Safety technology for charging system of the hotte

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Safety technology of blast furnace charging system

the charging system is to continuously feed blast furnace smelting according to the blank required by blast furnace smelting. The charging system includes the transportation, storage, discharging, transportation of raw materials and fuels, and charging on the furnace top. The loading system should reduce the handling and transportation links as much as possible, improve the mechanization and automation level, and make it operate safely

(1) transportation, storage and discharging system. Most of the raw materials and fuels of large and medium-sized blast furnaces are transported by belt conveyor, which is easier to automate and control dust than train transportation. The ore storage tank is not paved with barriers or the barriers are incomplete, and there are no railings around, so people may fall into the tank when walking; The shape of the chute is improper, and there are dead corners, which requires 1 person Power on workers to clean up; The lining is worn, and the working conditions are poor during maintenance; If the material gate fails, it is often poked manually. If the material suddenly collapses, it will often cause injury. The dust concentration during discharging is very high, especially when the belt conveyor and vibrating screen are used to screen the materials, the working environment is even worse. Therefore, the structure of the ore storage tank should be permanent and very solid. The shape of each groove should be automatically and smoothly cut, and the inclination of the groove should not be less than 50, so as to eliminate the phenomenon of manual poke. The humidity of gold and many other materials may play a very important role in mechanical properties, and vibrators should be installed in ore tanks. For reinforced concrete structure, wear-resistant lining plate shall be laid on the inner wall; The lining board for storing hot sinter shall be heat-resistant. Barriers must be set on the ore tank, and railings must be set around it, which must be kept intact. The material trough shall be equipped with a material level indicator, and the discharge port shall select a valve with flexible switch, preferably a hydraulic gate. Completely enclosed dust removal facilities shall be used for the discharge system

(2) raw material conveying system. Most blast furnaces adopt the charging method of hopper car inclined bridge. The hopper car must be equipped with two opposite entrances and exits, and waterproof and dust-proof measures. One side should be equipped with a pedestrian ladder that meets the requirements of other parts and is completely consistent with EU standard 1 to the furnace top. The discharging direction of the discharge port must be consistent with the running direction of the belt conveyor, and the machine should be equipped with anti deviation and slip devices. The belt conveyor is easy to hurt people during operation, so it must be stopped before maintenance, refueling and cleaning

(3) top furnace charging system. The long-term stability of polyurethane is no problem, and the bell type charging is usually used to charge the blast furnace. The bell type charging is centered on the big clock, which is composed of big clock, hopper, big and small clock opening and closing driving equipment, probe, rotating cloth and other devices. Pressure equalizing and discharging devices must be set for high-pressure operation. Do a good job of sealing between the devices, especially during high-pressure operation. Poor sealing will not only cause the components of the device to be washed by gas, shorten the service life, and even cause the big clock to fall into the furnace. The opening and closing of the bell must comply with the safety procedures. Therefore, the relevant equipment must be interlocked to prevent human error

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