SU865522A1 - Crucible mould for conveying molten metal - Google Patents

Description

(54) LUGGING BUCKET FOR MELT TRANSPORTATION

I

The invention relates to non-ferrous metallurgy, in particular to the design of a ladle for transporting the melt in titanium and magnesium production.

Buckets are known for transporting the melt. These buckets have a bottom lateral discharge of the melt through a drain pipe with a locking device, their inner surface is lined with a heat insulating layer and a refractory brick 1.

However, in such buckets, in the event of a single lining or drain pipe failure, the entire lining of the bucket must be replaced. In addition, direct contact of the melt with the lining does not allow the use of a lighter, and hence porous, refractory material, which does not allow to reduce the total weight of the bucket and heat loss, as well as to increase its useful volume.

A crucible bucket for transporting the melt with a bottom side drain through a drain pipe with a stopping device is also known, consisting of a refractory-lined housing with electric heaters and a removable lined shell bottom. In the cavity of the casing

A removable metal crucible is installed with a side discharge pipe integrated in its bottom. The drain pipe consists of internal and external parts and is attached to the bucket casing by a flange connection. The bottom of the crucible is made obliquely with a slope towards the drain pipe 2. However, such a design of the inclined bottom of the crucible significantly reduces its useful volume, and the implementation of the drain pipe consisting of external and internal parts of different diameters does not ensure tightness when the melt is drained from the crucible. . In addition, joining them directly in the bucket casing cavity leads to melt leakage into the bucket cavity with formation of wall coverings and decommissioning of the casing lining,

15 moreover, in this case, the crucible cannot be removed from the ladle without completely cooling it and dismantling the bottom of the casing, followed by cleaning the crucible discharge pipe area from the wall. The presence of electric heaters requires autonomous power supply or

Claims (2)

20 stationary heating, which causes certain difficulties or unproductive idle times of the bucket, while a warm melt in a crucible with thermal insulation of the bucket shell does not cause a significant drop in the temperature of the melt, which makes it difficult to drain from the crucibles. The purpose of the invention is to simplify the design, increase the service life and increase labor productivity by improving the construction of a known crucible scoop. The goal is achieved by supplying the scoop with a removable lined insert that is rigidly attached to its casing, and the removable crucible is integral with the drain pipe. FIG. 1 shows a crucible ladle for transporting the melt, a general view; in fig. 2 is a section A-A in FIG. 1. The bucket consists of a casing 1 lined with refractory material 2, a removable metal crucible 3, an all-metal drain pipe 4, a lid 5 of the crucible lined with refractory material, a receiving trough 6 for pouring melt into the crucible ras-7U, a stopper 7 and a removable insert 8 lined with refractory material. The assembled crucible ladle for transporting the melt is mounted on an electric car and transported under the drain unit of the apparatus, in which the process of magnesium reduction of titanium tetrachloride is carried out. One of the products of the process is magnesium chloride, which must be periodically removed from the apparatus. The drainage apparatus of the apparatus is opened and the molten magnesium chloride melts the crucible 3 through the receiving chute 6 for pouring the melt. Upon filling the crucible with the melt, the ladle is transported on an electric car to the electrolysis bath of magnesium production, after which the locking device 7 is opened and the melt is drained from the crucible into the electrolyzer through the all-metal drain pipe 4. When the crucible of the bucket breaks down, the removable insert 8 is removed from the casing 1 of the crucible, the crucible is removed from the casing by an electric bridge crane and sent for repair, and instead of the extracted crucible a dry backup crucible is installed, the insert is mounted on the casing 1, the lid 5 with the receiver the chute 6 for pouring the melt and the carpet is put into operation. The presence of a removable lined insert in the casing of the bucket, as well as the complete execution of the drain pipe in the crucible, allows replacing the crucible on the bucket without completely removing it from work, which significantly reduces its repair period. Increasing the effective volume of the crucible by constructively changing its bottom from inclined to horizontal, and excluding electric heaters in the casing of the bucket with maintaining the required temperature of the melt in the crucible due to the heat content of the melt itself, increases its efficiency in operation. The use of these buckets can reduce operating costs by eliminating the electric heating of the crucibles in the casing of the bucket and more fully using the casing itself by replacing the faulty crucible in the bucket without taking it out of operation, as well as improving the performance of the furnace tube occupied with plums and transportation of magnesium chloride. A crucible scoop for transporting a melt, such as magnesium chloride, comprising a metal lined casing, a removable crucible with a horizontal bottom, a lid, a pouring trough and a drain pipe, characterized in that, in order to increase the service life of the bucket and reduce operating costs, the bucket is provided with a removable lined insert rigidly fixed to its casing, and the crucible is made integral with the drain pipe. Sources of information taken into account in the examination 1. USSR author's certificate number 209771, cl. B 22 D 41/00, 1966. 2. USSR author's certificate number 185084, cl. B 22 D 41/00, 1965.