Cold crucible comprising metal oxide barrier and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-2019331422-A1
Application number	US-201716462189-A
Country	US
Kind code	A1
Filing date	Nov 20, 2017
Priority date	Nov 25, 2016
Publication date	Oct 31, 2019
Grant date	—

Abstract

A metal oxide barrier and a connecting method for solving the problems in which sectors of an existing cold crucible are connected by means of a mica plate and the mica plate is damaged due to arcing and the like and in which the sectors are strongly connected by means of the mica plate and thus are difficult to replace and maintain. A cold crucible, comprising a metal oxide barrier, according to the present invention can prevent arcing, enables reduction of damage on the edge part of a water cooling sector due to a molten material and thus enhances durability. Moreover, the metal oxide barrier can easily be replaced compared to an existing mica plate and thus enables easy maintenance and repair.

First claim

1 . A cold crucible induction melter comprising a barrier disposed between a first water cooling sector for forming a melting space in a cold crucible of a vitrification equipment and a second water cooling sector adjacent thereto, wherein:
the barrier has a T-shaped horizontal cross-section, in which the T-shaped plate portion is directed to the inside of the melting space, and the T-shaped tip portion is coupled by insertion between the water cooling sectors, and a material comprises metal oxide.

2 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 1 , wherein the material of the metal oxide barrier comprises at least one selected from Al 2 O 3 and ZrO 2 .

3 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 1 , further comprising a mica plate disposed between the first water cooling sector and the second water cooling sector.

4 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 3 , wherein the mica plate is disposed in a space between the first water cooling sector and the second water cooling sector, from an end of the metal oxide barrier to an outer end between the water cooling sectors and is attached to the adjacent water cooling sectors.

5 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 3 , wherein the mica plate has a thickness of 0.1 mm to 1 mm, which is the same as or thicker than that of the tip portion of the metal oxide barrier.

6 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 1 , further comprising an inorganic adhesive layer between the metal oxide barrier and the water cooling sectors.

7 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 1 , wherein a cooling water pathway is formed inside of the water cooling sectors.

8 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 1 , wherein in the metal oxide barrier, the width (w) of the plate portion is in a range of 0.2 mm to 40 mm and the thickness (t2) of the plate portion is in a range of 0.1 mm to 5 mm.

9 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 1 , wherein in the metal oxide barrier, the thickness (t1) of the tip portion is in a range of 0.1 mm to 1 mm and the length (h) of the tip portion is in a range of 0.1 mm to 20 mm.

10 . The cold crucible induction melter comprising a metal oxide barrier disposed between the water cooling sectors of claim 1 , wherein the horizontal cross-section of a corner portion, where the tip portion and the plate portion of the metal oxide barrier meet with each other, is in an outer arc shape having a radius of curvature in a range of 0.1 mm to 10 mm.

11 . A method for coupling a metal oxide barrier between water cooling sectors, comprising:
preparing water cooling sectors of a first water cooling sector and a second water cooling sector; attaching a mica plate to an outer part of the space between the first water cooling sector and the second water cooling sector with the mica plate disposed therebetween; and inserting a barrier, in which a tip portion of a T-shaped metal oxide barrier is inserted into an inner part of the space between the first water cooling sector and the second water cooling sector.

12 . The method for coupling a metal oxide barrier between water cooling sectors, further comprising a step of applying an adhesive, in which an inorganic adhesive is applied to a tip portion of an oxide barrier and at least one selected from the inner parts of the space between the first water cooling sector and the second water cooling sector.

Assignees

• Korea Hydro & Nuclear Power Co

Inventors

• Hwang Young Hwan
• Hwang Seok Ju
• Kim Cheon Woo

Classifications

• H05B6/24

  Crucible furnaces (H05B6/30 takes precedence) · CPC title

• C03B5/43

  Use of materials for furnace walls, e.g. fire-bricks · CPC title

• C03B5/021

  by induction heating · CPC title

• F27D2001/0046

  Means to facilitate repair or replacement or prevent quick wearing · CPC title

• F27B14/061

  Induction furnaces · CPC title