SU786344A1 - Lance - Google Patents

Description

(54) FURMA

one

The invention relates to the field of metallurgy, more specifically to its devices for the treatment of powdery materials of liquid metal in steelmaking aggregates, cast-iron and steel and BOHHbix ladles.

Tuyeres are known for injecting powdered reactants into a liquid metal in a gas jet, including the tube from which the powdered reactant enters the liquid metal together with carrier gas 1}.

Closest to the inventions) by technical drying and the achieved result is a tuyere for blowing metal melt with powdery materials in a stream of carrier gas, containing a tube lined with refractory material and a head connected to it with a nozzle 2.

A disadvantage of the known construction is that it does not provide the required absorption by the melt of the injected

powdered materials due to their significant growth with gas bubbles, made of metal.

The purpose of the invention is to increase the use of powdered materials by melt by separating a part of the carrier gas from the powder before it leaves the nozzle.

The goal is achieved due to the fact that the head is made in the form

10 cups, in which it is installed with a pipe axial to its bottom and radial to its walls.

The pipe and the head at the bottom can be made conical, and

15 head - with ring clicks,

The drawing shows the proposed lance, a longitudinal section. The tuyere includes a straight pipe 1 and a gchelovka 2 connected to it, refractory lined

20 material. The head 2 is made in the form of a glass, and the pipe 1 forms a gas exhaust path 3. The pipe 1 is coekshi9na with a head with 2 stiffeners and has

Claims (2)

Claim 1. A lance for purging a metal melt with powder materials in a carrier gas stream containing a pipe lined with refractory material and a nozzle head connected to it, characterized in that, in order to increase the absorption of powder materials by the melt by separating part of the carrier gas from the powder before it exits the nozzle, the head is made in the form of a glass in which a pipe is installed concentrically with an axial clearance to its bottom and radial clearance to its walls. 2. A lance according to claim 1, which is characterized in that the pipe and head in the lower part are conical and the head with ring slots.