Countermeasures for reforming converter dust

Based on the above analysis and experience in practice, we have taken the following measures:

(1) Keep the height of the bottom of the furnace as constant as possible and stabilize the working gun position as much as possible. It is required that the operator must measure the gun position every shift to ensure that the height of the bottom of the furnace is relatively stable during the daily smelting process, and the shape of the molten pool in the furnace can be maintained by means of filling the furnace.

(2) The implementation of the movable hood is linked to the blowing time, and each furnace must be lowered to minimize the amount of air inhaled.

(3) According to the actual situation of the dust removal equipment of our factory, the water-cooled jacket is added, which not only reduces the temperature of the article, but also doubles the service life of the article. According to the current loading and oxygen supply intensity, the diameter of the throat of the first and second texts is expanded. The article is expanded from <530 to <600, and the second throat is expanded from 470mm@650mm to 478mm@890mm. High, 23kPa higher than the design, the second text resistance is low, 45kPa lower than the design value. After the transformation, the resistance value of the first and second texts is reasonably distributed. The resistance value of one text is 3kPa, and the resistance value of the second text is 1014kPa. The dust content of the exhaust gas is within the required range. Moreover, the shrinkage angle and the expansion angle of a text have reached the design requirements, reducing the ash accumulated in the article and the flue.

(4) Increasing the atomization efficiency of one water To improve the efficiency of coarse dust removal, it is necessary to increase the atomization degree of water. First, the nozzle is changed into a spiral nozzle, and the nozzle is not easy to block and achieve high atomization. The degree of coarse dust removal is improved. In addition, the position of the nozzle is increased from 400mm to 900mm from the throat, so that the entire throat of the article is covered by water mist, so that the smoke is completely covered by water mist, which improves the dust removal effect.

(5) Reconstruction of the dehydrator

1) Gravity dehydrator is changed to backpack dehydrator, rubber injection molding machine and its internal size is increased, the flow rate is reduced to 46mPs, and the flue gas exhaust and dehydrator are not centered, thus reducing the leakage of gas in the drainage. The safety factor increases the service life of the dehydrator.

2) 90 degree elbow dehydrator, increase the size of the structure, the inlet size is expanded to 980@1120mm, the outlet size is expanded to 1230@1120mm, the end of the internal partition is rolled up by the human-shaped 0-shaped baffle, and the discharge is increased on both sides. Tube, greatly improving the dehydration effect.

3) The wet rotary dehydrator is changed to a cyclone dehydrator, and the overall height is increased from 5.4mm to 11.6mm. The swirling impeller is added 1.5mm from the bottom of the cyclone dehydrator to ensure that the flue gas flows in the dehydrator. The shape rises and the dehydration effect is enhanced.

After continuous groping and transformation, the control of converter dust has made great progress, the dust content of the flue gas is reduced, and the phenomenon of fire in front of the furnace is basically stopped. When an abnormality occurs, it is possible to accurately determine the fault and achieve a targeted target. The phenomenon of ash accumulation in the flue is significantly reduced, which reduces the labor intensity of workers. However, there are also deficiencies, such as: insufficient fan capacity, directly affecting the dust removal effect; the layout of the turbid water structure is problematic, resulting in difficult control of the turbid water index, affecting the purification effect, etc. to be resolved.

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