Method for pouring plate blank stainless steel

Abstract

The invention relates to a method for pouring plate blank stainless steel, which comprises the following process steps: fixing a dummy bar head on a pouring position; filling a sealing material in a gap between a copper plate and the dummy bar head; spreading iron abrasive dust onto the dummy bar head and a dovetail groove; placing an iron sheet around a crystallizer; placing a spring on the dovetail groove; placing a layer of steel plate net on the iron abrasive dust; placing a layer of spring on the steel plate net and in a direction vertical to the copper plate; placing two layers of springs in places which are 100 meters away from the two ends; uniformly coating a reacting agent on the surface of the copper plate of the crystallizer; and pouring, namely when the pouring volume in a large ladle reaches 40 to 60 percent of the normal tonnage of an intermediate ladle, pouring in the intermediate ladle till the molten steel in the crystallizer submerges the springs, stopping pouring for 5 to 10 seconds, pouring normally till the poured material approaches a submerged water opening, stopping pouring for 5 to 10 seconds, adding pouring slag when the level of the molten liquid submerges a side hole of the submerged water opening, ensuring an emergence time is 110 to 150 seconds, and thus, finishing a pouring process.

Description

technical field [0001] The invention relates to a method for casting slab stainless steel, which belongs to the technical field of metal smelting. Background technique [0002] The current pouring method for casting stainless steel in slab continuous casting machines is as follows: fix the dummy head at the pouring position (the distance between the dummy head and the top of the copper plate is about 500 to 600 mm), clean up the dirt and water on the dummy head, and seal the dummy head with a sealing tool. Material fills the gap between the copper plate and the dummy head. Spread the cooled iron filings on the dummy head, the thickness of the iron filings is about 20mm. After the dummy ingot is sealed, the copper plate is oiled and ready to be poured. The seedling emergence time of this method is generally 70 to 100 seconds. Just disclose a kind of method for improving the surface quality of continuous casting slab as the Chinese patent that publication number is CN1246392...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the pouring process of this slab continuous casting machine for pouring stainless steel has the following disadvantages: First, when the dummy head is pulled out of the crystallizer in this pouring process, some iron filings will be scattered in the sector On the foot roll of the cast slab, iron chips are pressed into the surface of the slab, which affects the quality of the slab

Second, when a large number of iron filings are scattered on the fan-shaped section, it will affect the normal operation of the equipment and increase the number of maintenance of the equipment

The third is that a large amount of iron filings on the surface of the slab is pressed in, which increases the labor intensity of slab quality inspection and slab grinding. At the same time, if there is a missed inspection, it will seriously affect the quality of the final product coil