SU973618A1 - Apparatus for separating melts - Google Patents

Description

one

o The invention relates to ferrous metallurgy, in particular to devices for the separation of iron and slag in blast furnace production.

The closest to the invention of the essence is a device for the separation of melts containing a main chute with a slag-withdrawing ditch adjacent to it, a main skimmer plate with a separator in the form of a horizontal shelf 1.

A disadvantage of the known device is that the fixed position of the separator at the level of the cast iron pass is not optimal, since the slag – cast iron separation plane in front of the main skimmer is significantly lower than the cast iron pass due to the static pressure of the slag layer in front of the screen. In the gutters having a depth of the pre-dimensional space of 1000–1300 mm, the interface of the donkey-cast iron in front of the skimmer is below the level of the cast-iron pass by 250- .50 mm, which means that the separator is

(it boils in the slag layer. It is flown around, not slag. (above) and cast iron (below), but only slag. Slag that has fallen under the times, the divider, can no longer go anywhere except with the cast iron in the cast-iron ladles, since the separator tightly connected with the plate and walls of the Gutter, and from the only open side of the jjftvcKstcK stream with kinetic energy significantly exceeding the natural lifting force of the slag (Archimedean force).

0 It turns out that the slag that is below the separator is pushed by 1 of the melt into the sub-hole.

The aim of the present invention is to increase the degree of melt separation and

15 prevent slag from falling into iron buckets.

The goal is achieved by the fact that in the device (for the separation of the melts containing the main chute adjacent to

20 there is a slag groove, a main skimmer plate with a separator in the form of a horizontal shelf, the separator is made in the form of a plate, freely installed in 39 guide bushings and located on the main skimmer plate at a distance of 0.1-0.2 of the width of the main groove. The separator can be made, like the skimmer, of metal and coated with carbonaceous matter or any refractory material suitable for working in the molten iron-slag. FIG. 1 shows the gutter and device, general view, section; in FIG. 2 - the same plan. The device consists of a lined main gutter 1, a plate skimmer; 2, separator 3, slag removal 4, cast iron pass 5, chutes 6 for cast iron, bearing rods 7, guide sleeves 8, lowering limiter splitter 9, load balancer 10 and a removable carrier farm 11, which is crush to the metal base of the chute. The specific gravity of the separator when assembled must be greater than the weight of the slag, but less than the iron. The final adjustment of the ratio: the specific gravity makes it possible to make the load balancer. The dimensions of the separator (in plan) should be such that in the lowest position. it was not less than 0.1 of the width of the chute at the place of its installation in order to prevent its welding to them after the melt was lowered, and from the surface of the lining of a skimmer plate at a distance of 0.1 0.2 of the width of the chute ( B) in front of it, in order to ensure free-flowing particles of slag that fall under the separator. When the gap is less than 0.1 V, the divider 5 may be welded to the skimmer plate, and with a gap of more than 0.2 V, the pre-spaced space will be inefficient, since the larger the divider is, the more efficiently it will work. The device works in the following way. The stream of smelting products enters the main chute 1, the flow through which meets on its way the separator 3 of the melt, which is located on the border of the slag and metal. carrying drops of cast iron that failed to settle, flows around the separator from above and is held up by a skimmer plate 2. A sudden change in direction and speed {flow of the slag stream when meeting the separator and skimmer plate contributes to a more complete sedimentation iju iron droplets from the slag. Cast iron droplets flow down the inclined surface of the separator 3, flow around it from below and under skimmer plate 2 through pass 5 enter chute 6. Slag, meeting skimmer plate 2, turns 90 ° and goes into slag-removal 4. Under all modes of melt extraction blast furnace, regardless of the degree of filling of the main chute with the melt and the ratio of the amount of iron-donkey, the proposed separator is located on the slag-iron section plane and to ensure high-quality separation of the melt. Thus, the implementation of the proposed device for the separation of melts under production conditions makes it possible to increase the efficiency of extracting iron from slag and prevent slag from entering the pig-iron ladles. The loss of pig iron with slag at the highs 1.18% relative to the output of iron. The application of the proposed device | X) reduces the loss of cast iron by about 2 times. A 1% reduction in the amount of slag coming in with the cast iron reduces the sulfur content in the cast iron by 0.0020.005%. Formula of the invention The apparatus for separating the melts, comprising a main chute with a slagging groove adhering to it, a main skimmer plate with a separator in the form of a horizontal shelf, characterized in that The separator is made in the form of a plate, freely installed in guide sleeves and located from the main skimmer plate at a distance of 0.1-0.2 of the width of the main trough. Sources of information taken into account when examining 1. USSR author's certificate N 665000, cl. From 21 to 7/12, 1978.

Claims (1)

Claim A device for separating melts, comprising a main chute with an adjacent slag discharge groove, a main skimmer plate with a separator in the form of a horizontal shelf, characterized in that, in order to increase the degree of separation of the melt and prevent slag from entering the cast iron ladles, the separator is made in the form plate freely installed in the guide bushings and located from the main skimmer plate at a distance of 0.1-0.2 of the width of the main groove.