Refractory ProductsCement
CUMI has a variety of products to meet the refractory requirements of the cement plants. Our monolithics range of products find applications in different zones in the rotary kilnTip casting and in allied equipments like cyclones smoke chamber TA duct cooler
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Efficient Aluminum Chloride–Natural Graphite Battery
The quest for low-cost and large-scale stationary storage of electricity has led to a surge of reports on novel batteries comprising exclusively highly abundant chemical elements. Aluminum-based systems inter alia are appealing because of the safety and affordability of aluminum anodes. In this work we examined the recently proposed aluminum–ionic liquid–graphite architecture. Using
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Research and Application of Corundum Based Self-Flowing
The effects of different deflocculants fume silica reactive micro-alumina powder and high alumina cement on the flowability of corundum based self-flowing castables were investigated using brown corundum as the main starting materials. The behavior of the castables was evaluated according to the self-flow value of the castables.
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Solutions for calcium aluminate by KerneosSECAR
- self-flow. Technical articles on secar are available on calcium aluminates 2010New solutions to increase the shelf-life of low cement castables2010Quick drying castables based upon 80 alumina cements2010New aluminate binders and systems for refractory monolithics
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Development of Strength for Calcium Aluminate Cement
In the present study the development of strength in different calcium aluminate cement (CAC) mixture mortars with granulated ground blast-furnace slag (GGBS) was investigated. The substitution of GGBS levels was 0 20 40 and 60 weight of binder of which the CAC used in this study naturally contained C 2 AS clinker as a secondary phase.
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USAFine alpha alumina ultrafiltration membranes
Strong and durable alpha alumina ultrafiltration membranes with effective separating layers having effective pore diameters less than about 50 nm and particularly at almost any point within the range of about 10 to about 50 nm can be produced by seeding boehmite sols with appropriate seeds such as very fine alpha alumina with a specific surface area of more than 100 sq. m. per g gelling a
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USAUse of zeolites and alumina in adsorption
A process for the adsorption of at least carbon dioxide water and oxides of nitrogen and preferably acetylene from a feed gas comprises contacting the feed gas with an adsorbent mixture of a zeolite and an alumina. The process may be operated as a swing adsorption process comprising contacting the gas with the adsorbent at a first temperature and pressure to adsorb at least carbon dioxide
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THE EFFECT OF NANO-TITANIA ADDITION ON THE
The self-flow characteristics and properties of high-alumina low-cement refractory castables added with nano-titania particles are investigated. For this reason the reactive alumina in the castable composition is substituted by nano-titania powder in 0-1 wt. range.
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Jun Bo Tu Scientific.Net
Abstract The effects of different deflocculants fume silica reactive micro-alumina powder and high alumina cement on the flowability of corundum based self-flowing castables were investigated using brown corundum as the main starting materials. The behavior of the castables was evaluated according to the self-flow value of the castables.
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A comparison among various sol-gel bonding systems has been done for high alumina castable refractory. Four different sol systems namely alumina boehmite mullite and spinel have been synthesized and used individually as sole binder in high alumina castable system with particle size distribution coefficient of 0.23 as per Dinger and Funk model.
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Effect of particle size distribution and calcium
Abstract Previous works based on statistical design of experiments (DoE) defined a model all-alumina self-flow refractory castable (SFRC) with optimized particle size distribution for simultaneous high flowability index (FI) and superior post-sintering performance. This work compares the SFRC rheological behaviour and setting time with those of alternative all-alumina castables with different
Get PriceSelf-flowing high-alumina phosphate-bonded refractory
Jun 01 2017 · This study addresses the development of high-alumina self-flowing castables bonded with H3 PO 4 solution (48 wt concentration) or a mixture of phosphoric acid and monoaluminum phosphate (MAP) solutions using MgO as a setting agent. Two polyphosphates (Budit 3H and 6H) and citric acid were evaluated as dispersant additives for these castables.
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Micropowder Scientific.Net
Abstract The effects of different deflocculants fume silica reactive micro-alumina powder and high alumina cement on the flowability of corundum based self-flowing castables were investigated using brown corundum as the main starting materials. The behavior of the castables was evaluated according to the self-flow value of the castables.
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NON-CemeNt refraCtOry CaStableS CONtaiNiNg NaNO-SiliCa
In this study the effect of nano-silica sol content on the self-flow characteristics microstructure physical and mechanical properties of high-alumina self-flowing non-cement castable has been studied. The self-flow characteristics such as self-flow value and working time has been evaluated. The bulk density apparent porosity
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High Pressure Sintering of Nano-Size γ-Al2O3 IntechOpen
Figure 1. The variation of hardness in alumina-diamond nanocomposite with sintering temperature at 1GPa "in 1 "For example the transparency and mechanical strength of alumina were improved by decreasing the grain size and the residul porosity less than 0.05 was required for obtaining a high transmission of light."in "Alumina ceramics with sub micrometer microstructure obtained by
Get PriceHigh Pressure Sintering of Nano-Size γ-Al2O3 IntechOpen
Figure 1. The variation of hardness in alumina-diamond nanocomposite with sintering temperature at 1GPa "in 1 "For example the transparency and mechanical strength of alumina were improved by decreasing the grain size and the residul porosity less than 0.05 was required for obtaining a high transmission of light."in "Alumina ceramics with sub micrometer microstructure obtained by
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Conformal Atomic Layer Deposition of Alumina on Millimeter
Atomic layer deposition (ALD) can be used to coat high aspect ratio and high surface area substrates with conformal and precisely controlled thin films. Vertically aligned arrays of multiwalled carbon nanotubes (MWCNTs) with lengths up to 1.5 mm were conformally coated with alumina from base to tip. The nucleation and growth behaviors of Al2O3 ALD precursors on the MWCNTs were studied as a
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USAUse of zeolites and alumina in adsorption
A process for the adsorption of at least carbon dioxide water and oxides of nitrogen and preferably acetylene from a feed gas comprises contacting the feed gas with an adsorbent mixture of a zeolite and an alumina. The process may be operated as a swing adsorption process comprising contacting the gas with the adsorbent at a first temperature and pressure to adsorb at least carbon dioxide
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Influence of Alumina Type on the Evolution and Activity of
We have studied the lifetime activity and evolution of Fe catalysts supported on different types of alumina (a) sputter deposited alumina films (sputtered/Fe) (b) electron-beam deposited alumina films (e-beam/Fe) (c) annealed e-beam deposited alumina films (annealed e-beam/Fe) (d) alumina films deposited by atomic layer deposition (ALD/Fe) and (e) c-cut sapphire (sapphire/Fe). We show
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TUNDISHHarbisonWalker International
FASKAST® 80 80 alumina • High hot strength ultra low cement • Outstanding slagline resistance • Impact and abrasion resistant high alumina castable • Also available in pre-cast BRICK UFALA® 60 alumina brick • Very low PLC • Recommended for bottoms and bellies of a steel tundish
Get PriceAkash SatapathyHead Of OperationsAspire InfoLabs
The effect of binders and their amount on high alumina self-flow castables has been studied. Self-flow castables have been prepared by fixing the distribution coefficient q at 0 21 in the
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Latest Development in Refractory Monolithics
For high alumina refractories in steel ladles a change is ongoing from naturally based Self-flow LCC Tabular Alumina Self-Flow LCC Alumina-spinel Self-flow ULCC Spinel forming Chemistry (wt ) Al2O3 Indeed the different Calcined Alumina fine grade
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Jun Cong Wei Scientific.Net
Abstract The effects of different deflocculants fume silica reactive micro-alumina powder and high alumina cement on the flowability of corundum based self-flowing castables were investigated using brown corundum as the main starting materials. The behavior of the castables was evaluated according to the self-flow value of the castables.
Get Price(PDF) Effect of binders and distribution coefficient on
High-alumina low-cement castables with Dinger and Funk particle size distribution coefficients of 0.27 and 0.29 were studied using two different alumina fines namely WTA fine and reactive alumina.
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Effect of different binders on High Alumina Self Flow Castable
Effect of binder and its amount on the high alumina self flow castable has been studied. Self flow castable has been prepared fixing the distribution coefficient q at 0.21 in the continuous particle size distribution model as proposed by Dinger-Funk. High alumina cement and silica sol were used at 4wt and 6 wt as binder and water is used
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DEVELOPMENT OF SHOTCRETING CASTABLE
Fig. 5.22 Cold crushing strength of low cement self-flow castable as a function of calcined alumina and temperature 74 Fig. 5.23 Cold modulus of rapture of low cement self-flow castable as a function of calcined alumina and temperature 77 Fig. 5.24 XRD pattern of the self-flow low cement castable fired at different
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Particle Size Distribution for Refractory Castables A
Particle size distribution is important for the development of both shaped and unshaped refractories. But it is more critical for the castables as they need to satisfy two near contradictory properties flow and compaction (strength). Continuous particle size distribution of ordered particle sizing systems is employed primarily in advanced castables due to the many advantage such as reducing
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Nanotechnology in castable refractoryScienceDirect
Jan 01 2019 · 3.2. Colloidal suspension (alumina and silica) Sol-gel based nanotechnology without CAC is being used by the researcher to produce refractory castables. In these cases colloidal binders such as alumina (1–4 wt ) or silica (15–50 wt ) are mixed with a precursor powder such as fused alumina calcined alumina etc.
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DEVELOPMENT OF SHOTCRETING CASTABLE
Fig. 5.22 Cold crushing strength of low cement self-flow castable as a function of calcined alumina and temperature 74 Fig. 5.23 Cold modulus of rapture of low cement self-flow castable as a function of calcined alumina and temperature 77 Fig. 5.24 XRD pattern of the self-flow low cement castable fired at different
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