摘要:
To provide a tin oxide refractory which prevents volatilization of SnO2 in a high temperature zone from an early stage and which also has high erosion resistance to glass.A tin oxide refractory comprising SnO2, SiO2 and ZrO2 as essential components, wherein the total content of SnO2, SiO2 and ZrO2 in the tin oxide refractory is at least 70 mass %, and, based on the total content of SnO2, SiO2 and ZrO2, the content of SnO2 is from 32 to 98 mol %, the content of SiO2 is from 1 to 35 mol % and the content of ZrO2 is from 1 to 35 mol %.
摘要:
An electrode seal for use in a metallurgical furnace, the furnace comprising a furnace space heated by electrodes extending through an aperture into the furnace space. The electrode seal comprises at least three sets of shoes in consecutive lateral contact, each shoe having a biasing member for biasing a surface of the shoe toward one of the electrodes thereby allowing the one electrode to longitudinally move within the electrode seal while providing electrical insulation between the electrode and the aperture.
摘要:
Hydrophobic aggregates for use in refractory castables and gunning mixtures and methods of their preparation. The aggregates here are formed by crushing insulating fire brick and coating the resulting particles with a hydrophobic component. The hydrophobic component may be a polydimethylsiloxane having a terminal silanol group. As a result of the coating process, the coated aggregate has very low levels of alkalis. The aggregates may be used to form refractory castables that do not undergo substantial alkaline hydrolysis due to the reduced levels of alkalis. The castables made from these aggregates display superior physical properties, including lower water content, lower permanent linear change, high strength, and superior thermal conductivity/insulation properties, while at the same time possessing lower density and requiring less water to be used during castable formation. These improved properties also are observed in gunning mixtures formed from these aggregates.
摘要:
An unshaped product including a particulate mixture containing: a coarse fraction, representing >50% 1 mm, in mass percentage based on particulate mixture, matrix fraction having a chemical analysis, in mass percentage based on oxides of matrix fraction, such: Al2O3+SiO2+ZrO2>86%, providing 35%
摘要:
Refractory checker brick modules for glass furnace regenerators are provided which include multiple preformed refractory checker bricks (e.g., tubular checker bricks, cruciform checker bricks, interweave checker bricks, interlock checker bricks, pigeon-hole checker bricks, basket weave checker bricks and the like) stacked in multiple off-set courses to form a honeycomb structure thereof, the checker bricks in the module being bonded to one another by a bonding agent.
摘要:
A flame-retardant batch, and the use thereof, primarily contains—at least 30% by weight of a coarse-grain olivine raw material with a forsterite content of, e.g. at least 70% by weight and having grain sizes of, e.g. 100% by weight over 0.1 mm, —at least 35% by weight in magnesia in meal form with grain sizes of, e.g. 100% by weight.
摘要:
A particulate composition for use in alumina-magnesia spinel forming dry vibratable mixtures may include, based on the total weight of the particulate composition, from 95 to 99.9 wt % of a mixture of particulate Al2O3 and particulate MgO, and from 0.1 to 5 wt % binding agent, wherein at least a portion of the particles of said mixture of particulate Al2O3 and particulate MgO is present in the particulate composition as a coating of particles on the surface of other particles. Methods of producing and using the particulate composition are also described.
摘要翻译:用于氧化铝 - 氧化镁尖晶石形成干式可振动混合物的颗粒组合物可以包含基于颗粒组合物的总重量为95-99.9重量%的Al2O3和颗粒MgO的混合物和0.1-5重量% 其中颗粒状Al 2 O 3和颗粒状MgO的所述混合物的颗粒的至少一部分作为其它颗粒表面上的颗粒涂层存在于颗粒组合物中。 还描述了生产和使用颗粒组合物的方法。
摘要:
The invention relates to a blend for the production of a sintered refractory material containing chromium oxide, a sintered refractory material containing chromium oxide, a method for the manufacture of a sintered refractory material containing chromium oxide and to a use of magnesium titanate.
摘要:
A chemical reactor and a method for arranging a ceramic barrier in a gasifying reactor, which reactor is arranged to convert high energy organic waste of black liquor type with a large amount of organic or inorganic alkali metal compounds, by high temperature oxidation with air or oxygen, whereby the organic waste is converted to a hot reducing gas containing a considerable amount of water vapour and the inorganic compounds form an alkali-containing salt melt at a temperature of 750-1150° C., and which reactor is arranged to comprise an outer shell (14) with associated inlet and outlet devices for reactants and products, the method comprising the arranging of a lining (16, 18) comprising one or more layers of ceramic barriers (16, 18) on the inside of the shell (14), the innermost ceramic barrier (16) of the reactor being composed of a lining material that primarily contains compounds of aluminium oxide (Al2O3), and at least one of alkali metal oxides (Me2(I)O) and alkaline earth metal oxides (Me(I)0), forming compounds of the type Me2(I)O Al2O3 and Me(II)0-Al2O3.
摘要:
An object of the invention is to provide, in porous thermal insulating firebricks formed by molding and drying bubble-containing slurry obtained by foaming slurry containing a fire resistant powder and water, a thermal insulating firebrick superior in thermal insulating property in spite of the same composition and porosity.A porous thermal insulating firebrick formed by molding and drying bubble-containing slurry obtained by foaming slurry containing a fire resistant powder with a heat resistant temperature of 1,000° C. or higher and water has the porosity of 60% or more, and 80% or more volume with respect to a total pore volume of the inside of the thermal insulating firebrick consists of pores having a pore size of 200 μm or less.