alumina

The invention relates to a selective hydrodesulfurization catalyst of a combined alumina base and a preparation method thereof.

Vedanta hopes the refinery will produce at least one million tonnes of alumina a year.

The catalyst vendors came out with a catalyst incorporating a low surface area, high purity alumina carrier.

Alumina is an extensively used catalyst and carrier, it is often obtained commercially by baking pseudo -boehmite(PB) on high temperature.

Used to produce alumina cement, abrasive materials, ceramic industry, as well as a variety of aluminum compounds.

But, perhaps recognizing China's impact, a market price offers a way of at least monetizing the extra value in alumina.

Iron ore, coking coal, alumina and fertiliser are among the few key commodities whose price is still negotiated in annual contracts.

The interaction between a alumina ceramic target and a shaped charge jet is observed by means of flash X ray photography.

In the Fluidized Bed System of the Alumina Calciner, the surface moisture of the hydrate is evaporated by pneumatic dryer.

Alumina has been a major constraint on Chinese aluminium production, but supply from China is starting to ease that constraint.

By the aforementioned method, light-weight alumina particles can be produced with the particle size controlled well to a uniform value.

At this time the best experimental conditions fluoride removal rate of activated alumina up to 98. 8%.

Experimental study on the method used for processing hot-assisted laser cutting of alumina ceramics are analyzed and studied.

Polishing using the entire surface of a tool is possible thanks to the braided Alumina Fiber structure.

That leaves just alumina and fertilisers as the major commodities consumed by China whose price is still negotiated in long-term contracts .

Judging from the present situation, local alumina and aluminum production has not been too much of an impact.

Also, other ceramics layers, especially, a ceramics layer 7 made of the alumina, may be joined to the solid electrolyte layer.

The Hungarian government says it's doing everything possible to stop MAL alumina from going bankrupt, insisting the fine must be paid.

Products used for treatment of water intended for human consumption - Granular activated alumina.

However, the catalytic properties of zirconia, which also acts as support, is not as well understood as alumina.

By calculating the calc-alkali index (CA) and alumina saturation index (ASI), the magma types of the granites can be roughly determined.

The invention discloses property-transformation alumina carrier which contains titanium and silica agent and its relative preparing method.

But with producers of alumina pushing for a change in the system, that may soon change.

The dust content in carbon dioxide gas is an important index used in the process step of carbonating decomposition in alumina production.

The invention provides a catalyst composition formed by the method and comprising the chromium and an alumina carrier treated by sulfate.

The results indicate that high sphericity and smooth-faced alumina based ceramic microspheres can be obtained by twice sintering process.

The present invention discloses alumina producing process, and is especially the causticization process in alumina producing Bayer process.

A pear - shaped synthetic sapphire, ruby, or other alumina - based GEM, produced by fusing and tinting alumina.

Finally, a thin layer of diamond-like film is deposited on the surface of alumina layer.

Phosphorus was likely to act with activated alumina. The interaction between phosphorus and zeolite showed an approaching to equilibrium.

Various synthetic procedures, modification methods of mesoporous alumina and its application for acid catalysis are reviewed herein.

The present invention relates to one kind of no-cement light alumina-magnesia cast material and its preparation process.

The present status and developing direction of toughening research on alumina oxide ceramics material are discussed.

The results show that the attrition index of alumina from carbonization precipitation increases with the increase of fractal dimension.

The technique is using the alumina material as the body of the definite diameter gate.

Aluminium hydroxide, the precursor of alumina, was synthesized by precipitation reaction of the aluminium nitrate and sal volatile.

The electrolyte, which fills the space between the anodes in the pot, consists of molten cryolite containing dissolved alumina.

In this paper, we decided to use a great potential for the development of the microwave method to prepare ultrafine alumina powder.

Typically, these membranes are MADE from porous carbon, zirconium oxide, or alumina, although a wide range of materials are being tested.

Colloidal properties of the feeble magnetic alumina and zinc oxide ceramics also significantly influence the texturing.

Corundum ball is a type of alumina ball, because of its high content of alumina; it is also referred to as alumina ball.

The result separated for asphaltic components is investigated with oxide of alumina maintaining different amount of the water as fix -phase.

The invention also provides a method suitable for producing boehmite particles which can be used as raw materials of the alumina particles.

Among Rio's assets, analysts have pointed to both iron-ore and alumina mines in Australia that are a good fit for Chinalco.

and a circuit for returning the soda-removed alumina dust back into the calciner.

That arrangement provides a neat cost hedge for aluminum producers that have integrated alumina operations .

The tube alumina substrates for ceramic membrane with good properties were developed, using paraffin and polyethylene as plasticizing agent.

Light magnesia oxide, heavy magnesia oxide, magnesia chloride, ceramic special alumina, alumina refractories.

ICSOBA, the International Committee for Study of Bauxite, Alumina & Aluminium, was formed in 1963 in Zagreb, Yugoslavia.

The interface structure for alumina-metal composites is an important theoretical and practical issue.

The alumina ceramics is of good properties and widely used.

The review summarizes the recent methods for preparation of nano-sized alumina powder, and introduces respective strongpoint and shortages.

Red sludge is a byproduct of the refining of bauxite into alumina, the basic material necessary for manufacturing aluminum.

The utility model discloses a more reasonable automatic control device for the feeding of alumina.

The alumina templates were prepared by the twostep anode oxidation method, and the anode alumina oxidation(AAO) templates were examined.

In the past, Magnesia-Alumina-Spinel bricks were considered as state of the art for chrome-free kiln linings in the cement industry.

Delays or outright refusals have been reported for imports permits for alumina (feeder stock for aluminum) .

the main products are dryer, defluoring agent, sorbent, catalyst, catalyst carrier, alumina powder, carbonized activated alumina etc.

The outlet concentration of Alumina evaporators system is an important outlet quality index.

The alumina nano-tubes can be used in the catalysis, adsorbing separation, nanotechnology components and other fields.

Usually, the purity alumina materials synthesis basically meet the requirements of the purity of raw materials.

Adding nanoparticles of alumina kept much more of the light scattering until it got absorbed.

The effects of nozzle structure, operating pressure, solid content and inlet temperature on alumina properties are discussed.

Silica or alumina based ceramic diffusers generate microbubbles for solid-liquid separation of pollutants in wastewater.

Effect of elution phase composition on the elution characteristics of phospholipids on the alumina column was experimentally studied.

Silica-alumina mineral as eggshell strengthening dosage with other nutrition matter, however, have little reports.

Alumina plants are scattered around the world, with the 12 largest concentrated in Australia, Brazil and China.

The crust is broken periodically and alumina is stirred into the electrolyte to maintain the alumina concentration.

Additionally, ceramic papers, including alumina and alumina-silica paper, can be rigidized with the liquid.

In this technology, the chelating agent 1530 and hydrochloric acid (peptizing agent) were used in preparing the high stable alumina sol.

Both silica and alumina colloidal solutions can be regarded as admixture for high performance cement-based materials.

and if the alumina inclusion concentration satisfies the target value, continuously casting the molten steel.

Porous anodic alumina (PAA) formed in acid solution by anodizing of metal aluminum has porous structure with ordered nanopore arrays.

The catalyst consists of transition metal oxide loaded onto active carbon, alumina, silica, diatomite or molecular sieve.

The construction of inorganic alumina powder granulation suitable for extrusion-spheronization viscoplastic system.

The present invention provides a hydrocracking catalyst containing amorphous silica-alumina and preparing method.

The invention discloses a dual-head bolt connection method of diesel engine alumina crack box, belonging to the burning motor technique.

The solidified structures and fracture morphology of alumina short fiber reinforced Al Si alloy composites are studied with SEM.

One such crystal is the ruby, which contains trivalent chromium ions dispersed in a matrix of alumina.

This paper describes the design and application of automatic control and management system for prod- using chemical alumina.

for the production of top grade dead burned magnesia , dead burned dolomite , bauxite , alumina and spinels.

An improved precipitation system is provided for the Bayer process production of alumina hydrate.

An ion beam assisted method for large-area fabrication of nanodot arrays in anodic alumina oxide (AAO) templates was investigated.

Secondly, the drying and calcination processes and the control of agglomeration were studied for alumina precursor spheres.

Using this expression to calculate the optimum doping contents of silica and alumina and zinc oxide and tin oxide and barium-titanate.

magnesia , dolime , alumina , magnesia - alumina spinels , chrome - magnesia spinels.

The support composition comprises an amorphous silica-alumina having unique properties.

Our corporation can produce all sorts of high alumina and common high alumina bricks for ladles with steady quality and good service.

Main Purpose: ceramic roller, high alumina ceramic ball and lining, Shaped and monolithic refractories etc.

Specializing in the production of high-quality magnesia, alumina, magnesia chloride products.

Specializing in the production of high-quality magnesia, alumina, magnesia chloride products.

Vertical lime kiln is the indispensable equipment for alumina sintering production process.

It is shown that silica-alumina-barium deoxidizer has good deoxidation effect. promotes inclusion floating and purifies steel liquid.

The effects of hydrolysis factors and drying methods on the properties of alkoxide hydrolysis and alumina are studied.

Use waste vitriol, quadratic aluminum dust as stuff to produce alumina for printing ink was described in this paper.

Adsorption dryer by silica gel, activated alumina, zeolite as a desiccant.

The invention discloses a heating tank, and in particular relates to an alkaline medium heating tank in alumina production.

Soft lithography and anodic process were combined to prepare the pattern porous alumina successfully.

The brokerage points to aluminum companies like Australia's Alumina, Russia's Rusal, and India's Hindalco Industries.

CHEMICAL ANALYSIS OF MANGANESE ORES. DETERMINATION OF ALUMINA, LIME AND MAGNESIA ATOMIC ABSORPTION SPECTROMETRIE METHOD.

Mainly engaged in gangue power generation, production and sale of alumina and electrolytic aluminum.

PROCESS OF PRODUCTION AND CHARACTER Pink Fused Alumina is produced by doping Chromia into Alumina, which gives the material pink color.

Alumina reserves most countries: Guinea, next Australia, Brazil, Jamaica.

Alumina is a common carrier for catalysts. A microspheric alumina can be prepared by spray drying process.

The performances of high alumina castable and the factors controlling its properties were investigated.

The fuzzy control of alumina concentration in industrial aluminium cells is investigated.

The open cell alumina foam ceramics were prepared by impregnating a polymeric sponge with aqueous ceramic slurry.

The dryer contains activated alumina used as a moisture absorbent .

My company perennial production and processing of alumina, zro2, aluminum nitride substrates, welcome processing or custom.

and the coarse particle aluminium hydroxide is subjected to high temperature roasting to prepare the sandy alumina.

A novel process for alumina sintering in rotary kiln, namely the spray drying sintering process, is presented.

Purification was then best achieved via flash column chromatography using basic alumina.

Using direct bonded magnesia-alumina brick to substitute for magnesia-chromite brick was studied in this paper.

Sodium beta-alumina was discovered in the 19th century when the process of extracting aluminium from its ore, bauxite, was being developed.

In this paper, we present a reflection spectrum method for measuring the thickness of nano-porous alumina(PA) films.

The invention discloses a self-evaporation technology of steam condensate, belonging to the technical field of alumina production.

Value is migrating up the production chain to alumina.

processing for the homogeneous mixing of alumina powders and additives.

An aerial view shows a broken dam, which caused a toxic red sludge spill, from a Hungarian alumina plant near Ajka.

This article provides a brief review of developments in application of porous alumina membrane in recent years.

The red mud is the tailing produced during the process when separating alumina from bauxite.

Ordinary PS plate aluminum base, alumina layer and photographic adhesive layer.

and sintering the ceramic fiber to obtain the continuous alumina-based ceramic fiber.

Therefore, this research is valuable to the low cost preparation of alumina ceramics.

Tight production company fused alumina, white corundum, high-alumina corundum, MgAl2O4, mullite, zirconium mullite, and other products.

advanced technical ceramics . methods of test for ceramic powders . part 1 : determination of impurities in alumina.

The influence of preheat treatment and depositing nano-alumina films on the specific capacity of Al foil for 20V capacitor was researched.

The alumina rich spinel and magnesium rich spinel have different growth mechanisms.

There isn't any disrepair on the microcosmic surface of CAF, and the sol can immerge into the holes of the alumina foil.

Corundum may be the typical secondary minerals in the high-alumina fly ash.

The effect of processing parameters on densification and microstructure of alumina ceramics is reviewed in the paper.

The chosen refractory is from ordinary clay brick, high alumina brick to silica brick and low creep re.

It is white and its hardness is higher, but toughness lower than that of brown fused alumina.

Local producers have heftily lifted domestic output of alumina, copper, zinc, coking coal, lead and iron ore over the past 12 months.

Study the effect of the mixed rare earth oxide on the properties of the fireclay bricks and high alumina bricks.

APPLICATIONS Brown Fused Alumina is a tough, sharp abrasives which is highly suitable for grinding metals of high tensile strength.

Dr Katz has now used sodium beta-alumina to build transistors on both glass substrates and flexible, plastic ones.

For production of alumina by alkaline process, silicon in bauxite is the most harmful impurity.

It is concluded that coating of sodium silicate alumina clay makes face of aluminium alloy casting in green sand nonsmooth and level.

Red Mud is a waster material formed during the production of alumina.

According to their use can be divided into: activated alumina sorbent, desiccant and catalyst carrier.

Porous alumina was prepared by anodization in oxalic acid electrolyte.

As an important nano material, nano- alumina has wide applications in many fields, such as catalyst supports and ceramic materials.

Dispersion of sol-derived nano-alumina in an organic solvent mixture containing a 1, 2-diol with simple agitation.

The nano-tubes can remove the surfactant through ion exchange then get alumina nano-tubes.

They should be fired only in oxidation, as reduction discourages the binding of lead to silica, alumina and other ingredients.

Classification of dense shaped refractory products. Part 1 : alumina-silica products.

In addition, alumina is the origin of fatigue crack and thus impairs the fatigue property of bearing steels, rail steels and wheel steels.

DURA-32 Zirconia Toughened Alumina (ZTA) bead was sintered from alumina powder and zirconium silicate powder.

Red Mud is the waste of the alumina industry, which yield is tremendous.

Study on Water-based Coating of Brown Alumina Powder and French Chalk for Lost Foam Casting.

An aerial view of the broken dike of a reservoir containing red mud from an alumina factory near Ajka, Hungary on Tuesday, Oct.

Red mud is the solid waste generated in alumina extracting process from bauxite.

Torpedo Car generally uses an Alumina-Silicon Carbide-Carbon as a work lining and 60% Al2O3 bricks as a safety layer.

The new electrolyte allows for the electrolytical reduction of alumina at temperatures as low as 700 DEG C.

The main material of brown fused alumina is bauxite, which is electrically fused in high temperature.

In the Bayer process for the production of alumina, problems are caused by silica dissolving in the caustic liquor.

Sino Mining International Ltd. locked in a supply of alumina for 30 years from Alcoa World Alumina & Chemicals in 1996.

Tailing is the solid waste residue produced in alumina production.

The first realization of transparent alumina ceramics among all advanced ceramics expand a new research field of advanced ceramics.

The dominant process of alumina production is Bayer process in the world, and the researches are mostly concerning this process.

of magnesite , dolomite , alumina and spinels.

HYDRAULIC BINDERS. HIGH-ALUMINA MELTED CEMENT.

The porous structure of alumina film formed on aluminium at high voltage anodizing in chromic acid is investigated by SEM and TEM.

At last, some advices about the alumina concentration control were put forward.

A large proportion of China's new alumina capacity is also forced to rely on increasingly expensive bauxite imports.

Most alumina is sold under contracts pricing it at 12%-14% of the London Metal Exchange aluminum price.

and (5) obtaining the content of the effective alumina in the bauxite by computation.

the catalyst is set in the oxidizing catalytic filtering layer, which is sintered by alumina particle and metal oxide.

A high efficient sediment tank for alumina production was presented.

and calcining the second dry powdery aluminum hydroxide to give alumina having a high bulk density.

MEDICAL AND SURGICAL EQUIPMENT. IMPLANTS FOR SURGERY. CERAMIC MATERIALS BASED ON ALUMINA.

At the same time, the supply of cheap alumina has dried up, putting many smelters under financial strain.

Behavior of activated alumina in FCC catalysts were investigated by N2 absorption, IR and XRD.

A similar scramble to lock up bauxite and alumina supply could ensue.

First, to extract iron from ore and alumina from dregs of blast furnace.

Wear resistance of 0. 7%C steel was improved with increasing true strain amount when alumina and quartz particles were used as abrasives.

The waste gas SO2 absorption and purification with Bayer red mud from alumina plant was studied.

The steam-power cooperation in some Western alumina refineries is presented.

Alumina import bans have been exacted against smelters with capacity below 100, 000 mts .

Fillers added to the mixture are quartz sand and alumina.

Based on this, [100]-textured diamond film was successfully deposited on alumina ceramic.

A new kind of bi-supported metal catalysts was prepared by using columniform alumina and acrylon and Pd.

The activator mixed in the alumina powder is the rare earth oxide.

Fly ash is a very good resource for preparing alumina and alugel, because the mass fraction of alumina in it can be up to 15%~40%.

Sodium metaaluminate as a regenerant has better regeneration effect on the activated alumina that is saturated and has adsorption capacity.

Two tonnes of alumina can produce one tonne of aluminium.

Its main raw material is a bayer alumina, which is electrically fused in high temperature.

And legal hot water with the alumina powder conducted a series of follow.

Red mud is the major solid waste produced in the process of alumina extraction.

In the six months to the end of June, net profits fell 5 per cent to Rm6. 4bn, which Chalco blamed on lower aluminium and alumina prices.

Alumina nanorods were synthesized by hydrothermal technique with Al(NO_3)_3 as raw material and CTAB as template.

In this paper, the preparation processes and research progress of extracting alumina from fly ash in China and abroad were introduced.

INDUSTRIAL PREPARATION OF ALUMINA POWDER AND ITS DEVELOPMENT IN CHINA.

The world's third-largest alumina producer said its quarterly earnings fell 92%.

Conclusion: It can be inferred that silicoating method be a better way for glass infiltrated alumina ceramic bonding.

The government's efforts to restrain investment was aided by the surge in alumina prices from 2003 to early this year.

The Ajkai alumina plant resumed operations two weeks after the spill.

The results show that the increase of arm incline angle of agitator can not improve the distribution difference of alumina and silica.

C. so that alumina on su*ces of the size-enlarged sludge particles 12 are sintered.

In energy-intensive industries, rolled steel production was up year-on-year 26 per cent; alumina 54 per cent and aluminium 43 per cent.

The plant makes alumina -- a derivative of the metal ore bauxite that is used to make aluminum.

Spot alumina prices are coming down rapidly as a result.

Alumina, the powder refined from bauxite that is used to make aluminium, has seen the most explosive growth.

This article briefly reviews development trend of alumina industry in China.

With the development of science and technology , the demand of ultra - fine, high - purity alumina powder is increased.

The fractal theory was introduced to study the relationship between sandy alumina morphology and strength.

Products used for treatment of water intended for human consumption - Iron coated granular activated alumina

Raw mix slurry quality prediction model used for alumina sintering production process

Study of optical polarization properties of the electrodepositing metal in porous anodic alumina films

Quick Nickel Metallization and Magnetic Properties on the Surface of Alumina Powder

Effect of the Light Magnesia Powder and Alumina Powder on the Properties of Light-weight Magnesite-alumina Spinel Refractories

Development and property study of zirconia toughened nano-composite alumina ceramic powder for dental application

Pattern recognition of properties of alumina- magnesia castable and optimization of its technological parameters

Measures to Prolong Service Life of Activated Alumina in Hydrogen Peroxide Production by Anthraquinone Process

Synthesis, characterization and potential applications of the new-type catalytic material-mesoporous alumina molecular sieve

Preparation, structural characterization and catalytic application of organized mesoporous alumina

Study of CdS Nanowires Deposited in Silicon Based Porous Alumina Film by Non-aqueous Electrochemical Deposition

Study of the influence of sintering temperature on the trap distribution of alumina ceramics

Spectrophotometric Determination of Orthophosphate in Natural Water After Preconcentration by Activated Alumina Micro-column

Design and Application of an Automatic Control and Computer Management System for Special Type Alumina Production Process

Study of the Preparation Technology for Orderly and Porous Nanometer Alumina Film

Testing method for the rate of linear change of high alumina and fire clay plastic refractories

Analysizing the Influence of Organic During the Alumina Production by Bayer- mineral Processing Method and its Countermeasure

Preparation of a magnesia-alumina spinel catalyst support with hydrothermal method

Fireclay and high-alumina refractories--Determination of phosphorus pentoxide content--Molybdenum blue photometric method

Fabrication of Ordered Arrays of Polymethylmethacrylate Nanotube Using Porous Anodic Alumina as a Template

Preparation and Structural Characterization of Rare Earth Doped Alumina-Siloxane Gel and Its Modification on ER Effect

Fireclay and high-alumina refractories--Determination of manganese oxide content--Ammonium persulfate photometric method

Study of High Temperature Oxidation and Corrosion Resistance of Sol-Gel Alumina Coating on Titanium Alloy

The results show that the sinter intensity and the compression ratio of the sample increases directly with the alumina oxide content;

A New Coating Technique Used for Preparation of Sol-Gel Alumina Films

Fireclay and high-alumina refractories--Determination of titanium dioxide content--Hydrogen peroxide photometric method

Design and Analysis of the Air Conveying System for Alumina Powder from Tank Back to Storage

Research on Catalytical Supports of Automobile Exhaust Purification -Nanometer Alumina Template of Self- organized Behaviour

Preparation and Characterization of Unsymmetrical Alumina Ultrafilter Membrane

Study on Phenomenon of Flowing-Wax and Wax Choked in the Production of Electronic Ceramics Sealing Parts of Alumina

The Preparation of Ultra - fine Aluminum Hydroxide from Rich -alumina Residues with a New Dispersant

Preparation of Alumina-Supported Nobel Metal Iridium Catalysts and Their Catalytic Performance for Methanol Decomposition

Implementation of scientific development concept to promote recurrent economic development for alumina industry

Research manufacture and application of high alumina sand in case of phosphoric add as bonding agent

Preparation of Nanoscale Alumina Powder by Heterogeneous Azeotropic Distillation Processing

Influence of Material Flow in Alumina Manufacturing Process with Bayer-Sinter Combination Method on Its Energy Intensity

Surface Electro-chemical Performance of Mud-mineral from Alumina Production and Selective Flocculation with Polymer Functional Group

filtering the extracting solution, chromatographic separation in neutral alumina column to eliminate impurity;

Influence Factors Study of Alumina Supported Copper Ultrafine Particle by Sol-Gel Method

Interface reaction and thermodynamic analysis on the magnesium alloy matrix composite reinforced with alumina silicate short fibers

Standard Test Method for Hydrogen Chemisorption on Supported Platinum on Alumina Catalysts and Catalyst Carriers By Volumetric Vacuum Method

Technical Study of Enhancing the Output of Alumina Grog Kiln and Reducing the Consumption of Fuel Per Unit

Property of Nanometer Aluminium Powders and Its Effect on Preparation of Alumina Powders by Precipitation Method