High-pressure water descaling system and descaling method

Abstract

The invention discloses a high-pressure water descaling system. The high-pressure water descaling system comprises two sets of descaling system bodies, namely a heating furnace rear descaling systemand a rolling line descaling system, wherein a heating furnace rear descaling box is a descaling box arranged behind a discharging roller way of the heating furnace, four sides of a billet are descaled, a plurality of rows of waterproof chains are added to prevent water from splashing to a doorway of the heating furnace, a bidirectional billet feeding and discharging design is adopted when inlet and outlet guides of the descaling box are designed, backspacing collision prevention is effectively avoided, the rolling line descaling system is similar to the heating furnace rear descaling system and is composed of a butterfly valve, an automatic cleaning filter, a pressure sensor, an electromagnetic flowmeter, a water pressure gauge, an expansion joint, a high-pressure pump, a high-pressure hose, a high-pressure one-way stop valve, a descaling injection valve, an intermediate rolling descaling box, a finish rolling descaling box and a reducing and sizing descaling box. According to the high-pressure water descaling system, two sets of descaling systems are adopted, the system has the advantages of high water supply capacity, good descaling effect, low investment, low equipment operation cost, small equipment maintenance amount, low maintenance cost and the like.

Description

technical field [0001] The invention relates to the technical field of hot-rolled bar production, in particular to a hot-rolled bar high-pressure water descaling system and descaling method. Background technique [0002] In the hot-rolled bar production line, the billet is rapidly oxidized under high temperature conditions in the heating furnace, and a layer of primary oxide scale with a thickness of 7.5-15 μm will be formed on the surface of the billet. At the same time, during the transportation and rolling process of the heated billet, the surface of the billet will form a secondary oxide scale with the moisture and oxygen in the air. Therefore, the iron oxide scale on the surface of the billet must be removed before rolling, otherwise a large amount of iron oxide scale with higher hardness will adhere to the surface of the billet, which will increase the deformation resistance of the billet and increase the rolling cost and power consumption. At the same time, the remai...

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Problems solved by technology

However, there are many problems in the descaling system currently in production, such as complex structure, high cost, difficult maintenance and poor descaling effect, etc.

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