Method for improving steel charging efficiency of slab heating furnace

Abstract

The invention discloses a method for improving the steel charging efficiency of a plate blank heating furnace. The method comprises the following steps that firstly, a plate blank is conveyed to the front of the furnace through a furnace charging roller way to be positioned; 2, after positioning is completed, waiting for the furnace charging space in the furnace to be vacated; thirdly, after the furnace charging space in the furnace is vacated, a furnace door is lifted, and a steel charging machine forwards pushes and corrects the plate blank from the original position; fourthly, the steel charging machine retreats by 10-30 cm; fifthly, the steel charging machine is lifted to the upper position, and the plate blank is completely lifted up; sixthly, the plate blank is supported by the steel charging machine to move into the furnace to a set position; seventhly, after the steel charging machine reaches the set position, the steel charging machine descends to the lower position, and the plate blank is placed on the fixed beam; and eighthly, in the process that the steel charging machine retreats to the original position outside the furnace, the walking beam starts stepping circulation. The invention relates to the field of slab processing, in particular to a method for improving the steel charging efficiency of a slab heating furnace.

Description

Technical Field

[0001] The invention relates to the field of slab processing, and in particular to a method for improving the steel charging efficiency of a slab heating furnace. Background Art

[0002] The steel rolling heating furnace is mainly used to heat the slab to a certain temperature to change its internal structure and properties, improve the plasticity of the slab and reduce the deformation resistance, so as to facilitate the subsequent rolling process. The slab needs to go through three processes to complete the heating process: steel loading, heating and steel tapping. The steel loading process involves equipment such as steel loading machine, furnace loading roller, furnace door, fixed beam, movable walking beam, etc.

[0003] The steel loading process is strictly carried out step by step according to the above steps. Generally, the next step can be carried out only after the previous step is completed. In the actual production process, when wide billets are discharged from the discharge side of the heating furnace and narrow billets are loaded on the charging side, the steel loading process cannot keep up with the steel discharge rhythm, resulting in empty steps in the furnace, thus affecting production efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is that in the actual production process, when wide billets are discharged from the discharge side of the heating furnace and narrow billets are loaded on the loading side, the steel loading process cannot keep up with the steel discharge rhythm, resulting in empty steps in the furnace, thus affecting production efficiency.

[0005] To solve the above problems, the technical solution adopted by the present invention is as follows: The present invention is a method for improving the steel charging efficiency of a slab heating furnace, comprising the following steps: Step 1: The slab is transported to the front of the furnace through the furnace loading roller to complete the positioning; Step 2: After positioning is completed, wait for the furnace to have its space freed up; Step 3: After the loading space in the furnace is vacated, the furnace door is lifted and the steel loader pushes the slab forward from its original position; Step 4: The steel loader moves back 10-30cm; Step 5: The steel loader is lifted to the upper position to completely lift the slab; Step 6: The steel loader lifts the slab and moves it to the set position in the furnace; Step 7: After the steel loader reaches the set position, it descends to the lower position and the slab is placed on the fixed beam; Step eight, the movable beam starts a stepping cycle while the steel loader is retreating to its original position outside the furnace.

[0006] Furthermore, in step eight, the movable beam is first raised to lift the slab, then the movable beam moves forward to move the slab forward for a certain distance, the movable beam is lowered to place the slab on the fixed beam, and finally the movable beam returns to its original position to complete a step cycle. Generally, the movable beam can vacate the steel loading space after several cycles.

[0007] The beneficial effects achieved by the present invention by adopting the above structure are as follows: the movable beam can be started without waiting for the steel loader to return to its original position. During the process of the movable beam returning to its original position from the lower position of the steel loader, the movable beam can simultaneously start the stepping cycle, thereby freeing up the furnace loading space in advance, reducing the waiting time after the slab is positioned, and effectively improving the steel loading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of the structure of a method for improving the steel charging efficiency of a slab heating furnace proposed by the present invention; DETAILED DESCRIPTION

[0009] The invention discloses a method for improving the steel charging efficiency of a slab heating furnace. Example 1

[0010] The present invention is a method for improving the steel charging efficiency of a slab heating furnace, comprising the following steps: Step 1: The slab is transported to the front of the furnace through the furnace loading roller to complete the positioning; Step 2: After positioning is completed, wait for the furnace to have its space freed up; Step 3: After the loading space in the furnace is vacated, the furnace door is lifted and the steel loader pushes the slab forward from its original position; Step 4: The steel loader moves back 20cm; Step 5: The steel loader is lifted to the upper position to completely lift the slab; Step 6: The steel loader lifts the slab and moves it to the set position in the furnace; Step 7: After the steel loader reaches the set position, it descends to the lower position and the slab is placed on the fixed beam; Step 8: When the steel loader moves back to its original position outside the furnace, the movable beam starts a stepping cycle. First, the movable beam is lifted to lift the slab, then the movable beam moves forward to move the slab forward for a distance, the movable beam drops, and the slab is placed on the fixed beam. Finally, the movable beam returns to its original position, completing a stepping cycle. Generally, the movable beam can make room for steel loading after several cycles, as shown in the attached manual. Figure 1 shown. Example 2

[0011] The present invention is a method for improving the steel charging efficiency of a slab heating furnace, comprising the following steps: Step 1: The slab is transported to the front of the furnace through the furnace loading roller to complete the positioning; Step 2: After positioning is completed, wait for the furnace to have its space freed up; Step 3: After the loading space in the furnace is vacated, the furnace door is lifted and the steel loader pushes the slab forward from its original position; Step 4: The steel loader moves back 10cm; Step 5: The steel loader is lifted to the upper position to completely lift the slab; Step 6: The steel loader lifts the slab and moves it to the set position in the furnace; Step 7: After the steel loader reaches the set position, it descends to the lower position and the slab is placed on the fixed beam; Step 8: When the steel loader moves back to its original position outside the furnace, the movable beam starts a stepping cycle. First, the movable beam is lifted to lift the slab, then the movable beam moves forward to move the slab forward for a distance, the movable beam drops, and the slab is placed on the fixed beam. Finally, the movable beam returns to its original position, completing a stepping cycle. Generally, the movable beam can make room for steel loading after several cycles, as shown in the attached manual. Figure 1 shown. Example 3

[0012] The present invention is a method for improving the steel charging efficiency of a slab heating furnace, comprising the following steps: Step 1: The slab is transported to the front of the furnace through the furnace loading roller to complete the positioning; Step 2: After positioning is completed, wait for the furnace to have its space freed up; Step 3: After the loading space in the furnace is vacated, the furnace door is lifted and the steel loader pushes the slab forward from its original position; Step 4: The steel loader moves back 30cm; Step 5: The steel loader is lifted to the upper position to completely lift the slab; Step 6: The steel loader lifts the slab and moves it to the set position in the furnace; Step 7: After the steel loader reaches the set position, it descends to the lower position and the slab is placed on the fixed beam; Step 8: When the steel loader moves back to its original position outside the furnace, the movable beam starts a stepping cycle. First, the movable beam is lifted to lift the slab, then the movable beam moves forward to move the slab forward for a distance, the movable beam drops, and the slab is placed on the fixed beam. Finally, the movable beam returns to its original position, completing a stepping cycle. Generally, the movable beam can make room for steel loading after several cycles, as shown in the attached manual. Figure 1 shown.

[0013] It should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A method for improving the steel charging efficiency of a slab heating furnace, characterized in that: The steps include: Step 1: The slab is transported to the front of the furnace through the furnace loading roller to complete the positioning; Step 2: After positioning is completed, wait for the furnace to have its space freed up; Step 3: After the loading space in the furnace is vacated, the furnace door is lifted and the steel loader pushes the slab forward from its original position; Step 4: The steel loader moves back 10-30cm; Step 5: The steel loader is lifted to the upper position to completely lift the slab; Step 6: The steel loader lifts the slab and moves it to the set position in the furnace; Step 7: After the steel loader reaches the set position, it descends to the lower position and the slab is placed on the fixed beam; Step eight, the movable beam starts a stepping cycle while the steel loader is retreating to its original position outside the furnace.

2. A method for improving the steel charging efficiency of a slab heating furnace according to claim 1, characterized in that: In step eight, the movable beam is first raised to lift the slab, then the movable beam moves forward to move the slab forward for a certain distance, the movable beam is lowered to place the slab on the fixed beam, and finally the movable beam returns to its original position to complete a step cycle. Generally, the movable beam can make room for steel installation after several cycles.

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