Abstract:
Улучшенный способ измельчения материала в шаровой барабанной мельнице с повышенной эффективностью и качеством помола измельчаемого материала. В способе обработку перемалываемых частиц материала осуществляют интенсификатором помола в виде облака мелкодисперсных взвешенных частиц, размер 60 % которых составляет 1-60 мкм, внутри всех камер мельницы за счет потока воздуха, создаваемого аспирационной системой мельницы.
Abstract:
The present invention provides an aqueous pigment suspension in alkaline pH environment comprising: a) at least one particulate white pigment; b) at least one acrylic acid polymer, including salts thereof, having a weight average molecular weight Mw in the range from 1000 to 12,000 g/mol; c) at least one alkali metal silicate; and 10 in which the aqueous pigment suspension has a pH in the range from 10 to below and a solids content of at least 50 wt.-%, based on the total weight of the aqueous pigment suspension. The invention also includes a method of producing said aqueous pigment suspension. The invention also provides for a treatment system for producing a stable resistant aqueous pigment suspension resistant against bacterial growths, in which the aqueous pigment suspension comprises at least one particulate white pigment a pH in the range from 10 to below 12 and has a solids content of at least 50 wt-%, based on the total weight of the aqueous pigment suspension, and in which the treatment system comprises: A) at least one acrylic acid polymer, including salts thereof, having a weight average molecular weight Mw in the range from 1000 to 12,000 g/mol; B) at least one alkali metal silicate; and C) optionally sodium hydroxide and/or potassium hydroxide. The invention also includes the use of said treatment system for producing a stable bacterial resistant aqueous pigment suspension.
Abstract:
Embodiments of the present disclosure are related to multivesicular liposome formulations encapsulating zinc meloxicam complex microparticles. Methods of making the zinc meloxicam complex microparticles and administering the zinc meloxicam complex microparticles encapsulated in multivesicular liposome formulations and their use as medicaments are also provided.
Abstract:
This invention provides a process for reducing the average particle size of a granular material by a factor of at least 20 by: providing a mixing vessel equipped with (A) a high speed disperser and (B) a rotor stator mixer, providing a liquid medium to the mixing vessel, - switching on the high speed disperser (A) at a speed ranging from 1 to 50 m/s, - adding to the mixing vessel a granular material having an average particle size ranging from 1 to 5 mm, - operating the high speed disperser (A) for a period of time sufficient to reduce the average size of the granular material by a factor of at least about 10, thus producing granules of an intermediate average size ranging from 0.1 to 0.5 mm, and - switching on the rotor stator mixer (B) and operating it for a period of time sufficient to reduce the average size of the intermediate granules by a factor of at least about 2.
Abstract:
The invention relates to a method for grinding a carbonaceous solid, wherein a grinding additive is added before or during grinding, and the grinding additive, based on the dry mass, comprises 6% to 80% by weight of caprolactam and 1.5% to 30% by weight of aminocaproic acid, where, based in each case on the dry mass, 0.002% to 2% by weight of the grinding additive is used, based on the total amount of carbonaceous solid. Further claimed are a grinding additive and the use of a grinding additive for reducing the energy employed for a given grinding outcome and also for reducing the agglomeration tendency of the resultant product.
Abstract:
The present invention relates to a compression grinding process of at least one component of a hydraulic binder, said process comprising the compression of a bed of material (M) formed by this or these component(s) in a grinding zone (30), said process further comprising the addition of oil to the bed of material, via distribution means (66) located upstream of the inlet (32) to the grinding zone.
Abstract:
L'invention est relative à un procédé de broyage fin d'une charge de matière carbonée selon lequel on introduit la charge de matière carbonée, sous forme de particules de dimensions millimétriques ou microniques, en entrée d'une première chambre (5) de broyeur de type vibrant dont la sortie est reliée à l'entrée d'une deuxième chambre (7) de broyeur de type vibrant, la première et la deuxième chambres de broyeur vibrant comprenant chacune des corps de broyage logés de façon libre en son sein et adaptés pour broyer des particules, procédé selon lequel on met en vibration la première et la deuxième chambres de sorte à concasser les particules introduites d'une part entre les corps de broyage et d'autre part entre ceux-ci et la paroi interne périphérique de chaque chambre. Selon l'invention, on introduit en outre en entrée de la deuxième chambre de broyeur vibrant des additifs de matière minérale et/ou des additifs de matière végétale et/ou des additifs de matière d'origine végétale, les additifs étant sous la forme d'une poudre de dimension micronique.
Abstract:
L'invention concerne l'utilisation d'homopolymères et/ou copolymères hydrosolubles de l'acide acrylique et/ou méthacrylique avec un ou plusieurs monomères acryliques, vinyliques ou allyliques comme agent de dispersion et/ou d'aide au broyage de particules minérales en suspension aqueuse. L'invention concerne également lesdites suspensions aqueuses ainsi que leurs utilisations dans les domaines du papier, de la peinture et des matières plastiques.
Abstract:
Chemically aided milling of ceramic powders is disclosed. Carrier suspension, usually aqueous, of the ceramic powder may have added to it a dispersing agent and a passivating agent, followed by milling the aqueous suspension while continuously monitoring the pH, and as necessary, adding acid or a base to keep the pH within a desired range during milling. Real time monitoring allows milling with lower energy consumption, and enhances the desirable particle surfaces of the ceramic powder. The passivating agent can also be real time monitored and adjusted as necessary.