Abnormal slab disposal method for improving hot charging and hot delivery rate

Abstract

The invention discloses a disposal method for improving the hot charging and hot delivery rate of abnormal slabs. A steel plant timely informs steel-making quality inspection of defect information such as production process parameter fluctuation and process abnormality; corresponding defect codes are set for steel billet defects in a production and marketing system, and the quality of final finished products is not affected by the abnormal slabs; defect markers such as mixed pouring, head and tail slabs, component out-of-tolerance and process abnormality are defined and set as Y; and the production and marketing system defaults the normal process flow direction for the defective slabs with the markers as Y. For the abnormal slabs which can affect the quality of the final finished products, defects such as width-adjusting slabs, cracks, sizes and components out of the national standard are defined, offline disposal is conducted in the steel-making process, and the markers are set as N. The defective slabs marked as N cannot be put into service by the system according to an original contract. Corresponding logical relationships, planning organization and comprehensive disposal are set. According to the disposal method, hot charging and hot delivery production of the abnormal slabs can be achieved without interruption of heat, production of products with orders and contracts is ensured, and the spot goods rate is decreased.

Description

technical field

[0001] The invention relates to a method for disposing of abnormally defective slabs for increasing the rate of hot charging and heat delivery of a strip hot rolling mill, in particular to a method for disposing of abnormal slabs for increasing the rate of hot charging and heat delivery. Background technique

[0002] The traditional plate production line is composed of steelmaking, slab warehouse, and rolling mill. When the plate production line has many varieties, the slab warehouse can play the role of process matching and buffering. In recent years, with the increasing pressure of energy saving, consumption reduction, efficiency improvement and cost reduction, traditional slab production lines have higher and higher requirements for the efficiency of slab hot charging and hot delivery.

[0003] Under normal circumstances, plate products are in the futures mode, and steel mills organize production according to user needs. After obtaining a certain number of...

Examples

Embodiment Construction

[0015] The present invention further illustrates in conjunction with steel factory example:

[0016] A hot rolling unit plans to produce 2,000 tons of SPHC (tapping code AP1461C1) and 200 tons of Q215A (tapping code GR4161C2). The last heat of SPHC will be mixed with the first heat of Q215B. In terms of quality level, the tapping mark of AP1461C1 is higher than that of GR4161C2. In the slab production process, there will inevitably be AP1461C1 head billet (defect code ED03), water-changing billet (defect code ED07), mixed casting billets of different steel types (defect code ED09), and liquid level fluctuation billets (defect code ED12), tundish nodule blanks (defect code ED13), these are defective blanks that belong to the setting range of the marker "Y" and can be hot-packed and hot-delivered. The steps of hot charging and hot delivery for the abnormal billet with the tapping mark of AP1461:

[0017] 1. The steelmaking process organizes the production of AP1461C1 and GR41...

technical field

[0001] The invention relates to a method for disposing of abnormally defective slabs for increasing the rate of hot charging and heat delivery of a strip hot rolling mill, in particular to a method for disposing of abnormal slabs for increasing the rate of hot charging and heat delivery. Background technique

[0002] The traditional plate production line is composed of steelmaking, slab warehouse, and rolling mill. When the plate production line has many varieties, the slab warehouse can play the role of process matching and buffering. In recent years, with the increasing pressure of energy saving, consumption reduction, efficiency improvement and cost reduction, traditional slab production lines have higher and higher requirements for the efficiency of slab hot charging and hot delivery.

[0003] Under normal circumstances, plate products are in the futures mode, and steel mills organize production according to user needs. After obtaining a certain number of...

Examples

Embodiment Construction

[0015] The present invention further illustrates in conjunction with steel factory example:

[0016] A hot rolling unit plans to produce 2,000 tons of SPHC (tapping code AP1461C1) and 200 tons of Q215A (tapping code GR4161C2). The last heat of SPHC will be mixed with the first heat of Q215B. In terms of quality level, the tapping mark of AP1461C1 is higher than that of GR4161C2. In the slab production process, there will inevitably be AP1461C1 head billet (defect code ED03), water-changing billet (defect code ED07), mixed casting billets of different steel types (defect code ED09), and liquid level fluctuation billets (defect code ED12), tundish nodule blanks (defect code ED13), these are defective blanks that belong to the setting range of the marker "Y" and can be hot-packed and hot-delivered. The steps of hot charging and hot delivery for the abnormal billet with the tapping mark of AP1461:

[0017] 1. The steelmaking process organizes the production of AP1461C1 and GR41...