SU142665A1 - Autoclave installation for the introduction of magnesium into liquid iron under air overpressure - Google Patents

Description

Autoclave installations for the introduction of magnesium into liquid iron under elevated atmospheric pressure, with the placement of a ladle with liquid iron during its modification into a special chamber from which gases are drawn off, are known. However, the process of introducing magnesium into molten iron in them is not automated.

The proposed autoclave unit for the introduction of magnesium into liquid iron under air overpressure differs from the known ones in that it is equipped with a hydraulic actuator, an automatic pressure control valve and a magnetoelectric device for automatically performing a given mode, thereby achieving full automation of the process of introducing magnesium into liquid iron.

FIG. 1 shows a general view of the proposed autoclave unit; in fig. 2 - a general view of the mechanized part of the installation autoclave. The installation (Fig. 1) is a vertical sealed chamber with a diameter of 1500 mm with a hinged lid.

Inside the chamber is placed a bucket with molten metal with a capacity of 0.5-1.5 tons. The installation consists of the following main parts: a spherical cover /, a cylindrical chamber with a spherical bottom 2, a swivel mechanism of the cover 3, a bayonet locking mechanism 4, a device 5 for feeding magnesium with a “bell for pure magnesium”, a special siphon bucket 6 with a removable cross-bar and a lifting mechanism, and a support stand 7 for mounting the bucket.

The mechanisms of the autoclave installation are driven by power hydraulic cylinders, which are powered by a power hydraulic unit at an operating pressure of 65 kg / cm. The operation of the mechanisms is carried out by a push-button device, located, No. 1 142665-2, 1 | a ,, п ,, (directors. The control scheme allows for the kick-down operation mode of the installation, as well as automatic; ..., ;;

 a) after the installation of a kbvi1a in an autoclave, the operator presses the button automatically; as a result of which the lid is lowered and locked, on the cistern1K @ tuda chuckled device for feeding the magnesium from the bell bell. for neither, worth. m & gna.

All subsequent operations: supplying overpressure to the set value, lowering the "bell with magnesium and holding it in the ladle with metal, lifting the rod with the bell, blowing the cavity of the autoclave from oxides and magnesium vapors, reducing the pressure, opening the bayonet mechanism and lifting the lid to the original the position occurs automatically by means of contact time relays found at the magnetic station of the installation.

Technical characteristics of the proposed autoclave unit

Volume of autoclave installation,, 7

Overall dimensions of the autoclave (mm):

diameter 2750

height 3300

Weight in working condition, kg 8450

Working overpressure, kg / cm 5

Operating hydraulic pressure, kg / cm 65

Technological cycle, min5,5

In addition to the autoclave plant itself and the siphon bucket with a removable cross member and swivel mechanism, the area for producing magnesium cast iron (Fig. 2) is equipped with the following auxiliary equipment: a hydraulic power unit /, a control panel 2 with a magnetoelectric station, an automatic pressure control valve 3, a desiccator 4 compressed air, magnetoelectric station 5 and cyclone 6 for air purification from magnesium oxides. Site maintenance is done by one person.

The autoclave unit is designed for two-shift operation with an annual output of magnesium iron of 6 thousand tons, with a maximum weight of castings up to 1.3 tons.

Subject invention

An autoclave unit for introducing magnesium into liquid iron under air overpressure, consisting of a vertical sealed chamber with a lid in which a molten metal bucket is installed, and a device for supplying magnesium, which is equipped with a hydraulic drive to automate the process , an automatic pressure control valve and magnetoelectric devices for the automatic implementation of a given mode.

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