Iron and steel smelting is an important pillar industry of my country's manufacturing industry. It has high requirements for steel production technology and has many and complicated production processes. In the complicated production processes, a large amount of dust and smoke will be generated.

1. A brief and detailed introduction of part of the process

The key of the steelmaking plant is composed of six parts: the blast furnace itself, the feeding system software, the exhaust system software, the liquefied gas purification equipment, the slag iron solution system software, and the gas generator material system software.

The key production process is: iron raw materials and coke are entered into the elevated road hopper of the steelmaking plant according to the belt conveyor. After screening by vibrating screen, the iron element raw material is sieved into particles above 5 mm, and coke is particles above 20 mm, and then the raw materials are sent to the tank located in the blast furnace rotary kiln according to the loading car. Enter the blast furnace. The blower motor sends the cold air into the hot air boiler according to the cold air pipeline, and it is heated to 1000~1200℃, and then blown into the blast furnace from the 14 air outlets of the blast furnace body through the warm air pipeline. The warm air moves inwardly in the blast furnace, and the original material goes down in the blast furnace. The warm air heats the coke and ignites it, so that the iron raw material is melted and restored under the heat effect, and the copper and carbon elements are produced The oxidation reaction restores iron and slag. The molten steel and slag are discharged according to the taphole, and the molten steel is immediately sent to the ironmaking plant for application by the molten steel truck, and the slag is converted into steel slag and sent to the slag powder plant for application according to the slag flushing ditch.

2. Assessment of working conditions that cause smoke and dust

In the pulverizing system software, the blanking, vibration, and screening of the pulverized coal will cause the pulverized coal to float and overflow during the entire process of vibrating, sieving, and transportation. The accumulation of pulverized coal in the transmission belt and the surrounding environment will cause the following harm:

(1) When the pulverized coal is accumulated in the surrounding environment of the transmission belt, the temperature of the pulverized coal will rise slowly due to the heat generated by the slow oxidation of the pulverized coal, and the rise of the pulverized coal will aggravate the further air oxidation of the pulverized coal, and finally achieve the ignition point of the coal , It will cause the pulverized coal to catch fire. In addition, when the pulverized coal and gaseous compounds are in contact with the fire under a certain standard, there is a high possibility of explosion safety hazards.

(2)The coal powder falls into the air and the workers breathe it into the body during construction, which will cause certain harm to their health.

(3) The pulverized coal deposits on the transmission belt, which is very easy to cause friction with the belt idler, resulting in an increase in the cost of the belt idler and reducing the cycle time of the belt idler replacement.

3. Overview of the smoke and dust solution plan

Regarding the above situation, for the vibrating, grinding, screening, and transportation of coal powder in the pulverizing system software of the steelmaking plant, the drive belt head and tail wheel are equipped with explosion-proof dust removal equipment, and the computer host is equipped with antistatic filter cartridges. Fans, explosion-proof solenoid valves, explosion vents, explosion-proof lamps, explosion-proof temperature sensors, etc. are used to solve ash removal. Seamless steel pipes are used for dust extraction. The tail is solved according to antistatic plastic hoses, which is convenient for driving the tail wheel. Disassembly, assembly and maintenance of the motor and the buffer roller.

In the vibrating screen blanking process, the closed space ventilation solution is carried out according to the production of the vibrating screen room. In addition, the design of repairing doors and windows allows employees to observe the vibrating screen on the spot. Once there is a blockage, it can be shut down and cleared immediately.

In response to the above problems,Pure-Air has developed a new series of explosion-proof dust collectors, which are small in size, high in filtration efficiency, and can meet explosion-proof requirements, and can effectively solve the dust removal requirements of customers' conveyor lines.

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