JP2589796Y2 - Discharge pipe in metal melt filtration tank - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge pipe in a filtration tank for molten metal.

[0002]

2. Description of the Related Art Conventionally, a filtration chamber surrounded by a side wall and a bottom wall of a refractory having an open top surface and a number of filtration tubes between a tapping end plate and a counter-draining end plate housed in the filtration chamber. Are known, and a unit consisting of an inlet for the molten metal reaching the filtration chamber, and an outlet for taking out the purified molten metal filtered by the filtration tube is known, and constitutes the outlet of the known unit. As shown in FIG. 1, the discharge pipe in the portion from the inlet of the purified molten metal to the outlet of the purified molten metal at the boundary with the filtration chamber was formed of silicon nitride, silicon carbide refractory or alumina refractory. It was a refractory and was divided into an upper half a and a lower half b, which were connected by mortar and used. That is, in the example drawings of the publications, the discharge pipe is illustrated as an integral part from the inlet part to the outlet part, but it is not necessary to divide and write the drawing like an actual thing, It is merely illustrated as an object, and the actual one is formed by dividing into an upper half a and a lower half b and joining them by mortar.

[0003]

However, even if the divided discharge pipes are joined by mortar, there is a problem that the molten metal leaks from the seam portion and turns to the back side, at which time impurities are mixed into the molten metal. .

[0004]

The object of the present invention is to provide a discharge pipe which is easy to handle, inexpensive, and prevents impurities from being mixed into the purified molten metal.

[0005]

According to the present invention, there is provided a filtration chamber 5 having an upper surface 2 which is open and the periphery of which is surrounded by a side wall 3 and a bottom wall 4 of a refractory, and a tap water accommodated in the filtration chamber 5. A filtration unit 6 in which a number of filtration tubes 11 are provided laterally between a side head plate 9 and a counter discharge side head plate 10, an inlet 7 for the molten metal reaching the filtration chamber 5, and a purified molten metal filtered by the filtration tubes 11. The discharge pipe 17 from the inlet section 15 to the outlet section 16 that constitutes from the filtration chamber 5 to the tap hole 8 is made of silicon nitride, silicon carbide refractory or alumina. The refractory 18 is made of a refractory, and any part thereof is a seamless integral body, and is a discharge pipe in a molten metal filtration tank formed in an independent structure.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of one embodiment of the present invention will be described with reference to the drawings. 1 is a filtration tank for filtering a molten metal such as aluminum, the upper surface 2 is open and the periphery is a side wall 3, a bottom wall 4, and a lid of a refractory. It is surrounded by a body (not shown). Reference numeral 5 denotes a filtration chamber formed in the filtration tank 1, and a filtration unit 6 is housed in the filtration chamber 5 from above using a lift. In the filtration tank 1, an inlet 7 for the molten metal reaching the filtration chamber 5 and an outlet 8 for extracting the molten metal selected from the filtration chamber 5 are formed.

The filtering unit 6 has a large number of ceramic filtration tubes 11 provided horizontally between a tapping side head plate 9 made of refractory material and a counter tapping side head plate 10. A wedge 12 is inserted between the head and the side wall 3, and the tapping side head plate 9 is pressed against the tapping side wall 14 via the packing 13, and the molten metal filtered by the filter tube 11 is taken out from the tap hole 8. The filtering unit 6 may be stored in the filtering chamber 5 only in one set or in a plurality of sets.

The present invention is directed to a discharge pipe 17 from the inlet 15 to the outlet 16 of the molten metal formed on the side wall 14 on the tapping side against which the packing 13 is pressed, which is based on silicon nitride, silicon carbide refractory or alumina. Because of the refractory material 18 made of refractory material, all parts are seamless and
And it was formed in an independent structure. In the figure, 19
Denotes a castable layer, and 20 denotes an outer plate formed of an iron plate.

[0009]

Next, the operation will be described. (General usage method) Before the molten metal is filled, the filtration unit 6 needs to be preheated,
Remove the lid, house the filtration unit 6 by the lift,
After opening the lid, boil it empty. When the preheating of the filtration unit 6 is completed, a molten metal of aluminum is supplied from the hot water inlet 7, and the molten metal filled in the filtration chamber 5 is filtered and purified by the filtration tube 11, and is taken out from the outlet 8.

(Operation of the Present Invention) The discharge pipe 17 of the present invention is a refractory 18 made of silicon nitride, silicon carbide refractory, or alumina refractory. Because it is formed
When forming the filtration tank 1, the discharge pipe 17 is fitted as it is, and the outer periphery thereof is surrounded and formed by the castable layer 19 and the iron plate 20. Then, since the discharge pipe 17 has no joint as in the related art, there is no leakage of the molten metal, and there is no problem that impurities are mixed into the purified water due to the leakage of the molten metal.

[0011]

The conventionally known discharge pipe is divided into upper and lower parts a and b as shown in FIG.
It was used by joining with mortar. Therefore, the molten metal leaks from the seam and turns to the back side, based on the molten metal leakage,
There was a problem that impurities were mixed in the purified water. However, in the present invention, the upper surface 2 is open and the surroundings are refractory side walls 3.
A filtration chamber 5 surrounded by a bottom wall 4 and a filtration unit 6 in which a number of filtration tubes 11 are laterally provided between a tapping-side end plate 9 and a counter-draining end plate 10 housed in the filtration chamber 5. An inlet 7 for the molten metal reaching the filtration chamber 5;
And a discharge port 8 for taking out the purified molten metal filtered by the filter, and a discharge pipe 17 from an inlet portion 15 to an outlet portion 16 that constitutes from the filtration chamber 5 to the discharge port 8,
Since the refractory 18 made of silicon nitride, silicon carbide refractory or alumina refractory is used to form a discharge pipe in a molten metal filtration tank formed as a single-piece seamless and independent structure. The handling of the pipe 17 is simple, the mounting work is also easy, and there is no seam, so that there is an effect that there is no problem of impurity mixing into the purified water due to molten metal leakage.

[Brief description of the drawings]

FIG. 1 is a view showing a known example of a discharge pipe.

FIG. 2 is a longitudinal sectional view of the entire filtration tank.

FIG. 3 is a vertical sectional side view of the discharge pipe of the present invention.

FIG. 4 is a plan view of the discharge pipe.

FIG. 5 is a right side view of the discharge pipe.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Filtration tank, 2 ... Top surface, 3 ... Side wall, 4 ... Bottom wall, 5 ... Filtration chamber, 6 ... Filtration unit, 7 ... Hot water outlet, 8 ... Hot water outlet, 9 ...
Tapping side head plate, 10: counter tapping side head plate, 11: filtration tube, 12: wedge, 13: packing, 14: side wall of tapping side,
Reference numeral 15: inlet portion, 16: outlet portion, 17: discharge pipe, 18: refractory, 19: castable tank, 20: outer plate of iron plate.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B22D 35/00 B22D 43/00 C22B 9/02

Claims (1)

(57) [Scope of request for utility model registration] 1. A filter chamber 5 which is open at an upper surface 2 and is surrounded by a side wall 3 and a bottom wall 4 of a refractory, and a tapping-side end plate 9 and a counter-tipping-side end plate 10 housed in the filtration chamber 5. A filtration unit 6 in which a number of filtration tubes 11 are horizontally disposed, an inlet 7 for the molten metal reaching the filtration chamber 5, and an outlet 8 for taking out the purified molten metal filtered by the filtration tubes 11. The discharge pipe 17 from the inlet section 15 to the outlet section 16 that constitutes from the filtration chamber 5 to the tap hole 8 is made of a refractory 18 of silicon nitride, silicon carbide, or alumina refractory. A discharge pipe in a metal melt filtration tank that is a seamless, integral and independent structure.