Spheroidizing method

A technology of spheroidizing treatment and spheroidizing agent, which is applied in the field of spheroidizing treatment of the flushing-in-bag method, can solve the problems of low absorption rate of effective elements and violent reaction, and achieves the solution of molten iron splashing, production cost reduction, loss prevention and other problems. escape effect

Active Publication Date: 2013-01-16
深圳市嘉能新型环保建材有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of spheroidizing treatment method, utilize the integral rare earth magnesium ferrosilicon nodulizing agent of outer liner square steel pipe to cooperate with the spheroidizing treatment bag that covers cover, solve violent reaction, The problem of low absorption rate of effective elements, precise control of spheroidizing reaction time, improving product quality, reducing production costs, fully exerting and utilizing resources, and significantly improving the production environment of the spheroidizing agent production process and use process

Method used

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Embodiment 1

[0031] Embodiment 1: Carry out under cold air cupola smelting conditions, melting rate is 2 tons / hour, adopts attached figure 1 The overall rare earth magnesium silicon ferrosilicon nodulizer 2 with the outer lined square steel pipe is stably fixed on the bottom of the molten iron ladle by wedge-shaped plugs for nodulization treatment. The weight of molten iron per ladle is 1000kg, and the red hot ladle is used for continuous operation. , the temperature of the molten iron in the tap trough is 1485°C, and the sulfur content of the original molten iron is 0.063%, excluding the overall rare earth magnesium ferrosilicon nodularizer containing Mg15%, RE2% and Si58% for the outer lining square steel pipe, and its input includes the outer lining The overall weight of rare earth magnesium silicon iron nodulizer 2 of the square steel pipe accounts for 1.15% of the weight of the molten iron to be processed, and 0.4% is added to the 72SiFe inoculant bag, so that ferrite and perlite are n...

Embodiment 2

[0032] Embodiment 2: Carry out under the smelting condition of intermediate frequency electric furnace, adopt the attached figure 1 The overall rare earth magnesium silicon ferrosilicon nodulizer 2 with the outer lined square steel pipe is stably fixed on the bottom of the molten iron ladle by a wedge-shaped plug to carry out the nodularization treatment. The weight of molten iron per ladle is 1000kg, and the temperature of the molten iron from the electric furnace is 1568 ℃, the sulfur content of the original molten iron is 0.025%, excluding the overall rare earth magnesium ferrosilicon nodulizers containing Mg12.5%, RE1% and Si58% for the outer lining of the square steel pipe, and its input includes the overall rare earth magnesium of the outer lining of the square steel pipe The weight of ferrosilicon nodulizer 2 accounts for 0.75% of the weight of the molten iron to be processed, and 0.35% is added to the 72SiFe inoculant bag. After the spheroidization reaction is completed...

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Abstract

The invention relates to a spheroidizing method for producing spheroidal graphite cast iron, and the method comprises the following steps: injecting melted rare earth magnesium silicon iron nodulizer alloy fluid containing less than or equal to 20% of Mg, less than or equal to 65% of Si and less than or equal to 3% of RE into a square steel pipe for cooling and solidification; fixing the whole rare earth magnesium silicon iron nodulizer of the outer lining square steel pipe in a spheroidizing bag by using refractory bricks and wedge-type chocks at the bottom of the spheroidizing bag covered, and then carrying out spheroidizing by utilizing a bag injecting method. The time for controlling spheroidizing is accurate, the molten iron cooling is less in the spheroidizing and casting process, the absorption rate of Mg, RE and Si after the spheroidizing is high, degradated spheroidization is prevented 15min after spheroidizing, the environment for producing and using a nodulizer is improved, the production cost is remarkably reduced and the quality of the product is improved. Compared with the conventional rare earth magnesium silicon iron nodulizer containing the rare-earth element RE of 2-8%, the spheroidizing method can be used for reducing the use amount of the rare-earth element RE by 50-75%.

Description

technical field [0001] The present invention relates to the spheroidizing treatment method for the production of nodular cast iron, more specifically to the spheroidizing treatment by using the massive rare earth magnesium ferrosilicon spheroidizing agent lined with square steel pipes in the spheroidizing bag and carrying out the method of rushing into the bag. Methods. Background technique [0002] Rare earth magnesium ferrosilicon alloys are widely used as nodularizers in enterprises producing ductile iron castings. Rare earth magnesium ferrosilicon alloy nodulizer is currently the largest nodulizer at home and abroad, but in its traditional production process, it consumes a lot of energy, has large melting loss, and causes serious environmental pollution. Due to the low absorption rate of magnesium, the traditional nodulizer The amount added is larger. For a long time, technical personnel at home and abroad have made unremitting efforts to study the spheroidization trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/10C21C1/10
CPCC22C33/10C22C38/002C22C38/02C21C1/105C22C38/005C21C1/10C22C28/00C22C33/06
Inventor 刘年路刘昌晨
Owner 深圳市嘉能新型环保建材有限公司
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