赤泥脱碱回收有价元素无害化资源的工艺
By reacting ammonium chloride with red mud under negative pressure and ambient temperature to generate ammonia gas, and then continuously discharging and separating the ammonia, the problems of land occupation and high cost in red mud treatment are solved. This achieves efficient recovery and low-cost treatment of valuable elements in red mud, thereby improving economic benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANDONG HESHENG ENVIRONMENTAL PROTECTION EQUIPMENT CO LTD
- Filing Date
- 2024-07-02
- Publication Date
- 2026-07-17
AI Technical Summary
Existing red mud treatment methods result in land occupation, environmental pollution, and high costs. Furthermore, traditional ammonium chloride dealkali removal processes are energy-intensive, costly, and have low output, making it difficult to efficiently recover valuable elements from red mud.
Under negative pressure and 25-80℃ conditions, saturated ammonium chloride solution is used to react with red mud to generate ammonia gas and achieve continuous uninterrupted discharge. Subsequently, centrifugal gravity separation and flotation are carried out to separate valuable elements. The reaction of ammonium chloride and red mud generates ammonia gas in an endothermic reaction and the ammonia gas is recovered through a phosphoric acid absorption tower, reducing water escape and energy consumption.
It achieves low-cost and high-efficiency recovery of ammonia, and the reaction efficiency of ammonium chloride with alkali in red mud is high, which reduces operating costs, improves the recovery rate of valuable elements and economic benefits, and the separated materials can be used in multiple industries.
Smart Images
Figure CN118831937B_ABST