一种高效硫酸盐矿物氨化湿法反应系统
By combining pre-ammoniation treatment with an airlift circulating reactor, the problems of long decomposition time and high energy consumption of sulfate minerals have been solved, achieving low-temperature and high-efficiency decomposition, generating high-value-added products, improving reaction rate and conversion rate, reducing energy consumption, and realizing the high-value utilization of industrial solid waste and the disposal of carbon dioxide.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU JINCHANGMIN ENVIRONMENTAL PROTECTION TECH CO LTD
- Filing Date
- 2025-07-25
- Publication Date
- 2026-07-17
AI Technical Summary
The existing sulfate mineral decomposition process is time-consuming, energy-intensive, and difficult, resulting in uncontrollable production costs and uneconomical products, which seriously restricts the development of the industry.
By employing a pre-ammoniation treatment device and an airlift circulating reactor, the special physical and chemical properties of ammonia are utilized to decompose sulfate minerals under low-temperature conditions. The pre-ammoniation treatment shortens the main reaction time, neutralizes the acidity of impurities, and improves the crystal morphology and slurry uniformity. Combined with the airlift circulating reactor, the gas-liquid-solid mass transfer is enhanced, the reaction temperature is controlled, and the closed-loop utilization of gas and slurry is achieved.
This technology enables the efficient decomposition of sulfate minerals at low temperatures, generating high-value-added products such as ammonium sulfate and calcium carbonate. It significantly improves reaction rate and conversion rate, reduces energy consumption, minimizes side reactions, enhances product purity and yield, realizes the high-value utilization of industrial solid waste, and eliminates carbon dioxide.
Smart Images
Figure CN224507046U_ABST
Abstract
Claims
1. A high efficiency sulphate mineral ammoniating hydrometallurgical reaction system characterized by, It includes a pre-ammoniation treatment unit, an airlift circulating reactor, and a discharge pump (22), wherein: The pre-ammoniation treatment device is used to introduce sulfate minerals and ammonia water for a preliminary reaction, and then add water or ammonium sulfate mother liquor to mix and form a slurry, which is then introduced into the airlift circulation reaction device. The airlift circulation reactor is used to introduce carbon dioxide and ammonia gas to mix with the slurry and undergo a gas-liquid-solid three-phase reaction. After continuous airlift circulation, the target product is obtained and then pumped out by the discharge pump (22). The airlift circulation reactor includes a shell (3), a central guide cylinder (1) and a downcomer (2) set in the shell, as well as a slurry collection hopper (4), an ammonia pump (19) and a carbon dioxide pump (13). The central guide cylinder (1) is connected to the pre-ammoniation treatment device and serves as the rising zone. The downcomer (2) is located in the center. Outside the guide tube (1), there is a descending zone; the slurry collection hopper (4) is located at the bottom of the central guide tube (1) and the downcomer (2), forming a circulation channel with the central guide tube and the downcomer. A microporous gas distributor (12) is provided inside the slurry collection hopper (4) directly below the central guide tube; the ammonia pump (19) is used to pump ammonia into the central guide tube (1); the carbon dioxide pump (13) is used to pressurize and pump carbon dioxide into the slurry collection hopper, and after being acted upon by the microporous gas distributor, it is sprayed into the central guide tube at high speed to provide circulation driving force.
2. The high-efficiency sulfate mineral ammoniation wet reaction system according to claim 1, characterized in that, The pre-ammoniation treatment device includes a pre-ammoniation reaction tank (14) for introducing sulfate minerals and ammonia water for pre-ammoniation, a ball mill (15) connected to the pre-ammoniation reaction tank (14) for grinding the pre-ammoniation material, and a buffer tank (18) connected to both the ball mill (15) and the central guide tube (1) for adding water or ammonium sulfate mother liquor to mix with the grinding material to form a slurry.
3. The high-efficiency sulfate mineral ammoniation wet reaction system according to claim 2, characterized in that, The central guide tube (1) is equipped with an inclined blade turbine agitator (10); the slurry collection hopper (4) is equipped with a radial flow turbine agitator (11).
4. The high-efficiency sulfate mineral ammoniation wet reaction system according to claim 3, characterized in that, It also includes a tail gas recovery and separation system for recovering and recirculating excess carbon dioxide and ammonia discharged from the airlift recirculation reactor into the airlift recirculation reactor.
5. The efficient wet reaction system for ammoniation of sulfate minerals according to claim 4, characterized in that, The exhaust gas recovery and separation system includes an exhaust fan (20) connected to the upper part of the housing (3) and an exhaust gas recovery and treatment device (21) connected to the exhaust fan (20) for separating carbon dioxide and ammonia. The carbon dioxide separated by the exhaust gas recovery and treatment device is re-entered into the air rise circulation reactor via a carbon dioxide pump (13). The ammonia separated by the exhaust gas recovery and treatment device is re-entered into the air rise circulation reactor via an ammonia pump (19).
6. The high-efficiency sulfate mineral ammoniation wet process reaction system according to any one of claims 2-5, characterized in that, It also includes a slurry external circulation system, which is used to pump out part of the slurry in the downcomer (2), cool it down and mix it with carbon dioxide, and then transport it to the central guide tube (1).
7. The high-efficiency sulfate mineral ammoniation wet reaction system according to claim 6, characterized in that, The external circulation system of the slurry includes a slurry pump (5), a heat exchanger (6), a Venturi ejector (7) and a spiral static mixer (17) connected in sequence; the pump inlet of the slurry pump (5) is connected to the downcomer (2); the discharge port of the spiral static mixer (17) is connected to the central guide tube (1).
8. The high-efficiency sulfate mineral ammoniation wet reaction system according to claim 7, characterized in that, The heat exchanger (6) is also connected to the pre-ammoniation reaction tank (14) to provide a heat source to the pre-ammoniation reaction tank and receive a cold source from the pre-ammoniation reaction tank to complete the heat exchange work.
9. The high-efficiency sulfate mineral ammoniating wet reaction system according to claim 7 or 8, characterized in that, The outlet of the spiral static mixer (17) is connected to the central guide tube (1) through the first annular component (8).
10. The high efficiency sulphate mineral ammoniating wet reaction system according to claim 9, characterized in that, The pump outlet of the ammonia pump (19) is connected to the central guide tube (1) through the second annular component (9).