Awọn ọna akọkọ fun iṣelọpọ ti Lulú Tungsten

Tungsten lulú jẹ ohun elo aise akọkọ fun iṣelọpọ tungsten carbide, tungsten mimọ, awọn ohun elo tungsten ati awọn ọja tungsten miiran, pẹlu ju 70% ti lulú tungsten ti a lo ni iṣelọpọ tungsten carbide. Lọwọlọwọ, awọn ọna akọkọ fun gbigba lulú tungsten ni:

Ọna idinku hydrogen ti tungsten oxide

Eyi jẹ ọna ti idinku tungsten oxide si tungsten lulú nipa lilo H2 bi oluranlowo idinku. Gbigba idinku hydrogen ti WO₃ gẹgẹbi apẹẹrẹ, iṣesi gbogbogbo jẹ:

WO₃+3H₂=W+3H₂O

Lọwọlọwọ, awọn tungsten oxides ti a lo bi awọn ohun elo aise fun idinku hydrogen ni akọkọ pẹlu tungsten trioxide ofeefee (WO₃), tungsten oxide buluu (paapaa WO₂.₉), ati eleyi ti tungsten oxide (WO₂.₇₂), bbl Ọna idinku hydrogen ti tungsten oxide jẹ ọna akọkọ fun iṣelọpọ tungsten oxide lọwọlọwọ.

2. Hydrogen idinku ti tungsten halides

Eyi jẹ ọna ti o nlo H2 gẹgẹbi oluranlowo idinku lati dinku awọn halides tungsten (gẹgẹbi tungsten chloride, tungsten fluoride) si tungsten ti fadaka. Fun apẹẹrẹ, ninu ọran idinku hydrogen ti WCl6, iṣesi gbogbogbo jẹ:

WCl6+3H₂=W+6HCI

Ilana idinku hydrogen ti tungsten halides jẹ ifasẹ-fase gaasi, ni pataki ti a lo ninu isọdi eeru kẹmika lati ṣe agbejade lulú tungsten ultrafine tabi awọn ibora tungsten. Lọwọlọwọ, ọna idinku chlorination ti tungsten halides jẹ lilo nikan fun iṣelọpọ iwọn kekere.

3. Erogba Idinku Ọna ti Tungsten Oxides

Nigbati adalu tungsten oxides ati erogba ti wa ni kikan si iwọn otutu kan, awọn oxides tungsten dinku si tungsten lulú. Gbigba idinku erogba ti WO₃ gẹgẹbi apẹẹrẹ, iṣesi gbogbogbo jẹ:

WO₃+3C=W+3CO

WO₃+3CO=W+3CO₂

Nigba miiran, iye kekere ti hydrogen ni a ṣe sinu ileru lati ṣe igbelaruge ilana idinku erogba. Sibẹsibẹ, lulú tungsten ti a ṣe nipasẹ ọna yii ni akoonu erogba ti o ga julọ ati pe ko dara fun awọn ọja tungsten. Lọwọlọwọ, ọna idinku erogba fun igbaradi tungsten lulú jẹ lilo diẹ sii, ṣugbọn o pọ si ni iṣelọpọ taara ti tungsten carbide, ni pataki ultrafine tungsten carbide powder ati tungsten carbide composite powder.

4. Awọn ọna miiran

Awọn ọna miiran fun iṣelọpọ tungsten onirin pẹlu itanna iyọ didà, idinku sinkii, ati idinku hydrogen pilasima, laarin awọn miiran.