High phosphorus and low sulfur non-oriented electrical steel and its smelting method

A technology of oriented electrical steel and high phosphorus, which is applied in the field of metallurgy, can solve the problems of composition control without clearly specifying the control scheme, and achieve iron loss and magnetic satisfaction, good quality, and obvious economic benefits

Active Publication Date: 2011-11-30
PANZHIHUA IRON AND STEEL +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent does not involve the smelting process, and does not clearly point out the control scheme for composition control

Method used

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  • High phosphorus and low sulfur non-oriented electrical steel and its smelting method
  • High phosphorus and low sulfur non-oriented electrical steel and its smelting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1 Preparation of high-phosphorus and low-sulfur electrical steel of the present invention

[0052] Using molten iron containing vanadium and titanium as raw materials, its main components are: 4.02% C, 0.27% V, 0.17% Mn, 0.003% S, 0.072% P, 0.22% Si, 0.17% Ti and a small amount of unavoidable impurities; the molten iron Add 120t of compound blowing vanadium extraction converter for blowing, the amount of mixing is 135t, then add coolant into the vanadium extraction converter, and use 339 oxygen lances to supply oxygen and blow vanadium, within 2 to 3 minutes of blowing vanadium, blow vanadium into the furnace After adding 2t of iron oxide scale and supplying oxygen for 4.5 minutes, add 300kg of magnesia to the furnace for slag adjustment, and then supply oxygen for 40 seconds to block slag and remove semi-steel and vanadium slag. The final temperature of blowing is 1435°C. The composition of the obtained semi-steel is: 3.40%C, 0.07%Mn, 0.062%P, 0.004%S, 0.028...

Embodiment 2

[0056] Example 2 Preparation of high-phosphorus and low-sulfur electrical steel of the present invention

[0057]Using molten iron containing vanadium and titanium as raw materials, its main components are: 4.05% C, 0.28% V, 0.16% Mn, 0.002% S, 0.068% P, 0.21% Si, 0.16% Ti and a small amount of unavoidable impurities; the molten iron Add 120t of compound blowing vanadium extraction converter for blowing, the amount of mixing is 135t, then add coolant into the vanadium extraction converter, and use 339 oxygen lances to supply oxygen and blow vanadium, within 2 to 3 minutes of blowing vanadium, blow vanadium into the furnace After adding 2t of iron oxide scale and supplying oxygen for 4.7 minutes, add 300kg of magnesia to the furnace for slag adjustment, and then supply oxygen for 30 seconds to block slag and remove semi-steel and vanadium slag. The end temperature of blowing is 1433°C. The composition of the obtained semi-steel is: 3.38%C, 0.06%Mn, 0.058%P, 0.003%S, 0.027%V and...

Embodiment 3

[0062] Example 3 Preparation of high-phosphorus and low-sulfur electrical steel of the present invention

[0063] Using molten iron containing vanadium and titanium as raw materials, its main components are: 4.10% C, 0.27% V, 0.13% Mn, 0.003% S, 0.075% P, 0.20% Si, 0.14% Ti and a small amount of unavoidable impurities; the molten iron Add 120t of compound blowing vanadium extraction converter for blowing, the amount of mixing is 135t, then add coolant into the vanadium extraction converter, and use 339 oxygen lances to supply oxygen and blow vanadium, within 2 to 3 minutes of blowing vanadium, blow vanadium into the furnace After adding 2t of iron oxide scale and supplying oxygen for 4.8 minutes, add 300kg of magnesia to the furnace for slag adjustment, and then supply oxygen for 35 seconds to block slag and remove semi-steel and vanadium slag. The final temperature of blowing is 1428°C. The composition of the semi-steel obtained is: 3.41%C, 0.07%Mn, 0.082%P, 0.003%S, 0.026%V ...

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Abstract

The invention belongs to the technical field of metallurgy and particularly relates to high-phosphorus low-sulfur non-oriented electrical steel and a smelting method thereof. The technical problem to be solved is to improve resistivity of the electrical steel without influencing the magnetism of the electrical steel. For solving the problem, the invention adopts a technical scheme which is to provide high-phosphorus low-sulfur non-oriented electrical steel. The high-phosphorus low-sulfur non-oriented electrical steel comprises the following ingredients in percentage by weight: 0 to 0.0050 percent of carbon, 0.30 to 1.0 percent of silicon, 0.15 to 0.35 percent of manganese, 0.030 to 0.08 percent of phosphorus, 0 to 0.005 percent of sulfur, less than or equal to 0.0050 percent of aluminum and the balance of ferrum. A production process for the electrical steel is suitable for producing the high-phosphorus low-sulfur non-oriented electrical steel by taking vanadium titanium-containing molten iron as a raw material, and has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to high-phosphorus, low-sulfur non-oriented electrical steel and a smelting method thereof. Background technique [0002] Electrical steel is widely used in the transformer and home appliance industries. Due to the performance requirements of electrical steel, the composition must meet low carbon and low sulfur, and there is a certain degree of difficulty in smelting. Because phosphorus can increase the electrical resistivity of electrical steel, it is widely used in the household appliance industry to ensure a certain phosphorus content in electrical steel, but too much phosphorus content will reduce the magnetic properties of electrical steel. High-quality electrical steel should not only ensure the increase of resistivity, but also ensure that its magnetism is not affected. Therefore, in the smelting process of this steel type, there are technical difficulties in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/04C21C7/10C21C7/068C21C7/064C21C7/06
Inventor 陈亮陈天明陈永曾建华李军冯远超杨森祥李平凡张敏
Owner PANZHIHUA IRON AND STEEL
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