Prospects for the Integrated Use of Slag Wastes From Ferrochrome Production for Heat-Resistant Materials

Bazhirov, Tynlybek; Protsenko, V. S.; Bazhirov, Nurlybek S.; Dauletiyarov, M. S.; Serikbayev, Bazarbay; Bazhirova, K. N.

doi:10.32014/2020.2518-1491.105

Cited by 3 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the slag from the production of low-carbon ferrochrome, the main crystalline phase is calcium orthosilicateγ-Ca2SiO4, as well as magnesium orthosilicate (forsterite) Mg2SiO4 [85]. The authors of the studies [85,86] have found that from the point of view of chemical, mineralogical composition and refractoriness, the slags from the production of high-carbon ferrochrome and low-carbon ferrochrome can be a valuable raw material for the manufacture of heat-resistant materials.…”

Section: Leachingmentioning

confidence: 99%

“…Moreover, more than 5 million tons are represented by slags from the production of high-carbon ferrochrome and more than 8 mln. tons -pulverized, low-carbon ferrochrome slag [8]. According to [9] data in Aktobe region, contamination of soil, water and air with hexavalent chromium is recorded with a significant exceedance of the MPC until 2010.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Prospects for the Extraction of Chromium From Slag Ferrochrome Production by Acid Method

Kadirbekov,

Chernyakova,

Kaiynbayeva

et al. 2023

Chem. J. of Kaz.

View full text Add to dashboard Cite

In the Republic of Kazakhstan, there is a noticeable upward trend in the volume of industrial waste, including from the production of ferrochrome. The problems of man-made pollution of the natural environment are becoming more acute every year, and are beginning to take on a global dimension. Technogenic ferrochrome production waste contains chromium, which is highly toxic and carcinogenic, which poisons water, soil, negatively affects the activity of all living organisms. Slags contain a significant number of valuable components used in various industries, and above all, chromium, which is irrevocably lost during storage. The main task still remains the development of industrial waste disposal processes that reduce the anthropogenic load on the biosphere and ensure the rational use of natural resources. The purpose of the work is to justify the choice of the method of processing the slags of the ferrochrome production. Conclusions: The analysis of the modern scientific and patent literature on acid processing and utilization of chromium-containing slags from the production of refined and high-carbon ferrochrome has been conducted. It should be noted that the described methods of various methods of processing ferrochrome production slags, despite their availability, are characterized by a multi-stage nature and do not allow complete processing of ferrochrome production slags in Kazakhstan. Currently, there is an excess of sulfuric acid production in Kazakhstan, so it becomes advisable to use sulfuric acid as a reagent for leaching chromium from slag from the production of ferrochromium. It can be expected that in sulfuric acid under certain conditions, such as heating, a sufficiently high degree of extraction of chromium (III) will be achieved in slags from the production of high-carbon chromium and in refined ferrochem slags.

show abstract

Section: Leachingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Prospects for the Extraction of Chromium From Slag Ferrochrome Production by Acid Method

Kadirbekov,

Chernyakova,

Kaiynbayeva

et al. 2023

Chem. J. of Kaz.

View full text Add to dashboard Cite

show abstract

“…Its non-metallic components form up to 10-12 tonnes of slag per 1 tonne of phosphorus. The slag is a waste product (46-50% of CaO,.0% of Р2O5, 2-3% of CaF2); it is stored in dumps, occupies land, and worsens the ecology of the region due to the dust formation (Bazhirov et al, 1998). There are some methods for processing phosphorus-containing slags and using them for the production of fertilizers (Hou et al, 2021), brick (Kovkov et al, 2009), silicon dioxide (Bochevskaya et al, 2019), cement (Suleimenov et al, 1980), and concrete products (Khudyakova et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…There are some methods for processing phosphorus-containing slags and using them for the production of fertilizers (Hou et al, 2021), brick (Kovkov et al, 2009), silicon dioxide (Bochevskaya et al, 2019), cement (Suleimenov et al, 1980), and concrete products (Khudyakova et al, 2009). However, phosphorus slag has a limited demand in the construction industry due to the fact that it contains P2O5 (up to 3%), which forms a poisonous gas -phosphine -in a humid medium (Bazhirov et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Processing of phosphorites with extraction of phosphorus, obtaining calcium carbide and ferroalloy

Shevko,

Uteyeva,

Badikova

et al. 2023

Physicochem. Probl. Miner. Process.

View full text Add to dashboard Cite

The article considers the results of studying the thermodynamic computer modeling of the interaction of phosphorite (Karatau basin, Kazakhstan) with carbon and coke performed using the HSC-10 software package and electric smelting of the phosphorite with coke and steel shavings in an arc furnace. The modeling allowed us to determine the equilibrium extraction degrees of phosphorus into gas (Р2, Р4), silicon into ferroalloy in the form of iron silicides (FeSi2, FeSi, Fe3Si, Fe5Si3, Si) and calcium into CaС2. At temperatures above 1500 °C, regardless of the amount of iron, the extraction degree of phosphorus into gas is more 99%. The resulting ferroalloy contains 21.2-23.8% of Si, 1.6-2.8% of Al; the calcium carbide has a capacity of 288-325 dm3/kg. The extraction degree of silicon into the alloy was 89.8%, calcium in CaC2 – 72.5%, phosphorus into gas – 99.4%. The ferroalloy, formed at the electric smelting of the Chulaktau phosphorite together with coke and steel shavings and containing 24.9-29.8% of Si, is FS25 grade ferrosilicon, and the formed calcium carbide has a capacity of 278-290 dm3/kg and belongs to the third and second grades. The developed technology makes it possible to increase the degree of phosphorites’ comprehensive use two times (up to 87.5%).

show abstract

“…The industry producing ceramic building materials is marked by unlimited possibilities for using waste [16,17]. This is due to the large scale and material consumption of the construction complex as well as its range of products.…”

mentioning

confidence: 99%

Phase Composition and Physico-Mechanical Properties at Different Firing Temperatures of Ceramic Earthquake-Resistant Bricks with the Use of Ferro-Dust

2021

View full text Add to dashboard Cite

Ceramic bricks based on low-melting clay and ferro-dust from self-disintegrating, low-carbon, ferrochrome slags, graded from M100 to M175, respectively, were obtained in the temperature range 950 -1100°C. The highest grades are in bricks fired at the temperatures 1050 and 1100°C, respectively, M150 and M175, which can be used as earthquake-resistant. Studies have shown that hematite, wollastonite, diopside and a liquid phase appear at brick firing temperature 950°C. Raising the firing temperature to 1000°C contributes to the appearance of anorthite and cristobalite. Raising the firing temperature to 1050°C does not bring about any special changes, except for an increase in the content of cristobalite and anorthite and a decrease in the content of feldspar. Subsequent raising of the firing temperature to 1100°C results in higher content of anorthite, diopside and cristobalite. The physicomechanical indicators increase due to the formation of anorthite and diopside in the samples.

show abstract

Prospects for the Integrated Use of Slag Wastes From Ferrochrome Production for Heat-Resistant Materials

Cited by 3 publications

References 0 publications

Prospects for the Extraction of Chromium From Slag Ferrochrome Production by Acid Method

Prospects for the Extraction of Chromium From Slag Ferrochrome Production by Acid Method

Processing of phosphorites with extraction of phosphorus, obtaining calcium carbide and ferroalloy

Phase Composition and Physico-Mechanical Properties at Different Firing Temperatures of Ceramic Earthquake-Resistant Bricks with the Use of Ferro-Dust

Contact Info

Product

Resources

About