JPS6210944B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a water slag manufacturing apparatus. That is, the present invention relates to a technique for producing slag having a predetermined bulk density by pouring slag melted in an electric furnace or the like into a water tank, cooling and pulverizing it. Particularly, the present invention provides an apparatus for producing molten flux for welding, which is adopted in recent advanced welding technology and requires strict quality control and characteristics. Conventionally, there are two types of water slag based on its shape: one is glass-like and crushed, and the other is foamed pumice-like and crushed. Glass-like products are produced by forcedly cooling the molten slag with water.
It is relatively heavy with a bulk density of 1.2 to 2.0 g/cm ³ . The method for obtaining this water slag product is water pressure 3.
There is a method called jet water fracturing method that uses pressure water of ~8 kg/cm ² . This method will be explained using FIG. 1 as follows. First, the molten slag melted in an electric equalization furnace or the like is temporarily received in a ladle, or through a tundish, or in the case of a top pouring furnace 1, the jet water 9 installed horizontally or inclined is discharged directly from the furnace by adjusting the tilt angle. In this method, the water is poured into a trough 4 to crush the water. That is, the molten slag 2 poured into the pressure water pipe 6
The pressure and amount are adjusted by the valve 7, and the water is discharged into the trough 4 as jet water 9 through the water discharge adjustment plate 8.
It collides with the jet water 9 released into the water and is rapidly cooled.
It is crushed and flows out together with discharged water 5 to proceed to the next step. This method obtains glass-like water slag powder particles by adjusting relatively high water pressure and high-speed thrust flow, so the water slag can be foamed or turned into pumice, and the bulk density can be adjusted to the desired density. I can't. Furthermore, as a method for obtaining pumice-like water slag, the method shown in FIG. 2 has been implemented. In this method, the molten slag 2 discharged from the melting furnace 1 has a water inlet 15,
The cooling water is poured into the cooling water 13 filling the water tank 12 through the drain port 16 . A basket-shaped wire mesh melter 14 is submerged in this water tank 12. In order to foam the molten slag and turn it into pumice using this water tank, pour the molten slag 2 while adjusting the output amount (discharge speed) in the direction of decreasing it, float it once, and push it down using the pushing rod 17 from above. Stir and cool. Water slag is wire mesh melter 1
Pumice-like water slag 11 is deposited in 4, and later the wire mesh melter 1
4 and collect it. This method is difficult to automate and relies on force, and tapping the hot water is often carried out in a hot, humid work environment that also generates odorous gas.
There's a problem. Therefore, even if carried out, only extremely small quantities can be produced inefficiently. As described above, various methods and devices for continuously producing water slag have already been developed and put into practical use; Even if you try to obtain the bulk density in trough ⁴ , if you use jet water, it is difficult to control the bulk density within the specified range because high pressure water of 3 kg/cm ² or more is used. If the flow becomes poor, there is a risk that uncooled high-temperature slag will become clogged and react with water, causing a steam explosion. In addition, the pushing operation of floating and depositing the slag into the wire mesh container 14 in the water tank 12 takes a long time, 15 to 25 minutes, to process 1000 kg of slag, which is inefficient and hard work, and is completely impractical for mass production. Not on point. Furthermore, in order to obtain a pumice-like flux for welding, the melting temperature is higher than that for glass-like flux, and moreover, a larger amount of reducing agent (graphite, etc.) is used.
Metal oxides such as MnO, SiO ₂ and FeO are reduced and accumulated as metals at the bottom of the furnace. When the molten slag decreases during melting and tapping, and this metal begins to mix in the slag, the furnace is tilted further to drain almost all of the molten material in the furnace, and new raw materials are introduced to restart melting. The flux that is mixed with this metal contains metal in the form of particles or flakes, and it is difficult to separate the metal and process it into products, so most of it is actually discarded. The present invention has been made in view of these problems, and specifically includes a box-shaped aquarium main body 19 having a bottom portion 34 formed by slopes 36, 36 and sloping upward in the front direction, and the aquarium main body 19. A trough 20 forming a discharge outlet at the front part of the water tank body, a group of injection pipes for fluid is provided on the rear wall 35 of the water tank main body, and a group of water discharge pipes directed to the discharge outlet are provided at the upper end of the side wall. This is a unique water slag manufacturing device. Furthermore, if necessary, compressed air is injected together with pressure water, or vortex stirring is performed using a screw. Next, one example of the present invention will be explained in detail using the drawings. FIG. 3 is a schematic diagram of the device of the present invention, in which A is a plan view of the device, B is a side view of the device, and C is a rear side view. First, an aquarium main body 19 having an inclined bottom 34 is provided with a discharge outlet 32 at the front thereof, and a trough 20 for discharging the water is attached. Rear part 3 of water tank 10
5 and the bottom part 34, there are injection pipe groups 22 to 22 which inject pressurized water or compressed air and are attached to the injection direction variable.
25 is installed. Also, at the upper part of the side wall of the water tank 19, there are a group of water discharge pipes 26, 27 for discharging pressurized water.
28 and 30 are attached so that the water discharge direction can be changed.
36 is a slope. Furthermore, a screw 29 for vortex stirring is installed into the water tank from the bottom 34. Injection pipe group 22~
25. Although the water discharge pipe groups 26 to 28 and 30 are not shown, they are connected to a device that can supply pressurized water and compressed air at arbitrary pressures and amounts. The operation of the device of the invention will now be described. Melting furnace 1
From there, the slag 2 is poured into water filled in a water tank 19 through a runner 31. The molten slag poured into the water tank 19 is continuously cooled by pressure water injected from the injection pipe groups 22 to 25, and is sent to the next process from the discharge outlet 32 via the trough 20 and the conveyor 33. The components and temperature of the slag poured into the water tank 19,
Injection pipe group 22~
For the purpose of supplying compressed air together with pressure water to the water tank 25 and equalizing the residence time and temperature in the water tank 19,
If necessary, vortex stirring by screw 29 is added to adjust the degree of cooling and pumice formation. In addition, in order to move the water slag floating in the water tank 19 to the discharge trough by the water flow of the water tank and further forcibly remove it from the water surface, pressure water is discharged from the water discharge pipe group 26 to 28, 30. The water slag is forcibly moved by pouring the slag to ensure that the slag 2 continuously poured one after another hits the water surface. Furthermore, in order to rapidly cool and reliably crush water, the water discharge pipe group 30 is buried in water with the water discharge pipe group 30 facing downward to accelerate cooling. Next, if metal is mixed into the slag, the metal will naturally settle at the bottom of the water tank 19 due to the difference in specific gravity between the slag and the metal or metal-containing slag. Water slag 5 from trough 20
is sent to the next process and becomes a product through processes such as dehydration, drying, crushing, and sieving. A summary of methods for obtaining various bulk densities using the methods and devices detailed above is as follows. (1) When obtaining pumice-like water slag with a bulk density of 0.5 to 1.3 g/cm ³ , pour the slag into a water tank and it will foam when it comes into contact with the water, floating on the water surface.
8,30 to the transfer trough 20. (2) When producing relatively light pumice slag with a bulk density of 1 g/cm ³ or more, vortex agitation by the injection pipes 22 to 25 and the screw 29 is used to promote floating transfer of sediment. and achieve it. (3) When producing glassy slag with a bulk density of 1.3 g/cm ³ or more, use the water discharge pipe 30 to forcibly sink the slag 2 under the water surface by using high pressure and directing the water into the water. to accelerate cooling and pulverize, and inject pipe 2.
2-25, levitate using screw 29,
It is transferred to the trough 20 by a group of water discharge pipes 26-28. (4) When producing water slag with a bulk density exceeding 1.5 g/cm ³ or more, in addition to the injection pressure water of injection pipe groups 22 to 30, a flow rate of 1 to 2 m ³ /min at 5 to 6 kg/cm ² is added. Use with compressed air. The injection pipe and water discharge pipe are not limited to being used at the same time, but may be stopped and adjusted as appropriate. Next, an embodiment of the present invention will be described using an example of producing inclined tap metal by melting a melted wax for welding in an electric melting furnace. Table 1 shows the relationship between the shape and bulk density of the water slag, the water pressure and amount, and the operating conditions, and also shows the components of the flux used in this example.

【table】

【table】

[Table] When the molten slag discharge progresses and metals deposited at the bottom of the furnace begin to mix in, it is possible to adjust the injection conditions to allow only the metals or metal-containing slag to settle and accumulate at the bottom of the water tank. can. As is clear from the examples, according to the present invention, even with the same slag, a desired shape and bulk density can be obtained by selecting each device and each condition. Further, in the case of welding flux, it is necessary to avoid metal contamination, but according to the present invention, it can be easily separated and collected.

[Brief explanation of the drawing]

1 and 2 are schematic side views showing the conventional method, and FIG. 3 is a schematic view of the present invention, in which A shows a plan view, B shows a side view, and C shows a rear side view. 1... Top pouring furnace, 4... Trough, 6... Pressure water pipe, 9... Jet water, 14... Container, 17
... Push rod, 19 ... Water tank, 20 ... Trough, 22, 23, 24, 25 ... Injection pipe, 26,
27, 28, 30... Water pipe, 34... Inclined bottom, 35... Water tank rear, 36... Slope.

Claims (1)

[Claims] 1 Consisting of a box-shaped aquarium main body having a bottom part formed by a slope and tilted upward in the front direction, and a trough forming a discharge outlet at the front part of the aquarium main body, and a fluid outlet on the rear wall of the aquarium main body. 1. A water slag manufacturing device, characterized in that a group of injection pipes is provided, and a group of water discharge pipes directed toward a discharge outlet are provided on the upper edge of a side wall.