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A kind of smelting method of phosphorus and copper alloy steel

A smelting method and alloy steel technology, applied in the field of alloy steel smelting, can solve the problem of high cost and achieve the effects of reducing smelting cost, reducing cost and increasing output

Active Publication Date: 2021-06-04
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a method for smelting phosphorus-containing and copper-alloyed steel, which solves the problem of high cost caused by adding metal alloys during smelting in the prior art

Method used

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  • A kind of smelting method of phosphorus and copper alloy steel
  • A kind of smelting method of phosphorus and copper alloy steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1, in the steelmaking process, molten iron with a higher phosphorus content is used, the weight of the molten iron is 38.0t, and the components of the molten iron are [C] 4.2%, [Si] 0.48%, [Mn] 0.40-0.56%, [P] 0.20 -0.28%, [S]0.01-0.023%, [Cu]0.008-0.012%, [V]0.008-0.011%, [Cr]0.008-0.01%, the rest is Fe and unavoidable impurities, T1300-1320℃. The amount of steel scrap added is 7t, including scrap copper, and the amount of scrap copper added is 130kg.

[0062] During the blowing process, add 1000kg of lime, 500kg of magnesium balls, 1640kg of manganese ore, and 525kg of chromium ore. Total blowing 14.0min, oxygen consumption is 2025m 3 . At the end of blowing, the molten steel temperature is 1640-1660°C, the carbon content is 0.10%, the phosphorus content is 0.098%, the slag basicity is 2.0, and the T.Fe content is 12%. After the end point of the converter (11-14.0min), strong blowing and stirring, the strength of bottom blowing gas supply is 0.13Nm 3 / (t·m...

Embodiment 2

[0066] In the process of steelmaking, molten iron with high phosphorus content is used. The weight of the molten iron is 40.0t. The composition of the molten iron is [C]4.1%, [Si]0.43%, [Mn]0.42%, [P]0.21%, [S]0.018 %, [Cu] 0.01%, [V] 0.008%, [Cr] 0.01%, the rest is Fe and unavoidable impurities, T1320℃. The amount of scrap steel added is 8t, including scrap copper, and the amount of scrap copper added is 140kg.

[0067] During the blowing process, add 1200kg of lime, 520kg of magnesium balls, 1800kg of manganese ore, and 460kg of chromium ore. Total blowing 13.6min, oxygen consumption is 2160m 3 . At the end of blowing, the molten steel temperature is 1648°C, the carbon content is 0.11%, the phosphorus content is 0.10%, the slag basicity is 1.9, and the T.Fe content is 11%. After the end point of the converter (11-14.0min), strong blowing and stirring, the bottom blowing gas supply intensity is 0.15Nm 3 / (t·min).

[0068] After the blowing is finished, 100kg of silicomanga...

Embodiment 3

[0071] In the steelmaking process, molten iron with a high phosphorus content is used. The weight of the molten iron is 37.0t, and the composition of the molten iron is [C]4.4%, [Si]0.52%, [Mn]0.45%, [P]0.25%, [S]0.019 %, [Cu] 0.01%, [V] 0.011%, [Cr] 0.01%, the rest is Fe and unavoidable impurities, T1310℃. The amount of steel scrap added is 7t, including scrap copper, and the amount of scrap copper added is 140kg.

[0072] During the blowing process, add 1350kg of lime, 460kg of magnesium balls, 1700kg of manganese ore, and 660kg of chromium ore. Total blowing 13.8min, oxygen consumption is 1987m 3 . At the end of blowing, the molten steel temperature is 1650°C, the carbon content is 0.13%, the phosphorus content is 0.093%, the slag basicity is 2.0, and the T.Fe content is 12%. After the end point of the converter (11-14.0min), strong blowing and stirring, the bottom blowing gas supply intensity is 0.12Nm 3 / (t·min).

[0073] After the blowing is finished, 103kg of silic...

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Abstract

The invention discloses a method for smelting phosphorus- and copper-containing alloy steel, which belongs to the technical field of alloy steel smelting and solves the problem of high cost caused by adding metal alloy during smelting in the prior art. The smelting method of the present invention comprises the following steps: step 1. using molten iron with a phosphorus content of more than 0.2% as raw material during converter smelting; step 2. adding scrap steel and scrap copper; step 3. controlling oxygen supply, final slag alkalinity, Increase the T.Fe content of the slag, and increase the bottom blowing stirring intensity at the end of the converter to perform dephosphorization; Step 4. During the tapping process, add alloys to adjust the content of other elements. The invention greatly reduces the smelting cost of phosphorus and copper alloy steel.

Description

technical field [0001] The invention belongs to the technical field of alloy steel smelting, in particular to a method for smelting phosphorus- and copper-containing alloy steel. Background technique [0002] Atmospheric corrosion-resistant steel is to add Cu, P, Cr and other elements to ordinary steel, so that it has good corrosion resistance in the atmosphere, and has good forming and welding performance. It has been widely used in containers, railway vehicles, and seaport buildings. industry. [0003] Atmospheric corrosion-resistant steel is usually smelted in converters and electric furnaces. After blowing molten steel, alloys such as ferrophosphorus, red copper, low-carbon ferrochrome, and ferromanganese are added to the steel, such as Chinese patent (application number 201810044251. its preparation method). The disadvantage of this method is that the price of the added alloy is relatively high, and the production cost of steel increases by about 200 yuan per ton. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22C38/20C22C38/02C22C38/04C22C38/24C21C5/35
CPCC21C5/35C22C33/06C22C38/002C22C38/02C22C38/04C22C38/20C22C38/24Y02P10/20
Inventor 吴伟高琦赵进宣崔怀州梁强林路
Owner CENT IRON & STEEL RES INST
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