CN201081561Y - Bottom air blowing component of alarm type electric arc furnace - Google Patents

Abstract

The utility model belongs to the metallurgical equipment field, in particular to an alarm type electric arc furnace bottom blowing air feeding element. Under the safety height line of the air feeding element, an alarm steel tube (2) with closed ends is buried at the internal bottom of the air feeding element; meanwhile, the alarm steel tube (2) is welded on an air chamber bottom board (7) and communicated with an alarm air inlet pipe (5), the inlet air of the alarm steel tube is independent form a bottom blowing inlet pipe (6), educed out of an air chamber (4) and connected with an air feeding system; moreover, the alarm steel tube (2) is connected with a flow rate detection device. Compared with the prior art, the utility model can obviously alarm when the air feeding element is corroded to an unsafe height, and has the advantages that when an unsafe signal occurs, operators can change the electric arc furnace bottom blowing air feeding element in time, thereby not only guaranteeing the reasonable utilization of the air feeding element, but also guaranteeing the safety of manufacturing.

Description

Bottom blowing gas supply element for alarm electric arc furnace

technical field

The utility model belongs to the field of metallurgical equipment, in particular to an alarm type electric arc furnace bottom blowing gas supply element.

Background technique

In the prior art, the bottom-blown gas supply element of the electric arc furnace is continuously corroded during the steelmaking process. Since the residual height of the traditional gas supply element cannot be measured, premature shutdown of the furnace to replace the gas supply element will cause unnecessary waste; if If it is replaced too late, when the bottom blowing air supply element is corroded, it will cause a steel leakage accident. Because the traditional electric arc furnace bottom blowing gas supply element has no safety alarm structure, the operator cannot understand the degree of corrosion, and it is difficult to replace the gas supply element at the right time. Therefore, it is neither possible to ensure the rational use of the gas supply element nor production safety.

Utility model content

The purpose of the utility model is to provide an alarm type electric arc furnace bottom-blown gas supply element which can clearly alarm when the bottom-blown gas supply element is corroded to an unsafe height.

According to the above purpose, the overall technical solution of the utility model is: a safety structure capable of alerting the operator is provided at the lower part of the electric arc furnace bottom blowing gas supply element. The air intake pipe is directly connected to the alarm steel pipe, and its air intake is independent of the bottom blowing air intake.

According to above-mentioned purpose and overall technical scheme, the concrete technical scheme of the utility model is:

The air supply element is composed of a capillary steel pipe 1, a refractory material body 3, an air chamber 4, a bottom blowing air pipe 6, and an air chamber bottom plate 7; the capillary steel pipe 1 for air supply is inserted into the air chamber bottom plate 7; Below the height line, an alarm steel pipe 2 with a closed end is buried at the inner bottom of the gas supply element, and at the same time, the alarm steel pipe 2 is welded on the bottom plate 7 of the air chamber, and communicated with the alarm inlet pipe 5, and its air intake is independent of the bottom blower. The air intake pipe 6 leads out of the air chamber 4 and connects with the air supply system; in addition, the alarm steel pipe 2 is connected with the flow detection device.

Wherein, the height of the alarm steel pipe (2) is the minimum safe height of the gas supply element.

Compared with the prior art, the utility model can clearly alarm when the bottom blowing gas supply element is corroded to an unsafe height; when an unsafe signal appears, the operator can replace the electric arc furnace bottom blowing gas supply element in time, It not only ensures the reasonable utilization of the gas supply components, but also ensures the advantages of production safety.

The above advantages are specifically as follows: using the electric arc furnace bottom blowing gas supply element with a safety alarm structure provided by the utility model, when used within a safe range, the ventilation volume of the alarm steel pipe is zero. When the gas supply element is corroded to a safe height, the alarm steel pipe is melted, and the air flow rate increases sharply, which is immediately displayed on the special alarm ventilation flow meter, and an alarm is sent to the operator, and the operator can stop the furnace in time according to the situation Replace the bottom blowing air supply element to prevent steel leakage accidents.

Description of drawings

Accompanying drawing 1 is the structure schematic diagram of the alarm type electric arc furnace bottom blowing gas supply element of the utility model.

Among the above-mentioned accompanying drawings, 1 is a capillary steel pipe, 2 is an alarm steel pipe, 3 is a refractory main body, 4 is an air chamber, 5 is an alarm inlet pipe, 6 is a bottom blowing air pipe, and 7 is an air chamber bottom plate.

specific implementation plan

Bottom blowing gas supply is carried out by adopting the alarm type electric arc furnace bottom blowing gas supply element of the utility model. The gas supply element is composed of capillary steel pipe 1, refractory material main body 3, gas chamber 4, bottom blowing air pipe 6, and gas chamber bottom plate 7; The capillary steel pipe 1 for air supply is inserted into the bottom plate 7 of the air chamber; below the safety height line of the air supply element, an alarm steel pipe 2 with a closed end is buried at the inner bottom of the air supply element, and the alarm steel pipe 2 is welded to the air chamber On the bottom plate 7, it communicates with the alarm intake pipe 5, its air intake is independent of the bottom blowing intake pipe 6, and is drawn out of the air chamber 4, and connected with the air supply system; in addition, the alarm steel pipe 2 is connected with the flow detection device. Wherein, the height of the alarm steel pipe 2 is the minimum safe height of the air supply element.

In addition, the alarm steel pipe 2 adopts a stainless steel pipe of φ6mm. The height of the capillary steel pipe 1 is the distance from the bottom to the top of the air-permeable brick. The bottom blowing gas supply element of the electric arc furnace is formed by isostatic pressing, and the refractory matrix is magnesium carbon.

Using the electric arc furnace bottom blowing gas supply element with a safety alarm structure provided by the utility model, when used within a safe range, the alarm steel pipe is closed due to the end, and the flow rate is zero; when the gas supply element is corroded to an unsafe height , the alarm steel pipe is melted, the gas supply volume increases sharply, it will be displayed on the gas supply flow meter immediately, and an alarm will be sent to the operator, and the operator can stop the furnace in time to replace the gas supply element according to the situation, so as to prevent steel leakage accidents.

Claims (1)

1. Alarm-type electric arc furnace bottom blowing gas supplying components, this air supply device is made up of capillary tubing (1), refractory material of body (3), air chamber (4), bottom blowing air inlet pipe (6), air chamber base plate (7); The capillary tubing (1) that air feed is used inserts in the air chamber base plate (7); It is characterized in that under air supply device safe altitude line, bury the warning steel pipe (2) of radicle sealing underground at the air supply device inner bottom part, simultaneously warning steel pipe (2) is welded on the air chamber base plate (7), and communicate with warning air inlet pipe (5), its air inlet is independent of bottom blowing air inlet pipe (6), draw outside the air chamber (4), join with air supply system; In addition, warning steel pipe (2) is connected with flow detector.

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