Annular bin system of large submerged arc furnace

Abstract

The invention relates to an annular bin system of a large submerged arc furnace. The annular bin system comprises bins, a first-layer platform, a second-layer platform and material pipes in one-to-one correspondence with the bins, wherein all of the bins are distributed around the axis of the system and are equally divided into three groups; the bins are supported on the first-layer platform; the tops of the material pipes are connected with the bottoms of the bins; the material pipes are provided with rod valves, manual gate valves, support sections, vertical sections, oblique sections, transition short sections and vertical outlet sections from the top to the bottom; the material pipes are supported on the second-layer platform, and all of the material pipes are correspondingly divided into three groups with the bins; the material pipes located at the front end of the three groups of material pipes share one transition short section and one vertical outlet section, and the shared vertical outlet section is located at the axis of the system; an outlet of the vertical outlet section of each group of material pipes can form a circle; and the three circles formed by the three groups of material pipes are equal and are uniformly distributed around the axis of the system. The distribution of the material pipes of the system is reasonable, the arrangement of electrodes is facilitated, and the even heating of raw materials and the consumption balance of the raw materials are facilitated.

Description

technical field [0001] The invention belongs to the field of metallurgical equipment, and in particular relates to a large-scale submerged arc furnace annular feed bin system. Background technique [0002] Submerged arc furnace, also known as electric arc furnace or resistance electric furnace, is mainly used for reducing and smelting ore, carbonaceous reducing agent and flux and other raw materials. The working feature is to use carbonaceous or magnesia refractory materials as the furnace lining, use self-improvement electrodes, and insert the electrodes into the charge for submerged arc operation. The energy and current of the arc are used to pass through the charge, and the energy generated by the resistance of the charge is used to smelt the metal. Intermittent iron slag tapping, an industrial electric furnace with continuous operation. Submerged arc furnace is an industrial electric furnace with huge power consumption. It is mainly composed of furnace shell, furnace co...

AI Technical Summary

Problems solved by technology

For submerged arc furnaces above 40MVA, 15 or more silos are usually configured. At present, for a large number of silos, the usual practice is to arrange the silos in groups along a straight line and use a belt conveyor to load materials. However, this design The scheme occupies a large area and requires a large investment in the plant. In some cases, the silos are arranged in a circle and fed through the ring feeder. However, this arrangement will have the following problems: 1) The arrangement of the material pipes is unreasonable, which is not conducive to the uniformity of raw materials. Heating is not conducive to the electrode arrangement and the balance of raw material consumption; 2) The ring feeder needs to replenish raw materials according to the actual raw material consumption, but the measured raw material consumption is inaccurate; 3) The material pipe is below the second platform partially unsupported

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