| 摘要 |
1518385 Controlling charging of blast furnace ISC SMELTING Ltd 12 April 1977 [30 April 1976] 17672/76 Heading F4B Signals representative of the pressure in the top of a blast furnace are utilized to detect a pressure pulse indicative of a charge falling from the charging hopper into the furnace, and absence of this pulse within a limited time from the opening of the bottom closure of the hopper is used to prevent the introduction of further charge material into the hopper, by preventing the re-opening of the top closure of the hopper. |
