摘要:
A furnace (70), and a method of firing it, wherein part of the fuel supplied to the furnace is produced from waste plastics by a depolymerisation process, waste heat from the furnace being used to promote the depolymerisation process. The furnace (70) is equipped with regenerators (80, 82) for waste heat recovery and is fired alternately in first and second opposed directions, with the direction of firing periodically reversing between the first direction and the second direction. The supply of fuel to the furnace (70) is temporarily interrupted while the direction of firing is reversing, means being provided to accommodate the fuel produced during the temporary interruption. The furnace may be used for producing glass.
摘要:
An apparatus and method of uniformly heating, rheologically softening, and thermoplastically forming metallic glasses rapidly into a net shape using a rapid capacitor discharge forming (RCDF) tool are provided. The RCDF method utilizes the discharge of electrical energy stored in a capacitor to uniformly and rapidly heat a sample or charge of metallic glass alloy to a predetermined "process temperature" between the glass transition temperature of the amorphous material and the equilibrium melting point of the alloy in a time scale of several milliseconds or less. Once the sample is uniformly heated such that the entire sample block has a sufficiently low process viscosity it may be shaped into high quality amorphous bulk articles via any number of techniques including, for example, injection molding, dynamic forging, stamp forging, and blow molding in a time frame of less than 1 second.
摘要:
A furnace, and a method of firing it, wherein part of the fuel supplied to the furnace is produced from waste plastics by a depolymerisation process, waste heat from the furnace being used to promote the depolymerisation process. The furnace is equipped with regenerators for waste heat recovery and is fired alternately in first and second opposed directions, with the direction of firing periodically reversing between the first direction and the second direction. The supply of fuel to the furnace is temporarily interrupted while the direction of firing is reversing, means being provided to accommodate the fuel produced during the temporary interruption. The furnace may be used for producing glass.
摘要:
The invention relates to a process for extracting at least a first chemical element E 1 from a material additionally comprising at least one oxide of a second chemical element E 2 chosen from silicon, iron, aluminium and calcium. This process comprises: the mixing, in the melt state, of said material with at least one oxide of a third chemical element E 3 , and/or at least one precursor of such an oxide in order to form a glass matrix comprising said first chemical element E 1 , - bringing said glass matrix, in the melt state, into contact with a liquid phase comprising a fourth chemical element E 4 , said fourth chemical element E 4 being a reducing agent capable of reducing said first chemical element E 1 , and - separating said liquid phase comprising said first chemical element E 1 from said glass matrix.
摘要:
A refractory object can include a beta alumina. In an embodiment, the refractory object is capable of being used in a glass fusion process. In another embodiment, the refractory object can have a total Al2O3 content of at least 10% by weight. Additionally, a Mg—Al oxide may not form along a surface of the refractory object when the surface is exposed to a molten glass including an Al—Si—Mg oxide. In a particular embodiment, a refractory object can be in the form of a glass overflow forming block used to form a glass object that includes an Al—Si—Mg oxide. When forming the glass object, the glass material contacts the beta alumina, and during the flowing of the glass material, a Mg—Al oxide does not form along the beta alumina at the surface.