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Blowing purifying method for casting ladle

A gas purification and ladle technology, applied in foundry equipment, casting melt containers, manufacturing tools, etc., can solve the problem of short service life of steel (iron) water ladle, inability to purify steel (iron) water, poor homogenization of alloy composition, etc. problem, to achieve the effect of being conducive to removal, not easy to segregate, and promoting the growth of polymerization

Inactive Publication Date: 2005-09-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the traditional process of the foundry industry, after the molten steel (iron) is poured into the steel (iron) ladle for pouring, pouring in a certain amount of deoxidizer and inoculant, etc., there are often sticking, The bottom and steel (iron) water cannot be purified, and the homogeneity of the alloy composition is poor, so it is prone to quality defects such as segregation of casting components and high impurity content, and the service life of the steel (iron) water ladle for casting is short

Method used

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  • Blowing purifying method for casting ladle
  • Blowing purifying method for casting ladle
  • Blowing purifying method for casting ladle

Examples

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Effect test

Embodiment 1

[0015] Embodiment 1: In the Foundry Research Institute of Foundry Co., Ltd. of China First Automobile Group Corporation, a 300kg pouring ladle is used to blow argon into the hot forging mold steel molten steel in the ladle through the vent plug installed in the air blowing device at the bottom of the ladle , to carry out molten steel purification treatment.

[0016] Argon blowing pressure (relative pressure): 0.11PMa

[0017] Argon blowing flow rate: 15L / min.

[0018] Molten steel temperature when blowing air: 1680°C

[0019] Argon blowing time: 3.5min.

[0020] Stand still after blowing argon: 1min.

[0021] Compared with unpurified air blowing purification, the S content is reduced by 50% on average, the P content is reduced by 30% on average, and the H and O content are reduced by 30%.

Embodiment 2

[0022] Embodiment 2: In the steel casting workshop of a foundry of China First Automobile Group Corporation Casting Co., Ltd., a 3t pouring ladle is used to blow the hot forging mold steel molten steel into the ladle through the vent plug installed in the air blowing device at the bottom of the ladle. Argon gas is used to purify molten steel.

[0023] Argon blowing pressure (relative pressure): 0.2PMa

[0024] Argon blowing flow rate: 22L / min.

[0025] Molten steel temperature when blowing air: 1690°C

[0026] Argon blowing time: 4.5min.

[0027] Stand still after blowing argon: 2.5min.

[0028] Compared with unpurified by argon blowing, the S content is reduced by 55% on average, the P content is reduced by 30% on average, and the gas content is reduced by 35%.

Embodiment 3

[0029] Embodiment 3: In the steel foundry workshop of a foundry of China First Automobile Group Corporation Casting Co., Ltd., pouring ladle with 5t, blowing nitrogen gas to molten steel of 35CrMnSi steel in the ladle by the breathable plug installed in the air blowing device at the bottom of the ladle, carry out Purification of molten steel.

[0030] Argon blowing pressure (relative pressure): 0.4PMa

[0031] Argon blowing flow rate: 30L / min.

[0032] Molten steel temperature when blowing air: 1670°C

[0033] Argon blowing time: 6min.

[0034] Stand still after blowing argon: 4min.

[0035] Compared with unpurified air blowing, the S content is reduced by 50% on average, the P content is reduced by 30% on average, and the H and O gas content is reduced by 40%.

[0036] The blowing device that is used for the bottom of the steel (iron) ladle of the inventive method is to press figure 1 , figure 2 The shown mode is formed: a ventilation plug 7 is installed at the bottom ...

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Abstract

The present invention relates to a gas-blowing cleaning method of pouring ladle and its equipment. Said method can effectively reducing harmful gas and impurity in the molten metal and can more fully implement inoculation, modification and microalloying process of the molten steel in the pouring ladle, at the same time can more effectively make the cleaning agent produce action, so that it can raise the mechanical property of casting, its cold and heat fatigue property and service life. Said equipment is formed from gas permeation plug set on the bottom portion of ladle and pressure gas cylinder. The pressure gas cylinder is connected with ais permeation plug yas circuit successively by means of pressure gauge, gas flow meter, fitering dewatering agent and quick-switch connector.

Description

technical field [0001] The invention relates to a casting process, in particular to a method for blowing air from a small ladle for casting and pouring. Background technique [0002] At present, in the traditional process of the foundry industry, after the molten steel (iron) is poured into the steel (iron) ladle for pouring, pouring in a certain amount of deoxidizer and inoculant, etc., there are often sticking, The bottom and steel (iron) water cannot be purified, and the homogeneity of the alloy composition is poor. Therefore, quality defects such as segregation of casting components and high impurity content are prone to occur, and the service life of the steel (iron) water ladle for casting is short. Contents of the invention [0003] The object of the present invention is to propose a method and device for blowing and purifying a small ladle for casting and pouring. It can effectively reduce harmful gases and impurities in liquid metal. The inoculation, modificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/58C21C7/072
Inventor 赵玉谦姜启川赵宇光关庆丰夏振佳李国清张瑞卿王树奇王春生方建儒侯骏王慧远王金国
Owner JILIN UNIV
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