slag sample's X-ray diffraction analysis was carried out on DRON-4 diffractometer with graphite monochromator, Cu radiation. Heavy fractions were separated from the samples, artifactural polished microsections (briquets) were made. The polished microsections were investigated in index-matching fluids and under LEICA DM 2500P microscope. The findings identified that plumbum slags involve a considerable body of non-ferrous metal compounds, which allow to make the reclamation of poisonous plumbum residuals functional and cost-effective.

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Development of Mineral Fillers for Acid-Resistant Filling Composites

Kalimoldina,

Abilkasova,

Akhmetova

et al. 2024

J. Compos. Sci.

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This article presents the results of research on the development of chemically resistant polymer–mineral casting composites based on industrial waste. The aim of this work is to develop a technological basis for obtaining effective inorganic fillers and highly filled composites for use in chlorine-containing environments. On the basis of theoretical data, mineral fillers and a polymer binder for filling composites were selected, optimal quantities of input hardeners and an appropriate thermal curing mode were determined, and the influence of the filling degree on the properties of composites was studied. The influence of various factors on the properties of the obtained composites was also studied, and the possibility of using local raw materials to obtain special-purpose composites was investigated. Ash from a thermal power plant (TPP) was used as an acid-resistant filler in composites. Two components were chosen as binders: phenol formaldehyde resin and mineral filler (TPP ash). As the third component, hydrolytically active fillers—anhydrite, phosphogypsum and phosphate slag—were used. The degree of filling has a significant influence on the properties of composites, including the compressive strength, chemical resistance and degree of curing, the values of which were elucidated across a wide range of composite variations based on the degree of filling. The conducted research allowed us to establish the limit of admissible anhydrite content, which should not exceed 15 mas.%. To optimize the chemical resistance and durability of the composites of the investigated substances, the method of mathematical planning was used. According to the results of this study, the optimal compositions of composites, in terms of anhydrite, phosphogypsum and phosphorus slag contents, were selected. At the maximum possible degree of filling, these composites exhibit high target characteristics.

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Ways of the lead-bearing slag waste utilization

Cited by 3 publications

References 2 publications

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Volatilisation Behaviour and Mechanism of Lead-Containing Slag during Physical Property Tests

Investigation of plumbum-containing slags and ways for their reclaiming

Development of Mineral Fillers for Acid-Resistant Filling Composites

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