REMOVAL OF SILICON COMPONENT FROM HYDROCHLORIC ACID PICKLING WASTE LIQUID OF STEEL MATERIAL

摘要

PURPOSE:To effectively remove Si component from a hydrochloric acid pickling waste liquid of a steel material, by stirring the waste liquid and separating into solid and liquid by centrifugal force, thereby accelerating flocculation of SiO2. CONSTITUTION:A hydrochloric acid pickling waste liquid of a steel material is stirred optionally after the addition of 0.5-10g/l of a solid produced by the solid-liquid separation of hydrochloric acid pickling waste liquid of a steel material. The stirred mixture is centrifuged to separate the solid component in the waste liquid.