EP0010106B1

EP0010106B1 - Guide troughs for molten products

Info

Publication number: EP0010106B1
Application number: EP79900133A
Authority: EP
Inventors: Tamino Okada; Toshiaki Sano
Original assignee: Nippon Crucible Co Ltd
Current assignee: Nippon Crucible Co Ltd
Priority date: 1978-01-26
Filing date: 1979-01-25
Publication date: 1982-02-17
Also published as: EP0010106A1; IT7919604A0; DE2934891A1; WO1979000550A1; EP0010106A4; JPS54112806U; CA1116849A; JPS5839354Y2; GB2036271A; IT1110427B; GB2036271B; IT7920604V0

Abstract

Guide troughs for leading molten products tapped from blast furnaces or electric furnaces or the like. A lengthy trough body (1), formed in one block with monolithic refractories, is provided with hook-engaging means in order for the body to be lifted and transported. The hook-engaging means comprises supporting pipes (2) which are laid longitudinally in the upper portion of the body on both sides thereof; supporting transverse members (3) which are disposed in an appropriately spaced-apart relationship to interconnect the supporting pipes on both sides of the trough body; and cut-out portions (4) provided in the trough body at suitable locations to expose the supporting pipes (2) to be engaged by hooks. The fact that the trough body has such stout supporting means and hook-engaging means which does not project from the upper surface of the trough body as the suspension plates in the conventional guide trough of this type, allows the following advantages to be obtained. Namely, the hook-engaging means is protected against radiant heat and splashing from high temperature molten products flowing through the trough. This greatly enhances safety during transportation. In addition, as there are no objects projecting from the upper surface of the trough body, the guide troughs can be stored by stacking. This permits a reduction in storage space.

Description

Field of the Invention

This invention relates to improvements in guide troughs to be used for conducting molten products from a melting furnace, such as a blast furnace and an electric furnace, and more particularly to a large size guide trough constructed in one block with monolithic refractory material.

Background of the Invention

In the recent tendency of the art, a long guide trough is constructed by stamping monolithic refractory material in one block instead of being constructed of brickwork, and transported and settled in the place where it is to be used. The method is also used for repairing the troughs, in which, when the inner surfaces of the troughs are worn by running molten products, the whole of the trough is replaced with a new one instead of repairing by lining the worn surfaces.
Such troughs are so heavy - some of them weigh about 1 ton or more - that the outside of the refractory body is reinforced by a supporting member, such as plates or frame works, which are usually provided with hook plates projecting upwards and having hook engaging holes for hanging the trough body, as shown in US-A-4 039 172.
As the hook plates are projecting upwards from the trough body, the hook plates are exposed to the heat radiation and splashes of the hot running molten products while in use, and this may weaken the hook plates and cause damages. Further, stacking of the troughs in a store is hindered by such projections.

Summary of the Invention

The guide trough of the present invention comprises a long trough body made of monolithic refractory material and provided with a runway for conduting molten products in the top surface; a supporting means for supporting said trough body; and a hook engaging means; characterised in that the supporting means comprises two holding beams embedded longitudinally in the upper portion of said body, one on each side thereof, said holding beams being connected by transverse supporting members disposed at intervals; and the hook engaging means is provided by removing a part of said trough body and exposing the holding beams for engaging hook means. Thus a strong and rigid supporting and hook engaging means may be provided, which hook engaging means does not project out from the trough body, so that it is not exposed to the heat radiation nor splashes of hot running molten products and the damage therefrom can be prevented absolutely. Also, the troughs may be stacked easily in a store.
The invention will be described in more detail with reference to the accompanying drawings.

Brief Description of the Drawing

Fig. 1 is a side view of a trough according to the present invention;
Fig. 2 is a cross-sectional view taken along line X-X of Fig. 1;
Fig. 3 is a top plan view of the trough in Fig.
Fig. 4 is a partial front view showing one example of hook means;
Fig. 5 is a side view of a trough of another embodiment of the present invention;
Fig. 6 is a cross-sectional view taken along line Y-Y of Fig. 5;
Fig. 7 is a top plan view of the trough in Fig. 5.

Description of the Preferred Embodiment

The trough shown in Fig. 1-Fig. 3 includes a long body 1 formed by stamping monolithic refractory material and provided with a runway for conducting molten products in the top surface.
The body 1 is reinforced by a couple of holding beams 2 of cylindrical form embedded at both side upper corners and extending longitudinally. The holding beams 2 are connected by U-shaped supporting cross members 3 disposed at intervals.
Hook engaging means 4 are provided at suitable portions of the body 1 by removing a part of body 1 and exposing the holding beams 2 for engaging hook means.
The trough may be hung by engaging the hook 6 of the hanging members 5 such as shown in Fig. 4 with a portion of the holding beam 2 in the hook engaging means 4, and thus the trough can be transported.
The hook'engaging means 4 do not project from the body 1 so that the troughs can be stacked easily in the store. Further the hook engaging means 4 are not exposed to the heat radiation or splash of hot molten products running through the runway of body 1, so that damage to the hook engaging means can be prevented.
Pipes, flat or angle bars may be used for the holding beams 2. Also connecting members 7 may be used for connecting and securing supporting cross members 3 at the bottom of the body 1 as shown in Fig. 3.
Fig. 5-Fig. -7 shows a trough of another embodiment of the present invention, in which two flat bars 8 and 8' are used as a holding beam 2'.
Flat bars 8 and 8' are placed on either side of a reinforcing member such as wire netting 3', which is laid inside of the supporting cross members 3. Wire netting 3' is secured to the flat bars 8 and 8' with bolts 9, and supporting cross members 3 are welded to the outside bar 8.

Claims

A guide trough for molten products, comprising a long body (1) made of monolithic refractory material and provided with a runway for conducting molten products in the top surface thereof; a supporting means (2, 3) for supporting said body; and a hook engaging means; characterised in that the supporting means comprises two holding beams (2) embedded longitudinally in the upper portion of said body, one on each side thereof, said holding beams (2) being connected by transverse supporting members (3) disposed at intervals; and the hook engaging means is provided by removing a part of said body and exposing the holding beams for engaging hook means.