Clean production method for waste water zero discharging in production process of ammonium molybdate

• Main Authors: XIAO LIANSHENG, JU CHENGXIN, XIAO CHAO, CHE WENFANG, CHEN NING, HE YAQING, XU SENMIN, TIAN YONGHONG, XU MINGCHEN, LI QINGWEI, HOU KAI
• Format: Patent
• Language: Chinese; English
• Published: 07.02.2020
• Subjects: CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

Provided is a clean production method for waste water zero discharging in the production process of ammonium molybdate. The method includes the steps that firstly, excessive leaching agents are adopted to leach molybdenum raw materials, leaching solutions and leaching slag are obtained by filtration, and the leaching sag is waste slag; then the molybdenum raw materials, purification agents and theleaching solutions react to realize the purposes of consuming residual leaching agents and removing impurities simultaneously, purification solutions and purification slag are obtained by filtration,and the purification slag is returned to the pressure leaching process; the purification solutions are extracted with amine extractants at the pH value of 4.5-0.5, and pure ammonium molybdate solutions and raffinate are obtained by reverse extraction of ammonium hydroxide; transforming agents and carbon dioxide are added into the raffinate, and calcium sulfate and sodium bicarbonate solutions areobtained by filtration; an