Main Safety Technologies For Ironmaking Production

Safety technology for blast furnace charging system:
The charging system continuously feeds the raw materials according to the requirements of blast furnace smelting. The loading system includes the transportation, storage, discharge, transportation, and furnace top loading of raw materials and fuels. The loading system should minimize loading, unloading, and transportation processes as much as possible, improve mechanization and automation levels, and ensure safe operation.
(1) Transportation, storage, and material release system. Most of the raw materials and fuels for large and medium-sized blast furnaces are transported by belt conveyors, which are easier to automate and control dust than train transportation. The storage tank is not equipped with barriers or the barriers are incomplete, and there are no railings around it, which poses a risk of falling into the tank when walking; The shape of the material trough is improper and there are blind spots that need to be manually cleaned; The inner lining is worn and the working conditions during maintenance are poor; The malfunction of the material gate is often caused by manual poking, and sudden collapse of the material often leads to injury. The dust concentration during material discharge is high, especially when using a tape machine and vibrating screen to screen the material, the working environment is even worse. Therefore, the structure of the ore storage tank should be permanent and very sturdy. The shape of each groove should achieve automatic and smooth feeding, and the inclination angle of the groove should not be less than 50 ° to eliminate the phenomenon of manual feeding. Metal ore tanks should be equipped with vibrators. Reinforced concrete structures should have wear-resistant lining plates laid on the inner walls; The inner lining plate for storing hot sintered ore should be heat-resistant. A barrier must be installed on the mining tank, with railings around it and kept in good condition. The material tank should be equipped with a material level indicator, and the discharge port should use a valve with flexible opening and closing, preferably a hydraulic gate. A completely enclosed dust removal facility should be used for the discharge system.
(2) Raw material conveying system. Most blast furnaces use the inclined bridge feeding method with material carts, which must have two opposite inlet and outlet ports and be equipped with waterproof and dustproof measures. There should be a pedestrian ladder on one side that meets the requirements and leads to the furnace top. The discharge direction of the discharge port must be consistent with the operating direction of the tape machine, and anti deviation and slip devices should be installed on the machine. The tape machine is prone to injury during operation, so maintenance, refueling, and cleaning work must be carried out only after stopping the machine.
(3) Top furnace loading system. Usually, bell shaped loading is used to charge the blast furnace. The bell type loading system is centered around a large bell and consists of a large bell, hopper, driving equipment for opening and closing small and large clocks, measuring tape, rotating fabric, and other devices. High voltage operation must be equipped with a pressure equalization and relief device. Ensure proper sealing between various devices, especially during high-pressure operations. Poor sealing not only causes components of the device to be washed away by gas, shortening their service life, but may also lead to accidents such as large clocks falling into the furnace. The opening and closing of the material clock must comply with safety procedures. Therefore, the devices must be interlocked to prevent human error.