Patent ID: 7550109

Claim:
A double chamber single directional spiral tuyere for blast furnaces, comprising a body unit ( 100 ), a spiral unit ( 200 ) and a cover unit ( 300 ), with a body chamber comprising a body main passage ( 110 ) and a body nose passage ( 120 ) defined in the body unit ( 100 ), and a nose chamber comprising a first spiral passage ( 210 ), a second spiral passage ( 220 ), a third spiral passage ( 230 ) and a fourth spiral passage ( 240 ) defined in both the spiral unit ( 200 ) and the cover unit ( 300 ), further comprising: a tunnel ( 250 ) supplying a nose cooling water from nose inlet ( 3 ) directly to the first spiral passage ( 210 ), wherein the body nose passage ( 120 ) of the body chamber is configured as circular passages, thus improving cooling performance in the nose of the body unit ( 100 ).