Recycling of Chrome-Containing Waste from a Mining and Processing Plant to Produce Industrial Products

Tastanov, Yerbulat; Serzhanova, Nuriya; Ultarakova, Almagul; Sadykov, N. Kh.; Yerzhanova, Zh.A.; Tastanova, Aisha

doi:10.3390/pr11061659

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…When determining self-grinding, a mill was adopted, having: speed of rotation-80 rpm, working volume-5170 cm 3 , and working surface-1060 cm 3 . As an indicator of resistance to grinding, the value p was chosen, the reciprocal of self-grinding, and was equal to the difference in the amount of weight of the pellet sample remaining in the mill and dust.…”

Section: Resultsmentioning

confidence: 99%

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Research on the Production of Pigments Based on Composite Pellets in the Recycling of Industrial Waste

et al. 2023

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This article presents the complex processing of low-grade and substandard chromium ores, as well as sludge tailings, with the production of composite chromium-containing materials and pigments, while improving environmental performance in the Republic of Kazakhstan through the utilization and processing of technogenic raw materials. In this work, to study the physicochemical properties of the starting materials, modern analytical, thermodynamic, chemical, granulometric, as well as computational, mathematical, laboratory, and experimental methods were used. In particular, studies of a method for producing composite pellets for chromite pigments based on industrial technogenic waste of the Republic of Kazakhstan are presented. Based on the results of the experimental studies, composite pellets were obtained, having a compressive strength of 150–220 kg/pellet and containing 49.7% of chromium oxide and 0.5–1.0% of carbon in its composition. The resulting chromite pigment based on the composite pellets is a modification of chromium oxohydroxide with the formula γ-CrOOH. The density of the resulting pigment is 3.4 kg/m3. The chromite pigment based on the composite pellets is recommended for use in various coloring compositions, including using it for printing on cotton and mixed fabrics intended for sewing outerwear.

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Section: Resultsmentioning

confidence: 99%

“…Integrated processing of low-grade and substandard chromium ores, as well as sludge tailings, while improving environmental performance, dramatically increases the value of using non-traditional raw materials in factories for the production of composite chromiumcontaining products and pigments [3,4].…”

Section: Introductionmentioning

confidence: 99%

Research on the Production of Pigments Based on Composite Pellets in the Recycling of Industrial Waste

et al. 2023

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“…A sustainable material requires three main environmental characteristics: to be prepared from recycled materials including industrial wastes (in other words, to help diminish the dumps amount), to have a low carbon footprint or to help reduce CO 2 emissions and to be utilized for environmentally friendly applications [15,16]. Thus, a sustainable material design implies using a significant amount of industrial wastes (preventing their dumping) and ensures their further processing in an environmentally friendly manner.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Investigations Regarding Sustainable Recycling of Ceramic Slurry Collected from Industrial Waste Waters

Avram,

Barbu Tudoran,

Cuc

et al. 2024

Sustainability

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Ceramic slurry wastes have a significant hazardous potential when dumped. Their recycling as raw material is a sustainable approach for the development of nature-friendly applications. The microstructure and mechanical properties play a key role in the success of this sustainable recycling. Ceramic slurry samples resulting from the wall and floor tiles production facility were analyzed. The mineral composition was investigated by XRD combined with mineralogical microscopy and the microstructure was investigated by SEM microscopy coupled with EDX spectroscopy and elemental mapping. The ceramic slurry contains: quartz, kaolinite, mullite and small amounts of lepidocrocite. Quartz and mullite particles have sizes in the range of 5–100 μm and kaolinite has small particles of around 1 to 30 μm. Iron hydroxide crystallized as lepidocrocite is finely distributed among kaolinite aggregates. It makes the slurry unable to be reused in the technological process because of the glaze staining risk, but it does not affect the material cohesion. Thus, the cylindrical samples were prepared at progressive compactions rates as follows: 1808.55; 1853.46; 1930.79 and 2181.24 kg/m3 and dried. Thereafter, were subjected to a compression test with a lower compression strength of 0.75 MPa for lower density and a higher strength of 1.36 MPa for the higher density. Thus, slurry compaction enhances the kaolinite binding ability. The Young’s Modulus slightly decreases with the compaction increasing due to local microstructure rigidizing. This proves the binding ability of kaolinite, which properly embeds quartz and mullite particles into a coherent and resistant structure. The fractography analysis reveals that fracture starts on the internal pores at low compaction rates and throughout the kaolinite layer in the samples with high compactness. The observed properties indicate that the investigated ceramic slurry is proper as a clay-based binder for sustainable ecological buildings, avoiding the exploitation of new clay quarries. Also, it might be utilized for ecological brick production.

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“…Such wastes being a fine-dispersed product negatively affect the ecological situation in the region and in the case of their processing can be secondary mineral resources (so-called technogenic mineral deposits of chromium raw materials). In our previously published work [29] the results on gravitational enrichment of chrome tailings with obtaining of conditioned fine chrome concentrate are given. However, fine chromite concentrate cannot be used for smelting ferrochrome in AC electric arc furnaces, as it will lead to an increase in dust emission into the gas duct system of furnace units, which will increase the amount of circulating intermediate products.…”

Section: Introductionmentioning

confidence: 99%

Physical and Chemical Studies of Smelting Products of Calcinated Composite Pellets Produced from Chromium Production Waste

Ultarakova,

Tastanov,

Sadykov

et al. 2023

J. Compos. Sci.

Self Cite

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This study presents the results of the enlarged laboratory research on the melting of calcined composite pellets for ferrochrome obtained from fine-dispersed conditioned chrome concentrate containing 50.3% Cr2O3. This is a product of the gravitational beneficiation of waste sludge tailings from the Dubersay tailings dump at the Donskoy Mining and Processing Plant (DMPP) of JSC “TNC Kazchrome”. The composition of the charge for obtaining composite pellets consisted of 88.5% of chrome concentrate, 3% of mineral part of refined ferrochrome slag (RFC), 4% of ferruginous diatomite, 3% of coke and 1.5% of liquid glass. The initial charge was pelletized on a laboratory pelletizer to a size of 6–10 mm, dried at room temperature for 24 h and fired at 1200 °C for 60 min at a heating rate of 15 deg/min. On the basis of the developed composite annealed pellets, studies on the production of high-carbon ferrochrome at different melting temperatures were carried out. The results showed that with an increase in temperature from 1750 to 1850 °C, the iron–chromium phase in the composition of the alloy increases from 45.2 to 50.1%, the chromium carbide phase decreases from 23.7 to 11.3% and the chromium–iron phase increases from 7 to 11.2%. The carbon content in the alloys at temperatures from 1750 to 1850 °C varies from 7.2 to 8.94%, respectively. The maximum chromium content of the alloy is 64.82% with a melting point of 1850 °C; this alloy can be classified as FeCr60C90LP grade ferrochrome according to the international Chinese standard, which has no more than 0.03% phosphorus and no more than 0.1% sulfur.

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Recycling of Chrome-Containing Waste from a Mining and Processing Plant to Produce Industrial Products

Cited by 4 publications

References 16 publications

Research on the Production of Pigments Based on Composite Pellets in the Recycling of Industrial Waste

Research on the Production of Pigments Based on Composite Pellets in the Recycling of Industrial Waste

Microstructural Investigations Regarding Sustainable Recycling of Ceramic Slurry Collected from Industrial Waste Waters

Physical and Chemical Studies of Smelting Products of Calcinated Composite Pellets Produced from Chromium Production Waste

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