A kind of waste heat rolling equipment and process of continuous casting slab convex roll

Abstract

The invention provides equipment and process for conducting protruding roller rolling through continuous casting slab waste heat and belongs to the technical field of continuous casting slab rolling equipment and processes, and continuous casting slabs are subjected to protruding roller rolling through continuous casting slab waste heat. According to the technical scheme, the equipment for conducting protruding roller rolling through continuous casting slab waste heat is arranged on the position after the continuous casting slabs are cut and before the continuous casting slabs are conveyed to a steel rolling line, protruding rollers are symmetrically pressed downwards in double directions for rolling, the protruding roll waste heat rolling equipment and process can replace continuous casting slab blooming and finish product rolling in two processes, and the equipment and process are used for improving the internal quality of the continuous casting slabs effectively. According to the equipment and process, a window period after the core portions of the continuous casting slabs are just concreted and the blank temperature difference condition that the temperature of the surfaces is lower than that of the core portions are adopted, proper pressure is applied to the lower surfaces of the continuous casting slabs in double directions, certain downward-pressing amount is generated, and meanwhile the deformation speed is controlled according to the speed of a rolling mill, so that metal deformation is deeply conducted on the core portions of the casting slabs, metal flow compensates for shrinkage of the continuous casting slabs, center porosity and cavity shrinkage are eliminated, dendritic segregation and crystal boundary segregation are broken, and the unique structure property is achieved.

Description

technical field [0001] The invention relates to a device and a process for rolling a continuous casting slab with a convex roll by utilizing waste heat of the continuous casting slab, and belongs to the technical field of continuous casting slab rolling equipment and technology. Background technique [0002] In the rolling process of continuous casting slabs, for rectangular or square special steel continuous casting slabs, especially medium-high carbon continuous casting slabs with large cross-sections, due to the characteristics of steel types, volume shrinkage will occur after solidification, and inevitably It will produce more serious center segregation, porosity and shrinkage cavity. [0003] At present, the production process of special steel rods and wires is generally: primary smelting (converter or electric furnace) - refining (LF or VD or RH) - continuous casting - billet slow cooling (or hot delivery) - heating - (billet opening - slow cooling - heating) - contin...

AI Technical Summary

Problems solved by technology

At this time, the temperature is high and the deformation is easy. However, since the reduction is online deformation and the billet has not been cut, its rotation speed must match the casting speed of the casting machine. The speed fluctuation of the large reduction device will directly affect the stability of the liquid level of the mold. It is easy to cause fluctuations in the liquid level to form slag, which affects the purity of the slab

In addition, the reduction temperature window period of this process is small, and the opportunity is fleeting. It is necessary to jointly control the cooling, casting speed, vibration, electric stirring and other parameters of the continuous casting machine and the large reduction device, which has high requirements for the control system. High temperature control requirements

Moreover, each stream needs to be equipped with a separate device, which requires a small space, large investment, and high quality risk

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