SU69604A1 - The method of producing alumina according to the Bayer method from calcite bauxite - Google Patents

The method of producing alumina according to the Bayer method from calcite bauxite

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Publication number
SU69604A1
SU69604A1 SU1924A SU349370A SU69604A1 SU 69604 A1 SU69604 A1 SU 69604A1 SU 1924 A SU1924 A SU 1924A SU 349370 A SU349370 A SU 349370A SU 69604 A1 SU69604 A1 SU 69604A1
Authority
SU
USSR - Soviet Union
Prior art keywords
bauxite
calcite
bayer
producing alumina
alumina according
Prior art date
Application number
SU1924A
Other languages
Russian (ru)
Inventor
С.И. Астановицкая
С.И. Астановицка
Б.А. Мазель
Original Assignee
С.И. Астановицкая
С.И. Астановицка
Б.А. Мазель
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by С.И. Астановицкая, С.И. Астановицка, Б.А. Мазель filed Critical С.И. Астановицкая
Priority to SU1924A priority Critical patent/SU69604A1/en
Application granted granted Critical
Publication of SU69604A1 publication Critical patent/SU69604A1/en

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  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Description

Вредное вли ние карбонатов (кальцитов ), содержащихс  в некоторых бокситах, на технологию производства глинозема по способу Байера достаточно известно.The harmful effect of carbonates (calcites) contained in some bauxites on alumina production technology according to the Bayer method is well known.

В обычных услови х проведени  процесса Вайера содержащиес  в бокситах карбонаты декаустифицируют в сфере выщелачивани  соответствующую часть оборотной каустической щелочи. Это вызывает необходимость усложн ть технологический процесс дополнительными операци ми выделени  карбонатной щелочи, отделени  ее от раствора и каустификации дл  превращени  ее в едкую щелочь. Последн   операци  осуществл етс  либо известковой каустификацией , либо спеканием карбонатной щелочи с бокситом (комбинированна  схелш способа Байера - спекание).Under the usual conditions of the Viere process, the carbonates contained in the bauxite are decaused in the leaching field the corresponding part of the circulating caustic alkali. This makes it necessary to complicate the process by additional steps of extracting carbonate alkali, separating it from the solution, and causticizing to turn it into a caustic alkali. The latter operation is carried out either by calcareous causticization or by sintering carbonate alkali with bauxite (Bayer's combined method — sintering).

С целью устранени  возможности протекани  процесса декаустификации при переработке бокситов, содержащих карбонаты, предлагаетс  дл  выщелачивани  этих бокситовIn order to eliminate the possibility of a decoupling process during the processing of bauxites containing carbonates, it is proposed to leach these bauxites.

примен ть оборотные растворы, концентраци  карбонатной щелочи в которых должна отвечать так называемому «равновесию декаустификации. В таких растворах уже достигнут предел насыщени  содой ,в присутствии углекислого кальци  и поэтому последний оказываетс  фактически неспособным декаустифицировать едкую щелочь. Практически при выщелачивании по способу Вайера кальцитовых бокситов, согласно насто щему предложению, требуетс  применение значительно менее концентрированных , чем обычно, оборотных растворов (пор дка 100 г/л каустической щелочи).apply circulating solutions, the concentration of carbonate alkali in which should correspond to the so-called "equilibrium decoupling. In such solutions, the saturation limit of soda has already been reached, in the presence of calcium carbonate, and therefore the latter is virtually incapable of decaucifying the caustic alkali. In practice, when leaching the calcite bauxite according to the Vier method, according to the present proposal, the use of much less concentrated than usual circulating solutions (about 100 g / l caustic alkali) is required.

В частности тихвинские бокситы благодар  своему бемитовому и белштогидроргелитовому характеру сравнительно легко вскрываютс  и дают нормальное извлечение глинозема, даже при указанных выше низких концентраци х щелочи в оборотном растворе в услови х сравнительно умеренных температур (205-215°) и небольшой продолжительности (пор дка 1 часа).In particular, the Tikhvin bauxites due to their boehmite and belshtohydrogelgelite character are relatively easy to break open and give normal extraction of alumina, even at the above low concentrations of alkali in the working solution under conditions of relatively moderate temperatures (205-215 °) and short duration (about 1 hour ).

5757

№ 69604- 2 -No. 69604-2 -

Предмет изобретени стификации оборотной каустическойThe subject of invention is the reversal of caustic

щелочи в процессе выщелачивани  alkalis in the leaching process

Способ получени  глинозема по ме-последнее производ т при помощиThe method of producing alumina at least I last is produced using

тоду Байера из кальцитовых бокси-оборотных растворов, в которых ужеBayer’s method for calcite boxy-circulating solutions in which

тов, отличающийс  тем, чтодостигнут предел насыщени  содой вcharacterized in that the saturation limit is reached by soda in

с целью устранени   влени  декау-присутствии углекислого кальци .in order to eliminate the occurrence of the deca-presence of calcium carbonate.

SU1924A 1946-07-29 1946-07-29 The method of producing alumina according to the Bayer method from calcite bauxite SU69604A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1924A SU69604A1 (en) 1946-07-29 1946-07-29 The method of producing alumina according to the Bayer method from calcite bauxite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1924A SU69604A1 (en) 1946-07-29 1946-07-29 The method of producing alumina according to the Bayer method from calcite bauxite

Publications (1)

Publication Number Publication Date
SU69604A1 true SU69604A1 (en) 1946-11-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
SU1924A SU69604A1 (en) 1946-07-29 1946-07-29 The method of producing alumina according to the Bayer method from calcite bauxite

Country Status (1)

Country Link
SU (1) SU69604A1 (en)

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