Hot charging method and system for continuous casting round billet of hot rolled steel pipe

Abstract

The invention discloses a hot charging method and hot charging system for a continuous casting round billet of a hot rolled steel pipe. The method comprises the following steps: casting the refined molten steel into a continuous casting round billet; cutting the continuous casting round billet into multiple length on a continuous casting round billet production line by a flame gun to form a hot continuous casting round billet, wherein the hot continuous casting round billet with a multiple length at least has two flow directions; sending one part of the hot continuous casting round billet into a pre-heating furnace for pre-heating or heat preservation through a first round billet conveying roller way and then into a high-temperature furnace for heating through a second round billet conveying roller way; directly sending the second part of the hot continuous casting round billet into the high-temperature furnace for heating through the second round billet conveying roller way; performing hot sawing on the hot continuous casting round billet sent into the high-temperature furnace for heating into a specified length by hot sawing equipment; and performing hot centering, perforation and tube rolling on the continuous casting round billet which is hot-sawn into the specified length; and performing the next process. The invention can sufficiently use the heat of the hot continuous casting round billet to save a great amount of fuel, while reducing the required equipment and plants, investment on plant construction and cost on equipment maintenance at the same time.

Description

technical field [0001] The invention relates to a hot-rolled steel pipe continuous casting round billet hot charging method and system. Background technique [0002] At present, there are three types of steel products: hot-rolled steel plate, strip steel, hot-rolled section steel and hot-rolled steel pipe. Among them, the energy consumption of hot-rolled steel pipe is the highest among these three types of steel products. [0003] The steelmaking system of the existing hot-rolled steel pipe, which is a hot-rolled steel pipe continuous casting round billet cold charging system, see figure 1 As shown, it includes a round billet continuous casting machine 1', a round billet rotary roller table 2' is provided on one side of the round billet continuous casting machine 1', and a round billet cooling stand is provided on the side of the round billet rotary roller table 2' 3', to cool the hot continuous casting round billet to normal temperature, and the end of the round billet coo...

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Problems solved by technology

[0005] It can be seen from the above description that the temperature of the hot continuous casting round billet is about 900-1000°C after the flame is cut to length, and then all the hot continuous casting round billets are cooled to normal temperature, that is to say, The heat of hot continuous casting round billet is completely useless and wasted

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