Rough rolling descaling method for hot-rolled steel billet

A steel billet and rough rolling technology, which is applied in the field of rough rolling and descaling of hot rolled steel billets, can solve the problems of poor practicability, poor anti-oxidation effect, and incomplete phosphorus removal, so as to reduce adhesion, reduce secondary oxidation, and improve phosphorus removal effect Effect

CN114850233AActive Publication Date: 2022-08-05TANGSHAN GANGLU IRON & STEEL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-08-05

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Abstract

The invention relates to the technical field of hot-rolled steel billet rough rolling, and provides a hot-rolled steel billet rough rolling descaling method, which divides water flow into low-pressure cooling water flow and high-pressure cleaning water flow, realizes step-by-step cooling fracture and cleaning, improves the dephosphorization effect, provides inert gas protection for dephosphorized hot-rolled steel billets, and improves the dephosphorization quality of the dephosphorized hot-rolled steel billets. According to the hot-rolled steel billet rough rolling descaling system, secondary oxidation of hot-rolled steel billets after dephosphorization is reduced, a roller set is provided with an independent cleaning device in a matched mode, adhesion of oxidized scales on the roller set is reduced, reintroduction of the oxidized scales in the rolling process of the hot-rolled steel billets is reduced, and the hot-rolled steel billet rough rolling descaling system is practical and is achieved based on the hot-rolled steel billet rough rolling descaling system. Comprising the following steps that firstly, the hot-rolled steel billet rough rolling descaling system is built in a construction site, electric fitting and debugging of corresponding parts are completed, in the process, a high-pressure water inlet pipe and a water supply tank need to be communicated with an external high-pressure water pipe, and a low-pressure water inlet pipe needs to be communicated with an external low-pressure water pipe; and a gas source of inert gas is communicated with the gas supply box.
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Description

technical field

[0001] The invention relates to the technical field of rough rolling of hot-rolled billets, in particular to a method for rough rolling and descaling of hot-rolled billets. Background technique

[0002] As we all know, in the process of hot rolling a billet, the billet usually needs to be heated, and the heated billet will be oxidized in the air to produce oxidized scales. These scales will not only make subsequent rolling difficult, but also easily penetrate into the billet. Therefore, in order to ensure the smooth rolling of the billet and the guarantee of the quality after rolling, a method for rough rolling and descaling of the hot-rolled billet is proposed.

[0003] After retrieval, the Chinese invention patent with the publication number CN103042055B, which was authorized and announced on June 10, 2015, discloses a method for rough rolling and descaling of a hot-rolled steel billet, which is roughly described as including the first pass on the heated bi...

Examples

Embodiment

[0037] see Figure 1-7 , A method for rough rolling and descaling of a hot-rolled billet is realized based on a rough rolling and descaling system for a hot-rolled billet. The billet rough rolling production line, the hot-rolled rod billet rough rolling production line includes a conveying roller section 2 for billets, a plurality of power conveying rollers 3 are installed in the conveying roller section 2, and a cover frame 4 is connected to the conveying roller section 2, and the cover frame 4 The low-pressure water tank body 5 is installed on the upper through the lifting assembly. The lifting assembly includes two bottom ears 25 and two lifting ears 26. The two bottom ears 25 are fixedly connected to the front and rear ends of the cover frame 4 respectively. A polished rod 27 and a threaded rod 28 are respectively connected, and the two lifting ears 26 are fixedly connected to the front and rear ends of the low-pressure water tank body 5 respectively. The two lifting ears ...