Research in the Field of Preparing Molded and Unmolded Refractories Based on High-Alumina HCBS. Part 1. High-Alumina Bauxite as a Basic Raw Material Component

Pivinskii, Yu. E.; Dyakin, P. V.; Perepelitsyn, V. A.

doi:10.1007/s11148-015-9845-x

Cited by 25 publications

(4 citation statements)

References 11 publications

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“…The grains individually have their own composition, pore distribution and non-uniform microstructure. This fact is due to the absence of technologies to promote a good pre-firing homogenization and the use of shaft kilns in many plants [7]. In a study splitting the Chinese bauxites by colors (yellow, gray and black), it was shown notorious difference in the chemical composition and mainly in the physical properties, in which the black bauxites had the greatest density (3.42 g/cm 3 ) and the lowest porosity (5.0%-7.5%), and the gray bauxites showed the lowest density (2.99 g/cm 3 ) and the greatest porosity (15%-20%) [7].…”

Section: Resultsmentioning

confidence: 99%

“…The refractory aggregates are considered the 'skeleton' of the castable and account for the largest amount of the formulation, being proportioned to achieve the desired packing and particle size distribution. A wide variety of aggregates is available and castable formulations can be based on only one type or a combination of them according to the properties demanded [6,7]. In this scenario, the highalumina materials account for 70% of world production and quite often the main raw material for producing them is the refractory grade bauxites [7].…”

Section: Introductionmentioning

confidence: 99%

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Brazilian refractory grade bauxite: a new alternative to refractories makers and users

Pereira

Reis

Ferreira³

et al. 2019

Cerâmica

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After two centuries of the discovery, we now know that there are several types of bauxites, in which mineralogy points to the most appropriate application. In the non-metallurgical industry, bauxites with refractory grades have been applied as raw materials in the production of high-alumina refractories for both shaped and unshaped. The increase in the cost of other sources of high-alumina raw materials has encouraged the refractory producers to find a more cost-effective substitute, such as refractory-grade calcined bauxites (RGB). Nowadays, concerns rise regarding the availability of RGB due to the continuous restrictions taking place in China, which has a 95% market share. This work presents a new RGB of high-alumina content (~85%) from a Brazilian source in which process enabled a technology with high refractoriness.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Brazilian refractory grade bauxite: a new alternative to refractories makers and users

Pereira

Reis

Ferreira³

et al. 2019

Cerâmica

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“…The CaO content of 1.5-1.8 wt.% for the formulated castable is also congruent with the CaO tolerance for low-cement castables (LCCs) as classified by other researchers (Parr et al, 1997;Lee et al, 2001;Garbers-Craig, 2008). The slight increase in Fe 2 O 3 can be attributed to the bauxite grog aggregate, which inherently picks up Fe 2 O 3 as an impurity from process materials (Hancock, 2000;Pivinskii, Dyakin, and Perepelitsyn, 2015). Regrettably, the presence of impurities such as Fe 2 O 3 tends to significantly affect the high-temperature strength properties of the formulated refractory castables.…”

Section: Characterization Of Formulated Castablesmentioning

confidence: 99%

Effect of reclaimed bauxite on andalusite-based refractory castables for tundish applications

Matinde¹,

Msibi²

2019

J. S. Afr. Inst. Min. Metall.

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The robust nature of alumina refractory materials presents opportunities for their in-process reclaiming and re-use in non-critical applications. Virgin refractories can be substituted with different quantities of reclaimed materials without compromising the quality of the refractory products. In this study, the effect of reclaimed bauxite on andalusite-containing refractory castables for tundish applications was investigated. The recycled bauxite was formulated in different proportions to replace virgin andalusite in the castables. Standard tests were conducted to evaluate the physical, physicochemical, and thermochemical properties of the formulated products. Static corrosion tests were conducted using tundish slag in order to simulate the actual operating conditions. The results show that the standard flow behaviour, open porosity, and bulk density of samples containing up to 22 mass% reclaimed bauxite were comparable to those of the reference castable. However, high-temperature properties such as static corrosion at 1400°C and hot modulus of rupture at 1500°C indicated that there is an upper constraint to the amount of substitution. The study demonstrated direct potential savings of up to 10% when the reclaimed alumina replacement ratio was increased to 22 mass%.

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“…Отличительной особенностью керамобетонной технологии является присутствие в составе наряду с полифракционным заполнителем искусственного керамического вяжущего (ИКВ), полученного с применением высококонцентрированных керамических вяжущих суспензий (ВКВС) [6,7]. В качестве исходных материалов может быть использовано огнеупорное сырье разного состава, в частности термообработанный высокоглиноземистый боксит [8]. Полученные на его основе ИКВ показали высокую эффективность при изготовлении формованных и неформованных огнеупорных материалов [9][10][11][12].…”

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High-alumina masses based on plasticized bauxite suspensions

Gavshina¹,

Doroganov²,

Doroganov³

et al. 2019

Nov. ogneup.

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The results of studies of the reotechnological properties of plastic refractory masses based on bauxite suspensions plasticized with refractory clay are presented. The regularities of the influence of the filler diameter and the content of the binder in the mass on the structuralmechanical and operational properties of samples based on it are established. Samples from the developed masses intended for molding at low pressure (up to 10 MPa) are characterized by high compressive strength (100‒110 MPa) and relatively low porosity (up to 20‒21%) after heat treatment at 1300 oC. Ill. 5. Ref. 20. Tab. 4.

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Research in the Field of Preparing Molded and Unmolded Refractories Based on High-Alumina HCBS. Part 1. High-Alumina Bauxite as a Basic Raw Material Component

Cited by 25 publications

References 11 publications

Brazilian refractory grade bauxite: a new alternative to refractories makers and users

Brazilian refractory grade bauxite: a new alternative to refractories makers and users

Effect of reclaimed bauxite on andalusite-based refractory castables for tundish applications

High-alumina masses based on plasticized bauxite suspensions

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