Impurity Control and Disposal in Hydrometallurgical Processes PDF Download
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Author: Metallurgical Society of CIM
Publisher: Metallurgical Society of the Canadian Institute of Mining, Metallurgy and Petroleum = La Société de la métallurgie de l'institut canadien des mines, de la métallurgie et du pétrole
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 416
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Book Description
Author: Metallurgical Society of CIM
Publisher: Metallurgical Society of the Canadian Institute of Mining, Metallurgy and Petroleum = La Société de la métallurgie de l'institut canadien des mines, de la métallurgie et du pétrole
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 416
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Book Description
Author: Hydrometallurgy Section, Metallurgical Society, Canadian Institute of Mining and Metallurgy
Publisher:
ISBN:
Category :
Languages : en
Pages : 650
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Book Description
Author: Canadian Institute of Mining and Metallurgy. Hydrometallurgy Section
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 398
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Taekyun Chung
Publisher:
ISBN:
Category :
Languages : en
Pages : 154
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(cont.) There appear to be two general flow patterns of impurities through the core plasma: Outboard launched impurities enter the core at the outside edge and flow out of the core on the inboard edge; Divertor launched impurities enter the core just outboard of the x-point and return to the divertor just inboard of the x-point. The study of non-recycling impurities was also carried out and it was found that the penetration factor (PF) for outboard-launched impurities (Carbon was used as the prototype) were a factor of 3 times more likely to reach the core than inboard-launched impurities (experimental result gave the ratio as 20). Increasing the background SOL plasma flow to the experimental levels doubles the model ratio and other factors capable of reducing the discrepancy are studied. Thus the experimental poloidal variation in PF is qualitatively reproduced. Values of PF for recycling impurities (a global quantity) matched the experimental magnitudes when experimental values for SOL flow were used.
Author: Bernard Terreault
Publisher:
ISBN:
Category :
Languages : en
Pages : 92
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Author: Metallurgical Society of CIM. Hydrometallurgy Section
Publisher: [Montréal?] : Hydrometallurgy Section, Metallurgical Society, Canadian Institute of Mining and Metallurgy
ISBN:
Category : Factory and trade waste
Languages : en
Pages :
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Author:
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ISBN:
Category :
Languages : en
Pages : 15
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The vacuum vessel of the Advanced Toroidal Facility (ATF) is Ti-gettered with a surface coverage of 70%. The major effects of gettering are: (1) reduction of the oxygen, carbon, and nitrogen content in the plasma and (2) improved density control due to wall pumping of the working gas hydrogen. The overall leak rate in ATF is 2 x 10−4 Torr-l/s which is too high for successful plasma operation. Ti-gettering is routinely employed every morning prior to operation and compensates for this shortcoming by reducing the partial pressure of nitrogen and other residual gas components to the low 10−9 Torr range which is close to the RGA background pressure. Rate-of-rise measurements at this stage show only argon and some methane. The argon is used to monitor the leak rate. In addition to impurity reduction, gettering leads to low recycling of the working gas which appears to be crucial for density control in ATF. The capacity of the gettered surface is large enough to show a strong effect even after 24 hours. An extensive data base on the short-term and long-term effects of gettering on the residual gas composition and its effects on plasma performance has been established over the past three years and will be discussed in this paper. 9 refs., 7 figs.
