SU150596A1 - Tuyere dl blow into cupola - Google Patents

Description

Air is blown into modern cupolas by tuyeres connecting the tuyere box to the cupola workspace. The disadvantage of such tuyeres is their slagging during the smelting process due to the cooling of slag with cold air at the outlet openings of the tuyeres.

A known method of cleaning the tuyeres from slag by knocking down slag build-ups with the help of a saw through the viewing holes of the tuyeres. However, this method of cleaning is physically and unsafe, since sparks blown through an open observation hole can injure workers.

The tuyeres are also cleaned by temporarily stopping the flow of blowing into the tuyere box, with the result that the temperature in the area of the tuyere mouth rises, the slag is melted and the tuyeres are cleaned. However, this method disrupts the normal smelting process.

It is possible to use a duplicated feed system to blow with two loncentric tuyere boxes and a double quantity of tuyeres. After switching the feed gate to blow into one or the other box, one of the tuyere groups alternately operates, while the other tuyere group is cleaned due to the melting of the slag wall. However, this method of cleaning the frum is cumbersome and is also associated with disrupting the smelting process.

The proposed tuyere for blowing into the cupola allows regulating the flow of blowing and shutting down for each slag melting and safe cleaning of each tuyere} separately, and also makes it possible to automate the flow regulation of blowing. For this, the lance is provided with a gate.

The drawing shows schematically one of several tuyeres installed in the cupola.

The lance consists of a body / and a branch 2 located in the side wall of the lance body and connecting the cavity of the tuyere with the cavity of the lance box 3. The branch is equipped with iber 4 to regulate the outlet cross section from the complete opening until fully closed. The tuyere is mounted by inserting its case into the tuyere hole, the cut-out in the casing of the cupola, and bolting the shield 5 to the box: 3. The lining in the cupola can be any one. To monitor the state of the tuyere, it is equipped with a deaf viewing eye 6. Air enters the tuyere box but the pipeline 7. At the beginning of the smelting process, the gates 4 of the tuyeres are open. The air supplied to the tuyere box 3 enters each tuyere via tap 2. After forming a slag tuff in the mouth of a slag tuff, the tuyere can close the tuyere and stop the air supply to the cupola. To remove the nastily close the gate 4 of this tuyere, stopping the flow of cold air into it. The slag wall melts, cleansing the lance, after which gate 4 is reopened.

Subject invention

A lance for blowing into the cupola, characterized in that, in order to control the boat, to blow into the cupola and secure its maintenance, the lance is equipped with a gate.