What are the advantages of packaging steel strip hot slides?
by：Hongmei
2021-03-15
What are the advantages of packaging steel strip hot slides?
Answer: The water-cooled pipe ribs and slides used in the push-steel continuous heating furnace are welded by thick-walled steel pipes and square steel (or round steel). The 'black mark' is difficult to eliminate even in the soaking section. For this reason, the hot slide rail is adopted, that is, a thicker metal slide rail is installed on the longitudinal water pipe, and even a heat insulating material is lined between the water pipe and the slide rail, so that the surface of the slide rail has a higher temperature to reduce The cooling effect of the water pipe on the billet. The use of hot slide rails in the steel rolling heating furnace can eliminate the solid bottom of the soaking section, which not only reduces the heat loss, but also strengthens the lower heating due to the full overhead of the bottom of the furnace, so that the 'black mark' of the billet is reduced. The hot slide rail is mainly composed of a slider, a clamping piece and a clamping piece, and its structure is shown in Figure 2-20. The water pipe is wrapped with plastic. The slider is fixed by means of a clamp welded on the rectangular tube. When the steel is pushed, the force generated on the slider is transmitted to the rider through the hook-shaped structure at the tail of the slider. At the same time, in order to prevent the lateral thrust generated by the heated billet when the steel is pushed, the entire sliding The lower part of the block is embedded in the riding clip. In order to facilitate the installation of the slider and solve the problem of thermal expansion of the material, there is a gap of 25-35mm between the front and rear sliders and between the rider and the clamp.
Install the nickel-chromium heat-resistant alloy steel rider and the slider on the upper part of the rectangular tube, and line them with fire-resistant plastic to isolate them, which can reduce the cooling effect of the rectangular tube on the slider. Since the heat received by the rider from both sides is equivalent to the heat transferred from the rider to the furnace bottom tube, the lower surface of the torture is only partially covered by the rider, and the upper surface of the rider is narrow, so the billet only needs to be After a short time of soaking, heat can be transferred from both sides of the slider to the contact between the billet and the slider, so that the billet heating temperature is uniform, and the purpose of eliminating the 'black mark' is achieved.
The hot slide has the following advantages:
(1) Basically eliminate the 'black mark' caused by the contact between the billet and the furnace bottom tube, reduce the temperature difference on the section of the billet, and improve the accuracy and uniformity of the product size.
(2) It can increase the spacing of the heating horizontal water pipes and reduce the number of horizontal water pipes, thereby reducing the heat absorption of the horizontal water pipes and the shielding of the heated billet. In this way, the heating and soaking time is shortened, and the purpose of increasing the output of the furnace and reducing the unit fuel consumption is achieved.
(3) Compared with the furnace with the solid bottom of the soaking section, it can increase the pushing length; eliminate the scratches on the surface of the billet caused by the bottom slag and the heavy slag removal work.
Answer: The water-cooled pipe ribs and slides used in the push-steel continuous heating furnace are welded by thick-walled steel pipes and square steel (or round steel). The 'black mark' is difficult to eliminate even in the soaking section. For this reason, the hot slide rail is adopted, that is, a thicker metal slide rail is installed on the longitudinal water pipe, and even a heat insulating material is lined between the water pipe and the slide rail, so that the surface of the slide rail has a higher temperature to reduce The cooling effect of the water pipe on the billet. The use of hot slide rails in the steel rolling heating furnace can eliminate the solid bottom of the soaking section, which not only reduces the heat loss, but also strengthens the lower heating due to the full overhead of the bottom of the furnace, so that the 'black mark' of the billet is reduced. The hot slide rail is mainly composed of a slider, a clamping piece and a clamping piece, and its structure is shown in Figure 2-20. The water pipe is wrapped with plastic. The slider is fixed by means of a clamp welded on the rectangular tube. When the steel is pushed, the force generated on the slider is transmitted to the rider through the hook-shaped structure at the tail of the slider. At the same time, in order to prevent the lateral thrust generated by the heated billet when the steel is pushed, the entire sliding The lower part of the block is embedded in the riding clip. In order to facilitate the installation of the slider and solve the problem of thermal expansion of the material, there is a gap of 25-35mm between the front and rear sliders and between the rider and the clamp.
Install the nickel-chromium heat-resistant alloy steel rider and the slider on the upper part of the rectangular tube, and line them with fire-resistant plastic to isolate them, which can reduce the cooling effect of the rectangular tube on the slider. Since the heat received by the rider from both sides is equivalent to the heat transferred from the rider to the furnace bottom tube, the lower surface of the torture is only partially covered by the rider, and the upper surface of the rider is narrow, so the billet only needs to be After a short time of soaking, heat can be transferred from both sides of the slider to the contact between the billet and the slider, so that the billet heating temperature is uniform, and the purpose of eliminating the 'black mark' is achieved.
The hot slide has the following advantages:
(1) Basically eliminate the 'black mark' caused by the contact between the billet and the furnace bottom tube, reduce the temperature difference on the section of the billet, and improve the accuracy and uniformity of the product size.
(2) It can increase the spacing of the heating horizontal water pipes and reduce the number of horizontal water pipes, thereby reducing the heat absorption of the horizontal water pipes and the shielding of the heated billet. In this way, the heating and soaking time is shortened, and the purpose of increasing the output of the furnace and reducing the unit fuel consumption is achieved.
(3) Compared with the furnace with the solid bottom of the soaking section, it can increase the pushing length; eliminate the scratches on the surface of the billet caused by the bottom slag and the heavy slag removal work.
