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Improvements in or relating to a hot top for ingot molds and a method of hot toppingsteel ingots
Improvements in or relating to a hot top for ingot molds and a method of hot toppingsteel ingots
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机译：锭模热顶的改进或相关方法以及钢锭热顶方法
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708,599. Ingot moulds. ROLLINSON, E. W. (Ferro Engineering Co.). June 24, 1952, No. 15862/52. Class 83 (1) A hot top for ingot moulds comprises a metal casing and a refractory lining consisting of a semi-permanent firebrick layer of low heat conductivity and low heat capacity protected from thermal shock and mechanical blows by a singlelife refractory veneer. of about half an inch in thickness, preferably moulded in situ. The metal casing comprises an upper section 13 with an inwardly projecting upper ledge 16 and a lower section 14 with an inwardly projecting lower ledge 15 on which is supported the semi-permanent insulating layer comprising upper and lower courses 18, 17 of porous firebrick. A single-life refractory ring 20 is suspended beneath the metal casing by metal clips 21 intended to fail when the hot metal is poured or when the hot top is stripped. The ring 20 and the ledge 16 extend inwardly beyond the firebrick courses 17, 18 by about half an inch and act as guides to determine the thickness of the moulded layer 22. The lower face of the ring 20 is preferably conical, Fig. 2, but may be of rectangular section 20SP1/SP, Fig. 3. Weight-saving pockets 35, 36 formed in the sections 13, 14 communicate by grooves 37 with passages 38 for venting gases generated within the layer 22 during pouring and passing through the porous bricks 17, 18.
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