Abstract:
A porous refractory body, primarily a porous plug for the refractory lining of a vessel containing molten metal through which plug gas can be blown into the metal. This body has a cold crushing strength of not less than 200 kg/cm2 and consists of a coarse-grained refractory material with a minimum quantity of a suitable binding agent, and has permeable pores of a cross section not less than 0.05 mm and a gas permeability of at least 100, and preferably more than 500 nanoperm. The hot bending strength or modulus of rupture of the body at 1,400* C is from 20 - 60 kg/cm2. The refractory material is mixed with the binding agent, and the mixture is compressed with a pressure of at least 300 kg/cm2 before firing to bring substantially all of the grains into contact with adjacent grains.
Abstract translation:一种多孔耐火体,主要是用于容纳熔融金属的容器的耐火衬里的多孔塞,塞子气体可以通过该熔融金属吹入金属中。 本体具有不小于200kg / cm 2的冷压碎强度,由具有最小量的合适粘合剂的粗粒耐火材料组成,并且具有不小于0.05mm的横截面的渗透孔和气体 渗透率为100以上,优选为500纳米以上。 身体在1400℃时的热弯曲强度或断裂模量为20〜60kg / cm2。 将耐火材料与粘合剂混合,并在烧制之前以至少300kg / cm 2的压力压缩混合物,以使基本上所有的颗粒与相邻的颗粒接触。
Abstract:
A silencer comprising one or more sound-absorbing parts of ceramic material. The ceramic material is porous and the sound-absorbing parts are self-supporting and have a specific resistance to air flow of 10.sup.3 -10.sup.7 Pas/m.sup.2 and a compression strength of at least 40 kN/m.sup.2, preferably at least 400 kN/m.sup.2.
Abstract translation:一种消音器,包括一个或多个陶瓷材料的吸声部分。 陶瓷材料是多孔的,吸声部分是自支撑的,并且具有103-107Pas / m 2的空气流动的特有阻力,并且压缩强度至少为40kN / m 2,优选至少为400kN / m 2。
Abstract:
A honeycomb filter includes a tubular honeycomb structure having porous partition walls with which there are formed a plurality of cells extending from one end surface to the other end surface to become through channels of a fluid; and plugged portions arranged in one open end portion of each of predetermined cells and the other open end portion of each of the remaining cells, porosities of the partition walls are 46% or less, a pore volume ratio of pores having pore diameters of 40 μm or more is 7.5% or less, and a pore volume ratio of pores having pore diameters of 10 μm or less is 25% or less, a permeability of the honeycomb structure is 0.8 μm2 or more, and a coefficient of thermal expansion of the honeycomb structure in a range of 40 to 800° C. is 1.0×10−6/° C. or less.
Abstract:
A gas-permeable thermal insulator comprising a porous ceramic body of a three-dimensional reticulate structure having interconnected open cells is adapted to be installed in a heating oven or radiant tube so that exhaust gas passes through the insulator to exit the oven or tube while the waste heat of the gas is effectively recovered for reuse. The porous ceramic body is characterized by a bulk specific gravity of 0.25-0.6, an average pore diameter of 0.2-10 mm, a porosity of 75-95%, and an air pressure drop of 0.1-40 mm in water column when air passes through the body over a thickness of 1 cm at a velocity of 1 m/sec.
Abstract:
Cement compositions containing a hydraulic cement, a synthetic phyllosilicate (e.g. Laponite®), and silica flour. The cement compositions may optionally include other additives such as an expandable agent, a defoamer, and a fluid loss controller. Cement slurries and wellbore cements made therefrom are also specified. The inclusion of the synthetic phyllosilicate has enhanced the mechanical strength, improved the density homogeneity, as well as decreased the permeability of the wellbore cement, making it suitable for cementing oil and gas wells under high pressure and high temperature (HPHT) conditions.
Abstract:
A superduty fireclay refractory brick with at least 33 to 43 per cent by weight Al.sub.2 O.sub.3 and 1 to 3 per cent by weight alkali oxide for use as a large-format bottom block in a solder plating bath in furnaces for manufacturing flat glass according to the float technique has a compressive strength of 35 to 60 N/mm.sup.2 and a gas permeability of less than 4 nPm. The brick possesses an open porosity of approx. 20 to 25 per cent by volume, a gas permeability of less than 3 nPm, preferably 0.5 to 2 nPm, and a hydrogen diffusion of less than 150 mm H.sub.2 O, preferably 30 to 100 mm H.sub.2 O.
Abstract translation:一种超级耐火耐火砖,其具有至少33至43重量%的Al 2 O 3和1至3重量%的碱金属氧化物,用作根据浮子制造平板玻璃的炉中的焊接电镀浴中的大型底部块 技术的抗压强度为35〜60N / mm 2,气体渗透性小于4nPm。 砖具有大约的开放孔隙度。 20至25体积%,小于3nPm,优选0.5至2nPm的气体渗透性和小于150mm H 2 O,优选30至100mm H 2 O的氢扩散。
Abstract:
Corps de filtre ayant un corps (1) composite, autoporteur et à pores ouverts, qui entoure un corps de support (3) à pores grossiers, composé de gros grains (7) liés à un matériau étranger ou intrinsèque et d'un diaphragme (4) à pores fins, appliqué à une surface externe du corps de support (3) et contenant des grains fins liés à un matériau étranger ou intrinsèque, dans lequel, afin de simplifier la fabrication et pour obtenir une résistance plus élevée aux sollicitations, le diaphragme (4) contient en plus des grains fins (8) et un liant, des fibres (9) dont le diamètre absolu est entre 0,3 et 30 microns, leur longueur étant au moins 10 fois celle de leur diamètre et les fibres mesurant au moins 10 microns de longueur; le pourcentage de grains fins, de fibres et de liants par unité de volume est (60-40) : (40-20) : (30-10); le rapport de l'épaisseur du corps de support (3) à l'épaisseur du diaphragme (4) est entre 5 : 1 et 75 : 1; l'épaisseur absolue du diaphragme (4) est entre 0,2 et 2 mm et le rapport des perméabilités spécifiques du corps de support (3) et du diaphragme (4) pour les fluides dans la plage d'écoulement laminaire étant entre 2 : 1 et 100 : 1. De plus, on propose un procédé pour la production d'un tel corps de filtre.