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Measurement of the active oxygen tonnage in the hot water due to decompression ladle degassing modulo and the trace oxygen tonnage of atmosphere inside the decompression tank and control manner
Measurement of the active oxygen tonnage in the hot water due to decompression ladle degassing modulo and the trace oxygen tonnage of atmosphere inside the decompression tank and control manner
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机译：减压钢包脱气模量引起的热水中活性氧吨位的测定及减压罐内大气痕量氧吨位的测定及控制方式
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摘要
PROBLEM TO BE SOLVED: To adjust a total oxygen amount in a molten cast iron by measuring active oxygen quantity in the molten cast iron before a ladle is inserted into a reduced- pressure tank, reducing a pressure in the reduced-pressure tank after the ladle is inserted thereinto and measuring the total oxygen amount in the molten cast iron and trace oxygen in an atmosphere in the reduced-pressure tank. SOLUTION: A liquid metal 2a of cast iron or the like is put in the ladle 2 from a melting furnace 1. An oxygen sensor A1 provided in an arithmetic type recorder A is inserted into a liquid metal 3a in the ladle 3 and active oxygen quantity and a liquid metal temperature are checked. The ladle 4 is inserted into the reduced- pressure tank C and a pressure in the tank is adjusted so as to be a predetermined pressure by a vacuum pump. Trace oxygen in an atmosphere in the reduced tank C is controlled by a control unit E using a zirconia ceramic sensor E1. Oxygen quantity in a liquid metal 4a in the ladle 4 is controlled by an oxygen sensor 2. All measurement are input to a control section F and a liquid metal 5a is poured into a mold 6 at a point when conditions are adjusted so that an ultra-thin cast iron can be produced.
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