Scale removal method for hot-rolled narrow strips
A narrow-strip steel passing technology, which is applied in the field of descaling of hot-rolled narrow-strip steel and medium-finish rolling, can solve the problems of inconvenient installation, difficult maintenance, high water consumption, etc. The effect of less water
Active Publication Date: 2015-12-23
HEBEI IRON AND STEEL
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Problems solved by technology
This method is generally to optimize and transform the high-pressure water descaling system, use the original equipment pipeline, or build a set of its own water system, it is necessary to lay special pipelines to connect the water source, the descaling box, and even Water pressurization equipment requires a large investment, consumes a lot of water, is inconvenient to install, consumes a lot after use, and is not easy to maintain
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Embodiment Construction
[0019] The invention relates to a simple descaling method for hot-rolled narrow strip steel, which includes a descaling position, a descaling power source, a descaling medium, a cleaning method of iron oxide scale, and the like.
[0020] In the present invention, the descaling position is moved from before the traditional vertical roll mill to after the vertical roll mill and before the flat roll mill. The compressed air of the strip workshop is used as the power, and the cooling water used in the rolling mill is used as the medium. After mixing with the spray gun, a high-speed The water flow blows to remove the oxide scale on the upper surface of the billet, and at the same time slots on the bottom plate of the steel guide groove, and uses the mechanical friction of the slot to remove the oxide scale on the lower surface of the billet, and passes through the slot on the bottom plate of the guide groove and other neutral gears , use the water flow to wash the iron oxide scale i...
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The invention discloses a scale removal method for hot-rolled narrow strips, and belongs to the technical field of scale removal methods for hot-rolled narrow strips. The method is used for intermediate and precision rolling scale removal of hot-rolled narrow strips. A traditional high pressure water scale removal position is changed. A spray gun is installed behind an intermediate rolling or precision rolling edging mill. Meanwhile, a groove and an opening are formed in a steel through guide groove base plate between the edging mill and a roller mill. A strip billet deforms after passing through the edging mill. Secondary oxide scale on the surface of the strip billet cracks, and at the moment, high-speed water flow is utilized for striking the secondary oxide scale on the upper surface of the strip billet to remove the secondary oxide scale. Meanwhile, the oxide scale on the lower surface of the strip billet is removed through friction and water flow scouring by means of the steel through guide groove base plate, and the good scale removal effect is achieved. The scale removal method is simple in manufacturing, convenient to implement, small in investment, small in water consumption, small in consumption after being used, convenient to maintain and capable of obviously improving the strip steel surface quality. According to the scale removal method, constraints in the prior art are broken through, and the scale removal method is an innovation of the hot-rolled narrow strip scale removal technology and has the remarkable economic benefits.
Description
technical field [0001] The invention relates to a descaling method for hot-rolled narrow strip steel, which is particularly suitable for the descaling of hot-rolled narrow strip steel in intermediate and finish rolling, and belongs to the technical field of descaling method for hot-rolled narrow strip steel. Background technique [0002] At present, some manufacturers of high-quality cold-rolled narrow-strip steel have put forward higher requirements on the surface quality of hot-rolled narrow-strip steel. Manufacturers of narrow strip steel generally have to remove the secondary scale in the middle finish rolling, which is called secondary descaling in some documents. [0003] At present, iron and steel enterprises in various countries widely use high-pressure water descaling or large vertical roll descaling, coupled with the process of high-pressure water spraying. Between the racks of the unit. The special high-pressure water descaling equipment using the high-pressure ...
Claims
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IPC IPC(8): B21B45/08
Inventor 付成安翟永臻杨现亮梁爱国王凡田志强
Owner HEBEI IRON AND STEEL