FIELD: technological processes.
SUBSTANCE: invention can be used in preparation of beryllium hydroxide used in production of metallic beryllium, copper-beryllium ligature, ceramics from beryllium oxide and beryllium salts. Method for obtaining beryllium hydroxide from beryllium-containing concentrates comprises action of a concentrated sodium hydroxide solution, separation of the solution from the cake, and purification of the solution from iron and manganese. Then hydrolysis of sodium beryllate is carried out to produce beryllium hydroxide. Mother solutions are strengthened after hydrolysis by addition of solid sodium hydroxide. Electrochemical neutralization of excess alkali with an initial concentration of 450 g/dm3 are carried out in one step to the stability limit of sodium beryllate solution in the alkali concentration range of 100–70 g/dm3 followed by hydrolysis of the sodium beryllate solution. Alkaline solution is purified from iron and manganese impurities before it enters the electrodialyzer by feeding oxygen into the slurry pulp obtained after autoclave opening, followed by phase separation by filtration.
EFFECT: invention provides simplified technology for processing beryllium-containing concentrates by reducing the number of operations, simplifying the instrument scheme, increasing productivity of the process for obtaining beryllium hydroxide.
3 cl, 3 dwg, 3 tbl, 2 ex
Title | Year | Author | Number |
---|---|---|---|
METHOD OF OBTAINING BERYLLIUM HYDROXIDE FROM BERYLLIUM-CONTAINING CONCENTRATES | 2015 |
|
RU2598444C1 |
METHOD OF PRODUCTION OF BERYLLIUM HYDROXIDE | 2004 |
|
RU2264986C1 |
METHOD OF PROCESSING BERYLLIUM-CONTAINING CONCENTRATES | 2006 |
|
RU2309122C2 |
EXTRACTION METHOD OF BERYLLIUM FROM BERYLLIUM-BEARING SPODUMENE CONCENTRATE | 2008 |
|
RU2356963C2 |
METHOD OF REPROCESSING OF THE METALLIC BERYLLIUM WASTES | 2006 |
|
RU2315714C1 |
METHOD OF PROCESSING BERYLLIUM METAL WASTES | 2012 |
|
RU2492144C1 |
METHOD OF EXTRACTING BERYLLIUM BY ION EXCHANGE | 2014 |
|
RU2571763C1 |
METHOD OF BERYLLIUM RECOVERY FROM BERYLLIUM CONCENTRATES | 2008 |
|
RU2350562C2 |
METHOD OF BERTRANDITE-PHENACITE-FLUORITE CONCENTRATE PROCESSING | 2006 |
|
RU2324653C2 |
BERYLLIUM RAW MATERIAL REPROCESSING METHOD | 1991 |
|
RU2040567C1 |
Authors
Dates
2018-10-04—Published
2017-03-03—Filed