Production process of continuous-casting tandem-rolling coiled sheet of medium thick plate

Abstract

The invention discloses a cut deal blank joint continuous casting and rolling coil manufacturing technique, which is characterized by the following: the conticaster is fillet-bevel crystallizer; the conticaster adopts double-machine four-flow, four-flow in one technique, straight-rolling heat-feed heat-transfer technique and straight-rolling technique; the big mill adopts fore-and-aft edger roll device; the form is adhesion-upper drive-roller; the finishing mill group adopts work roller trending-running and bend bar device; the fine rolling uses raising speed rolling, which has maximum speed at 22.8m / s and roller way speed at 5.89m / s; the front of finishing mill group installs edge-part calorifier, multistage coarse, fine adjusting-valve group, which adopts cool three-stage laminar flow chilling control technique, adds heat cover on delivery roll table, reduces the temperature dropping of intermediate area blank and head-to-tail temperature difference; the automatic system is three-level computer-controlled system. The invention improves the device, manufacturing technique, which improves the product quality.

Description

technical field [0001] The invention belongs to the technical field of metallurgical metal processing, and in particular relates to a production process for continuous casting and rolling of medium-thick slabs. technical background [0002] At present, the continuous hot-rolled strip steel production technology is divided into traditional technology, CSP technology, traditional production process through converter steelmaking, continuous casting of 200mm ~ 250mm thick slab, flame cutting, walking furnace heating, descaling , Rough rolling, shearing, descaling, finishing rolling, laminar cooling, coiling and uncoiling. It has the advantages of complete varieties, high output, flexible production organization, and large product compression ratio. Its main disadvantages are heavy weight of casting machine equipment, long rolling line, high plant building, large land occupation, large equipment investment, large slab warehouse, High energy consumption; CSP production process is...

AI Technical Summary

Problems solved by technology

The disadvantages are that the production line uses a lot of old equipment, the power of the finishing rolling motor is small, the speed of the roller table is low, the water supply capacity is insufficient, the strength of the transmission system of the rolling mill is weak, and the configuration of the power supply system is aging, which restricts the development of this technology to a certain extent. The output cannot reach the required scale, the ability to develop varieties is also limited, and the width accuracy, surface quality and shape control have certain limitations