RU2021873C1 - Method to transfer continuous slabs - Google Patents

Abstract

FIELD: metallurgy, continuous casting thin slabs. SUBSTANCE: length of roller-trolley and length of receiving roller table of heating furnace are changed concurrently by the same value when slabs transporting transversely. EFFECT: increased productivity. 1 dwg

Description

 The invention relates to metallurgy, and more particularly to the continuous casting of thin slabs.

 A known method of transporting continuously cast billets, including the transportation of continuously cast billets along the discharge roller table from continuous metal casting plants into the operating area of a crane with tongs, which transfers the billets to a warehouse.

 The disadvantage of this method is the inability to transport thin slabs. This is due to the fact that thin slabs have a large length with a small thickness. In these conditions, after the capture of a thin slab by a cleaning crane using tick-borne grippers, the slab bends under the action of its own weight. During transportation, the slab cools and takes a curved shape. Slabs curved in the longitudinal direction require straightening. Otherwise, curved slabs are defective and not subject to further redistribution.

 The closest in technical essence is the method of transporting continuously cast billets, including transporting continuously cast billets along the discharge roller table from continuous metal casting plants to the area of operation of a cleaning crane with a tong grab and a single self-propelled cart with a drive roller table (roller table carriage). In the process of continuous casting, the continuously cast billet cut to the measured length is transported along the discharge roller table to the roller table - a trolley that delivers the billet to the warehouse. It is possible to transport the workpiece to the warehouse using a harvesting crane (Tselikov A.I. et al. Machines and assemblies of metallurgical plants. M; Metallurgy, 1978, v.2, p.131-132, fig. IV.2).

 The disadvantage of this method is the lack of universality of a single roller conveyor of constant length when transporting thin and long slabs from several continuous metal casting plants to one loading roller table of a continuous heating furnace for further transportation to the rolling mill. This is because the length of the slabs and their number can be different. Under these conditions, the roller table should have a considerable length for the simultaneous acceptance of several slabs. When transporting short slabs, a large rolling table trolley must be used in terms of size and weight, which leads to an excessive consumption of electricity and deterioration of mechanisms.

 The purpose of the invention is to increase the versatility of the transportation process and the durability of roller conveyors, as well as reducing energy for transporting continuously cast billets.

 The indicated technical effect is achieved by transporting continuously cast billets in the longitudinal and transverse directions on a self-propelled carriage with a drive roller table (roller table carriage) from the discharge roller tables of several continuous casting plants to the receiving roller table of a heating furnace. When transporting continuously cast billets in the transverse direction, the length of the rolling table and the length of the receiving table of the heating furnace are simultaneously changed by the same amount.

 Increasing the universality of the process of transporting continuously cast billets will be achieved due to the possibility of using roller conveyors and a receiving furnace roller conveyor of various lengths. The durability of the rolling table trolleys will be achieved through the use of roller tables of various lengths as necessary, which eliminates the idle mileage of trolleys of large length and weight. Reducing energy will be achieved by reducing idle runs of roller conveyors of large dimensions and weight.

 The analysis of patent and scientific and technical literature shows the lack of coincidence of the hallmarks of the proposed method with the hallmarks of the known technical solutions. Based on this, it is concluded that the proposed method meets the criterion of "inventive step".

 The drawing shows a transportation scheme of continuously cast billets between continuous casting plants and a heating furnace.

 The transportation scheme for continuously cast billets consists of roller tables 1 and 2, continuous metal casting plants with exhaust rollers 3, 4, 5 and 6 of heating furnaces, with receiving roller tables 7 and 8, respectively. The length of the roller table 1 is indicated by l, the roller table trolleys 2 - n, the length of the receiving roller table of the heating furnace 8 - m. Positions 9 and 10 indicate continuously cast billets, 11 - rails.

 A method of transporting continuously cast billets is as follows.

 PRI me R. In the process of continuous casting at plants 3, 4, 5 and 6, 3sp steel is poured and rectangular ingots of 70x1200 mm are drawn at a speed of 3 m / min. The molded slabs are cut with a gas cutter to measured lengths of 25 and 40 m. The resulting workpieces 9 and 10 are discharged from the units 3, 4,5 and 6 along the live rolls in the longitudinal direction and are transferred in the transverse direction to the receiving using single roller conveyors 1 and 2 live rolls 7 and 8 of the continuous heating furnace A and B. Next, continuously cast billets are rolled onto a sheet with a thickness of 8 mm. Roller carts 1 and 2 are equipped with drive rollers for the longitudinal movement of the workpieces 9 and 10. Roller carts 1 and 2 are moved along the rails 11 under the influence of independent drives in the direction transverse to the workpiece.

 The length of the roller table 1 is l = 25 m, the roller table 2 is n = 15 m, the length of the roller table is 7 and 8 m = 10 m. When transporting workpieces 9 with a length of 25 m, use the roller table 1. In this case, the length of the receiving table 7 for furnace A is m + n = 10 + 15 = 25 m. This length of the receiving roller table is set by placing the roller table 2 in front of the roller table 7.

 When transporting workpieces 10 with a length of 40 m, two coupled roller tables 1 and 2 with a total length l + n = 25 + 15 = 40 m are used. In this case, the length of the receiving roller table 8 for furnace B is m = 10 m.

 Thus, when transporting continuously cast billets in the transverse direction, the length of the rolling table and the length of the receiving table of the heating furnace are simultaneously changed by the same value n.

 In this example, two heating furnaces A and B are shown. In real conditions, there is one heating furnace in operation: A or B.

 In the General case, the number of installations for continuous casting of metals and roller table trolleys may be more than indicated in the example.

 The application of the proposed method for transporting continuously cast billets can reduce energy consumption for moving roller conveyors by 3.5%.

Claims (1)

 METHOD FOR TRANSPORTING CONTINUOUS PREPARATIONS, including the transportation of continuously cast billets in the longitudinal and transverse directions on self-propelled carts with drive rolls (rolling table carriage) from the discharge conveyors of several continuous casting plants to the receiving conveyor of the heating furnace, characterized in that at the same time change the length of the rolling table and the length of the receiving roller table of the heating furnace by the same weight Jicin.

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