SU948930A1 - Apparatus for producing slag pumice - Google Patents

Description

one

The invention relates to the industrial strength of building materials, the metallurgical and chemical industries, and is intended for the production of porous aggregates from melts of blast-furnace and phosphoric slags.

A device for producing slag pumice is known, comprising a system of chutes, at the end of which there are nozzle boxes l.

The disadvantage of this device is the clogging of water nozzles in the nozzle boxes by slag particles in the water coming from the circulating water supply cycle of the slag processing plants. This is due to the fact that in the nozzle box there is a direct flow of water that does not prevent sedimentation of suspended solids in it.

The closest in technical essence and the achieved effect to the invention is a device for

2

manufacturing, slag pumice, containing a water-air foil, above the air nozzle of which a feed chute with a nozzle box 2 is installed.

The drawbacks of the device are that the sediment accumulating in the nozzle box gradually blocks the water supply holes and thereby significantly changes

10 mode of the expansion process and the quality of the product.

The resulting precipitate is strong enough, as the particles of slag, ate-. hydrating it, possesses hydraulic

15 active. This prevents the use of lime milk for the porisation of slag melt, due to which it would be possible to significantly reduce the bulk mass of slag.

Claims (2)

20 pumice stones and thereby increase the effectiveness of its use in lung beta 4x. Lime milk always contains a small amount of 3 solid, non-quenched particles, which produce a solidifying precipitate. The aim of the invention is to improve the reliability of the device and improve product quality. This goal is achieved by the fact that a device for producing slag pumice, containing an air duct, hydraulic grooves and a nozzle box, the rear wall of which is made with a cutout, is equipped with a cylindrical tank with a tangential water outlet, a removable lid on one end and a mesh on another connected to the rear wall nozzle box. Figure 1 shows the device, a longitudinal section; in fig. 2 shows section A-A in FIG. 1 in FIG. 3 - razch cut BTB in FIG. 1 in FIG. C - resolution bb in fig. 1. The device contains a nozzle, a cork 1 with nozzle openings 2. A container 3, which consists of a cylindrical lateral surface k, a removable cover 5, and a tangential-water supply nozzle 6, directly communicates with the nozzle box. At the opposite end of the container there is an annular collar 7, the protective grid 8 adjoins the KijTopoMy. less than the diameter of the nozzles. The nozzle morobka is adjacent to the hydraulic groove 9. Under the hydraulic groove there is a section of the air duct 10, which passes into a segment air nozzle 11. The hydraulic groove and air nozzle adjoin the acceleration plane 12. The air nozzle and the acceleration chamber are equipped with supports 13. The device works as follows. Air flow is directed through duct 10 to segment air nozzle 11. At the same time, water or milk of lime is fed through a tangential pipe 8 into a container 3 formed by a cylindrical surface 4 and a removable lid 5. It passes into the nozzle box 1, and through the nozzle orifices 2, under pressure, flows out into the hydraulic groove 9. Due to the tangential supply to the container and the nozzle box, a turbulent motion of the liquid is formed, which prevents the suspended particles from settling in it. Large particles are retained by the protective net 8, and small O with water passes through the nozzle openings. Periodically during the gaps in the operation of the device, the removable cover 5 of the container is taken away, the net is removed and cleaned, after which they are fixed in place. At the same time, a stream of slag is directed to the hydraulic chute 9. Jets of water or milk of lime permeate the slag melt. The incompletely porous slag melt, as well as water or milk of lime that has not evaporated, is drained from the hydraulic grooves and encounters air flow from the air nozzle 11, which disperses them and discharges them at a considerable rate from the acceleration chamber 12. Semi-liquid porous slag and sprayed water or milk of lime is thrown out of the screen, where the slag is reunited into a still moving mass. At the same time, a certain number of particles sprayed with lime or lime mortar are encapsulated within the volume of slag. The remaining particles of water are also reunited and the streams together with the slag mass come off the screen to the receiving devices, where the process of its porisation, which proceeded, is completed. all the way slag moves. The screen and receiving devices are not shown in the drawings. The advantages of this device are that the clogging of the nozzle holes by solid particles, which are suspended in the circulating water of the slag processing plants or in the milk of lime, is prevented; sedimentation at the bottom of the nozzle box of the above-mentioned solid particles and their subsequent monolithing is prevented. This increases the reliability of exploitation of slag melts and opens up the possibility of using lime milk for the porisation of slag melt. In turn, the latter event makes it possible to significantly improve the quality of slag pumice by reducing its bulk density. Claims of the Invention , in order to increase the reliability of the device and improve the quality of its products, it is equipped with a cylindrical tank with a tangential water inlet pipe, a removable cap on one end and a grid on the other. -5 0 "connected to the back wall of the nozzle box. Sources. Information taken into account in the examination 1. USSR author's certificate №, cl. C O B 23/02, 196. 2, USSR Copyright Certificate No. 337260, cl. C In S / Oi, 1969 (prototype). x1GG h 6-s ff, 2 (. 3