RU27360U1 - INTERMEDIATE DUCK - Google Patents

Description

Object - Utility Model

 JIB mil ta, .L -C „ble

2 0 0, l | IIIIIjilHI Illll I

Installation for out-of-furnace cast iron processing

The utility model relates to metallurgy, and more particularly to equipment for out-of-furnace treatment of cast iron in a converter plant for the removal of silicon, sulfur and phosphorus.

Known bucket for out-of-furnace treatment of melts with reagents, containing a lined casing, in the bottom of which there are cells with refractory caps, connected to replaceable bypass tubes installed in the lining. The inlet openings of the tubes are blocked by refractory plugs. The bucket is equipped with plug extraction mechanisms that are rigidly fixed to the upper part of the casing with the possibility of a half turn around a horizontal axis. The bypass tubes are made through. The mechanism for extracting plugs is made in the form of a two-arm lever, one shoulder of which is free, and the other is pivotally connected to a rod rigidly fixed to the plug. The lever is equipped with a position lock, for example, a wedge. A disadvantage of the known design is the impossibility of using it in large-scale production, for example, in converter production (see USSR AS No. 869964, IPC V22D41 / 00).

Known bucket for out-of-furnace treatment of liquid melt with gas. Which contains a housing and tuyeres for supplying gas mounted along the perimeter of the bucket in the lower part of its side walls. The bucket is additionally equipped with tuyeres mounted horizontally in its side walls at the level of the slag belt, and their inclination in the horizontal plane is opposite to the tuyere inclination. Located at the bottom of the side walls. NMPK

a disadvantage of the known construction is the complexity and inability to use cast iron for after-furnace treatment in the converter steel production (see AS USSR No. 1197772, IPC V22D41 / 00).

Closest to the proposed utility model is an installation for out-of-furnace metal processing, which is a bucket with a lid and placed; mounted permanently on special floats; adca near the crane for lifting and lowering the tuyeres are welded containers for powder-type reagents. The installation is equipped with gas pipelines for purging metal. A disadvantage of the known design is the obligatory presence of a lid on each bucket.

When out-of-furnace treatment of cast iron in the converter shop before pouring it into the converter, the operation of removing the lid from the ladle negates the gain in reducing the melting time due to the additional processing of metal in the ladle (see the book by V. Kudrin. Out-of-furnace treatment of cast iron and steel. -M .: Metallurgy. 1992.S. 178-179).

The technical effect when using the proposed utility model is to reduce the duration of converter smelting, and accordingly, increase the durability of the lining of the converter due to the additional out-of-furnace treatment of cast iron in the ladle before pouring into the converter.

This technical effect is achieved by the fact that the known installation comprising a bucket, a lined lid, a lance with a mechanism for raising and lowering it, as well as containers with powder reagents located on special platforms equipped with devices for pumping and transporting them to the lance, is additionally equipped with a stand for placement of the bucket, made in the form of columns with beams installed on them for equipping the tracks under the self-propelled retractable roof platform, under which the shaft is permanently fixed to the bucket coaxially terovannaya cover with a lance for insertion into the melt and gas reactants.

The essence of the utility model is illustrated in the drawing, which shows the installation diagram in section.

The installation consists of a stand for placing the bucket 1, which is made of columns 2 with beams 3, forming metal structures under the path 4 of the self-propelled retractable roof - platform 5, From the bottom on the platform 5 there is a lined cover 6 placed coaxially with the bucket 1. The mechanism for lifting and lowering tuyeres 7 for introducing reagents into liquid cast iron and mixing them with oxygen, nitrogen or argon is placed on a self-propelled roof - platform 5. The installation is equipped with containers for reagents for out-of-furnace treatment of cast iron in a ladle and the flue gas supply to the lance 7 (not shown).

The proposed installation for out-of-furnace cast iron processing in the ladle works as follows.

Ladle 1 with cast iron is placed on the stand for the installation of out-of-furnace treatment of cast iron just before pouring it into the converter. Then, a lined cover 6 is pushed onto the bucket 1 with a self-propelled retractable roof - platform 5, through the hole in which the lance 7 is immersed in molten metal to perform one of the operations of out-of-furnace treatment of cast iron with reagents to remove silicon, sulfur or phosphorus. from containers placed on the roof - platform 5, As a result of the injection of reagents into the cast iron through lance 7, favorable conditions are created for removing excess silicon content into slag. Sulfur and phosphorus. After the pig iron is treated with powder reagents in a gas stream from the bucket 1, the self-propelled roof moves - the platform 5 with the tuyere 7 raised to an inoperative position. Then, an operation is performed to remove slag from the cast iron surface. The temperature and composition of the cast iron in the ladle are controlled, after which the ladle 1 with cast iron is transferred to the converter for pouring.

speedy delivery of it to the place of pouring into the converter without intermediate operations of removing the sealed lid from each bucket. This will also increase the resistance of the lining of the converter by conducting reactions in the bucket before pouring.

Claims (1)

An intermediate ladle, including a lined metal case and a lid consisting of frames, on each of which a refractory plate is fixed, consisting of lined elements interconnected, each of which contains a frame, characterized in that the frame is lattice, while in each of the lined elements located in the installation zone of the submersible refractory pipe, the ratio of the thickness of the ribs of each of the frames facing the central vertical axis of the intermediate ladle to the thickness of the ribs adjacent to them Report 1: (0.30-0.92).