A high lance position vacuum refining method based on cluster top lances
A technology of vacuum refining and top gun, which is applied in the field of secondary smelting, can solve the problems that restrict the development and limitation of RH refining process, and achieve the effect of improving penetration depth and stirring intensity, uniform composition and temperature, and long supersonic jet flow
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Embodiment 1
[0055] A high-lance vacuum refining method based on cluster top lances, including the use of process equipment consisting of a ladle, a vacuum chamber, a cluster top lance and a vacuum device, inserting the dipping tube of the vacuum chamber into the molten steel in the ladle, and the top lance Insert the vacuum chamber through the sealed channel, the vacuum device keeps the pressure on the surface of the molten steel in the vacuum chamber in a low pressure state, the lifting gas is introduced into the ascending dipping tube to make the molten steel circulate between the vacuum chamber and the ladle, and oxygen is introduced into the top lance , powder, gas and other media.
[0056] Among them, the cluster top gun has a powder channel in the center, a main oxygen channel located on the periphery of the powder channel, and a secondary oxygen channel located on the periphery of the main oxygen channel; during RH vacuum refining, oxygen and powder are blown into the vacuum tank th...
Embodiment 2
[0071] Such as Figure 5 to Figure 7 As shown, the difference between this example and Embodiment 1 is that the positioning ridge 9 as a positioning structure is arranged on the inner surface of the nozzle outer tube 2, as Image 6 with Figure 7 As shown, there are 3 or more grooves evenly distributed along the circumference on the inner wall of the equal-diameter circular hole section; the grooves of the outer tube 2 of the nozzle and the cylindrical outer contour of the core tube 1 of the nozzle form a porous annular groove-shaped gas channel 8, The outer contour surface corresponding to the nozzle core tube 1 and the central hole 2a of the nozzle outer tube 2 is a cylindrical surface, the diameter of the cylinder of the nozzle core tube 1 is equal to the diameter of the cylinder hole of the nozzle outer tube 2, and the nozzle core tube 1 is inserted into the nozzle In the annular groove gap formed behind the central hole 2a of the outer tube 2, the total void area at the ...
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