摘要:
Methods for pretreating and improving coking coal quality for producing blast-furnace coke by: (a) rapid-heating the coal charge in a fluidized-bed to a temperature range between not lower than 300° C. and not higher than the temperature at which the coal charge begins to soften, at a rate of 30 to 103 ° C./min., (b) classifying the rapid-heated coal charge to fine- and coarse-size coal, and then (c-1) briquetting the fine-size coal or (c-2) rapid-heating the fine- and coarse-size coal individually in a pneumatic preheater to a temperature range between not lower than 300° C. and not higher than the temperature at which the coal charge begins to soften, at a rate of 103 to 105 ° C./min., and (d) forming the fine-size coal.
摘要:
In a flexible laminate containing a metal foil layer/a thermoplastic polyimide layer or/and a conductor circuit layer/a thermoplastic polyimide layer, the metal foil layer or the conductor circuit layer is bonded to at least one side of the thermoplastic polyimide layer. The thermoplastic polyimide layer is formed from a thermoplastic polyimide resin film or sheet produced by melt extrusion of a thermoplastic polyimide resin. Alternatively, the thermoplastic polyimide layer is formed from a biaxially oriented thermoplastic polyimide resin film or sheet. Such a flexible laminate can be easily manufactured by a lamination method which comprises bonding a thermoplastic polyimide resin film (1) to a metal foil (2) or a conductive circuit layer (4) by heating under pressure, and has excellent heat resistance, electrical properties and mechanical strength inherent in a polyimide. When the biaxially oriented thermoplastic polyimide resin film or sheet is used, the flexible laminate can be improved in dimensional stability and resistance to soldering heat.
摘要:
An unsaturated monocarboxylic ester compound has at least two structures represented by the following general formula (1): wherein R1 represents a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, and R2, R3 and R4 independently represent a hydrogen atom, an alkyl group of 1 to 6 carbon atoms, an aryl group, an aralkyl group, a cyano group, a fluorine atom, or a furyl group. A curable composition comprises (A) the unsaturated carboxylic ester compound having two or more structures represented by the general formula (1) mentioned above, (B) a polymerization initiator, and optionally (C) a diluent.
摘要:
An unsaturated monocarboxylic ester compound has at least two structures represented by the following general formula (1): wherein R1 represents a hydrogen atom or an alkyl group of 1 to 6 carbon atoms, and R2, R3 and R4 independently represent a hydrogen atom, an alkyl group of 1 to 6 carbon atoms, an aryl group, an aralkyl group, a cyano group, a fluorine atom, or a furyl group. A curable composition comprises (A) the unsaturated monocarboxylic ester compound having two or more structures represented by the general formula (1) mentioned above, (B) a polymerization initiator, and optionally (C) a diluent.
摘要:
An unsaturated polyester compound having an ethylenically unsatureated group in its terminal and hydroxymethyl group in its side chain is obtained by the reaction of (a) a compound containing at least two oxetane rings in its molecule with (b) a compound containing at least two carboxyl groups in its molecule and (c) an unsaturated monocarboxylic acid in the presence of a reaction promotor in such a proportion that the ratio of said compound (b) to said compound (a) falls in the range of 0.1
摘要:
A blast furnace coal is produced by rapidly heating a coal blend having 10 to 30% by weight of a non-slightly-caking coal having softening initiation temperature T with the balance including a caking coal having softening initiation temperature T.sub.0 (T.sub.0 .ltoreq.T +40.degree. C.) at a rate of 1.times.10.sup.3 to 1.times.10.sup.6 .degree. C./min to a temperature region from (T -60.degree. C.) to (T +10.degree. C.) wherein T represents the softening initiation temperature of the non-slightly-caking coal; or rapidly heating a non-slightly-caking coal having softening initiation temperature T and a caking coal having softening initiation temperature T.sub.1 separately at a rate of 1.times.10.sup.3 to 1.times.10.sup.6 .degree. C./min to a temperature region from (T -100.degree. C.) to (T +10.degree. C.), wherein T represents the softening initiation temperature of the non-slightly-caking coal, or a temperature region from (T.sub.1 -100.degree. C.) to (T.sub.1 +10.degree. C.), wherein T.sub.1 represents the softening initiation temperature of the caking coal, blending the heated non-slightly-caking coal with the heated caking coal to prepare a coal blend having 10 to 30% by weight of the non-slightly-caking coal with the balance including the caking coal; and charging the coal blend into a coke oven where the coal blend is carbonized.
摘要:
In the cooling wall of a regenerative cooling rocket combustion chamber, the throat portion thereof in which the heat load is highest is formed of a porous material having a perspiring cooling action. The other portion in which the heat load is relatively low is designed to be cooled by conventional forced convection. By such a composite cooling system, a high cooling effect is provided and yet the pressure loss in the cooling passages is small and light weight and long life of the engine are attained concurrently.