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公开(公告)号：EP3763682A1
公开(公告)日：2021-01-13
申请号：EP19186021.2
申请日：2019-07-12
摘要： Described is a process for the refinement of a quartz powder, comprising the step of separating microparticles of refractory minerals, in particular minerals containing rare earth metal compounds, from the quartz powder by an elutriation step.
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公开(公告)号：EP3656744A1
公开(公告)日：2020-05-27
申请号：EP18207950.9
申请日：2018-11-23
发明人： Mundy, Alan , Sayce, Ian George , Gromann, Boris
摘要： A method and apparatus for manufacturing a quartz glass ingot of large cross-sectional area by drawing solftened quartz glass mass through a die and on-line cutting to a specific length, whereby on-line crack-free cutting of the ingot is ensured by using the internal heat of the ingot to permit equilibration of the internal and surface temperatures while passing through one or more annealing chambers, thus ensuring controlled cooling to temperature at which it is possible to cut the ingot with a water-cooled saw.
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公开(公告)号：EP3656746A1
公开(公告)日：2020-05-27
申请号：EP18207949.1
申请日：2018-11-23
发明人： Mundy, Alan , Aghajani, Hamed , Sayce, Ian George
摘要： The present invention relates to a continuous method for the production of hollow quartz-glass ingots 18 and an apparatus for said method, whereby the hollow quartz-glass ingots are drawn then actively cooled on the internal surface e.g. with water sprays 33 before being cut at cutting station 20.
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