SU1284963A1 - Installation for granulating slag - Google Patents

Abstract

The invention relates to metallurgy, in particular to the granulation of metallurgical melts, in particular to the domain slag granulation. In order to reduce production, capital and operating costs, increase reliability in a slag granulation plant containing at least one working and backup production lines, the receiving chamber and the clarified water chamber are made common to all technological lines in the form of a bunker a sump 3, divided into chambers by a vertical partition 5 not reaching the bottom, the slag chambers of the lines are located in the lower part of the clarified water chamber, with the latter in the middle part lena thin layer grille 9, airlift 10 is capable of vertical movement. 1 hp f-ly, 2 ill. and with

Description

N

Liquid slag

15

Sheer vazo to hydro / mtsch /

g

4 O5 CO

The invention relates to metallurgy, in particular to the granulation of metallurgical melts, in particular to the domain slag granulation.

The aim of the invention is to reduce production space, capital and operating costs, increasing reliability.

FIG. 1 shows a schematic installation, vertical section; in fig. 2 - the same in terms of.

The installation is shown with one working and one backup technological lines. It contains slag grooves 1, under which the hydrogranules 2 are located, adjacent to them are a bunker-settler 3 with an extended pipe 4. In the bunker-settler 3, a vertical partition 5 is installed, dividing it into the receiving chamber 6 and the chamber 7 of clarified water.

Slag chambers adjoin the lower part of the settling bunker 3. The number of chambers 8 corresponds to the number of technological lines in the installation.

In the middle of the clarified water chamber 7, a thin-layer grating 9 is mounted to hold the slag and completely clarify the circulating water. The installation also contains slag airlifts 10, a dewatering device 11, a device 12 for supplying clarified water to a hydrogranule 2, trays 13 and 14 for self-flowing supply of water separated from slag to a bunker-settler 3 and conveyors 15 for cleaning slag from the installation. In the lower part of the vertical septum 5, the octagonal granulator 2 is dispersed and partially cooled, after which the particles of the spit are fed into the settling bin filled with recycled water 3. 5 The resulting steam is discharged through the chimney 4 to the atmosphere. The postpartum into the settling bunker 3, the slag particles are finally cooled due to gravity forces and the deposited 10 movement of water circulating in the circulating system is deposited and through the hole under the vertical partition 5 enters the slag chambers 8.

After the accumulation of granulated slag in the slag-chamber 8, the slag airlift 10, which is in the upper position, is lowered by means of a drive and sucks the slag slurry with the optimum solid-to-liquid ratio, then feeding it into the dewatering device 11.

The water, separated from the slag in the dewatering device 11, is drained back through the trays 13 and 14. into the settling bunker 3, and the dehydrated slag conveyor 15 is removed from the installation.

In the process of slag granulation, the circulating water from the receiving chamber 6 30 of the bunker-settler 3 through the hole under the vertical partition 5 enters the chamber 7 of the clarified water, passes through the thin-layer grating 9, which delays suspended particles of the slag 35, and the clarified water through the device 12 dl water supply flows back into the hydrogranor 2.

In this mode, the arrival of gran

25

slag and circulating water from the reception

A damper 16 of a slide valve or a chamber in a reverse-type clarified water chamber for adjustment is propelled by a damper 14 by changing the bore through the cross section of the hole under the vertical partition 5 and thereby changing the ratio of flow rates in this hole and in the chamber 7 clarified water. Oversized items that accidentally fall into the receiving chamber 6 of the settling bunker 3 are retained by the grid- 17.

the opening section under the vertical partition 5 between the receiving chamber 6 and the clarified water chamber 7.

Shpakovy airlift 10 is installed with the possibility of vertical movement by means of a drive, such as an electromechanical (not shown).

In addition, a grate 17 is mounted in the receiving chamber 5 of the settling bunker 3 for retaining random oversized items.

The installation works as follows.

The molten slag flows by gravity to the installation along chute 1, is poured onto the stream of water formed

By combining two (or more) production lines with the help of a common settling bunker, 55 equipping it with a thin-layer grid and making slag airlifts with the possibility of their vertical movement, it is possible to include all lines in a simultaneous

by the hydrogranulator 2, is dispersed and partially cooled, after which the particles of the spit are fed into the settling bin filled with circulating water 3. The resulting steam is discharged through the exhaust pipe 4 to the atmosphere. The postpartum into the settling bunker 3, the slag particles are finally cooled by gravity and the deposited movement of the water circulating in the circulating system is deposited and through the hole under the vertical partition 5 enters the slag chambers 8.

After the accumulation of granulated slag in the slag chamber 8, the slag airlift 10, which is in the upper position, is lowered by means of a drive and sucks the slag slurry with the optimum solid-to-liquid ratio, then fed to the dewatering device 11.

The water, separated from the slag in the dewatering device 11, is drained back through the trays 13 and 14. into the settling bunker 3, and the dehydrated slag conveyor 15 is removed from the installation.

In the process of slag granulation, the circulating water from the receiving chamber 6 of the bunker-settler 3 through the hole under the vertical partition 5 enters the chamber 7 of the clarified water, passes through the thin-layer grating 9, which delays the suspension of granular slag, and the clarified water through the device 12 for water supply re-enters the plasma pellet 2.

At the same time the mode of receipt of gran

By combining two (or more) production lines with the help of a common settling bunker, 55 equipping it with a thin-layer grid and making slag airlifts with the possibility of their vertical movement, it is possible to include all lines in a simultaneous

working, increasing not less than twice the specific consumption of water for slag processing, reducing the temperature of the recycled water and improving the quality of the slag, eliminating the clogging of airlifts with slag, and also provides a complete clarification of the circulating water.

Thus, the use of pred634

 . backup process lines.

each of which contains a hydraulic crane installed at the entrance to the receiving chamber, an airlift installed in the slag chamber, and a device for supplying clarified water to the hydraulic granulator connected to the chamber of clarified water, which is in order to reduce

the installed plant will allow to reduce the production area, capital dimensions and, accordingly, the production area required for its placement, to reduce capital and operating costs for its construction; maintenance, ensure complete clarification of the circulating water and thereby eliminate abrasive equipment wear and, consequently, increase the reliability and the overhaul life of the installation, which in the water, and in the latter on average, ensures reliable and uninterrupted processing of liquid slag in valuable building material, for example, directly at the blast furnace.

Invention Formula

Claims (2)

1. Installation for slag granulation, mainly blast-furnace, containing a receiving chamber and a clarifying chamber with at least one working water. its parts are set up with a thin grating, and the earl: ifft is made with the possibility of vertical movement. 2. Installation according to claim 1, in which the valve is mounted in the lower part of the vertical partition to regulate the flow area of the meddu orifice operating costs, increased reliability, the receiving chamber and the clarified water chamber are made common to all technological lines in the form of a settling bunker, divided into chambers with a vertical partition not reaching to the | Bottom, while the slag chambers of the lines are located in the bottom parts of the camera clarified water, with the latter in the middle receiving chamber and clarified water chamber. its parts are set up with a thin grating, and the earl: ifft is made with the possibility of vertical movement. 2. Installation according to claim 1, in which the valve is mounted in the lower part of the vertical partition to regulate the flow area of the meddu orifice Backwater to hydrogranule 12 J Rev. Water to 7th yp nypy