| 摘要 |
1,145,409. Blowpipe burners. ESSO RESEARCH & ENG. CO. 15 Aug., 1967 [24 Aug., 1966], No. 38027/66. Heading F4T. In the melting of scrap steel a comburant is supplied to one or more passages 2 of a lance head 1, each passage having a Venturi insert 3 provided with holes 4 communicating with an annular passage 5 through which fuel is supplied to the comburant via a supply pipe 6 and non- return valve 7. A cooling medium such as water is supplied to a space 11. |
