STUDY ON IMPROVING THE STABILITY OF COAL INJECTION PROCESS IN 3 200 m3 BF OF HANSTEEL
The stability of coal injection is of great significance to the operation of blast furnace.In view of the poor stability and difficult uniformity control of 3 200 m3 blast furnace,the stability of coal injection process is improved by improving the coal injection process and transforming the equipment,so as to lay the foundation for the stable running of blast furnace.The transformation of the exhaust device of the injection tank not only can shorten the time of coal loading and provides favorable conditions for pressure vulcanization,but also can prevent coal accumulation and ensure safety.The pres-sure fluctuation of the injection tank is reduced by adding a stable pressure regulating valve,a stable pressure cutting valve and a new small release valve on the pressure regulating device of the coal injection tank with keeping the tank pressure at the set value of±0～5 kPa,thus the stability of the injection rate is improved.
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