Abstract:
A method of producing high strength shaped alumina by feeding alumina power into an agglomerator having a shaft with mixers able to displace the alumina power along the shaft, spraying a liquid binder onto the alumina power as it is displaced along the shaft to form a shaped alumina, and calcining the shaped alumina. The shaped alumina produced having a loose bulk density of greater than or equal to 1.20 g/ml, a surface area less than 10 m 2 /g, impurities of less than 5 ppm of individual metals and less than 9 ppm of impurities in total, and/or crush strength of greater than 12,000 psi.
Abstract:
A particulate material includes an aluminous material and a silica dopant. The particulate material includes crystallite particles with a crystallite particle size of less than about 10 nm. The crystallite particles are stacked together to form primary particles with a primary particle size of less than about 500 nm. The primary particles are agglomerated together to form secondary particles with a secondary particle size of greater than about 1 µm. The particulate material has a mean pore diameter of not less than 8 nm.
Abstract:
Gegenstand der vorliegenden Erfindung ist ein Trägermaterial, das hochporös und mit einer mechanisch stabilen, bauteildurchdringenden Gerüststruktur aus alpha- AI2O3 versehen ist, Verfahren zu dessen Herstellung sowie desssen Verwendung.
Abstract translation:本发明是一种载体材料,该材料是高度多孔的,并提供与α-Al 2 O 3的机械稳定的组分穿透框架结构,过程及其制备和使用desssen。
Abstract:
The present invention describes a process for producing a bauxite agglomerate comprising: providing a crude bauxite having a fine particle size and an initial weight % of water as a feed bauxite, optionally screening said feed bauxite or pre-screening at least part of said crude bauxite, optionally adjusting the weight % of water of the feed bauxite; providing a cement binder; mixing a feedstock bauxite based on said feed bauxite with the cement binder in at least one mixer under intensive mixing conditions producing a bauxite binder mixture; and curing the bauxite binder mixture for a cure time thereby allowing the cement binder through a reaction with the water in the bauxite binder mixture to cure and form the bauxite agglomerate. The process enhancing the value of crude bauxite, by producing a transportable agglomerated crude bauxite from a fine non-calcined bauxite. The bauxite agglomerate serving as an intermediate product for producing a smelter grade alumina.
Abstract:
La présente invention se rapporte au domaine des matériaux solides pour l'adsorption du lithium. En particulier, la présente invention se rapporte à un nouveau procédé de préparation d'un matériau solide cristallisé et mis en forme, de préférence sous forme d'extrudés, de formule Li X x .2Al(OH) 3 ,n H 2 O avec n étant compris entre 0,01 et 10, x étant égal à 1 quand X est un anion choisi parmi les anions chlorure, hydroxyde et nitrate, et x étant égal à 0,5 quand X est un anion choisi parmi les anions sulfate et carbonate, comprenant une étape a) de précipitation de boehmite dans des conditions de température et de pH spécifiques, au moins une étape de mise en forme par malaxage basique ledit procédé comprenant également une étape de traitement hydrothermal finale, le tout permettant d'augmenter la capacité d'adsorption du lithium ainsi que la cinétique d'adsorption des matériaux obtenus par rapport aux matériaux de l'art antérieur lorsque celui-ci est utilisé dans un procédé d'extraction du lithium de solutions salines.
Abstract translation:本发明涉及锂吸附用固体材料领域。 具体而言,本发明涉及本发明的主题。 一个新的过程; 用于制备结晶固体物质和香料 并且优选以挤出物的形式成型为式Li x S 2 Al(OH)3,n H n, 2的范围为0.01至10,这等于 1,当X是选自氯离子,氢氧根和硝酸根阴离子的阴离子时,x是 0.5当X是选自硫酸根和碳酸根阴离子的阴离子时,包括在特定温度和pH条件下沉淀勃姆石的步骤a),至少一个步骤 基本捏塑整形工艺; 还包括最终的水热处理步骤,全部用于增加电容; 锂的吸附以及与使用现有技术的材料相比获得的材料的吸附动力学。 在游行中 从盐水溶液中提取锂。 p>
Abstract:
Process for preparing metal oxide granules having a particle diameter of 200 to 1500 µm, characterized in that a pyrogenic metal oxide powder selected from the group consisting of the oxides of Al, B, Ce, Cs, Er, Fe, In, Ga, Ge, Ni, Pb, Sn, Ta, Zr and/or Zn with a tamped density of 10 to 1200 g/l is compacted to slugs which are subsequently crushed and optionally classified, the slug fragments having a tamped density of 210 to 2000 g/1.
Abstract:
This invention provides a method for the production of amorphous metal containing compounds including the steps of providing a soluble crystalline salt of the metal in solid form; and reacting the soluble crystalline salt directly with an alkaline solution, without first dissolving the salt. A filterable and yet relatively very reactive, granular, amorphous-, and more particularly a pseudo-crystalline hydroxide or carbonate is obtained and which has substantially the same physical form as the salt. This provides for the easy separability of the granules from the solution. In addition, the porous nature of the amorphous product allows for the virtual complete removal of soluble by-products from the interior of the particles by efficient washing procedures, as a concentrated solution, which can be utilised for other purposes in an economical fashion.
Abstract:
A method for the agglomeration of alumina particles, the method comprising the steps of: grinding the alumina particles to a D50 of less than about 12 mu m; adding a quantity of a binding agent; andspray drying the mixture so formed to produce agglomerated granules.
Abstract:
Die Erfindung bezieht sich auf das Gebiet der Metallurgie und kann genutzt werden, um Aluminiumoxid, Siliciumdioxid und Pottasche aus Bauxit, Nephelin, Kaolin, Alunit, Flugasche der Kohleverbrennung und anderen aluminiumhaltigen Rohstoffen wie Tonen, Andalusit, Anorthosit, Dawsonit zu gewinnen. Bei der Verarbeitung der aluminiumhaltigen Rohstoffe wird nach der Zerkleinerung eine wässrige Suspension hergestellt. Der wässrigen Suspension werden oberflächenaktive Stoffe zugesetzt. Die weitere Verarbeitung erfolgt mittels verschiedener mechanischer und chemischer Einwirkungen. Die bei der Verarbeitung aluminiumhaltiger Rohstoffe entstehenden Produkte werden durch mechanische Verfahren in Suspensionen von Aluminiumhydroxid und Siliciumdioxid getrennt. Das entstehende Aluminiumhydroxid wird von Verunreinigungen gereinigt und einer Filtration, Wäsche und Kalzinierung unterzogen. Die wässrige Lösung von Pottasche wird eingedampft und kristallisiert. Das entstehende Siliciumdioxid wird von restlichen Verunreinigungen gereinigt und getrocknet. Es entstehen keine roten oder weißen Schlämme. Es werden keine Laugen oder anorganischen Säuren verwendet. Die Prozesse werden unter normaler Temperatur und Druck durchgeführt.
Abstract:
Slurry which contains a) from (50) to (80)% by weight of refractory particles having an average particle size of from (0.5) m to (150) m, b) from (5) to (35)% by weight of aluminium oxide particles having an average particle diameter of less than (300) nm and c) from (5) to (35)% by weight of water and d) a pH of from (5) to (12). Process for producing the slurry using a dispersion, and also the dispersion itself. Process for producing a casting mould, and also the casting mould itself.