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Metallurgical Industry

2019-07-30 17:09:56

 
 
Metallurgical Industry Capability
Blast furnace ironmaking is the use of iron-containing raw materials (sinter, pellet or iron ore), fuel (coke, coal powder, etc.) and other auxiliary materials (limestone, dolomite, manganese ore, etc.)
The blast furnace is charged into a certain proportion, and hot air is blown into the blast furnace to help the coke burn, and the raw materials and fuel are lowered as the smelting process in the furnace progresses.
In the process of falling material and gas rising, heat transfer, reduction, melting and decarbonization occur successively to produce pig iron.
The impurities in the iron ore raw material are combined with the flux added to the furnace to form a slag, and the molten iron at the bottom of the furnace is intermittently discharged into the molten iron tank.
Sent to the steel mill. At the same time, it produces blast furnace gas and slag two by-products. After blast furnace slag water quenching, all of them are used as raw materials for cement production.
 
 
Blast furnace ironmaking process and principle
The ironmaking process is essentially the process of reducing iron from its natural form, iron-containing compounds such as ore.
The iron making method mainly includes a blast furnace method, a direct reduction method, a smelting reduction method, etc., and the principle is that the ore is in a specific atmosphere.
(Reducing substances CO, H2, C; suitable temperature, etc.) obtaining reduced iron by physical reaction
Except for a small part of the pig iron used for casting, most of it is used as a raw material for steelmaking.
Blast furnace ironmaking is the main method of modern iron making, an important link in steel production
This method is developed and improved from the ancient shaft furnace ironmaking.
Although many countries have developed many new ironmaking methods, they have good economic indicators for blast furnace ironmaking.
The process is simple, the production volume is large, the labor productivity is high, and the energy consumption is low. The iron produced by this method still accounts for more than 95% of the total iron production in the world.
In the blast furnace production, iron ore, coke, slag flux (limestone) is loaded from the top of the furnace, and preheated air is blown from the tuyere at the lower part of the furnace along the circumference of the furnace.
At high temperatures, carbon in coke (some blast furnaces also spray auxiliary fuel such as pulverized coal, heavy oil, natural gas, etc.) and carbon monoxide and hydrogen produced by combustion of oxygen in the air.
The oxygen in the iron ore is removed during the ascent in the furnace, thereby reducing the iron. The molten iron is discharged from the iron mouth
The impurities that are not reduced in the iron ore are combined with a flux such as limestone to form slag, which is discharged from the slag port. The generated gas is exported from the top of the furnace
After dedusting, it is used as fuel for hot blast stoves, heating furnaces, coke ovens, boilers, etc.
 
The main process electrical and instrumentation control system uses Rockwell's ControlLogix control system.
The under-slot and loading system, the top and body system, the hot blast stove and the cast iron system, the blowing and pulverizing system, and the water treatment system CPU are redundantly configured.
Gas purification system, slag system adopts single CPU control, CPU and HMI fault-tolerant server adopt redundant Ethernet network
The communication between the CPU and the I/O module uses a redundant ControlNet network, while the PLC power supply uses a redundant power supply.
 

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Moore Automation can find any automated spare parts and deliver them in the shortest possible time.
Can help you prevent malfunctions, minimize downtime, reduce spare parts waiting pressure.
 

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