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Smelting method of alloy steel containing phosphorus and copper

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 molten steel peroxidation and increasing output

Active Publication Date: 2020-05-29
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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  • Smelting method of alloy steel containing phosphorus and copper
  • Smelting method of alloy steel containing phosphorus and copper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 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.

[0063] 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

[0067] 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.

[0068] 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).

[0069] After the blowing is finished, 100kg of silicomang...

Embodiment 3

[0072] 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.

[0073] 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).

[0074] After the blowing is finished, 103kg of silic...

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Abstract

The invention discloses a smelting method of alloy steel containing phosphorus and copper, belongs to the technical field of alloy steel, and solves the problem in the prior art that the cost is higher due to adding of metal alloy during the smelting process. The smelting method comprises the following steps: 1, during converter smelting, taking molten iron containing more than 0.2% of phosphorusas the raw material; 2, adding scrap steel and scrap copper; 3, carrying out dephosphorization through controlling the oxygen supply amount, the final slag alkalinity, and T.Fe content of furnace slagand improving the bottom blowing stirring strength at the end point of the converter; and 4, during the steel tapping process, adding alloy to adjust the contents of other elements. With adoption ofthe smelting method, the smelting cost of alloy steel containing phosphorus and copper is greatly reduced.

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 Applications(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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