Method of producing wind power casting from blast furnace molten iron

A blast furnace molten iron and wind power technology, which is applied in the field of casting and ferrous metallurgy, can solve the problems of high-performance wind power castings and poor ability to adjust and control the composition of molten iron in induction furnaces, etc., so as to save costs, improve production efficiency, and shorten the process flow Effect

Inactive Publication Date: 2012-01-11
XUZHOU SHENGHAI MACHINERY MFG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that the induction furnace has poor ability to adjust and control the molten iron composition. After the blast

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The molten iron obtained by blast furnace smelting has a temperature of 1200 degrees Celsius and a chemical composition (mass percentage) of 4.1% C, 0.8% Si, 0.6% Mn, 0.3% P, 0.2% S, and the balance is Fe and unavoidable trace impurities. Pour it into an electric arc furnace, heat up, and after decarburization, silicon increase, manganese reduction, desulfurization, dephosphorization and other smelting processes, the composition (mass percentage) of the original molten iron is 3.6%C, 0.9%Si, 0.2% Mn, <0.04%P, <0.06%S, the balance is Fe and unavoidable trace impurities, and the temperature is 1450 degrees Celsius.

[0020] The original molten iron is spheroidized with a rare earth silicon-magnesium alloy, and then inoculated with a ferrosilicon alloy. After the treatment is completed, a trace amount of metal Sb is added, and the chemical composition (mass percentage) of the final molten iron obtained after the treatment is 3.5% C, 1.9% Si, 0.2% Mn, 0.04% P, 0.03% S, 0.05...

Embodiment 2

[0022] The molten iron obtained by blast furnace smelting has a temperature of 1260 degrees Celsius and a chemical composition (mass percentage) of 4.3% C, 1.2% Si, 0.5% Mn, 0.2% P, 0.2% S, and the balance is Fe and unavoidable trace impurities. Pour it into an electric arc furnace, heat up, and after decarburization, silicon increase, manganese reduction, desulfurization, dephosphorization and other smelting processes, the composition (mass percentage) of the original molten iron is 3.8%C, 1.2%Si, 0.2% Mn, <0.05% P, <0.06% S, the balance is Fe and unavoidable trace impurities, and the temperature is 1460 degrees Celsius.

[0023] Rare earth silicon-magnesium alloy is used to spheroidize the original molten iron, and then ferrosilicon alloy is used for inoculation treatment. After the treatment is completed, a trace amount of metal Sb is added, and the chemical composition (mass percentage) of the final molten iron obtained after the treatment is 3.8%C, 2.1%Si, 0.2%Mn, 0.05%P,...

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Abstract

The invention discloses a method of producing a wind power casting from blast furnace molten iron, which belongs to the technical field of casting. The method comprises the following steps: 1) adding melted iron obtained in the process of melting in a blast furnace into an arc furnace, heating the melted iron and adjusting components in the melted iron; 2) pouring the melted iron in a ladle when the temperature of and the components in the melted iron meet requirements, and carrying out desulphurization and spheroidization on the melted iron with a nodulizer; 3) adding an inoculant into the melted iron that has undergone desulphurization and spheroidization for inoculation; 4) carrying out micro-alloying on the melted iron; 5) after treatment in the previous steps, pouring the melted iron into a casting mold with casting temperature being controlled at 1300 to 1340 DEG C, and carrying out slow cooling so as to obtain the wind power casting with performance meeting requirements. The advantages of the invention are as follows: process flow is substantially shortened, production efficiency is improved, and cost is saved; the invention is of important significance to energy conservation and consumption reduction.

Description

Technical field [0001] The invention relates to a production technology of wind power castings, in particular to a method for producing wind power castings with molten iron in a blast furnace, and belongs to the field of casting and ferrous metallurgy. Background technique [0002] Wind power generation is the most effective way to cleanly utilize wind energy. High-quality wind power castings are the key to the reliable operation of wind turbines and the effective use of wind energy. Wind power generators are mostly installed in the field, and the working conditions are harsh, which puts forward extremely high requirements on the quality of wind power castings. [0003] Ferritic ductile iron has excellent strength and toughness, and is the preferred material for large-scale wind turbine castings. However, large-scale wind power castings usually have a wall thickness of more than 100mm and a weight of several tons or even tens of tons. Such extra-large ductile iron casting...

Claims

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Application Information

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IPC IPC(8): C21C1/08C22C33/10
Inventor 岑启宏王治国刘晓林刘静孙吉明
Owner XUZHOU SHENGHAI MACHINERY MFG TECH
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