Short process production technique for preparing casting of wind power generation equipment

A technology of wind power generation equipment and production technology, which is applied in the direction of electric furnace, blast furnace, furnace type, etc., can solve the problems of unable to effectively increase the number of graphite balls, complex spheroidization incubation process, and unstable metallurgical quality, so as to save cooling and heavy weight The effect of melting time, improving melting efficiency, and convenient composition adjustment

Inactive Publication Date: 2010-07-28
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a short-flow production process for preparing castings for wind power generation equipment. Due to the short-flow process, the molten iron from the blast furnace is poured into pig iron ingots without cooling, and is processed in dephosphorization and desulfurization. After that, it is directly injected into the medium-frequency induction furnace, and the composition is adjusted in the medium-frequency induction furnace, and then it is spher

Method used

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  • Short process production technique for preparing casting of wind power generation equipment

Examples

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Effect test

Embodiment 1

[0034] The first step, iron ore sintering and blast furnace smelting reduction

[0035] The iron ore is crushed and magnetically separated to make iron concentrate powder, and then the iron concentrate powder is sintered into sintered ore, and then the sintered ore is sent to a blast furnace at 1500 ° C, and the sintered ore is smelted and reduced into molten iron by hot air and coke;

[0036] The second step, dephosphorization and desulfurization treatment

[0037] The molten iron obtained in the first step is transferred to the insulation bag, and the insulation bag is transported to the wire feeding machine by rails, and the wire feeding machine feeds the cored wire wrapped with the dephosphorizing agent into the insulation bag. The addition amount of the dephosphorization agent is 2% of the mass percentage of the molten iron, and the dephosphorization agent is composed of CaO 42%, Fe 2 o 3 44% and CaF 2 14% of the powder material, and at the same time pass nitrogen in...

Embodiment 2

[0045] The first step, iron ore sintering and blast furnace smelting reduction

[0046] The iron ore is crushed and magnetically separated to make iron concentrate powder, then the iron concentrate powder is sintered into sintered ore, and then the sintered ore is sent to a blast furnace at 1525°C, and the sintered ore is smelted and reduced into molten iron by hot air and coke;

[0047] The second step, dephosphorization and desulfurization treatment

[0048] The molten iron obtained in the first step is transferred to the insulation bag, and the insulation bag is transported to the wire feeding machine by rails, and the wire feeding machine feeds the cored wire wrapped with the dephosphorizing agent into the insulation bag. The addition amount of the dephosphorization agent is 3.5% of the mass percentage of the molten iron, and the dephosphorization agent is composed of CaO 44%, Fe 2 o 3 45% and CaF 2 11% of the powder material, and at the same time pass nitrogen into t...

Embodiment 3

[0056] The first step, iron ore sintering and blast furnace smelting reduction

[0057] The iron ore is crushed and magnetically separated to make iron concentrate powder, then the iron concentrate powder is sintered into sintered ore, and then the sintered ore is sent to a blast furnace at 1550 °C, and the sintered ore is reduced into molten iron by hot air and coke;

[0058] The second step, dephosphorization and desulfurization treatment

[0059] The molten iron obtained in the first step is transferred to the insulation bag, and the insulation bag is transported to the wire feeding machine by rails, and the wire feeding machine feeds the cored wire wrapped with the dephosphorizing agent into the insulation bag. The addition amount of the dephosphorization agent is 5% of the mass percentage of the molten iron, and the dephosphorization agent is composed of CaO 45%, Fe 2 o 3 46% and CaF 2 9% of the powder material, and at the same time pass nitrogen gas into the bottom ...

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Abstract

The invention discloses a short process production technique for preparing a casting of wind power generation equipment, relates to the manufacturing of cast iron alloy and is a short process production technique for preparing a thick and large section casting of the wind power generation equipment; the short process production technique includes that: molten iron obtained through the sintering of iron ore and the reduction of blast furnace smelting receives dephosphorization and desulfurization treatment and is injected into a medium-frequency induction furnace for smelting continuously with steel scrap and scrap returns, meanwhile the composition of the molten iron is regulated, and then spheroidization and inoculation are carried out to obtain the thick and large section casting for the wind power generation equipment after the final step of cast molding. The invention adopts the short process technique and accordingly improves the production efficiency; a cupola furnace is replaced by the medium-frequency induction furnace to accurately control the impurities and temperature of the molten iron and also have the effects of environmental protection and energy-saving and consumption reduction; core-spun yarns are adopted for the processes of dephosphorization, desulfurization, spheroidization and inoculation so that the treatments are quick and efficient, the number of graphite balls is effectively increased, and the thick and large section casting of high quality for the wind power generation equipment is obtained.

Description

technical field [0001] The technical scheme of the invention relates to the manufacture of cast iron alloys, in particular to a short-flow production process for preparing castings for wind power generation equipment. Background technique [0002] Most of the important components of wind power generation equipment are castings. For example, the hub of the blades in the wind power generation device, the gear box and the mechanical stand are all castings. Because wind power generation equipment is often installed on high-altitude inland or ocean, the temperature is low, the working environment is relatively harsh, and the wind power generation equipment is huge, especially the components such as the gear box and the hub are installed at a high position, so hoisting and Maintenance is not easy to carry out, which requires these castings to be able to run stably and reliably for more than 20 years. In addition, most of the castings of wind turbines are the main bearing parts, s...

Claims

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Application Information

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IPC IPC(8): C21B5/00C21C7/064C21C5/52B22D1/00C22C37/10
Inventor 赵维民廖波任广进杨兰明丁俭李海鹏赵阳扈大勇
Owner HEBEI UNIV OF TECH
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