Method for smelting molybdenum-containing stainless steel
A technology of stainless steel and content, applied in the field of smelting molybdenum-containing stainless steel and using molybdenum oxide powder to directly smelt molybdenum-containing stainless steel, can solve the problem of high cost and achieve the effect of reducing raw materials, reducing production cost and simplifying production process
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Embodiment 1
[0062] Example 1: Method for Smelting Molybdenum-Containing Stainless Steel by Blast Furnace Hot Metal Injection
[0063] (1) Molybdenum oxide powder is added to the feed tank, and the pressure of the feed tank is 0.2±0.02MPa; 95% of the molybdenum oxide powder in the raw material has a particle size of less than 1mm, and the molybdenum content in the molybdenum oxide powder is 60.8%;
[0064] (2) Use high-pressure nitrogen as the carrier gas, the carrier gas pressure is 0.6±0.02MPa, and the carrier gas flow rate is 60±3Nm 3 / h, the molybdenum oxide powder is transported to the fluidized bed to realize the fluidization of the molybdenum oxide powder;
[0065] (3) Molybdenum oxide powder enters the rotor feeder, and the injection speed is controlled by the rotor feeder;
[0066] (4) Add iron
[0067] Mix the blast furnace molten iron into the injection treatment tank, the mixing amount is 68±2 tons, remove the blast furnace slag, the slag thickness is required to be ≤30mm, a...
Embodiment 2
[0084] Embodiment 2: The method for smelting molybdenum-containing stainless steel by injection of stainless steel mother liquor
[0085] (1) Molybdenum oxide powder is added to the feeding tank, and the pressure of the feeding tank is 0.2±0.02MPa; the particle size of 95% of the molybdenum oxide powder in the raw material is less than 1mm, and the molybdenum content in the molybdenum oxide powder is 60.2%;
[0086] (2) Use high-pressure nitrogen as the carrier gas, the carrier gas pressure is 0.6±0.02MPa, and the carrier gas flow rate is 80Nm 3 / h, the molybdenum oxide powder is transported to the fluidized bed to realize the fluidization of the molybdenum oxide powder;
[0087] (3) Molybdenum oxide powder enters the rotor feeder, and the injection speed is controlled by the rotor feeder;
[0088] (4) Pre-melt mixed with steel: The stainless steel mother liquid is smelted in an electric furnace and tapped into the ladle. The distance from the upper edge of the mouth i...
Embodiment 3
[0107] Embodiment 3: Method for smelting molybdenum-containing stainless steel by spraying stainless steel mother liquor
[0108] (1) Molybdenum oxide powder is added to the feed tank, and the pressure of the feed tank is 0.2±0.02MPa; the particle size of 95% of the molybdenum oxide powder in the raw material is less than 1mm, and the molybdenum content in the molybdenum oxide powder is 60.3%;
[0109] (2) Use high-pressure nitrogen as the carrier gas, the carrier gas pressure is 0.6±0.02MPa, and the carrier gas flow rate is 80Nm 3 / h, the molybdenum oxide powder is transported to the fluidized bed to realize the fluidization of the molybdenum oxide powder;
[0110] (3) Molybdenum oxide powder enters the rotor feeder, and the injection speed is controlled by the rotor feeder;
[0111] (4) Pre-melt mixed with steel: The stainless steel mother liquor is smelted in an electric furnace and tapped into the ladle, with a steel output of 165±3 tons, and the electric furnace sl...
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