摘要:
Moulded articles are produced by heating expandable graphite, in which the expandable graphite is first pre-expanded at 140.degree. to 450.degree. C. until a bulk density of 30 to 500 g/l has been reached, at least 50% by volume of a mould is then filled with the graphite thus pre-expanded, and the expansion of the graphite is then completed in the mould by heating to temperatures in the range from 300.degree. to 700.degree. C.
摘要:
The invention concerns a method for the operation of an underwater powerplant comprising a water turbine for purposes of absorbing kinetic energy from a flow of water; an electrical generator with converter feed, whose generator rotor is connected in a torsionally rigid manner with the water turbine, wherein the invention is characterised in that in normal operation a first frequency converter is used for purposes of converter feed, and in the braking operation at least one second frequency converter, or one component of a second frequency converter, is connected into the circuit and synchronised with the first frequency converter, in order to execute with the latter in a combined manner a converter feed to the electrical generator, which generates a generator torque braking the water turbine.
摘要:
The specification describes a composition curable by high-energy radiation in the presence of oxygen which contains conventional monomers, oligomers and/or polymers curable by high-energy radiation besides minor amounts of a natural wax, a solvent extraction product of a natural wax, a wax alcohol, a wax ester and/or a wax carboxylic acid. The specification also describes the preparation of said composition and the use thereof in the formation of coatings.
摘要:
Nitric acid esters of monosaccharides and/or polysaccharides can be used as ignition improvers for alcoholic fuels for internal combustion engines.
摘要:
An electric arc furnace, signal processing device, storage medium, machine-readable program code, and method for determining a time for charging (e.g., recharging) an electric arc furnace with material to be melted (e.g., scrap) are provided. The electric arc furnace may include electrode(s) for heating material inside the electric arc furnace by an electric arc. By detecting a signal for determining a phase state of an electric arc root on the side of the material to be melted based on a captured electrode current, by checking whether the signal exceeds a predetermined threshold value for a predetermined minimum duration, and by ensuring that the charging time is reached at the earliest when the signal exceeds the predetermined minimum duration threshold value, a state-oriented charging time for an electric arc furnace can be determined to reduce energy use, resource use, and production time for a production cycle to reach a tap weight.