JPS58144715A - Apparatus for measuring flow rate of slag flowing out of blast furnace - Google Patents

Abstract

PURPOSE:To measure the flow rate of the slag from the blast furnace, by measuring the flow speed of the slag from the blast furnace and the level of the slag, and computing the results. CONSTITUTION:A current meter 1 is a ultrasonic wave current meter, which measures the flow speed of the slag from the blast furnace. The measurd signal is continuously inputted to a computing circuit 3. A contactless level meter 2 continuously mesures the level of the slag of the blast furnace, and the measured signal is inputted to the circuit 3. In the circuit 3, the measured signals from the current meter 1 and the level meter 2 are inputted and the computation of the flow rate of the slag is continuously performed. The flow rate of the slag computed in the circuit 3 is displayed by a display circuit 4. It is desirable to connect a recording circuit 22 to the circuit 4 and to record the amount of the slag.

Description

[Detailed description of the invention] The present invention relates to a blast furnace slag flow rate measuring device.

A lack of furnace slag from the blast furnace has a detrimental effect on blast furnace operations. In order to stabilize blast furnace operation, it is necessary to rapidly and continuously measure the blast furnace slag flow rate and take prompt action based on the measured value.

By the way, blast furnace slag has a high melting rate (and high viscosity), so it is very difficult to measure the flow rate quickly and continuously in a liquid O state, so it is currently not put into practical use.

Therefore, as for the amount of slag coming out since lt, 0111 + constant, there is a method of mainly determining the approximate value of the amount of slag O by visual inspection, or a method of receiving the slag into a pot and weighing the whole pot to find the flow rate of S. etc.

However, these conventional O methods only measure discontinuously, and the measurements may be delayed.

It was difficult to make use of it for stable operation of blast furnaces.

Thus, the present invention provides 1. It was devised to eliminate these conventional drawbacks, and the object is to provide a blast furnace slag flow rate measuring device 1 m that can continuously measure the flow rate tfl of blast furnace slag.

For the purpose of continuous measurement of slag coming out of a blast furnace, the 4I mold of the present invention is used, for example, by installing the device according to the present invention in the middle of a slag gutter and measuring the level and flow rate of flowing slag using ultrasonic waves or the like. The aim is to measure the flow rate quickly.

The present invention will be explained below based on the embodiment shown in the drawings.

Figure ts1 is a block diagram showing one embodiment of the single-shot fIi40, where reference numeral 1 indicates an ultrasonic flow velocity needle that determines the flow velocity Vt1111 of the blast furnace slag, and the measurement signal of the flow velocity V measured by this flow velocity needle 1 is calculated. It is continuously input to the circuit S.

Reference numeral 2 is a non-contact level needle that determines the level of blast furnace slag. Generally, this level needle 2 is composed of an ultrasonic level needle, but is not limited to this. It is fine as long as it can be measured accurately.

The level L of the blast furnace slag is continuously measured by the level needle 2, and a measurement signal indicating this level Lvr is sent to the calculation circuit 3.
is input.

The arithmetic circuit 5 receives measurement signals from the ultrasonic flow rate needle 1 and the non-contact level needle S.
The operations to illj are performed continuously. Therefore, the flow rate Q can be measured using the following formula: q L x M x K (coefficient) x
The slag flow rate Q calculated by the Ii (time) calculation circuit 5 is displayed by the display circuit 4. The display circuit 4 may be configured with a display that displays in an analog manner, or may be configured with a digital display that displays the flow rate Q using a digital converter.

Note that a recording circuit 227 is connected to this display circuit 4.

Slag flow rate Q continuously displayed by display circuit 4
It is better to keep it in mind.

Next, we will discuss the detection @50 configuration of the flow rate measuring device according to the present invention.
#This will be explained with reference to FIGS. I2 to 5.

Hot metal 7 tapped from the blast furnace 6 passes through a hot metal gutter 8 and is received into a hot metal ladle 9. The hot metal is transported to the next process in the steelmaking factory through the hot metal ladle 9.

The slag 10/fi passes through the slag trough 111 and is poured directly into the dry pit 12, but the slag shown in FIG. 5 may be subjected to a separate water crushing treatment 15 or the like.

By the way; the detection unit 5 of the original @ ORit 1111 determination device is installed in the slag 'm11O.

The bottom wall 14 of the detection part 5 is made of firebrick so that it can withstand the hot metal 7 that has flowed into the slag trough 11. The center 614.14 is formed of a steel plate or the like having a hollow part □17. At the center 1114° 116 of t, an ultrasonic current meter 1 for measuring the flow velocity V7 of the slag 10 is attached, and the measurement is carried out by ultrasonic waves. This is possible.

Further, the center @ 16 14 is installed with a narrow width so that the passage of the slag 10 becomes a constricted portion.

By forming the narrowed portion in this manner, even if the amount of slag 10 passing through is small, it can be accurately measured.

Further, it is assumed that cooling water 1st is circulated in the center 1114t of the hollow part 17 of the machine to be cooled.

In addition, on both sides of the center 11160, there are retaining l119.1? l Mounting, the central wall 141 is reinforced, the central wall 16 and retaining lit? Te111111! t
'III has been completed.

Furthermore, a cliff machine part 20 is main staged from the tip of one center @16, and two non-contact level gauges such as ultrasonic waves are attached to this m machine part 200T, and it passes between the centers 1i14 and 14. The structure is such that the level of the slag 1o can be kept constant.

It is assumed that the root part 20 is cooled by passing cooling compressed air 21 or the like through the inside of a hollow that can withstand high temperatures.

Therefore, the detection part 5 is made of IIcIII as described above, and if it is made of two nits, it can be easily hooked.
Also, it is difficult to easily change the Kjllj.

Thus, the present invention has the above configuration and is a blast furnace slag flow rate measuring device according to the present invention.

It is very important to contribute to the stabilization of blast furnace operation by quickly and continuously regulating the sludder O flow rate tm.

4. Brief explanation of the drawings - 1st g is a plotter diagram showing an embodiment of the present invention.

Fig. 2 and Fig. 5 are a vertical view and a cross-sectional view of the detection part in the present invention, the fourth figure is a perspective view of the detection part, and Fig. 5 is a schematic showing the outline of the furnace operation. .

1. Ultrasonic current arresting needle, 2. Non-contact level needle, 3.
Arithmetic circuit, 4...Display circuit, 5...Furnace, 7...Pig iron, 8...Pigtail path, 9...III mirror! 14.
10...Slag, 11...#-112...Dry pit, 13...Water granulation treatment, 14...Bottom wall, 15...@wall, 1
6...Central wall, 17...Hollow part, 18...Cooling water, 19
...Retaining wall, 20...Front base, 21...Cooling pressure at total air 22...Recording circuit Fig. 2 Fig. 3 Fig. 4 Fig. 5

Claims (1)

[Claims] ^ An ultrasonic flow rate needle that determines the furnace slag O flow rate t#J, a non-contact level needle that measures the level of the slag, the flow rate needle and the non-contact level, and a measurement signal from the needle is input. #1: A blast furnace slag flow rate measuring device comprising: an arithmetic circuit for calculating the flow rate of blast furnace slag; a display circuit for continuously displaying the flow rate;