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A low -boiling spare precious metal intermediate package alloy alloy equipment and methods

A technology of rare and precious metals and tundishes, which is applied in metal processing equipment, casting equipment, casting molten material containers, etc., can solve the problems of low alloying yield, high consumption, and inability to alloy, and achieve stable yield, The effect of small investment, convenient installation and maintenance

Active Publication Date: 2017-01-04
CENT IRON & STEEL RES INST
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The object of the present invention is to provide a tundish alloying equipment and method for rare precious metals with low boiling point, which solves the problem of low alloying yield and high consumption during refining due to the fact that the boiling point is lower than the temperature of the refining molten steel mentioned in the technical background or unalloyable problems

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  • A low -boiling spare precious metal intermediate package alloy alloy equipment and methods
  • A low -boiling spare precious metal intermediate package alloy alloy equipment and methods

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Embodiment Construction

[0019] The present invention will be further described below through embodiment.

[0020] A tundish microalloying technology for low-boiling rare and precious metals in this embodiment, the test steel type is low-carbon high-sulfur free-cutting steel containing a small amount of bismuth, and its bismuth alloy composition content is 0.0002% to 0.0025%, and the microalloying metal The powder is pure bismuth (boiling point 1560°C), and the particle size of the powder does not exceed 200 mesh. Produced by the BOF-LF-CC process, the LF refining exit temperature is controlled at 1580-1620°C during production, the upper continuous casting platform temperature is about 1570-1580°C, and the first ladle pouring temperature is 1540-1560°C. The continuous casting adopts arc continuous casting machine, the casting speed of the three-strand billet is about 1.4-1.6m / min, and the cross-section of the billet is 150mm×150mm.

[0021] The pipe diameter of the branch a of the tundish microalloyi...

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Abstract

The invention relates to a low-boiling rare-precious metal tundish alloying device and a method, belongs to the technical field of steel. The alloying device comprises an alloyed powder transferring gas pipeline and a control device branch a, a tundish impact zone liquid level gas protecting device branch b and an integrated control software. The alloyed powder transferring gas pipeline and the control device branch a are connected to an argon main pipe of a steel works, an electronic pressure maintaining valve is mounted at the control device branch a to regulate argon pressure, an electronic flowmeter is mounted at the rear of the electronic pressure maintaining valve to monitor argon flow, and a powder storing and transferring device is mounted at the rear of the electronic flowmeter. The powder storing and transferring device is composed of a ball valve, a powder storing device and a high-precision regulating valve. The ball valve is used for cutting off argon when the control device branch a is out of service. The tail end of the control device branch a is connected with a side blow gun, embedded in the impact zone, through a metal hose, and spraying powder alloying is realized via the side blow gun under steel liquid level. The device is small in occupied area, convenient to install and maintain, and small in investment.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a tundish alloying equipment and method for rare and precious metals with low boiling point, which can be used for the rare and precious metals with low boiling point (the boiling point is below the refining temperature of molten steel in the standard state) in the tundish (micro) Alloying. Background technique [0002] Steel types containing alloy components are generally alloyed and fine-tuned in the refining process during the smelting process, which is mostly suitable for the case where the boiling point of the alloy is higher than the refining temperature. When the boiling point of alloying elements (such as rare earth elements europium and ytterbium in rare earth steel, bismuth and antimony in free-cutting steel) is lower than the refining temperature (about 1600-1700°C), if the refining process is still carried out (micro) Alloying, not only is it difficul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D41/00C21C7/00
Inventor 林腾昌杨利彬
Owner CENT IRON & STEEL RES INST
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