RU2008137060A

RU2008137060A - METHOD FOR PRODUCING LITHIUM PRODUCTS IN COMPLEX PROCESSING OF SPODUMEN ORES

Info

Publication number: RU2008137060A
Application number: RU2008137060/02A
Authority: RU
Inventors: Наталья Павловна Коцупало (RU); Наталья Павловна Коцупало; Николай Захарович Ляхов (RU); Николай Захарович Ляхов; Мирон Аркадьевич Ягольницер (RU); Мирон Аркадьевич Ягольницер; Александр Дмитриевич Рябцев (RU); Александр Дмитриевич Рябцев
Priority date: 2008-09-15
Filing date: 2008-09-15
Publication date: 2010-03-20
Also published as: RU2390571C1

Abstract

1. Способ получения литиевых продуктов при комплексной переработке сподуменовых руд, включающий получение моногидрата гидроксида лития и обжиг сырьевой смеси с известняком, отличающийся тем, что сырьевая смесь состоит из необогащенной сподуменовой руды и известняка при мол. отн. CaO:SiO2, равном 2,0-2,2 и соды при мол. отн. Na2O:Al2O3=1, обжиг смеси проводят при температуре 1200-1250°С; выщелачивание смеси осуществляют раствором гидроксида натрия, образовавшийся раствор алюминатов щелочных металлов и гидроксида лития подвергают декомпозиции диоксидом углерода с выделением в осадок карбонатной разновидности двойного гидроксида алюминия, лития с последующим получением литиевых продуктов: моногидрата гидроксида лития путем каустификации осадка известью (известковым молоком) и получением раствора гидроксида лития и осадка трехкальциевого гидроалюмината и/или смеси безводных алюминатов лития путем прокаливания карбонатной разновидности двойного гидроксида алюминия лития при температуре 600-800°С; в сырьевую смесь из шлама и трехкальциевого гидроалюмината, образующихся на I стадии, дозируют известь (известняк) до мол. отн. CaO:SiO2, равного, 2,6-3,0, а термическую обработку (обжиг) сырьевой смеси проводят при температуре 600-1400°С. ! 2. Способ по п.1, отличающийся тем, что сырьевую смесь содержащую шлам и трехкальциевый гидроалюминат подвергают термической обработке при 600±50°С и совместному помолу с известью с получением шлакоцемента. ! 3. Способ по п.1, отличающийся тем, сырьевую смесь, содержащую шлам, трехкальциевый гидроалюминат и известняк подвергают обжигу при 1300-1400°С с получением портландцемента; ! 4. Способ по п.1, отличающийся тем, ч�1. A method of obtaining lithium products in the integrated processing of spodumene ores, including obtaining monohydrate of lithium hydroxide and roasting a raw mixture with limestone, characterized in that the raw mixture consists of unrefined spodumene ore and limestone at a pier. rel. CaO: SiO2 equal to 2.0-2.2 and soda at mol. rel. Na2O: Al2O3 = 1, the mixture is fired at a temperature of 1200-1250 ° C; leaching of the mixture is carried out with a solution of sodium hydroxide, the resulting solution of aluminates of alkali metals and lithium hydroxide is subjected to decomposition with carbon dioxide with the precipitation of a carbonate variety of double aluminum hydroxide, lithium, followed by obtaining lithium products: lithium hydroxide monohydrate by causticizing the precipitate with lime (milk of lime) and obtaining a solution lithium hydroxide and a precipitate of tricalcium hydroaluminate and / or a mixture of anhydrous lithium aluminates by calcining the carbonate variety of double lithium aluminum hydroxide at a temperature of 600-800 ° C; in the raw mixture of sludge and tricalcium hydroaluminate formed in stage I, lime (limestone) is dosed to a mol. rel. CaO: SiO2 equal to 2.6-3.0, and heat treatment (roasting) of the raw mixture is carried out at a temperature of 600-1400 ° C. ! 2. The method according to claim 1, characterized in that the raw mixture containing sludge and tricalcium hydroaluminate is subjected to heat treatment at 600 ± 50 ° C and joint grinding with lime to obtain slag cement. ! 3. The method according to claim 1, characterized in that the raw mixture containing slurry, tricalcium hydroaluminate and limestone is subjected to roasting at 1300-1400 ° C to obtain Portland cement; ! 4. The method according to claim 1, characterized in that

Claims

1. The method of producing lithium products in the complex processing of spodumene ores, including the production of lithium hydroxide monohydrate and firing the raw mix with limestone, characterized in that the raw mix consists of unenriched spodumene ore and limestone at mol. rel. CaO: SiO ₂ equal to 2.0-2.2 and soda at mol. rel. Na ₂ O: Al ₂ O ₃ = 1, the mixture is fired at a temperature of 1200-1250 ° C; the mixture is leached with a sodium hydroxide solution, the resulting solution of alkali metal aluminates and lithium hydroxide is decomposed with carbon dioxide to precipitate a carbonate variety of double aluminum hydroxide, lithium, followed by lithium products: lithium hydroxide monohydrate by causticizing the precipitate with lime (milk of lime) and obtaining a solution lithium hydroxide and a precipitate of tricalcium hydroaluminate and / or a mixture of anhydrous lithium aluminates by calcining car a bonate variety of double lithium aluminum hydroxide at a temperature of 600-800 ° C; in the raw mix of sludge and tricalcium hydroaluminate formed in stage I, lime (limestone) is dosed to mol. rel. CaO: SiO ₂ equal to 2.6-3.0, and heat treatment (firing) of the raw material mixture is carried out at a temperature of 600-1400 ° C.

2. The method according to claim 1, characterized in that the raw material mixture containing sludge and tricalcium hydroaluminate is subjected to heat treatment at 600 ± 50 ° C and co-grinding with lime to obtain slag cement.

3. The method according to claim 1, characterized in that the raw material mixture containing sludge, tricalcium hydroaluminate and limestone are calcined at 1300-1400 ° C to obtain Portland cement;

4. The method according to claim 1, characterized in that the decomposition of the aluminate solution containing lithium hydroxide is carried out using the exhaust gases of sintering furnaces.