Multiple cooling methods integrated cooling system in strip casting process

Abstract

The invention provides a multiple cooling methods integrated cooling system in the strip casting process, belonging to the technical field of metallurgy. The system comprises air mist cooling devices, water spray cooling devices, water mist spray guns, a water collection tank, a roller table, a beam, a chassis and a casting rolling mill rack, wherein each air mist cooling device comprises first air inlet pipes, first water inlet pipes, air mist nozzles, an air flow regulating valve, a first water flow regulating valve and an air mist cooling spray gun installing support; each water mist spray gun comprises nozzles, a second water inlet pipe and a second water flow regulating valve; and each water spray cooling device comprises a case, a third water inlet pipe, shunt pipes, a deflector, water nozzles and third water flow regulating valves. The system comprises the following advantages: multiple cooling methods such as air spraying, mist spraying, water spraying and the like are integrated on the cooling system and large-scale cooling rate is realized by selecting the types and flow of cooling media and the opening quantity of different nozzles according to the requirement of online different cooling processes for casting and rolling the strips made of different materials to obtain the required structures.

Description

Technical field: [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a cooling system integrated with multiple cooling modes in the thin strip continuous casting process. Background technique: [0002] At present, thin strip continuous casting is a new technology that uses rotating rolls as crystallizers to directly produce 1-5mm thin strips with liquid steel. High, coupled with the influence of deformation during casting and rolling, the thin strip is prone to recrystallization and destroys the initial columnar grain structure. Therefore, the cooling rate at the thin strip continuous casting outlet should be increased to suppress the occurrence of recrystallization. In addition, the grain growth rate of thin strip continuous casting is extremely fast under long-term high-temperature conditions, and the grains of the structure are easy to be too large, and the subsequent hot rolling and cold rolling deformation are small, and the g...

AI Technical Summary

Problems solved by technology

In addition, the grain growth rate of thin strip continuous casting is extremely fast under long-term high-temperature conditions, and the grains of the structure are easy to be too large, and the subsequent hot rolling and cold rolling deformation are small, and the grain refinement cannot be carried out, so that the performance of the finished product reduce

Some steel types need to obtain thin strips with special texture, and it is required that some solute elements should be solid-dissolved in the matrix as much as possible during the solidification and cooling process, that is, before normalization treatment. Elements will be precipitated, and the process needs to increase the solid solution treatment process of high temperature and long-term heating, which makes the process complicated and the cost increases

The cooling system currently used for thin strip continuous casting is simply water tank cooling, which has poor cooling effect and low cooling efficiency, and cannot meet the cooling requirements.

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