A method for making semi-processed cold rolled silicon steel in thin slab continuous casting and continuous rolling process

A thin slab continuous casting and cold-rolling silicon steel technology, which is applied to the improvement of process efficiency, metal rolling, and tool manufacturing, can solve the problems of low casting slab yield, many process links, and large equipment investment, so as to reduce the process Links, save equipment investment, reduce the effect of equipment investment

Active Publication Date: 2006-11-22
湖南华菱涟钢特种新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method of producing semi-process silicon steel is to use molten iron pretreatment - top and bottom combined blowing converter - vacuum treatment - thick slab continuous casting - heating furnace reheating - rough rolling unit - continuous rolling unit - pickling - continuous rolling or single st

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] Example 1

[0033] Pour the molten iron from the blast furnace into the oxygen top-bottom composite converting converter, and at the same time add 10% of the total weight of scrap steel into the converter. During the blowing process, lime, dolomite and fluorite are added to the converter to make the final slag binary basicity R=2.8; the converter adopts the whole process of bottom blowing argon, and the bottom blowing argon intensity is ≥0.03Nm 3 / min.t 钢 . When the final composition of molten steel [C]≤0.02%, [P]≤0.035%, [S]≤0.015% and the final temperature of molten steel is 1650℃, tapping with constant oxygen is required; when the converter is tapped, 1.2kg is added to the ladle first / t 钢液 Compound deoxidizer such as barium-silicon alloy and 1.8kg / t 钢液 The metal aluminum block initially deoxidizes the molten steel. After the first deoxidation of the molten steel, the dissolved oxygen content in the molten steel is 100ppm; then 2.5kg / t is added to the molten steel 钢液 Met...

Example Embodiment

[0035] Example 2

[0036] The molten iron from the blast furnace is poured into the oxygen top-bottom composite converting converter, and at the same time, 20% of the total weight of scrap steel is poured into the converter. During the blowing process, add lime, dolomite, and fluorite to the converter to make the final slag binary basicity R=1.5; the converter adopts the whole process of bottom blowing argon, and the strength of bottom blowing argon is ≥0.03Nm 3 / min.t 钢 . When the final composition of molten steel [C]≤0.02%, [P]≤0.035%, [S]≤0.015% and the final temperature of molten steel is 1680℃, constant oxygen tapping; 2.5kg is added to the ladle when the converter is tapped / t 钢液 Compound deoxidizer such as silicon-calcium alloy and 0.2kg / t 钢液 The metal aluminum block initially deoxidizes the molten steel. After the first deoxidation of the molten steel, the dissolved oxygen content in the molten steel is 225ppm; then 0.6kg / t is added to the molten steel 钢液 Metal manganese, ...

Example Embodiment

[0038] Example 3

[0039] Pour the molten iron from the blast furnace into the oxygen top-bottom composite converting converter, using all molten iron smelting, without adding scrap steel, and adding lime, dolomite, and fluorite to the converter during the converting process to make the final slag binary alkalinity R=4.0 ; The converter adopts the whole process of bottom argon blowing, and the intensity of bottom argon blowing ≥0.03Nm 3 / min.t 钢 . When the final composition of molten steel [C]≤0.02%, [P]≤0.035%, [S]≤0.015% and the final temperature of molten steel is 1700℃, the steel is tapped with constant oxygen; 0.20kg is added to the ladle when the converter is tapped / t 钢液 Compound deoxidizer such as silicon-aluminum-calcium alloy and 3.5kg / t 钢液 The metal aluminum block performs the initial deoxidation of the molten steel. After the initial deoxidation of the molten steel, the dissolved oxygen content in the molten steel is 30ppm; then, 4.5kg / t is added to the molten steel 钢液...

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PUM

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Abstract

The invention relates to a method for using sheet blank continuous casting continuous rolling to produce silicon steel. In the BOF smelt process, it uses bottom argon blow technique in the whole processes; adds composite deoxidant and aluminum into steel pack when outputting steel to remove oxygen; adds manganese, silicon steel and ferro-phosphorus to alloy; blows argon to the melt steel in all process; uses LF furnace to refine the melt steel; using CSP continuous casting machine to cast the melt steel into casting blank; heats the casting blank via TF furnace to be rolled by continuous rolling machine to be hot rolling sheet coil; acid washes hot rolling plate to be cold rolled via rough roller cold rolling machine to be cold rolled sheet coil; anneals via the anneal furnace; flattens the annealed sheet coil via flatten machine group while the extending rate is 2-18%; corrects the sheet shape via correct machine; packs and stores the coil into the storehouse. The inventive method can reduce the cost of producing device and improve the additive value of sheet blank continuous casting continuous rolling product.

Description

technical field [0001] The invention relates to a production method, in particular to a method for producing semi-process cold-rolled silicon steel for electromagnetic elements in a thin slab continuous casting and rolling process. Background technique [0002] Semi-process silicon steel belongs to low-carbon and low-silicon cold-rolled non-oriented electrical steel. It has low iron loss, high magnetic induction intensity and good punching performance. Developed countries such as the United States began to produce and use low-temperature steel as early as the 1960s. Carbon low-silicon non-oriented semi-process silicon steel, this type of steel may not be annealed or incompletely annealed, and does not require coating treatment. Users can directly punch sheets and perform decarburization annealing treatment according to the design requirements of various electromagnetic components. It can enter the market after bluing (insulation layer) treatment. This product has the advanta...

Claims

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Application Information

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IPC IPC(8): B21B1/46B21B37/00B21B45/02B22D11/16B22D41/00C21C5/30C21C7/04C21C7/06C21C7/076
CPCY02P10/20
Inventor 吴光亮郑柏平焦国华
Owner 湖南华菱涟钢特种新材料有限公司
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