FIELD: high purity hafnium production.
SUBSTANCE: invention relates to the production of high purity hafnium. Obtaining hafnium by iodide refining includes placing the feedstock in a shelf-type metal apparatus lined with molybdenum screens, placing iodine in an iodine supply device, vacuum degassing of the feedstock, and an iodide refining process using hafnium precipitation filaments. Iodide refining is carried out at the temperature of the outer wall of the shelf-type metal apparatus from 450 to 550°C and the specific consumption of iodine per 1 kg of feedstock from 7.0 to 11.5 g until the value of the current-to-voltage ratio is from 18 to 25.
EFFECT: method allows to reduce the specific consumption of iodine and increase the productivity of the hafnium iodide refining process due to the selected optimal parameters for this process, as a result of which the metal deposition rate increases.
1 cl, 1 tbl, 9 ex
| Title | Year | Author | Number |
|---|---|---|---|
| INSTRUMENT FOR IODIDE REFINED HAFNIUM | 2007 |
|
RU2353687C1 |
| METHOD OF IODIDE REFINING OF HAFNIUM | 2004 |
|
RU2291214C2 |
| APPARATUS FOR IODIDE REFINING OF ZIRCONIUM | 2003 |
|
RU2261287C2 |
| PROCESSING METHOD OF METALLIC CHIPS OF TITANIUM SUBGROUP AND ITS MELTS | 2007 |
|
RU2356962C2 |
| PROCESS FOR PREPARING HAFNIUM | 1989 |
|
RU2082793C1 |
| METHOD OF PRODUCTION OF HIGH PURITY TITANIUM FOR SPUTTERED TARGETS | 2008 |
|
RU2370559C1 |
| METHOD FOR PRODUCING HIGH-PURITY NIOBIUM INGOTS WITH NORMALIZED LEVEL OF ELECTROPHYSICAL PROPERTIES | 2003 |
|
RU2247164C2 |
| METHOD FOR PRODUCING LONG-LENGTH SEMI-FINISHED PRODUCTS FROM TiNiHf ALLOYS WITH HIGH-TEMPERATURE SHAPE MEMORY EFFECT | 2021 |
|
RU2771342C1 |
| METHOD FOR OBTAINING HAFNIUM INGOTS IN ELECTRON BEAM FURNACE | 2010 |
|
RU2443789C2 |
| METHOD FOR IODIDE REFINEMENT OF ZIRCONIUM AND APPARATUS THEREFOR | 2012 |
|
RU2532208C2 |
