Project Name: Bayuquan coal company Angang blast furnace maintenance project
Project time: November 2013
Project location: Anshan, China
The project is on the Anshan Bayuquan branch of the blast furnace coal injection device for blowing tank emergency relief pressure valve reconstruction and maintenance. This position valve is mainly used for coal powder (85%) coke powder (15%) when the pressure from the sealing effect, to ensure that the bottom pressure can not leak in the process of pressurization and pressure after the injection of pulverized coal injection pressure tank can be pressure relief. Booster pressure tank pressure is generally 12-16 kg, pressure relief when the pressure bit 10-12 kg, that is, the maximum pressure of the valve here 10-12 kg, the maximum flow rate of 2-2.2m/s.
The original customer selection is hard seal ball valve, the ball surface spraying tungsten carbide chromium to strengthen Yingde, but due to the pulverized coal dry friction, resulting in metal hard seal ball valve up with no 3 months completely scrapped. Wuxi Kelke to this device for the transformation of the valve, it is recommended to use ceramic ball valve, ceramic ball valve wear and corrosion resistance, hardness than other metals are much higher than the other, where the ceramic ball valve is suitable.
Practice has proved that the ceramic ball valve used on-site newcomer to the very good effect, not only withstood the pulverized coal and coke powder friction, and leakage volume has a greater assurance, although ceramic ball valve leakage levels cannot achieve zero leakage (leakage class better, the ball and seat to pressure tight and ceramic ball easily broken, so ceramic ball valve leakage level is generally ANSI class V), but can meet customer requirements. The following is a photo of Kell ceramic ball valve.
