SU771040A1 - Device fir pumice production - Google Patents

Description

one

The invention relates to the metallurgical industry, the building materials industry, and. imenno, to the production of slag pumice from metallurgical slag melts.

Presently operating cacopharyngeal installations, mainly hydro-screen ones, operate using a large amount of water, which is an expanding agent, a cooler, a vehicle.

As a result of prolonged contact of water with the slag melt in the apparatus, in the primrok, at the intermediate deposit 15, a lot of vapor is released, saturated with sulfur and other compounds. At the same time, intensive cooling of the expanded slag with excess water during the crystallization period drastically reduces 20 strength properties. Neutralizing and capturing steam-gas emissions in the production of slag pumice requires the construction of bulky, expensive gas-cleaning facilities, 25 a. excess water - devices for its sedimentation when reused.

The closest technical solution to this invention is 30

A device for the production of pumice from melted slag, containing successively installed V-shaped grooves having water supply holes in the bottom and mounted on the vibrating screen of the screen. 2D.

In this device, water undisturbed during the porisation process leaves the chute, which, firstly, reduces the quality indicators of the product obtained, since intensive cooling of the expanded slag with excess water during the crystallization period sharply reduces the strength characteristics, secondly, it pollutes the surrounding air pool steam-gas mixture containing harmful sulfur compounds.

The aim of the invention is to reduce the emission of the vapor-gas mixture and to improve the quality of the pumice stone by separating excess water during porisation and crystallization.

This goal is achieved by the fact that a device for producing pumice from a melted slag, containing a V-shaped trench, having openings in the bottom for conveying water, is provided with a catchment basin mounted above the trough in the form of a container with a receiving slit and an inclined wall above the latter.

Fig, 1 shows the described device; in fig. 2 - the same, a cross-section, polarized conventionally at the angle of inclination of the chute. The device contains gels 1 with openings in and E. :). R {OG 07; a collecting collector under it, with a slope of 10-20 (the horizontal slope of the sediment is measured. to the operational process), water collector 2 for catching the spout, tank 3 for accumulator / ton of water circulation, pump 4 g creating .NE-1e more than 30 atm, TpSfeonpoBo b system - gathering water supply and R 5 "

The operation of the proposed device .. is carried out in the following way.

Slag melt entering chute 1 at 1,300–1500 ° C and flowing through the open channel of gutter 1 is penetrated by jets of water flowing out of the holes in the bottom of the gutter and directed upwards perpendicular to the flow of the melt. The speed of water jets at high pressures is sufficient for the slag layer to penetrate to the spout. For example, at 40 atm, the velocity of water flowing out of the hole will be about 72 m / s, and the melt flow rate along the chute (if you drain 18 tons of slag from the ladle for 5 minutes and adjust the melt flow depth of 100 g to the chute angle) will be about 1.6 m / s. At the same time there is no water at the outlet of the donkey from the chute.

The swelling of the melt is achieved due to its contact with the outer surfaces of the water jets, which are only partially converted into vapor in the main mass out of the melt upward and hit the inclined wall of the sump. Further, the water spreads along the walls of the catchment basin and the Ss1motek enters the tank 3. The pump 4 directs high-pressure water back to the water supply collector and open it in the bottom of the outlet. The melt coming out of the chute does not come into contact with water and therefore does not emit harmful gases containing sulfur. The vapor-gas mixture containing sulfur compounds, during operation of the device, forms only above the chute. Its quantity in comparison with the existing installations is insignificant, due to the short-term contact of the donkey with water. Slag contact time with water

depends on the angle of inclination of the groove, its length and the number of holes in it: moreover, these parameters can be set arbitrarily and determined experimentally on the existing installation. With a small length of the gutter and a large angle of inclination, the contact time of the slag with water is minimal, for example, 2-3 seconds.

The steam-gas mixture is collected in the steam-collecting chamber b and is led through the steam-removal channel 7 to the gas cleaning facilities,

The proposed device will allow catching water that has not been assimilated during poreization and crystallization, closing it into an autonomous cycle, shortening the contact time of water with a donkey to a minimum, and therefore preventing excessive release of harmful vapor-gas formations, significantly reducing the specific consumption of water for polishing a spat, responding, steam gas cleaning products formed during the slag cutting 3 troughs

As a result of the use of the proposed device, the construction cost of slag-and-pelt units will be reduced by 10-30% due to a decrease in the volume of gas treatment facilities, which will be 1-2 million rubles for each slag-and-pelt unit.

 formula of invention

A device for producing pumice from a melted slag, containing an I-shaped gutter having water supply holes in the bottom, characterized in that, in order to reduce the emission of the vapor-gas mixture and improve the quality of the pumice stone by separating excess water during porisation and crystallization, it is equipped with a chute by a drainage gutter 3 as a container with a receiving slit and. sloping wall above the latter.

Sources of information taken into account in the examination

1. Grigoriev B.C. and others. Building materials, parts and products. Kiev, Budivelnik, 1970, p. 132.

2.Oryninsky N, V. Slag plant installation of a blast furnace at the N-Tagil metallurgical plant. - Slag processing issues, Chel Binsk I960, p. 368.

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Claims (1)

Claim A device for the production of pumice from slag melt, containing a V-shaped trough, having holes in the bottom for supplying water, characterized in that, in order to reduce the emission of the vapor-gas mixture and improve the quality of the pumice by separating excess water during porosity and crystallization, it equipped with a water collector mounted above the chute in the form of a container with a receiving slit and an inclined wall above the latter.