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DETERMINATION METHOD OF SUITABLE AMOUNT OF SULFAMIC ACID FOR REMOVING NOx PRODUCED IN STS PICKLING PROCESS
DETERMINATION METHOD OF SUITABLE AMOUNT OF SULFAMIC ACID FOR REMOVING NOx PRODUCED IN STS PICKLING PROCESS
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机译:STS酸洗工艺中脱硫所用硫酸的适量测定方法
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摘要
PURPOSE: A determination method of a suitable amount of sulfamic acid for removing NOx produced in STS pickling process by calculating a proper amount of sulfamic acid aqueous solution injected into a pickling solution is provided. CONSTITUTION: In a method for removing NOx in a stainless steel pickling process using nitric acid and hydrofluoric acid, the method is characterized in that NOx generated during pickling is removed by continuously injecting a sulfamic acid aqueous solution into a pickling solution at an injection flow rate satisfying the following mathematical expression 1: F/X(NOx)=C, where F is an injection flow rate (ml/min) of the sulfamic acid aqueous solution, X(NOx) is a generation amount of NOx (mg/m¬3), and C is proportional constant for sulfamic acid concentration, wherein the proportional constant C is a slope calculated from the center of a graph illustrating the generation amount of NOx and injection flow rate of the sulfamic acid aqueous solution according to the sulfamic acid concentration.
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