Treatment method of molten iron

A technology of molten iron and processing bag, which is applied in the direction of improvement of process efficiency, casting molten material container, manufacturing tools, etc. It can solve the problems such as the decline of effective element absorption rate, achieve high absorption rate, less cooling of molten iron, and improve the environment

Active Publication Date: 2017-03-22
TIANJIN WANLU LTD CO OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, when the temperature of the molten iron to be processed is higher than 1550°C and the weight of the molten iron to be processed is only about 500kg, the absorption rate of effective elements decreases obviously, for example, the absorption rate of magnesium decreases from 85% to 50%. Therefore, for the above-mentioned molten iron The method of processing requires necessary technical improvements

Method used

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  • Treatment method of molten iron
  • Treatment method of molten iron
  • Treatment method of molten iron

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Embodiment 1

[0028] Embodiment 1: Carried out under the smelting conditions of an intermediate frequency electric furnace, using the reaction chamber structure of the molten iron treatment ladle 1 shown in the accompanying drawings, covering the ladle, and using an integral rare earth magnesium silicon iron nodulizer with no outer lining steel pipe to fill the molten iron for treatment In the reaction chamber of the package, the weight of each package of molten iron is 500kg, the temperature of the molten iron from the electric furnace is 1575°C, the sulfur content of the original molten iron is 0.027%, and the rare earth magnesium silicon ferrosilicon nodulizer contains Mg11.5%, RE1% and Si61. 5%, the weight of the added rare earth magnesium silicon ferrosilicon nodulizer accounted for 0.59% of the weight of the molten iron to be processed, and 0.8% 72SiFe inoculant was added in the reaction chamber. The amount of covering molten iron is 0.15%. In the case of not covering iron filings and ...

Embodiment 2

[0029] Example 2: Under the conditions of intermediate frequency electric furnace smelting, adopt the reaction chamber structure of the molten iron treatment ladle 1 shown in the accompanying drawing, process 1000Kg of molten iron, spheroidize iron at 1525°C, and add rare earth magnesium into the reaction chamber of the molten iron treatment ladle The ferrosilicon nodulizer contains 13.5% Mg, 1% RE and 63.5% Si, and the added rare earth magnesium ferrosilicon nodulizer accounts for 0.49% of the weight of the treated molten iron; 0.8% 72SiFe inoculant is added to the reaction chamber , whose particle size is ≤25mm; 1000Kg of molten iron to be processed is poured into the molten iron treatment ladle at one time, 18cm away from the upper edge of the molten iron treatment ladle, there is no splash of molten iron during the molten iron reaction process, the total reaction time of the spheroidizing reaction is 118 seconds, and the molten iron reaction is completed The temperature is ...

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Abstract

The invention relates to a method for treating molten iron in a production process of spheroidal graphite cast iron, vermicular graphite cast iron or molten iron desulphurization. According to the method, a spheroidizing agent, a vermicular agent or a desulfurizing agent are put into a reaction chamber formed in a molten iron treatment ladle for treating the molten iron, wherein an inwards protruded type annular belt and the reaction chamber are arranged in the molten iron treatment ladle; magnesium steam generated during molten iron reaction is diffused outwards through the charging hole of the reaction chamber and a decompression groove. Therefore, the problems of moving and upward floating of the spheroidizing agent, the vermicular agent or the desulfurizing agent after melting loss are solved, the problems of strong reaction and low absorption rate of effective elements during treatment of the molten iron in the ladle are solved, the reaction time of the molten iron is accurately controlled, the product quality is improved, the production cost is reduced, the operation is simple and convenient, the resources are brought into full play and utilized, and the production environment is remarkably improved; in addition, the molten iron in the molten iron treatment and pouring processes is slightly cooled, the absorption rate of the effective elements is high, and the consumption of rare earth element RE can be reduced by 50-75%.

Description

technical field [0001] The present invention relates to the processing method of molten iron, more specifically relates to the processing method of molten iron in the production process of nodular graphite cast iron or vermicular graphite cast iron or molten iron desulfurization. Background technique [0002] In the production process of nodular cast iron or vermicular graphite cast iron or molten iron desulfurization, it is inevitable to cool down the molten iron after the treatment of molten iron; in the process of processing nodular graphite cast iron or vermicular graphite cast iron, in addition to the cooling of molten iron, it will also produce effective elements Oxidation and escape will affect the quality of the product. [0003] The applicant applied for the Chinese Invention Patent Publication No. CN103874771A on September 6, 2013, named "Spheroidizing Treatment Method for Ductile Iron", and applied for the Chinese Invention Patent Publication No. CN103862004A on M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C1/02C21C1/10C21C7/076C22C33/12B22D41/00
CPCY02P10/20
Inventor 刘年路刘昌晨
Owner TIANJIN WANLU LTD CO OF SCI & TECH
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