Method for producing thin-gauge RE700L steel based on ESP thin slab casting and rolling process

The invention provides a method for producing thin-gauge RE700L steel based on the ESP thin slab casting and rolling process. The method includes the steps that raw materials are selected, wherein the raw materials comprise, by mass percentage: smaller than or equal to 0.06% of C, 0.1-0.40% of Si, smaller than or equal to 1.75% of Mn, 0.02-0.04% of Als, 0.03-0.07% of Nb, 0.04-0.08% of Ti, smaller than or equal to 0.08% of V, smaller than or equal to 0.0020% of S, smaller than or equal to 0.012% of P, smaller than or equal to 0.005% of N and the balance iron; the raw materials are sequentially subjected to converter smelting and LF furnace RH furnace refining; molten steel formed after RH furnace refining passes an ESP production line to generate hot rolled strip steel with different thicknesses, wherein in the ESP production line, the temperature of a rough rolling outlet is 920-980 DEG C, and the temperature of a finish rolling outlet is 800-870 DEG C; and the hot rolled strip steel is cooled in a laminar co