JPS58663Y2 - Slag supply device for water slag production - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a slag supply device for producing slag.

As is well known, the amount of slag generated in blast furnaces is large, so various studies have been conducted on how to effectively utilize it.
Many developments have been made, and among these, a method for producing fine aggregate for concrete through water pulverization is also known as a typical processing method.

By the way, when producing hard slag (hereinafter referred to as slag) such as fine aggregate for concrete from the slag discharged from a blast furnace, a slag crusher is usually installed at the end of the slag gutter. A slag production device with a blown box blows high-pressure water from the surroundings toward the flowing slag to crush it, producing granular slag in sequence.

However, the slag flow sent to the slag production equipment usually has changes in slag temperature and slag flow rate over time, and if it is granulated as it is, the quality tends to vary, so it is not suitable for use in concrete. In order to obtain a quality suitable for fine aggregate, it is necessary to lower the temperature below a certain level to adjust the viscosity of the slag, and to supply the slag at a constant flow rate to the slag manufacturing equipment.

In addition, - In order to carry out stable slag operation for a long period of time, a slag storage tank or a slag steel car is required, and the slag storage tank generates a lot of slag after the slag is completed, and the slag steel car is equipped with a pot. This caused the yield to deteriorate.

Additionally, due to existing blast furnace equipment, there were restrictions on where to install the slag production equipment.

Furthermore, there was a small amount of hot metal mixed in the slag flow, and when the slag was crushed in the slag production equipment, there was a risk that the molten gun would react with the high-pressure water used for slag and explode. .

This invention provides a slag supply device for producing slag, which aims to eliminate the above-mentioned drawbacks.

This idea involves forming a slag storage tank in the slag gutter, having a slag stirring device on the upstream side of the slag storage tank, and disposing a weir with a slag outflow hole on the downstream side so that it can be raised and lowered. , a slag gutter for connecting to the slag outflow hole and passing the slag to the slag production equipment, and a slag gutter for slow cooling that leads to the dry pit or the slag steel car on the downstream side of the weir. 7.

By using this device, the temperature of the slag can be adjusted in the slag storage tank, and the slag and hot metal can be separated by specific gravity into upper and lower layers using a slag stirring device, and only the upper layer slag can be kept at a constant flow rate. It can flow.

Therefore, water slag with good quality can be produced.

An embodiment of this invention will be described below with reference to the drawings.

As shown in FIG. 1, a slag storage tank 2 with a large depth and width to sufficiently store slag is provided in the middle of a slag trough 1, and a motor installed on a pedestal 9 is installed on the upstream side of the slag storage tank 2. 10 and a pair of speed reducers 11, a long rotating shaft 12 with a stirring blade attached to its tip is vertically installed (the figure shows one arranged at three locations).

Further, a weir 5 having a slag outflow hole 4 opened at a required height position on the downstream side of the slag storage tank 2 is disposed so as to be movable up and down.

The weir 5 can be raised and lowered by connecting the tip of the piston rod of a cylinder 13 suspended on the pedestal 9 to a connecting member 14 fixed to the upper end of the weir 5 and operating the cylinder 13. It is something to do.

Further, a slag trough 6 for slow cooling is provided in the slag storage tank 2 between the weir 5 and the slag rain gutter 7, and a slag trough 6 for slow cooling is installed horizontally on the branching path of the slag to form the slag outflow hole 4 and the slag outflow hole 4. The gutter on the further downstream side is connected by a so-called slag gutter consisting of an inclined gutter 8 and a slag rain gutter 7.

Note that 15 indicates a connection gutter attached to the slag outflow hole 4.

The inclined gutter 8 has a starting end supported by a support rod 16 suspended from a connecting member 14, and a terminal end connected by a tilting wire 17 wound around a frame 9.

19 indicates the wire winding device.

The tilting wire 17 is wound around the starting end of the inclined gutter 8 as a fulcrum, so that the terminal end can be raised and lowered to open and close the flow to the downstream side.

Further, the driving device may be a device that is lifted by a crane or the like, or a device that is pushed up by a cylinder gear or the like.

The slag outflow hole 4 is opened at a height that allows the upper layer of the slag stored in the slag storage tank 2 to flow down to the slag rain gutter 7 on the downstream side.

When the above device is used, the slag discharged from the blast furnace is collected in the slag storage tank 2 by the weir 5 provided in the slag storage tank 2, and a slag pool 18 is formed.

At this time, the lubricant feeding device that feeds lubricant to bring the temperature suitable for granulation treatment, and the slag stirring device 3 are operated to stir the slag in the slag storage tank 2.

As a result, the melt guns with different specific gravity mixed in the slag (
The slag (specific gravity approximately three times that of the slag) is promoted to fall by the stirring action, and in the slag storage tank 2, only the molten pig iron gradually falls downward and settles.

And, the pure upper layer of the slag pool 18 where hot metal does not mix,
In addition, only the slag that has fallen at a temperature suitable for granulation will overflow the weir 5.

That is, the slag flows through the slag outflow hole 4 and is sent to the slag rain gutter 7 on the downstream side via the inclined gutter 8.

Then, the slag further flows down and is supplied to a slag production device (not shown) installed in the slag gutter section for producing slag of good quality.

When the slag discharged from the blast furnace is completed and the production of slag is completed, the weir 5 is pulled up and the residual pig iron slag in the slag storage tank 2 is sequentially transferred to a slag connected to a dry pit or a slag steel car. The treatment of the slag is completed by discharging it to the cooling slag gutter 6.

Through the above operation, each charge of slag discharged from the blast furnace is subjected to granulation treatment.

As mentioned above, this idea is based on the provision of a fixed slag storage tank in the slag gutter that can separate the slag and hot metal, allowing only the most suitable slag to be sent to the slag manufacturing equipment. Not only can it be directly supplied without the need for a slag steel truck, it does not take up much space and can be manufactured at low cost.

In addition, only the slag flows out into the slag production apparatus, making it possible to produce extremely good slag without the danger of explosion, which is an extremely useful invention.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of this invention. 1...Slag gutter, 2...Slag storage tank, 3...
... Slag stirring device, 4... Slag outflow hole, 5
...Weir, 6... Slag trough for slow cooling, 7...
... Water slag rain gutter, 8... Slanted gutter.

Claims (1)

[Scope of utility model registration request] A slag storage tank is formed in the slag gutter, a slag stirring device is provided on the upstream side of the slag storage tank, and a weir with a slag outflow hole is provided on the downstream side so as to be able to rise and fall freely. A water slag trough for slag connected to the slag outflow hole and leading the slag to the slag production equipment, and a slag trough for slow cooling connected to a dry pit or a slag steel car are arranged on the downstream side of the weir. Slag supply device for slag production.