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Modification technology of aluminum deoxidization product of non-oriented silicon steel

A silicon steel aluminum product technology, applied in the technical field of non-oriented silicon steel aluminum deoxidation product denaturation, can solve the problems of continuous casting nozzle flocculation, etc., achieve the effect of reducing product surface inclusions, reducing product surface inclusion defects, and avoiding clogging

Inactive Publication Date: 2019-09-27
MAANSHAN IRON AND STEEL COMPANY
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Problems solved by technology

For this reason, the present invention provides a process for the denaturation of aluminum deoxidation products of non-oriented silicon steel, the purpose of which is to solve the problem of flocculation at the continuous casting nozzle

Method used

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  • Modification technology of aluminum deoxidization product of non-oriented silicon steel
  • Modification technology of aluminum deoxidization product of non-oriented silicon steel

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Experimental program
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Embodiment

[0030] The 120-ton converter-120-ton RH-CSP thin slab continuous casting process is implemented on W800 for the production of non-oriented silicon steel. The 13 continuous casting furnaces are planned to stop pouring. The total pouring time is about 690 minutes. The stopper curve is stable (the starting rod position is about 67mm, The position of the stop casting rod is about 63mm), the pouring is normal, and there is basically no floc in the inner cavity of the nozzle after casting. The main parameters of RH refining of molten steel for each heat are shown in Table 1.

[0031] Table 1 Main parameters of RH refining of molten steel in each heat

[0032]

[0033]

[0034] After specific implementation certification, the process of the present invention can solve the problem of flocculation at the nozzle of continuous casting, realize multi-furnace continuous casting and reduce product surface inclusion defects. The number of continuous casting furnaces reaches more than 1...

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Abstract

The invention discloses a modification technology of an aluminum deoxidization product of non-oriented silicon steel. After vacuum decarburization and deoxidization through the RH procedure, powder spray is conducted in a vacuum chamber, so that the aluminum deoxidization product is changed into liquid-state calcium aluminate from aluminum oxide, the powder agent for powder spray comprise not smaller than 90% of CaO, 2-5% of CaF2 and 2-5% of Al2O3. The modification technology of the aluminum deoxidization product of the non-oriented silicon steel can solve the flocculating flow problem of a continuous casting nozzle, achieves sequence casting and can lower the product surface inclusion defect, the number of sequence casting heats reaches 12 or over, and the product surface inclusion is greatly lowered.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy out-of-furnace refining, and in particular relates to a process for denaturing non-oriented silicon steel and aluminum deoxidation products. Background technique [0002] Feeding calcium-containing cored wire to aluminum-killed steel by calcium treatment method affects Al in steel 2 o 3 Modification of inclusions has good metallurgical effect. The principle is that by increasing the effective calcium content in steel, on the one hand, the brittle Al with large particles and high melting point produced by deoxidation of aluminum 2 o 3 The inclusions are denatured and become low-melting calcium-aluminate inclusions with higher calcium content (such as 12CaO·7Al 2 o 3 ), to promote the floating of inclusions and purify molten steel. [0003] There is a nozzle flocculation problem when adopting the converter-RH-CSP continuous casting process to produce non-oriented silicon stee...

Claims

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Application Information

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IPC IPC(8): C21C7/00C21C7/10
CPCC21C7/0037C21C7/10
Inventor 舒宏富解养国刘天泉霍俊潘晓亮尹国才
Owner MAANSHAN IRON AND STEEL COMPANY
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