Shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device and feeding control method

Abstract

The invention discloses a shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device. The shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device comprises a shaft furnace discharge device, an electric arc furnace, a buffer weighing warehouse arranged at an outlet of the shaft furnace discharge device, and a small-dip angle conveying device which is arranged between an outlet of the buffer weighing warehouse and an inlet of the electric arc furnace and is used for conveying a material. The small-dip angle conveying device comprises a feeder, a small-dip angle conveying pipe, a movable elephant trunk and a fixed elephant trunk. The feeder and the small-dip angle conveying pipe are provided respectively with vibrating devices. The shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding device overcomes defects of the existing device, reduces shaft furnace height, device production and maintenance costs, and a one-time investment, enlarges a shaft furnace-electric arc furnace distance range, and has a simple, compact, safe and reliable structure. The invention also discloses a control method of shaft furnace-electric arc furnace direct reduced iron continuous hot-feeding. The method utilizes a sensor and a PLC controller to realize real-time monitoring and parameter adjustment, can be operated flexibly, has high safety and is suitable for continuous production.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a continuous hot-feed feeding device and a feeding control method for reducing iron in a shaft furnace-electric arc furnace. Background technique [0002] Shaft furnace production of reduced iron (DRI) heat transfer electric arc furnace smelting technology can effectively achieve energy saving and emission reduction. At present, the heat transfer technology of shaft furnace reduced iron to electric arc furnace mainly adopts silo slide pipe system, pipeline pneumatic conveying or canned transportation system ; Among them, the silo slide pipe system is suitable for the adjacent scheme of the shaft furnace and the electric arc furnace: the center distance between the two is about 30-40m. This kind of equipment has simple structure, low operating cost, obvious energy saving, and a high level of continuous production of the electric arc furnace; Pneumatic pipeline transportation is s...

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Problems solved by technology

[0003] The Chinese patent application with the application number of 200910085263.6 in the prior art discloses "a device and method for hot charging of electric furnace sponge iron". Although this technology realizes the transportation of hot sponge iron under sealed conditions, there are also corresponding problems. Because the sponge iron is slipped into the electric arc furnace by its own weight, the slide pipe needs to It has a large inclination angle, and the size of the inclination angle directly restricts the height of the shaft furnace and the energy consumption of the equipment.

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