▎ 摘　　要

NOVELTY - The method involves pouring refined molten steel into a tundish to make superheat of molten steel in the tundish be 30-40 degreesC. The molten steel is injected into a crystallizer to cool, and the molten steel surface in the crystallizer is covered with a protective slag for protecting molten steel, where the thickness of the protection slag is 5-10 mm. The melted steel is cooled and crystallized along the inner wall of the crystallizers to form a solidified blank with molten steel as the liquid core. The solidified billet is pulled out from the outlet of the tundishing machine to obtain a continuous casting blank. The temperature of the continuous casting billet in the straightening and withdrawal machine is controlled at 1150-1250 degreesC after the middle rough rolling machine set, water spraying and cooling, the surface temperature controlled at 950-980 degreesC, the width of the intermediate billet controlled at 80-120 cm. USE - Non-head continuous casting and rolling production method of rod and wire product used in steelmaking production. Can also be used in national defense construction. ADVANTAGE - The method saves the cost of construction, reduces the energy consumption of the device, simplifies the process of the construction operation, and effectively improves the continuous casting and rolling quality of the bar product, improves the production efficiency, and provides a process flow that is short, easy operation, low energy consumption, not only can reduce processing cost, but also can effectively improve the product quality and production efficiency rod wire product without head continuous casting or rolling production process. The welding method not only has fast welding speed, effectively reducing the complexity of the production cost and process, and using the welding mode of the metal welding wire melting, which can effectively increase the connection strength between the welding joint. DETAILED DESCRIPTION - The method involves pouring refined molten steel into a tundish to make superheat of molten steel in the tundish be 30-40 degreesC. The molten steel is injected into a crystallizer to cool, and the molten steel surface in the crystallizer is covered with a protective slag for protecting molten steel, where the thickness of the protection slag is 5-10 mm. The melted steel is cooled and crystallized along the inner wall of the crystallizers to form a solidified blank with molten steel as the liquid core. The solidified billet is pulled out from the outlet of the tundishing machine to obtain a continuous casting blank. The temperature of the continuous casting billet in the straightening and withdrawal machine is controlled at 1150-1250 degreesC after the middle rough rolling machine set, water spraying and cooling, the surface temperature controlled at 950-980 degreesC, the width of the intermediate billet controlled at 80-120 cm. The intermediate blank is cooled by water spraying after being discharged from the blooming mill set. The forward intermediate billet after rough rolling and the subsequent intermediate billet next to the forward intermediate billet is moved out by a conveying roller. The temperature of the intermediate billet after the butt joint is detected, if the temperature meets the requirement of the inlet temperature of the continuous rolling unit, not performing temperature compensation, if the temperature is insufficient. The temperature compensation is performed on the continuous casting billet by using an automatic heating device, and head cutting before the intermediate billet enters the continuous rolling unit. The intermediate billet is subjected to temperature compensation into a rolling mill of a continuous rolling unit to carry out continuous rolling to obtain a primary rolled piece. The head of the primary rolled piece after the continuous rolling is cut by flying shears, then the primary rolled piece is allowed to enter a reducing sizing mill set for finish rolling and reducing to obtain a rod and wire product with a target specification, wherein the inlet temperature of finish rolling and reducing is controlled to be 800-850 degrees Celsius, the speed is controlled to be 5-10 m/s, and the pass of the reducing sizing mill set is 2-3 times. The rod and wire products are cooled with the target specification by water mist, the rod and wire products are placed on a cooling bed, the surface temperature of the rod and wire products are reduced with the target specification to below 360 degrees Celsius, collected, cut to length, collected and bundled. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a flow structure of a butt joint and temperature compensation process in conveying of conveying rollers between a primary rolling unit and a continuous rolling unit. Conveying roller (1) Front cutting machine (2) Back cutting machine (3) Welding wire conveyor (4) Laser ray welding device (5) Welding groove (6) First door-shaped frame (7) Infrared temperature measuring instrument (9) Upper lifting mechanism (10) Upper supporting frame (11) Upper side electromagnetic induction heating plate (12) Lower side lifting mechanism (13) Lower supporting frame (14) Lower side electromagnetic induction heating plate (15) Controller (16)