摘要:
The present invention provides a method of producing a granular product, the method comprising providing waste stone wool product of which at least 90% is in coherent form having minimum dimension at least 50 mm and which has a content of at least 10% water, by weight of the waste stone wool product; producing a base material from the stone wool by reducing the coherent stone wool to particulate form such that at least 80% by weight of the base material is in the form of particles having size not more than 40 mm, and has water content not more than 50 wt% based on the particulate base material; forming the particulate base material into granules, wherein at least 80% by weight of the granules have size not more than 40 mm, and subjecting the granules to sintering at a temperature in the range 900 to 1050 °C to form a granular product wherein at least 80% by weight of the granular product is in the form of granules having size not more than 40 mm, and during the operation of the method no binder is added. The present invention also relates to a product obtainable by the method described above.
摘要:
Embodiments of the invention enhance the performance of concrete mixtures, and have the flexibility to be used in both a variety of traditional poured concretes, as well as in sprayed concrete applications and geotechnical solutions which is commonly considered a cement application. It is an aspect of the present invention to provide a cementitious material comprising fly ash, wollastonite and nepheline syenite which is flexible enough in nature and chemistry to be used in a variety of concrete application which are poured and sprayed, as well as in blended into and within traditional cement applications. The use of a graduated blend of mineral fibers and industrial minerals also provide marked benefits to reduce both project cost and environmental impact.
摘要:
Shaped geopolymeric particles, fibers, and articles incorporating at least one geopolymer are provided; the geopolymeric particles, fibers, and articles having a structure that is solid, foamed, hollow or with one or more voids. Geopolymers are formed by alkali activation of an aluminosilicate and/or aluminophosphate material. The end-products are shaped as spheres, flakes, fibers, aggregates thereof or articles. Such products are formed at low temperatures; wherein forming includes processing using techniques such as spray drying, melt spinning, or blowing. The shaped geopolymeric particles and fibers have high chemical durability, high mechanical strength, application-targeted flowability and packing properties, and are specially suited for incorporating into composite materials, articles, and for use in cementitious, polymeric, pain:, printing, adhesion and coating applications. Shaped geopolymeric particles, fibers and articles having voids, hollow or foam-like structures are formed by adding one or more blowing agents.
摘要:
The material will find application in the buildings for heat insulation. It is environmentally clean; do not emit harmful substances when it is exposed to direct fire. It is recyclable and has high insulating efficiency. The composition includes the following components (in volume %) : - granulous heat-insulating material (perlite and/or expanded-clay aggregate) : (3 - 73), fibrous material (mineral wool and/or fibers) : (5 - 15), heat-resistant clay : (5 - 20); kaolin : (5 - 15), adhesive : (5 - 10); alumina : (2 - 70). It also comprises light cement (5-50) %. The method includes mixing of the components until a homogenous mass has been obtained. Simultaneously water is added, in the quantity of (5-17) (in volume %). The resulting mass is poured into molds, whereupon it is pressed and dried in a microwave oven. The finished products are taken out.
摘要:
Structure of inorganic solid material is mechanically broken, inorganic solid material including ammonia or one or more compound including nitrogen. The inorganic solid material is treated with fluid including water for hours and dried in order to reduce ammonia emission from the inorganic solid material thereafter.
摘要:
The apparatus for preparing a homogeneous silicate melt, intended for placing in a microwave oven, comprises a melting chamber (3) with an outlet (5) for the outflow of the melt into the superheating chamber (4), where the superheating chamber (4) consists of a vessel whose outlet (6) is arranged at the bottom of the vessel and is furnished with a raised overflow rim (7) situated with an offset below the lowest point of the outlet (5) of the melting chamber (3), while the outlet (6) from the superheating chamber (4) leads into a vertically or horizontally arranged oblong fiberizing tank (8) furnished with its own heating, in the bottom of which there is an outlet. The outlet (6) of the superheating chamber (4) in the direction of the fiberizing tank (8) can have an offset outlet rim ( 10). The outlet of the fiberizing tank (8) can consist of a set of nozzles (9) for drawing the continuous mineral or glass fibres. The melting chamber (3), superheating chamber (4) and fiberizing tank (8) are made of ceramic material, for example sintered alumina, or sintered alumina in combination with Si02. The nozzles (9) are formed of ceramic elements or elements made of ceramic metals, passing through and projecting from the bottom of the fiberizing tank (8). They can be made of a refractory ceramic material selected, for example, from the group comprising the oxides A1, Mg, Cr, Zr, the silicides Mo and the nitrides Si, W, Ti and A1. The nozzles 9 can be furnished with a means for heating them. The melting chamber (3) and superheating chamber (4) are positioned in a microwave oven in the area of the microwave radiation, while the fiberizing tank (8) with its own heating is arranged outside this area. The subject of the invention is also a method of uninterrupted production of continuous mineral or glass fibre where the crushed raw material, for example basalt, is exposed to microwave radiation at a frequency of 2450 MHz, whereby it is melted, the molten material, above the area of sedimentation of unmelted remains, continuously passes through into a separate space in which it is heated again by microwave radiation to a temperature of at least 200°C higher than the temperature of the liquidus melt, and from that space it flows continuously across the overflow rim into the column-shaped space beneath it, outside the area of operation of the microwave radiation, in which by electric or high-frequency heating the melt stabilizes at a temperature corresponding to the required viscosity, whereupon it is extruded into the outer space through at least one opening in the bottom, by means of hydrostatic pressure proportional to the overall depth of the melt above this bottom. The area of the openings in the bottom of the column-shaped space is heated to a temperature in the range of 1250 to 1700 C. A charge for the melting chamber (3) for preparing a silicate melt for the production of continuous mineral or glass fibre, which comprises crushed basalt of loose gravely consistency, can advantageously further include crushed recycle glass made from ordinary recycled bottle glass in quantities of 10 to 80% wgt., or 25 to 50% wgt. Or 2
摘要:
A flexible graphite sheet (100) exhibiting enhanced isotropy is provided. In addition, an apparatus, system and method for continuously producing a resin-impregnated flexible graphite sheet is also provided.