公开(公告)号：US20140119998A1

公开(公告)日：2014-05-01

申请号：US14139627

申请日：2013-12-23

Applicant: A.L.M.T. Corp. ,  Sumitomo Electric Industries, Ltd. ,  Sumitomo Electric Hardmetal Corp.

Inventor： Yoshiharu Yamamoto ,  Kazuo Sasaya ,  Takayuki Fudo ,  Akira Nakano ,  Syunsuke Yamanaka ,  Takahisa Iguchi ,  Fumiatsu Sato ,  Akihiko Ikegaya

IPC: C22B34/36

CPC classification number: C22B34/36 ,  B01J8/10 ,  B01J19/28 ,  B01J2219/0004 ,  B01J2219/00132 ,  B01J2219/00157 ,  C01G23/005 ,  C01G35/00 ,  C01G37/02 ,  C01G37/14 ,  C01G41/00 ,  C01G41/003 ,  C01G41/02 ,  C01G51/42 ,  C01G53/42 ,  C01P2002/72 ,  C22B7/001 ,  C22B7/006 ,  Y02P10/214 ,  Y02P10/234 ,  Y02W30/54

Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

公开(公告)号：US09249479B2

公开(公告)日：2016-02-02

申请号：US14139598

申请日：2013-12-23

Applicant: A.L.M.T. Corp. ,  Sumitomo Electric Hardmetal Corp. ,  Sumitomo Electric Industries, Ltd.

Inventor： Yoshiharu Yamamoto ,  Kazuo Sasaya ,  Takayuki Fudo ,  Akira Nakano ,  Syunsuke Yamanaka ,  Takahisa Iguchi ,  Fumiatsu Sato ,  Akihiko Ikegaya

IPC: C22B34/36 ,  C01G41/00 ,  C01G41/02 ,  C22B7/00 ,  B01J8/10 ,  C01G23/00 ,  C01G35/00 ,  C01G37/02 ,  C01G53/00 ,  C01G37/14 ,  C01G51/00

CPC classification number: C22B34/36 ,  B01J8/10 ,  B01J19/28 ,  B01J2219/0004 ,  B01J2219/00132 ,  B01J2219/00157 ,  C01G23/005 ,  C01G35/00 ,  C01G37/02 ,  C01G37/14 ,  C01G41/00 ,  C01G41/003 ,  C01G41/02 ,  C01G51/42 ,  C01G53/42 ,  C01P2002/72 ,  C22B7/001 ,  C22B7/006 ,  Y02P10/214 ,  Y02P10/234 ,  Y02W30/54

Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

Abstract translation: 提供一种通过供给由硝酸钠或亚硝酸钠制成的氧化剂以使含钨材料和氧化剂在含氧气氛中相互接触从而连续产生反应产物来生产钨酸钠的方法; 采用该方法收集钨的方法; 以及生产钨酸钠的装置。 还提供了一种生产钨酸钠水溶液的方法，其中将还原剂引入含有上述反应产物的熔体中，然后溶解在水中; 以及使用该方法收集钨的方法。

公开(公告)号：US11293082B2

公开(公告)日：2022-04-05

申请号：US16762903

申请日：2018-11-13

Applicant: A.L.M.T. Corp.

Inventor： Takayuki Fudo ,  Kazuo Sasaya ,  Takehiko Hayashi

IPC: C22C29/08 ,  C01B32/949 ,  C22C1/05 ,  B22F1/00

Abstract: A powder containing tungsten carbide has an Fsss particle size of greater than or equal to 0.3 μm and less than or equal to 1.5 μm, and a content rate of the tungsten carbide of greater than or equal to 90% by mass. The powder has a crystallite size (average particle diameter) Y satisfying a relational expression of Y≤0.1×X+0.20 (X: the Fsss particle size of the power containing tungsten carbide).

公开(公告)号：US09512504B2

公开(公告)日：2016-12-06

申请号：US14139627

申请日：2013-12-23

Applicant: A.L.M.T. Corp. ,  Sumitomo Electric Hardmetal Corp. ,  Sumitomo Electric Industries, Ltd.

Inventor： Yoshiharu Yamamoto ,  Kazuo Sasaya ,  Takayuki Fudo ,  Akira Nakano ,  Syunsuke Yamanaka ,  Takahisa Iguchi ,  Fumiatsu Sato ,  Akihiko Ikegaya

IPC: C22B34/36 ,  B01J19/28 ,  B01J8/10 ,  C01G41/00 ,  C01G41/02 ,  C22B7/00 ,  C01G23/00 ,  C01G35/00 ,  C01G37/02 ,  C01G53/00 ,  C01G37/14 ,  C01G51/00

CPC classification number: C22B34/36 ,  B01J8/10 ,  B01J19/28 ,  B01J2219/0004 ,  B01J2219/00132 ,  B01J2219/00157 ,  C01G23/005 ,  C01G35/00 ,  C01G37/02 ,  C01G37/14 ,  C01G41/00 ,  C01G41/003 ,  C01G41/02 ,  C01G51/42 ,  C01G53/42 ,  C01P2002/72 ,  C22B7/001 ,  C22B7/006 ,  Y02P10/214 ,  Y02P10/234 ,  Y02W30/54

Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

公开(公告)号：US20140112847A1

公开(公告)日：2014-04-24

申请号：US14139598

申请日：2013-12-23

Applicant: A.L.M.T. Corp. ,  Sumitomo Electric Industries, Ltd. ,  Sumitomo Electric Hardmetal Corp.

Inventor： Yoshiharu Yamamoto ,  Kazuo Sasaya ,  Takayuki Fudo ,  Akira Nakano ,  Syunsuke Yamanaka ,  Takahisa Iguchi ,  Fumiatsu Sato ,  Akihiko Ikegaya

IPC: C22B34/36

CPC classification number: C22B34/36 ,  B01J8/10 ,  B01J19/28 ,  B01J2219/0004 ,  B01J2219/00132 ,  B01J2219/00157 ,  C01G23/005 ,  C01G35/00 ,  C01G37/02 ,  C01G37/14 ,  C01G41/00 ,  C01G41/003 ,  C01G41/02 ,  C01G51/42 ,  C01G53/42 ,  C01P2002/72 ,  C22B7/001 ,  C22B7/006 ,  Y02P10/214 ,  Y02P10/234 ,  Y02W30/54

Abstract: Provided are a method for producing sodium tungstate by supplying an oxidant made of sodium nitrate or sodium nitrite to bring a tungsten containing material and the oxidant into contact with each other in an atmosphere containing oxygen to thereby continuously produce a reaction product; a method for collecting tungsten using the method; and an apparatus for producing sodium tungstate. Also provided are a method for producing a sodium tungstate aqueous solution in which a reductant is introduced into a melt containing the above-described reaction product which is then dissolved in water; and a method for collecting tungsten using the method.

Abstract translation: 提供一种通过供给由硝酸钠或亚硝酸钠制成的氧化剂以使含钨材料和氧化剂在含氧气氛中相互接触从而连续产生反应产物来生产钨酸钠的方法; 采用该方法收集钨的方法; 以及生产钨酸钠的装置。 还提供了一种生产钨酸钠水溶液的方法，其中将还原剂引入含有上述反应产物的熔体中，然后溶解在水中; 以及使用该方法收集钨的方法。