According to the volatile hydrogen chloride is easy soluble in water features, and ferrous chloride in hydrochloric acid solution, the solubility of the law, the use of indirect steam heating, vacuum evaporation concentration process, the gas produced by the evaporation of the condenser is condensed into dilute hydrochloric acid return Inter washing using again; waste acid is concentrated by evaporation ferrous chloride concentration reaches a certain medicinal dilute hydrochloric acid, concentrated liquid is cooled so that crystals in the form of ferrous chloride to precipitate, and then centrifuged to obtain ferrous chloride crystals . 1. The use of vacuum evaporation process hydrochloric acid pickle liquor, technically sound, economically viable, suitable for medium and small-scale iron and steel enterprises hydrochloric acid waste utilization. 2. Due to the reduced evaporation temperature vacuum evaporation test with dilute hydrochloric acid, so extend the life of equipment, reduce maintenance and maintenance cost of the equipment. 3. The energy consumption of less value hydrochloric acid regeneration recovery process may be set off against the cost, so that the processing system can continue to run. The small number of necessary equipment, low investment, and the operation is simple, it is suitable for use in hydrochloric acid pickling, cold-rolled strip of small businesses. Hydrochloric acid, fire safety measures: Hazardous characteristics: with some active metal powder reacts with dilute hydrochloric acid to buy hydrogen. Cyanide case can produce highly toxic hydrogen cyanide gas. The occurrence and reaction with a base, and release a lot of heat. With strong corrosive. Hazardous combustion products: hydrogen chloride. Fire fighting methods: with an alkaline substance such as sodium bicarbonate, sodium carbonate, slaked lime neutralization. It can also be a lot of water to fight the blaze. First aid measures Skin contact: Immediately remove contaminated clothing dilute hydrochloric acid, with plenty of water for at least 15 minutes, and can be applied weakly alkaline substance such as soap and so on. Medical treatment. Eye contact: immediately filed eyelid, with plenty of water or saline thoroughly washed at least 15 minutes. Medical treatment. Inhalation: rapidly from the scene to fresh air. Keep the airway open. If breathing is difficult, give oxygen. If breathing stops, artificial respiration immediately. Medical treatment. Ingestion: Rinse mouth, seek medical advice. Because we are professional so we do better quality at reasonable prices faith-based quality assurance with dilute hydrochloric acid dilute hydrochloric acid _ buy _ Zhengzhou Longda Chemical provided by Zhengzhou Longda Chemical Products Limited. Zhengzhou Longda Chemical Products Co., Ltd. (www.longdahuagong.com/) strong, credible, in Zhengzhou, Henan chemicals industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Zhengzhou Ronda chemicals and you hand into the brilliant, for a better future!