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Comprehensive utilization method of ammonia-nitrogen-containing manganese slag
The invention discloses a resource comprehensive utilization method of ammonia-nitrogen-containing manganese slag, wherein the method comprises the following steps: (1) mixing ammonia-nitrogen-containing manganese slag slurry, adding sodium carbonate to react, and filtering to obtain filtrate and filter residues; (2) putting the filtrate into a closed reactor, adding a sodium hydroxide solution to adjust the pH value to 11-12, and under the conditions of vacuum, heating and stirring, collecting the generated ammonia gas by an absorption liquid to obtain an absorbed liquid, and returning the absorbed liquid to the manganese electrolysis process; (3) removing ammonia gas from the filtrate to obtain deaminized residual liquid, returning to the step (1) and the step (2) for circular treatment to finally obtain deaminized concentrated liquid, and concentrating, cooling and crystallizing the deaminized concentrated liquid through a vacuum dryer to obtain crude mirabilite; and (4) carrying out magnetic separation on the filter residues to obtain manganese-rich ore and magnetic separation tailings. According to the method, the ammonia-nitrogen-containing manganese slag is subjected to the treatment, so that manganese in the slag is enriched, ammonia nitrogen returns to the manganese electrolysis process to be recycled, iron, silicon, aluminum and the like are used as clinker for firing aluminoferrite cement, and comprehensive recycling and utilization of all elements in the ammonia-nitrogen-containing manganese slag are achieved.
本发明公开了一种含氨氮锰渣的资源综合利用方法，包括如下步骤：(1)含氨氮锰渣调浆，然后加入碳酸钠反应，经过滤得到滤液和滤渣；(2)滤液置于密闭反应器中，加入氢氧化钠溶液调节pH值为11～12，在真空、加热和搅拌条件下，产生的氨气经吸收液收集后得到的吸收后液返回锰电解工序；(3)滤液脱除氨气后得到脱氨残液，返回步骤(1)和步骤(2)循环处理，最终得到脱氨浓液，经真空干燥器浓缩、冷却、结晶得到粗芒硝；(4)滤渣经磁选得到富锰矿料和磁选尾料。本发明对含氨氮锰渣进行上述处理使得渣中的锰得到富集，氨氮返回锰电解工序回收利用，铁硅铝等则用作烧制铁铝酸盐水泥熟料，实现了含氨氮锰渣中各元素的综合回收与利用。
Comprehensive utilization method of ammonia-nitrogen-containing manganese slag
The invention discloses a resource comprehensive utilization method of ammonia-nitrogen-containing manganese slag, wherein the method comprises the following steps: (1) mixing ammonia-nitrogen-containing manganese slag slurry, adding sodium carbonate to react, and filtering to obtain filtrate and filter residues; (2) putting the filtrate into a closed reactor, adding a sodium hydroxide solution to adjust the pH value to 11-12, and under the conditions of vacuum, heating and stirring, collecting the generated ammonia gas by an absorption liquid to obtain an absorbed liquid, and returning the absorbed liquid to the manganese electrolysis process; (3) removing ammonia gas from the filtrate to obtain deaminized residual liquid, returning to the step (1) and the step (2) for circular treatment to finally obtain deaminized concentrated liquid, and concentrating, cooling and crystallizing the deaminized concentrated liquid through a vacuum dryer to obtain crude mirabilite; and (4) carrying out magnetic separation on the filter residues to obtain manganese-rich ore and magnetic separation tailings. According to the method, the ammonia-nitrogen-containing manganese slag is subjected to the treatment, so that manganese in the slag is enriched, ammonia nitrogen returns to the manganese electrolysis process to be recycled, iron, silicon, aluminum and the like are used as clinker for firing aluminoferrite cement, and comprehensive recycling and utilization of all elements in the ammonia-nitrogen-containing manganese slag are achieved.
本发明公开了一种含氨氮锰渣的资源综合利用方法，包括如下步骤：(1)含氨氮锰渣调浆，然后加入碳酸钠反应，经过滤得到滤液和滤渣；(2)滤液置于密闭反应器中，加入氢氧化钠溶液调节pH值为11～12，在真空、加热和搅拌条件下，产生的氨气经吸收液收集后得到的吸收后液返回锰电解工序；(3)滤液脱除氨气后得到脱氨残液，返回步骤(1)和步骤(2)循环处理，最终得到脱氨浓液，经真空干燥器浓缩、冷却、结晶得到粗芒硝；(4)滤渣经磁选得到富锰矿料和磁选尾料。本发明对含氨氮锰渣进行上述处理使得渣中的锰得到富集，氨氮返回锰电解工序回收利用，铁硅铝等则用作烧制铁铝酸盐水泥熟料，实现了含氨氮锰渣中各元素的综合回收与利用。
Comprehensive utilization method of ammonia-nitrogen-containing manganese slag
一种含氨氮锰渣的综合利用方法
JIANG GUOMIN (author) / YAN GUOMENG (author) / GAO WEIRONG (author) / WANG KEYONG (author) / WANG HAO (author) / LIU YONGFENG (author) / MENG YUN (author)
2021-04-30
Patent
Electronic Resource
Chinese
IPC:
C01D
Verbindungen der Alkalimetalle, d.h. des Lithiums, Natriums, Kaliums, Rubidiums, Cäsiums oder Franciums
,
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
/
B03C
Magnetische oder elektrostatische Trennung fester Stoffe von festen Stoffen oder flüssigen oder gasförmigen Medien
,
MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS
/
C01C
Ammoniak
,
AMMONIA
/
C04B
Kalk
,
LIME
/
C22B
PRODUCTION OR REFINING OF METALS
,
Gewinnen oder Feinen von Metallen
/
C25C
Verfahren für die elektrolytische Herstellung, Wiedergewinnung oder Raffination von Metallen
,
PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS
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