SU1175907A1 - Method and apparatus for milling slag - Google Patents

Abstract

1. A method of grinding slag by supplying it to a wettable reflective surface and subsequent cooling, characterized in that, in order to increase the efficiency of the process, the reflective surface is continuously wetted with water. 2. A slag grinding device containing a receiving tank-chute for supplying molten slag, a reflective surface and a discharge device, in that the reflective surface is made in the form of a non-grating, and the receiving tank is made with a chamber located I around the perimeter of the cross section containers, between the chute and besproval (LN, lattice, while the camera is made with an annular gap in the lower part and together with a besprovalnaya lattice is connected to the water supply.

Description

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This invention relates to the processing of metallurgical Slag, in particular slag from copper smelting.

The aim of the invention is to increase the efficiency of the process.

The drawing shows a device for grinding slags, a slit.

A device for grinding pshak contains a chute 1 for feeding molten slag, a vertical shaft 2, an unlatched grating 3, closed from the outside by a housing 4, the internal cavity of which is connected to the water supply 5.

The shaft 2 below the slag-feeding chute 1 is fixed corner 6, forming rings that chamber 7, to which the water supply line 5. To the bottom of the chamber corner b and the walls of the shaft 2 form an annular gap 8. In the lower part of the mine filled with water, a dewatering elevator is mounted 9 for discharging the crushed product The upper walls 10 of the shaft are rolled and a profiled bump 12 is installed in the hole 11.

Using the proposed device, the shredding method of grinding shpaks is carried out as follows. I

Before commencing the grinding, the shaft 2 is filled with water so that the cooling water layer is at least 2-3 m (according to safety measures) and water is fed into the chamber 7 and into the housing 4. Water will then be through the openings of the unprotected grille and Continuously oMiiiBaTb mine wall. The molten slag along chute 1 falls on a gratingless grid 3 wetted with water. The water under the melt evaporates almost instantaneously, and in the cavity of the shaft wall of the melt droplet a pressure zone of vapor mixture is created and this part of the slag is thrown onto the opposite wall of the shaft. At this time, the slag particle will have

still significant temperature and the phenomenon of garbage again.

When the melt contacts the wetted surfaces of the mine walls, portions of the melt cool and the occurrence of strong mechanical stresses due to temperature differences in the slag particles, which, with the strong impacts of the slag particles against the wall and against each other, will facilitate the grinding of pshak.

Complete cooling of the slag to the temperature of the cooling water is carried out in. bottom of the mine, filled with water. The discharge of the crushed slag from the slag is carried out by a dewatering elevator 9. The protection against the outflow of cusco is carried out by the rolled walls 10 and the profiled baffle 12.

Example. Spos (b tested in laboratory conditions. When simulating molten slag, molten lead was used. The results of the experiments are shown in Table. Molten lead was applied to the wall lubricated with mineral oil (experiment 1 and wetted with water (experiment 2). The experiments were duplicated, the table shows the average results.

The results of research have shown that using the proposed method and device for its implementation, the product of destruction is finer than when using the known method (when the surface is wetted with mineral oil), the grinding process is more efficient. P & cn / too Ut / fOffCf Larogego w / f Usb / tbvett ffbtu w / faff

Claims (2)

1. The method of grinding slag by feeding it to a wettable reflective surface and subsequent cooling, with the exception that, in order to increase the efficiency of the process, the reflective surface is continuously wetted with water. 2. A slag grinding device containing a receiving tank-chute for feeding molten slag, a reflective surface and an unloading device, characterized in that the reflective surface is made in the form of a wireless grate, and the receiving tank is made with a camera located along the perimeter of the tank cross section between the gutter and the wireless lattice, while the camera is made with an annular gap in the lower part and together with the wireless grid is connected to the water supply.